./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/down.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/down.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 d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:50:43,423 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:50:43,474 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:50:43,481 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:50:43,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:50:43,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:50:43,503 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:50:43,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:50:43,503 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:50:43,503 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:50:43,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:50:43,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:50:43,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:50:43,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:50:43,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:50:43,506 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:50:43,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:50:43,507 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:50:43,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:50:43,508 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:50:43,508 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 -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2025-03-16 17:50:43,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:50:43,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:50:43,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:50:43,720 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:50:43,720 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:50:43,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/down.i [2025-03-16 17:50:44,792 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d729d87de/ad5e061139894dc68da6b9e9774fcd5b/FLAGe2142b2f7 [2025-03-16 17:50:44,983 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:50:44,984 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/down.i [2025-03-16 17:50:44,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d729d87de/ad5e061139894dc68da6b9e9774fcd5b/FLAGe2142b2f7 [2025-03-16 17:50:45,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d729d87de/ad5e061139894dc68da6b9e9774fcd5b [2025-03-16 17:50:45,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:50:45,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:50:45,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:50:45,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:50:45,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:50:45,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1574222b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45, skipping insertion in model container [2025-03-16 17:50:45,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,365 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:50:45,458 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/down.i[893,906] [2025-03-16 17:50:45,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:50:45,475 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:50:45,483 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/down.i[893,906] [2025-03-16 17:50:45,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:50:45,497 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:50:45,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45 WrapperNode [2025-03-16 17:50:45,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:50:45,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:50:45,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:50:45,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:50:45,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,518 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2025-03-16 17:50:45,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:50:45,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:50:45,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:50:45,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:50:45,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,526 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,533 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 17:50:45,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,537 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:50:45,542 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:50:45,542 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:50:45,542 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:50:45,543 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (1/1) ... [2025-03-16 17:50:45,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:50:45,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:45,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 17:50:45,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 17:50:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:50:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:50:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:50:45,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:50:45,622 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:50:45,623 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:50:45,689 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 17:50:45,689 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:50:45,694 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:50:45,695 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:50:45,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:50:45 BoogieIcfgContainer [2025-03-16 17:50:45,695 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:50:45,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:50:45,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:50:45,700 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:50:45,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:50:45" (1/3) ... [2025-03-16 17:50:45,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7451a2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:50:45, skipping insertion in model container [2025-03-16 17:50:45,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:45" (2/3) ... [2025-03-16 17:50:45,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7451a2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:50:45, skipping insertion in model container [2025-03-16 17:50:45,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:50:45" (3/3) ... [2025-03-16 17:50:45,703 INFO L128 eAbstractionObserver]: Analyzing ICFG down.i [2025-03-16 17:50:45,712 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:50:45,715 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG down.i that has 1 procedures, 9 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 17:50:45,753 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:50:45,759 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;@66b50fb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:50:45,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:50:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-16 17:50:45,764 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:45,765 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-16 17:50:45,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:45,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash 37155270, now seen corresponding path program 1 times [2025-03-16 17:50:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:45,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364135969] [2025-03-16 17:50:45,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:45,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-16 17:50:45,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-16 17:50:45,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:45,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:45,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364135969] [2025-03-16 17:50:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364135969] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:50:45,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:50:45,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 17:50:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706734222] [2025-03-16 17:50:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:50:45,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:50:45,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:45,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:50:45,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:50:45,953 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:45,983 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2025-03-16 17:50:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 17:50:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2025-03-16 17:50:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:45,990 INFO L225 Difference]: With dead ends: 18 [2025-03-16 17:50:45,990 INFO L226 Difference]: Without dead ends: 8 [2025-03-16 17:50:45,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:50:45,994 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:45,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2025-03-16 17:50:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2025-03-16 17:50:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2025-03-16 17:50:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2025-03-16 17:50:46,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2025-03-16 17:50:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:46,012 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2025-03-16 17:50:46,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2025-03-16 17:50:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 17:50:46,013 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:46,013 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 17:50:46,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:50:46,014 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:46,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1152768638, now seen corresponding path program 1 times [2025-03-16 17:50:46,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:46,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226888343] [2025-03-16 17:50:46,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:46,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:46,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 17:50:46,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 17:50:46,026 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:46,026 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:46,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226888343] [2025-03-16 17:50:46,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226888343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243492522] [2025-03-16 17:50:46,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:46,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:46,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:46,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:50:46,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 17:50:46,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 17:50:46,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:46,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:46,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 17:50:46,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:46,208 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 17:50:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243492522] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:50:46,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 17:50:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 17:50:46,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561662230] [2025-03-16 17:50:46,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:50:46,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 17:50:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:46,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 17:50:46,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-16 17:50:46,210 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:46,241 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2025-03-16 17:50:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 17:50:46,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2025-03-16 17:50:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:46,243 INFO L225 Difference]: With dead ends: 18 [2025-03-16 17:50:46,243 INFO L226 Difference]: Without dead ends: 16 [2025-03-16 17:50:46,243 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:50:46,243 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:46,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-16 17:50:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 10. [2025-03-16 17:50:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2025-03-16 17:50:46,247 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2025-03-16 17:50:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:46,247 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2025-03-16 17:50:46,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2025-03-16 17:50:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 17:50:46,247 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:46,247 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:50:46,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:46,448 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 [2025-03-16 17:50:46,448 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:46,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -427134326, now seen corresponding path program 1 times [2025-03-16 17:50:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117369940] [2025-03-16 17:50:46,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:46,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 17:50:46,459 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:50:46,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:46,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:46,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117369940] [2025-03-16 17:50:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117369940] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847549378] [2025-03-16 17:50:46,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:46,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:46,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:50:46,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 17:50:46,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:50:46,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:46,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:46,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 17:50:46,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:46,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847549378] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:46,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:46,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2025-03-16 17:50:46,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961966594] [2025-03-16 17:50:46,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:46,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:50:46,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:46,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:50:46,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:50:46,622 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.5) 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) [2025-03-16 17:50:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:46,640 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2025-03-16 17:50:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 17:50:46,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) 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 [2025-03-16 17:50:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:46,641 INFO L225 Difference]: With dead ends: 20 [2025-03-16 17:50:46,641 INFO L226 Difference]: Without dead ends: 11 [2025-03-16 17:50:46,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:50:46,642 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:46,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-03-16 17:50:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-03-16 17:50:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2025-03-16 17:50:46,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2025-03-16 17:50:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:46,644 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2025-03-16 17:50:46,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) 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) [2025-03-16 17:50:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2025-03-16 17:50:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 17:50:46,644 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:46,644 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2025-03-16 17:50:46,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 17:50:46,847 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 [2025-03-16 17:50:46,847 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:46,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1988739262, now seen corresponding path program 2 times [2025-03-16 17:50:46,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:46,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159523986] [2025-03-16 17:50:46,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:46,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:46,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-16 17:50:46,856 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:50:46,857 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:46,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:46,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:46,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159523986] [2025-03-16 17:50:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159523986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860301771] [2025-03-16 17:50:46,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:46,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:46,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:46,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:50:46,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-16 17:50:46,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:50:46,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:46,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:46,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 17:50:46,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860301771] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:47,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:47,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-03-16 17:50:47,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853518776] [2025-03-16 17:50:47,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:47,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:50:47,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:47,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:50:47,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:50:47,038 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:47,088 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2025-03-16 17:50:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 17:50:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2025-03-16 17:50:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:47,089 INFO L225 Difference]: With dead ends: 22 [2025-03-16 17:50:47,089 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 17:50:47,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:50:47,094 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:47,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 17:50:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2025-03-16 17:50:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2025-03-16 17:50:47,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2025-03-16 17:50:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:47,096 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2025-03-16 17:50:47,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2025-03-16 17:50:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 17:50:47,097 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:47,097 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2025-03-16 17:50:47,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:47,297 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 [2025-03-16 17:50:47,297 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:47,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1751603386, now seen corresponding path program 3 times [2025-03-16 17:50:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880243394] [2025-03-16 17:50:47,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:47,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:47,302 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13 statements into 3 equivalence classes. [2025-03-16 17:50:47,307 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:50:47,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:50:47,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:47,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880243394] [2025-03-16 17:50:47,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880243394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:47,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805423870] [2025-03-16 17:50:47,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:47,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:47,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:47,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:47,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:50:47,412 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13 statements into 3 equivalence classes. [2025-03-16 17:50:47,423 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 17:50:47,423 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:50:47,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:50:47,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805423870] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:47,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2025-03-16 17:50:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404806767] [2025-03-16 17:50:47,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:47,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:50:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:47,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:50:47,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:50:47,496 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:47,519 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2025-03-16 17:50:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 17:50:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2025-03-16 17:50:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:47,520 INFO L225 Difference]: With dead ends: 27 [2025-03-16 17:50:47,520 INFO L226 Difference]: Without dead ends: 15 [2025-03-16 17:50:47,520 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:50:47,521 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:47,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-16 17:50:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-16 17:50:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2025-03-16 17:50:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2025-03-16 17:50:47,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2025-03-16 17:50:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:47,523 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2025-03-16 17:50:47,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2025-03-16 17:50:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 17:50:47,523 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:47,523 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2025-03-16 17:50:47,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 17:50:47,728 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 [2025-03-16 17:50:47,728 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:47,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash 299849726, now seen corresponding path program 4 times [2025-03-16 17:50:47,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:47,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641261950] [2025-03-16 17:50:47,728 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:47,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:47,735 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 14 statements into 2 equivalence classes. [2025-03-16 17:50:47,741 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 17:50:47,741 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:47,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641261950] [2025-03-16 17:50:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641261950] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014377605] [2025-03-16 17:50:47,803 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:47,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:47,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:47,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:50:47,824 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 14 statements into 2 equivalence classes. [2025-03-16 17:50:47,832 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 17:50:47,832 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:47,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 17:50:47,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014377605] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:47,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:47,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2025-03-16 17:50:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972946874] [2025-03-16 17:50:47,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:47,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 17:50:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:47,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 17:50:47,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 17:50:47,905 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2025-03-16 17:50:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:47,939 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2025-03-16 17:50:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 17:50:47,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) Word has length 14 [2025-03-16 17:50:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:47,940 INFO L225 Difference]: With dead ends: 26 [2025-03-16 17:50:47,940 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 17:50:47,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2025-03-16 17:50:47,941 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:47,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 17:50:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2025-03-16 17:50:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2025-03-16 17:50:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2025-03-16 17:50:47,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2025-03-16 17:50:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:47,943 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2025-03-16 17:50:47,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2025-03-16 17:50:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2025-03-16 17:50:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 17:50:47,944 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:47,944 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1] [2025-03-16 17:50:47,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 17:50:48,144 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 [2025-03-16 17:50:48,145 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:48,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash -707918582, now seen corresponding path program 5 times [2025-03-16 17:50:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:48,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347585063] [2025-03-16 17:50:48,145 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:48,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:48,149 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 4 equivalence classes. [2025-03-16 17:50:48,157 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 17:50:48,157 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 17:50:48,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347585063] [2025-03-16 17:50:48,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347585063] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083844929] [2025-03-16 17:50:48,233 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:48,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:48,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:48,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:48,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:50:48,261 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 4 equivalence classes. [2025-03-16 17:50:48,271 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 17:50:48,271 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-16 17:50:48,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 17:50:48,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083844929] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:48,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:48,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2025-03-16 17:50:48,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47549488] [2025-03-16 17:50:48,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:48,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 17:50:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:48,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 17:50:48,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:50:48,365 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:48,396 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2025-03-16 17:50:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 17:50:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2025-03-16 17:50:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:48,397 INFO L225 Difference]: With dead ends: 34 [2025-03-16 17:50:48,397 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 17:50:48,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:50:48,397 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:48,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 17:50:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 17:50:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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) [2025-03-16 17:50:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2025-03-16 17:50:48,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2025-03-16 17:50:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:48,400 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2025-03-16 17:50:48,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2025-03-16 17:50:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 17:50:48,400 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:48,400 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2025-03-16 17:50:48,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:48,601 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 [2025-03-16 17:50:48,601 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:48,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2002622914, now seen corresponding path program 6 times [2025-03-16 17:50:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706504804] [2025-03-16 17:50:48,601 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:48,605 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 4 equivalence classes. [2025-03-16 17:50:48,610 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 17:50:48,610 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 17:50:48,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:48,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706504804] [2025-03-16 17:50:48,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706504804] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:48,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2867365] [2025-03-16 17:50:48,684 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:48,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:48,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 17:50:48,708 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 4 equivalence classes. [2025-03-16 17:50:48,717 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 17:50:48,718 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-16 17:50:48,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:50:48,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2867365] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:48,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-16 17:50:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504733787] [2025-03-16 17:50:48,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:48,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 17:50:48,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:48,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 17:50:48,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:50:48,806 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:48,848 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2025-03-16 17:50:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 17:50:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2025-03-16 17:50:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:48,849 INFO L225 Difference]: With dead ends: 30 [2025-03-16 17:50:48,849 INFO L226 Difference]: Without dead ends: 28 [2025-03-16 17:50:48,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:50:48,850 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:48,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-16 17:50:48,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2025-03-16 17:50:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2025-03-16 17:50:48,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2025-03-16 17:50:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:48,852 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2025-03-16 17:50:48,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2025-03-16 17:50:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 17:50:48,852 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:48,852 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2025-03-16 17:50:48,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:49,053 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 [2025-03-16 17:50:49,053 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:49,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1250607930, now seen corresponding path program 7 times [2025-03-16 17:50:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:49,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958013640] [2025-03-16 17:50:49,054 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:49,057 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-16 17:50:49,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:50:49,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:49,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958013640] [2025-03-16 17:50:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958013640] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201823476] [2025-03-16 17:50:49,149 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:49,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:49,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:49,151 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:49,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 17:50:49,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-16 17:50:49,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 17:50:49,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:49,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:49,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 17:50:49,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201823476] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:49,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:49,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2025-03-16 17:50:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935458874] [2025-03-16 17:50:49,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:49,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:50:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:49,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:50:49,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:50:49,278 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2025-03-16 17:50:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:49,315 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2025-03-16 17:50:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 17:50:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 21 [2025-03-16 17:50:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:49,316 INFO L225 Difference]: With dead ends: 41 [2025-03-16 17:50:49,317 INFO L226 Difference]: Without dead ends: 23 [2025-03-16 17:50:49,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:50:49,317 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:49,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-16 17:50:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-16 17:50:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2025-03-16 17:50:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2025-03-16 17:50:49,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2025-03-16 17:50:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:49,320 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2025-03-16 17:50:49,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2025-03-16 17:50:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2025-03-16 17:50:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 17:50:49,322 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:49,322 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2025-03-16 17:50:49,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:49,526 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 [2025-03-16 17:50:49,526 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:49,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 658224510, now seen corresponding path program 8 times [2025-03-16 17:50:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104176113] [2025-03-16 17:50:49,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:49,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-16 17:50:49,539 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 17:50:49,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:49,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:49,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104176113] [2025-03-16 17:50:49,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104176113] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089961591] [2025-03-16 17:50:49,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:49,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:49,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:49,636 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:49,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 17:50:49,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-16 17:50:49,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 17:50:49,667 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:49,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:49,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 17:50:49,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089961591] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:49,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:49,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2025-03-16 17:50:49,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407734567] [2025-03-16 17:50:49,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:49,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 17:50:49,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:49,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 17:50:49,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-03-16 17:50:49,771 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:49,830 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2025-03-16 17:50:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 17:50:49,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2025-03-16 17:50:49,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:49,831 INFO L225 Difference]: With dead ends: 34 [2025-03-16 17:50:49,831 INFO L226 Difference]: Without dead ends: 32 [2025-03-16 17:50:49,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2025-03-16 17:50:49,832 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:49,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-16 17:50:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2025-03-16 17:50:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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) [2025-03-16 17:50:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2025-03-16 17:50:49,834 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2025-03-16 17:50:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:49,834 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2025-03-16 17:50:49,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2025-03-16 17:50:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 17:50:49,835 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:49,835 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1] [2025-03-16 17:50:49,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 17:50:50,036 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 [2025-03-16 17:50:50,036 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:50,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1653426294, now seen corresponding path program 9 times [2025-03-16 17:50:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:50,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708283202] [2025-03-16 17:50:50,038 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:50,041 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-03-16 17:50:50,048 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:50:50,048 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 17:50:50,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708283202] [2025-03-16 17:50:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708283202] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676396037] [2025-03-16 17:50:50,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:50,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:50,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:50,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 17:50:50,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 6 equivalence classes. [2025-03-16 17:50:50,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:50:50,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 17:50:50,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:50,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:50:50,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676396037] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:50,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:50,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2025-03-16 17:50:50,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133717920] [2025-03-16 17:50:50,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:50,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 17:50:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:50,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 17:50:50,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:50:50,285 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2025-03-16 17:50:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:50,332 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2025-03-16 17:50:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 17:50:50,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) Word has length 25 [2025-03-16 17:50:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:50,332 INFO L225 Difference]: With dead ends: 48 [2025-03-16 17:50:50,333 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 17:50:50,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:50:50,333 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:50,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 17:50:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-16 17:50:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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) [2025-03-16 17:50:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2025-03-16 17:50:50,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2025-03-16 17:50:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:50,336 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2025-03-16 17:50:50,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2025-03-16 17:50:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2025-03-16 17:50:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 17:50:50,336 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:50,336 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2025-03-16 17:50:50,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:50,537 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 [2025-03-16 17:50:50,537 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:50,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1633555522, now seen corresponding path program 10 times [2025-03-16 17:50:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066011947] [2025-03-16 17:50:50,538 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:50,542 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 17:50:50,548 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 17:50:50,548 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:50,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066011947] [2025-03-16 17:50:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066011947] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419699316] [2025-03-16 17:50:50,672 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:50,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:50,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 17:50:50,703 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-16 17:50:50,716 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 17:50:50,716 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:50,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:50,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 17:50:50,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419699316] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:50,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:50,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2025-03-16 17:50:50,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624547478] [2025-03-16 17:50:50,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:50,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 17:50:50,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:50,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 17:50:50,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2025-03-16 17:50:50,837 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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) [2025-03-16 17:50:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:50,900 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2025-03-16 17:50:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 17:50:50,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 26 [2025-03-16 17:50:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:50,901 INFO L225 Difference]: With dead ends: 38 [2025-03-16 17:50:50,901 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 17:50:50,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2025-03-16 17:50:50,902 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:50,902 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 17:50:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2025-03-16 17:50:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2025-03-16 17:50:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2025-03-16 17:50:50,907 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2025-03-16 17:50:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:50,907 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2025-03-16 17:50:50,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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) [2025-03-16 17:50:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2025-03-16 17:50:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 17:50:50,908 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:50,908 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1] [2025-03-16 17:50:50,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:51,108 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 [2025-03-16 17:50:51,109 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:51,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1021005242, now seen corresponding path program 11 times [2025-03-16 17:50:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533022367] [2025-03-16 17:50:51,109 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:51,117 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 7 equivalence classes. [2025-03-16 17:50:51,124 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 17:50:51,125 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 17:50:51,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533022367] [2025-03-16 17:50:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533022367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174058690] [2025-03-16 17:50:51,245 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:51,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:51,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:51,247 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:51,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 17:50:51,271 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 7 equivalence classes. [2025-03-16 17:50:51,283 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 17:50:51,283 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 17:50:51,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:51,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 17:50:51,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174058690] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:51,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:51,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2025-03-16 17:50:51,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122608178] [2025-03-16 17:50:51,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:51,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 17:50:51,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:51,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 17:50:51,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-03-16 17:50:51,404 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2025-03-16 17:50:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:51,455 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2025-03-16 17:50:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 17:50:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 29 [2025-03-16 17:50:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:51,456 INFO L225 Difference]: With dead ends: 55 [2025-03-16 17:50:51,456 INFO L226 Difference]: Without dead ends: 31 [2025-03-16 17:50:51,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2025-03-16 17:50:51,456 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:51,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-16 17:50:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-03-16 17:50:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2025-03-16 17:50:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2025-03-16 17:50:51,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2025-03-16 17:50:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:51,468 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2025-03-16 17:50:51,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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) [2025-03-16 17:50:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2025-03-16 17:50:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 17:50:51,469 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:51,469 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2025-03-16 17:50:51,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:51,669 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 [2025-03-16 17:50:51,669 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:51,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1272777986, now seen corresponding path program 12 times [2025-03-16 17:50:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:51,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094896874] [2025-03-16 17:50:51,670 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:51,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:51,673 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 7 equivalence classes. [2025-03-16 17:50:51,683 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:50:51,683 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 17:50:51,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:51,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094896874] [2025-03-16 17:50:51,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094896874] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:51,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535844705] [2025-03-16 17:50:51,790 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:51,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:51,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:51,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:51,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 17:50:51,817 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 30 statements into 7 equivalence classes. [2025-03-16 17:50:51,830 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:50:51,831 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 17:50:51,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:51,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 17:50:51,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535844705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:51,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:51,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2025-03-16 17:50:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983229608] [2025-03-16 17:50:51,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:51,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 17:50:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:51,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 17:50:51,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-03-16 17:50:51,956 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:52,043 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2025-03-16 17:50:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 17:50:52,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2025-03-16 17:50:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:52,044 INFO L225 Difference]: With dead ends: 42 [2025-03-16 17:50:52,044 INFO L226 Difference]: Without dead ends: 40 [2025-03-16 17:50:52,044 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:50:52,045 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:52,045 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-16 17:50:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2025-03-16 17:50:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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) [2025-03-16 17:50:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2025-03-16 17:50:52,047 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2025-03-16 17:50:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:52,047 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2025-03-16 17:50:52,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2025-03-16 17:50:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 17:50:52,050 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:52,050 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1] [2025-03-16 17:50:52,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:52,251 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 [2025-03-16 17:50:52,251 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:52,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1356822006, now seen corresponding path program 13 times [2025-03-16 17:50:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557570326] [2025-03-16 17:50:52,251 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:52,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:52,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 17:50:52,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 17:50:52,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:52,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:52,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557570326] [2025-03-16 17:50:52,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557570326] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627633230] [2025-03-16 17:50:52,430 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:52,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:52,432 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:52,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 17:50:52,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 17:50:52,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 17:50:52,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:52,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:52,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 17:50:52,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:52,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:52,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627633230] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:52,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:52,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2025-03-16 17:50:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329086697] [2025-03-16 17:50:52,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:52,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 17:50:52,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:52,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 17:50:52,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2025-03-16 17:50:52,653 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2025-03-16 17:50:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:52,695 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2025-03-16 17:50:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 17:50:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 33 [2025-03-16 17:50:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:52,696 INFO L225 Difference]: With dead ends: 62 [2025-03-16 17:50:52,696 INFO L226 Difference]: Without dead ends: 35 [2025-03-16 17:50:52,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 15 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2025-03-16 17:50:52,696 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:52,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-16 17:50:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-16 17:50:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2025-03-16 17:50:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2025-03-16 17:50:52,701 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2025-03-16 17:50:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:52,701 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2025-03-16 17:50:52,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2025-03-16 17:50:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2025-03-16 17:50:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 17:50:52,702 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:52,702 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2025-03-16 17:50:52,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:52,906 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 [2025-03-16 17:50:52,906 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:52,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2128630078, now seen corresponding path program 14 times [2025-03-16 17:50:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:52,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934012272] [2025-03-16 17:50:52,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:52,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:52,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 17:50:52,915 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 17:50:52,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:52,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934012272] [2025-03-16 17:50:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934012272] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434882559] [2025-03-16 17:50:53,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:53,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:53,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:53,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 17:50:53,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 17:50:53,086 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 17:50:53,087 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:53,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:53,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 17:50:53,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434882559] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:53,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2025-03-16 17:50:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928220177] [2025-03-16 17:50:53,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:53,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 17:50:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:53,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 17:50:53,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:50:53,238 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:53,319 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2025-03-16 17:50:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 17:50:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2025-03-16 17:50:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:53,320 INFO L225 Difference]: With dead ends: 46 [2025-03-16 17:50:53,320 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 17:50:53,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2025-03-16 17:50:53,321 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:53,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 17:50:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2025-03-16 17:50:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2025-03-16 17:50:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2025-03-16 17:50:53,325 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2025-03-16 17:50:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:53,326 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2025-03-16 17:50:53,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2025-03-16 17:50:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 17:50:53,326 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:53,326 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1] [2025-03-16 17:50:53,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:53,527 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 [2025-03-16 17:50:53,527 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:53,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1174341574, now seen corresponding path program 15 times [2025-03-16 17:50:53,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:53,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40154252] [2025-03-16 17:50:53,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:53,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:53,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 9 equivalence classes. [2025-03-16 17:50:53,542 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 17:50:53,542 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 17:50:53,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40154252] [2025-03-16 17:50:53,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40154252] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258830211] [2025-03-16 17:50:53,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:53,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:53,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:53,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 17:50:53,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 9 equivalence classes. [2025-03-16 17:50:53,749 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 17:50:53,749 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 17:50:53,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:53,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-16 17:50:53,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258830211] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:53,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:53,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2025-03-16 17:50:53,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937627445] [2025-03-16 17:50:53,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:53,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 17:50:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:53,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 17:50:53,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:50:53,928 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2025-03-16 17:50:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:53,989 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2025-03-16 17:50:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 17:50:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 37 [2025-03-16 17:50:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:53,990 INFO L225 Difference]: With dead ends: 69 [2025-03-16 17:50:53,990 INFO L226 Difference]: Without dead ends: 39 [2025-03-16 17:50:53,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 17 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:50:53,990 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:53,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-16 17:50:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2025-03-16 17:50:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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) [2025-03-16 17:50:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2025-03-16 17:50:53,993 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2025-03-16 17:50:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:53,993 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2025-03-16 17:50:53,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2025-03-16 17:50:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2025-03-16 17:50:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 17:50:53,994 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:53,994 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2025-03-16 17:50:54,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 17:50:54,194 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 [2025-03-16 17:50:54,194 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:54,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:54,195 INFO L85 PathProgramCache]: Analyzing trace with hash 99422334, now seen corresponding path program 16 times [2025-03-16 17:50:54,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:54,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957468919] [2025-03-16 17:50:54,195 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:54,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:54,199 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-16 17:50:54,206 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 17:50:54,206 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:54,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:54,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:54,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957468919] [2025-03-16 17:50:54,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957468919] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:54,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713452349] [2025-03-16 17:50:54,328 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:54,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:54,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:54,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:54,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 17:50:54,359 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-16 17:50:54,373 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 17:50:54,374 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:54,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:54,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 17:50:54,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:54,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713452349] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:54,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:54,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 13 [2025-03-16 17:50:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100754145] [2025-03-16 17:50:54,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:54,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 17:50:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:54,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 17:50:54,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 17:50:54,545 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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) [2025-03-16 17:50:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:54,636 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2025-03-16 17:50:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 17:50:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 38 [2025-03-16 17:50:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:54,637 INFO L225 Difference]: With dead ends: 50 [2025-03-16 17:50:54,637 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 17:50:54,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2025-03-16 17:50:54,638 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:54,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 17:50:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2025-03-16 17:50:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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) [2025-03-16 17:50:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2025-03-16 17:50:54,640 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2025-03-16 17:50:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:54,640 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2025-03-16 17:50:54,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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) [2025-03-16 17:50:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2025-03-16 17:50:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 17:50:54,641 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:54,641 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1] [2025-03-16 17:50:54,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 17:50:54,841 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 [2025-03-16 17:50:54,842 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:54,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1635812214, now seen corresponding path program 17 times [2025-03-16 17:50:54,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:54,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572103593] [2025-03-16 17:50:54,842 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:54,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:54,846 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 10 equivalence classes. [2025-03-16 17:50:54,858 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 17:50:54,858 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 17:50:54,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:55,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572103593] [2025-03-16 17:50:55,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572103593] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:55,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582703946] [2025-03-16 17:50:55,038 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:55,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:55,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:55,040 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:55,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 17:50:55,068 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 41 statements into 10 equivalence classes. [2025-03-16 17:50:55,086 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 17:50:55,087 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 17:50:55,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:55,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-16 17:50:55,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582703946] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:55,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:55,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2025-03-16 17:50:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986563957] [2025-03-16 17:50:55,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:55,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 17:50:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:55,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 17:50:55,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-03-16 17:50:55,298 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2025-03-16 17:50:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:55,369 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2025-03-16 17:50:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 17:50:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 41 [2025-03-16 17:50:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:55,370 INFO L225 Difference]: With dead ends: 76 [2025-03-16 17:50:55,370 INFO L226 Difference]: Without dead ends: 43 [2025-03-16 17:50:55,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 19 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-03-16 17:50:55,370 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:55,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-16 17:50:55,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-03-16 17:50:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 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) [2025-03-16 17:50:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2025-03-16 17:50:55,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2025-03-16 17:50:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:55,375 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2025-03-16 17:50:55,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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) [2025-03-16 17:50:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2025-03-16 17:50:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 17:50:55,376 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:55,376 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2025-03-16 17:50:55,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 17:50:55,581 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 [2025-03-16 17:50:55,581 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:55,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash 843737410, now seen corresponding path program 18 times [2025-03-16 17:50:55,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:55,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912251842] [2025-03-16 17:50:55,584 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:55,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:55,588 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 10 equivalence classes. [2025-03-16 17:50:55,596 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 17:50:55,597 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 17:50:55,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:55,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912251842] [2025-03-16 17:50:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912251842] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:55,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013087703] [2025-03-16 17:50:55,741 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:55,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:55,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:55,743 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) [2025-03-16 17:50:55,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 17:50:55,772 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 42 statements into 10 equivalence classes. [2025-03-16 17:50:55,790 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 17:50:55,791 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 17:50:55,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:55,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 17:50:55,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013087703] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:55,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:55,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2025-03-16 17:50:55,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103905643] [2025-03-16 17:50:55,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:55,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 17:50:55,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:55,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 17:50:55,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2025-03-16 17:50:55,985 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:56,094 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2025-03-16 17:50:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 17:50:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2025-03-16 17:50:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:56,095 INFO L225 Difference]: With dead ends: 54 [2025-03-16 17:50:56,095 INFO L226 Difference]: Without dead ends: 52 [2025-03-16 17:50:56,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 20 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:50:56,096 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:56,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-16 17:50:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2025-03-16 17:50:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2025-03-16 17:50:56,098 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2025-03-16 17:50:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:56,098 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2025-03-16 17:50:56,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2025-03-16 17:50:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 17:50:56,099 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:56,099 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1] [2025-03-16 17:50:56,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 17:50:56,299 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 [2025-03-16 17:50:56,300 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:56,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1633434950, now seen corresponding path program 19 times [2025-03-16 17:50:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:56,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423541468] [2025-03-16 17:50:56,300 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:56,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 17:50:56,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 17:50:56,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:56,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:56,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423541468] [2025-03-16 17:50:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423541468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050576505] [2025-03-16 17:50:56,495 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:56,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:56,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:56,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 17:50:56,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 17:50:56,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 17:50:56,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:56,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:56,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 17:50:56,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:56,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:56,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050576505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:56,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:56,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2025-03-16 17:50:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691038950] [2025-03-16 17:50:56,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:56,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 17:50:56,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:56,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 17:50:56,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:50:56,752 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2025-03-16 17:50:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:56,825 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2025-03-16 17:50:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 17:50:56,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 45 [2025-03-16 17:50:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:56,826 INFO L225 Difference]: With dead ends: 83 [2025-03-16 17:50:56,826 INFO L226 Difference]: Without dead ends: 47 [2025-03-16 17:50:56,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 21 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:50:56,827 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:56,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-16 17:50:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-03-16 17:50:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2025-03-16 17:50:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2025-03-16 17:50:56,829 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2025-03-16 17:50:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:56,829 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2025-03-16 17:50:56,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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) [2025-03-16 17:50:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2025-03-16 17:50:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 17:50:56,830 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:56,830 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2025-03-16 17:50:56,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 17:50:57,030 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 [2025-03-16 17:50:57,031 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:57,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 133303806, now seen corresponding path program 20 times [2025-03-16 17:50:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:57,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322524312] [2025-03-16 17:50:57,031 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:57,036 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 17:50:57,040 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 17:50:57,040 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:57,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:57,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322524312] [2025-03-16 17:50:57,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322524312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:57,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310746365] [2025-03-16 17:50:57,189 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:57,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:57,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:57,191 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:57,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 17:50:57,221 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-16 17:50:57,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 17:50:57,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:57,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:57,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 17:50:57,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:57,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:57,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310746365] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:57,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:57,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2025-03-16 17:50:57,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306127784] [2025-03-16 17:50:57,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:57,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 17:50:57,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:57,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 17:50:57,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2025-03-16 17:50:57,448 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:57,564 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2025-03-16 17:50:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 17:50:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2025-03-16 17:50:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:57,568 INFO L225 Difference]: With dead ends: 58 [2025-03-16 17:50:57,568 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 17:50:57,568 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 23 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2025-03-16 17:50:57,569 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:57,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 17:50:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2025-03-16 17:50:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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) [2025-03-16 17:50:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2025-03-16 17:50:57,573 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2025-03-16 17:50:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:57,574 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2025-03-16 17:50:57,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2025-03-16 17:50:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 17:50:57,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:57,574 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1] [2025-03-16 17:50:57,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:57,779 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 [2025-03-16 17:50:57,779 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:57,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1590194422, now seen corresponding path program 21 times [2025-03-16 17:50:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885790483] [2025-03-16 17:50:57,779 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:57,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:57,787 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 12 equivalence classes. [2025-03-16 17:50:57,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 17:50:57,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 17:50:57,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:58,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:58,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885790483] [2025-03-16 17:50:58,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885790483] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:58,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900599541] [2025-03-16 17:50:58,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:58,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:58,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:58,025 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:58,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 17:50:58,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 12 equivalence classes. [2025-03-16 17:50:58,074 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 17:50:58,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 17:50:58,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:58,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 17:50:58,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:58,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:58,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900599541] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:58,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:58,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2025-03-16 17:50:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412855371] [2025-03-16 17:50:58,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:58,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 17:50:58,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:58,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 17:50:58,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:50:58,301 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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) [2025-03-16 17:50:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:58,364 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2025-03-16 17:50:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 17:50:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 49 [2025-03-16 17:50:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:58,365 INFO L225 Difference]: With dead ends: 90 [2025-03-16 17:50:58,365 INFO L226 Difference]: Without dead ends: 51 [2025-03-16 17:50:58,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 23 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:50:58,366 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:58,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-16 17:50:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-03-16 17:50:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2025-03-16 17:50:58,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2025-03-16 17:50:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:58,368 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2025-03-16 17:50:58,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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) [2025-03-16 17:50:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2025-03-16 17:50:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 17:50:58,368 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:58,369 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2025-03-16 17:50:58,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:58,569 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 [2025-03-16 17:50:58,569 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:58,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1921401794, now seen corresponding path program 22 times [2025-03-16 17:50:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:58,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552361770] [2025-03-16 17:50:58,570 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:58,573 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-16 17:50:58,579 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 17:50:58,579 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:58,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:58,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:58,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552361770] [2025-03-16 17:50:58,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552361770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:58,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936674473] [2025-03-16 17:50:58,752 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:58,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:58,754 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:58,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 17:50:58,790 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-16 17:50:58,807 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 17:50:58,807 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:58,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:58,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 17:50:58,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:58,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936674473] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:59,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:59,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2025-03-16 17:50:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901343309] [2025-03-16 17:50:59,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:59,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 17:50:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:59,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 17:50:59,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2025-03-16 17:50:59,008 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:59,143 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2025-03-16 17:50:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-16 17:50:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2025-03-16 17:50:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:59,144 INFO L225 Difference]: With dead ends: 62 [2025-03-16 17:50:59,144 INFO L226 Difference]: Without dead ends: 60 [2025-03-16 17:50:59,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 85 SyntacticMatches, 24 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2025-03-16 17:50:59,144 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:59,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-16 17:50:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2025-03-16 17:50:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 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) [2025-03-16 17:50:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2025-03-16 17:50:59,148 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2025-03-16 17:50:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:59,148 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2025-03-16 17:50:59,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2025-03-16 17:50:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 17:50:59,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:59,149 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1] [2025-03-16 17:50:59,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 17:50:59,349 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 [2025-03-16 17:50:59,350 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:59,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1452561094, now seen corresponding path program 23 times [2025-03-16 17:50:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:59,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651929650] [2025-03-16 17:50:59,350 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:59,355 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 13 equivalence classes. [2025-03-16 17:50:59,368 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 17:50:59,368 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-16 17:50:59,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:59,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:59,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651929650] [2025-03-16 17:50:59,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651929650] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:59,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476091697] [2025-03-16 17:50:59,599 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:59,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:59,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:59,600 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) [2025-03-16 17:50:59,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 17:50:59,634 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 13 equivalence classes. [2025-03-16 17:50:59,652 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 17:50:59,652 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-16 17:50:59,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:59,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 17:50:59,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:59,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:59,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476091697] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:59,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:59,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 27 [2025-03-16 17:50:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405973091] [2025-03-16 17:50:59,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:59,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 17:50:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:59,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 17:50:59,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2025-03-16 17:50:59,909 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2025-03-16 17:50:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:59,987 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2025-03-16 17:50:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 17:50:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 53 [2025-03-16 17:50:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:59,988 INFO L225 Difference]: With dead ends: 97 [2025-03-16 17:50:59,988 INFO L226 Difference]: Without dead ends: 55 [2025-03-16 17:50:59,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 25 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2025-03-16 17:50:59,988 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:59,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-16 17:50:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-03-16 17:50:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2025-03-16 17:50:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2025-03-16 17:50:59,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2025-03-16 17:50:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:59,992 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2025-03-16 17:50:59,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2025-03-16 17:50:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2025-03-16 17:50:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 17:50:59,992 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:59,992 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2025-03-16 17:50:59,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-16 17:51:00,192 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 [2025-03-16 17:51:00,193 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:00,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:00,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1014371458, now seen corresponding path program 24 times [2025-03-16 17:51:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:00,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997729248] [2025-03-16 17:51:00,193 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:00,198 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 54 statements into 13 equivalence classes. [2025-03-16 17:51:00,210 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 17:51:00,210 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-16 17:51:00,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:00,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997729248] [2025-03-16 17:51:00,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997729248] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031110834] [2025-03-16 17:51:00,370 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:00,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:00,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:00,371 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:00,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 17:51:00,409 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 54 statements into 13 equivalence classes. [2025-03-16 17:51:00,433 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 17:51:00,433 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-16 17:51:00,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:00,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 17:51:00,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:00,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031110834] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:00,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:00,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2025-03-16 17:51:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457437848] [2025-03-16 17:51:00,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:00,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 17:51:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:00,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 17:51:00,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2025-03-16 17:51:00,633 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:00,758 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2025-03-16 17:51:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-16 17:51:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2025-03-16 17:51:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:00,758 INFO L225 Difference]: With dead ends: 66 [2025-03-16 17:51:00,758 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 17:51:00,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 26 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:51:00,759 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:00,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 17:51:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2025-03-16 17:51:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 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) [2025-03-16 17:51:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2025-03-16 17:51:00,762 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2025-03-16 17:51:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:00,762 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2025-03-16 17:51:00,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2025-03-16 17:51:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-16 17:51:00,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:00,762 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1] [2025-03-16 17:51:00,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 17:51:00,962 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 [2025-03-16 17:51:00,963 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:00,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 250659210, now seen corresponding path program 25 times [2025-03-16 17:51:00,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16646979] [2025-03-16 17:51:00,963 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:00,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-16 17:51:00,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 17:51:00,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:00,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:01,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16646979] [2025-03-16 17:51:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16646979] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487505091] [2025-03-16 17:51:01,269 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:01,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:01,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:01,271 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:01,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 17:51:01,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-16 17:51:01,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 17:51:01,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:01,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:01,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 17:51:01,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:01,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487505091] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:01,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 29 [2025-03-16 17:51:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473497354] [2025-03-16 17:51:01,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:01,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-16 17:51:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:01,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-16 17:51:01,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2025-03-16 17:51:01,579 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 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) [2025-03-16 17:51:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:01,659 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2025-03-16 17:51:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-16 17:51:01,659 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 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 57 [2025-03-16 17:51:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:01,659 INFO L225 Difference]: With dead ends: 104 [2025-03-16 17:51:01,659 INFO L226 Difference]: Without dead ends: 59 [2025-03-16 17:51:01,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 27 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2025-03-16 17:51:01,660 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:01,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-16 17:51:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-03-16 17:51:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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) [2025-03-16 17:51:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2025-03-16 17:51:01,663 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2025-03-16 17:51:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:01,663 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2025-03-16 17:51:01,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 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) [2025-03-16 17:51:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2025-03-16 17:51:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 17:51:01,663 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:01,663 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2025-03-16 17:51:01,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:01,864 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 [2025-03-16 17:51:01,864 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:01,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1635466818, now seen corresponding path program 26 times [2025-03-16 17:51:01,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:01,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250536908] [2025-03-16 17:51:01,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:01,869 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-03-16 17:51:01,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 17:51:01,874 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:01,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250536908] [2025-03-16 17:51:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250536908] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857431098] [2025-03-16 17:51:02,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:02,056 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:02,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 17:51:02,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 58 statements into 2 equivalence classes. [2025-03-16 17:51:02,110 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 17:51:02,110 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:02,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:02,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-16 17:51:02,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:02,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:02,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857431098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:02,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:02,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2025-03-16 17:51:02,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492734394] [2025-03-16 17:51:02,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:02,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 17:51:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:02,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 17:51:02,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:51:02,357 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:02,478 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2025-03-16 17:51:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 17:51:02,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2025-03-16 17:51:02,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:02,479 INFO L225 Difference]: With dead ends: 70 [2025-03-16 17:51:02,479 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 17:51:02,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 97 SyntacticMatches, 29 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 17:51:02,480 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:02,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 17:51:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2025-03-16 17:51:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 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) [2025-03-16 17:51:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2025-03-16 17:51:02,482 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2025-03-16 17:51:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:02,482 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2025-03-16 17:51:02,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2025-03-16 17:51:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 17:51:02,483 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:02,483 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1] [2025-03-16 17:51:02,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-16 17:51:02,683 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 [2025-03-16 17:51:02,683 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:02,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 83839046, now seen corresponding path program 27 times [2025-03-16 17:51:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:02,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702464887] [2025-03-16 17:51:02,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:02,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:02,688 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 61 statements into 15 equivalence classes. [2025-03-16 17:51:02,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 17:51:02,701 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-16 17:51:02,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702464887] [2025-03-16 17:51:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702464887] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:03,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99637780] [2025-03-16 17:51:03,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:03,056 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:03,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-16 17:51:03,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 61 statements into 15 equivalence classes. [2025-03-16 17:51:03,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 17:51:03,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-03-16 17:51:03,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:03,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-16 17:51:03,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:03,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:03,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99637780] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:03,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:03,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 31 [2025-03-16 17:51:03,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676636247] [2025-03-16 17:51:03,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:03,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 17:51:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:03,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 17:51:03,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:51:03,420 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2025-03-16 17:51:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:03,508 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2025-03-16 17:51:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 17:51:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 61 [2025-03-16 17:51:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:03,508 INFO L225 Difference]: With dead ends: 111 [2025-03-16 17:51:03,509 INFO L226 Difference]: Without dead ends: 63 [2025-03-16 17:51:03,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 29 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:51:03,509 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:03,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-16 17:51:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2025-03-16 17:51:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 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) [2025-03-16 17:51:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2025-03-16 17:51:03,513 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 61 [2025-03-16 17:51:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:03,513 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2025-03-16 17:51:03,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2025-03-16 17:51:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2025-03-16 17:51:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 17:51:03,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:03,513 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2025-03-16 17:51:03,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:03,713 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 [2025-03-16 17:51:03,714 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:03,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -536041218, now seen corresponding path program 28 times [2025-03-16 17:51:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263819050] [2025-03-16 17:51:03,714 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:03,718 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-03-16 17:51:03,726 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 17:51:03,726 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:03,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:03,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263819050] [2025-03-16 17:51:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263819050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061765426] [2025-03-16 17:51:03,934 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:03,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:03,936 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:03,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-16 17:51:03,975 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 62 statements into 2 equivalence classes. [2025-03-16 17:51:03,992 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 17:51:03,992 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:03,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:03,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 17:51:03,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:04,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:04,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061765426] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:04,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:04,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 19 [2025-03-16 17:51:04,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550223140] [2025-03-16 17:51:04,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:04,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-16 17:51:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:04,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-16 17:51:04,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2025-03-16 17:51:04,247 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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) [2025-03-16 17:51:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:04,369 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2025-03-16 17:51:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-16 17:51:04,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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 62 [2025-03-16 17:51:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:04,370 INFO L225 Difference]: With dead ends: 74 [2025-03-16 17:51:04,370 INFO L226 Difference]: Without dead ends: 72 [2025-03-16 17:51:04,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 30 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=732, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 17:51:04,371 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:04,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-16 17:51:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2025-03-16 17:51:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 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) [2025-03-16 17:51:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2025-03-16 17:51:04,374 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2025-03-16 17:51:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:04,374 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2025-03-16 17:51:04,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 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) [2025-03-16 17:51:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2025-03-16 17:51:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 17:51:04,374 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:04,375 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1] [2025-03-16 17:51:04,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:04,575 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 [2025-03-16 17:51:04,575 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:04,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash -514649078, now seen corresponding path program 29 times [2025-03-16 17:51:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:04,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606938747] [2025-03-16 17:51:04,576 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:04,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:04,580 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 16 equivalence classes. [2025-03-16 17:51:04,588 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 17:51:04,588 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-16 17:51:04,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:04,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:04,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606938747] [2025-03-16 17:51:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606938747] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:04,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184772477] [2025-03-16 17:51:04,932 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:04,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:04,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:04,935 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) [2025-03-16 17:51:04,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-16 17:51:04,973 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 65 statements into 16 equivalence classes. [2025-03-16 17:51:04,995 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 17:51:04,995 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-16 17:51:04,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:04,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-16 17:51:04,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:05,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:05,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184772477] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:05,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:05,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 33 [2025-03-16 17:51:05,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493470203] [2025-03-16 17:51:05,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:05,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 17:51:05,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:05,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 17:51:05,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 17:51:05,335 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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) [2025-03-16 17:51:05,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:05,417 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2025-03-16 17:51:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-16 17:51:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 65 [2025-03-16 17:51:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:05,418 INFO L225 Difference]: With dead ends: 118 [2025-03-16 17:51:05,418 INFO L226 Difference]: Without dead ends: 67 [2025-03-16 17:51:05,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 98 SyntacticMatches, 31 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 17:51:05,419 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 108 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 [2025-03-16 17:51:05,419 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] [2025-03-16 17:51:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-16 17:51:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-03-16 17:51:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 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) [2025-03-16 17:51:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2025-03-16 17:51:05,421 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 65 [2025-03-16 17:51:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:05,421 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2025-03-16 17:51:05,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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) [2025-03-16 17:51:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2025-03-16 17:51:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-16 17:51:05,422 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:05,422 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2025-03-16 17:51:05,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-16 17:51:05,622 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 [2025-03-16 17:51:05,622 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:05,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1060022078, now seen corresponding path program 30 times [2025-03-16 17:51:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:05,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211621101] [2025-03-16 17:51:05,623 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:05,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:05,627 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 16 equivalence classes. [2025-03-16 17:51:05,635 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 17:51:05,635 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-16 17:51:05,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:05,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211621101] [2025-03-16 17:51:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211621101] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66746341] [2025-03-16 17:51:05,883 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:05,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:05,885 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:05,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-16 17:51:05,927 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 66 statements into 16 equivalence classes. [2025-03-16 17:51:05,956 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 66 of 66 statements. [2025-03-16 17:51:05,956 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-16 17:51:05,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:05,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-16 17:51:05,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:06,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66746341] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:06,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2025-03-16 17:51:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3915380] [2025-03-16 17:51:06,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:06,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 17:51:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:06,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 17:51:06,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2025-03-16 17:51:06,256 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2025-03-16 17:51:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:06,412 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2025-03-16 17:51:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 17:51:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 66 [2025-03-16 17:51:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:06,413 INFO L225 Difference]: With dead ends: 78 [2025-03-16 17:51:06,413 INFO L226 Difference]: Without dead ends: 76 [2025-03-16 17:51:06,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 112 SyntacticMatches, 32 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 17:51:06,413 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:06,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-16 17:51:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2025-03-16 17:51:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2025-03-16 17:51:06,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2025-03-16 17:51:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:06,422 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2025-03-16 17:51:06,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2025-03-16 17:51:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2025-03-16 17:51:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-16 17:51:06,422 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:06,422 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1] [2025-03-16 17:51:06,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:06,626 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 [2025-03-16 17:51:06,626 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:06,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1777671622, now seen corresponding path program 31 times [2025-03-16 17:51:06,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:06,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902527642] [2025-03-16 17:51:06,626 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:06,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 17:51:06,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 17:51:06,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:06,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902527642] [2025-03-16 17:51:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902527642] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569166305] [2025-03-16 17:51:07,062 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:07,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:07,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:07,064 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:07,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-16 17:51:07,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-16 17:51:07,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-16 17:51:07,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:07,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:07,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 17:51:07,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:07,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:07,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569166305] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:07,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:07,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 35 [2025-03-16 17:51:07,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668949936] [2025-03-16 17:51:07,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:07,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-16 17:51:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:07,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-16 17:51:07,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 17:51:07,451 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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) [2025-03-16 17:51:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:07,538 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2025-03-16 17:51:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-16 17:51:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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 69 [2025-03-16 17:51:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:07,539 INFO L225 Difference]: With dead ends: 125 [2025-03-16 17:51:07,539 INFO L226 Difference]: Without dead ends: 71 [2025-03-16 17:51:07,539 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 104 SyntacticMatches, 33 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2025-03-16 17:51:07,540 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:07,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-16 17:51:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2025-03-16 17:51:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 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) [2025-03-16 17:51:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2025-03-16 17:51:07,543 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2025-03-16 17:51:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:07,543 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2025-03-16 17:51:07,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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) [2025-03-16 17:51:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2025-03-16 17:51:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-16 17:51:07,544 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:07,544 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2025-03-16 17:51:07,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:07,748 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 [2025-03-16 17:51:07,748 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:07,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash 584205950, now seen corresponding path program 32 times [2025-03-16 17:51:07,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:07,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769205766] [2025-03-16 17:51:07,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:07,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:07,753 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 70 statements into 2 equivalence classes. [2025-03-16 17:51:07,757 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 17:51:07,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:07,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:08,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769205766] [2025-03-16 17:51:08,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769205766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933898611] [2025-03-16 17:51:08,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:08,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:08,010 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:08,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-16 17:51:08,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 70 statements into 2 equivalence classes. [2025-03-16 17:51:08,076 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-03-16 17:51:08,076 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:08,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:08,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-16 17:51:08,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:08,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:08,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933898611] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:08,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:08,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2025-03-16 17:51:08,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335872842] [2025-03-16 17:51:08,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:08,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 17:51:08,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:08,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 17:51:08,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2025-03-16 17:51:08,376 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 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) [2025-03-16 17:51:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:08,542 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2025-03-16 17:51:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-16 17:51:08,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 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 70 [2025-03-16 17:51:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:08,543 INFO L225 Difference]: With dead ends: 82 [2025-03-16 17:51:08,543 INFO L226 Difference]: Without dead ends: 80 [2025-03-16 17:51:08,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 118 SyntacticMatches, 35 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 17:51:08,543 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:08,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 25 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-16 17:51:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2025-03-16 17:51:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 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) [2025-03-16 17:51:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2025-03-16 17:51:08,546 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2025-03-16 17:51:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:08,547 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2025-03-16 17:51:08,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 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) [2025-03-16 17:51:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2025-03-16 17:51:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-16 17:51:08,547 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:08,547 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1] [2025-03-16 17:51:08,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-16 17:51:08,747 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 [2025-03-16 17:51:08,747 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:08,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 872842890, now seen corresponding path program 33 times [2025-03-16 17:51:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:08,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446180846] [2025-03-16 17:51:08,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:08,757 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 18 equivalence classes. [2025-03-16 17:51:08,766 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 73 of 73 statements. [2025-03-16 17:51:08,767 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-16 17:51:08,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446180846] [2025-03-16 17:51:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446180846] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202788762] [2025-03-16 17:51:09,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:09,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:09,141 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:09,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-16 17:51:09,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 73 statements into 18 equivalence classes. [2025-03-16 17:51:09,210 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 73 of 73 statements. [2025-03-16 17:51:09,210 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-16 17:51:09,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:09,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-16 17:51:09,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:09,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:09,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202788762] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:09,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:09,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 37 [2025-03-16 17:51:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681752905] [2025-03-16 17:51:09,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:09,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 17:51:09,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:09,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 17:51:09,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 17:51:09,550 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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) [2025-03-16 17:51:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:09,627 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2025-03-16 17:51:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-16 17:51:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 73 [2025-03-16 17:51:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:09,628 INFO L225 Difference]: With dead ends: 132 [2025-03-16 17:51:09,628 INFO L226 Difference]: Without dead ends: 75 [2025-03-16 17:51:09,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 110 SyntacticMatches, 35 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 17:51:09,628 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 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 [2025-03-16 17:51:09,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-16 17:51:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-03-16 17:51:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2025-03-16 17:51:09,631 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 73 [2025-03-16 17:51:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:09,631 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2025-03-16 17:51:09,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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) [2025-03-16 17:51:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2025-03-16 17:51:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-03-16 17:51:09,632 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:09,632 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2025-03-16 17:51:09,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:09,832 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 [2025-03-16 17:51:09,832 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:09,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1949340482, now seen corresponding path program 34 times [2025-03-16 17:51:09,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213523823] [2025-03-16 17:51:09,833 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:09,837 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 74 statements into 2 equivalence classes. [2025-03-16 17:51:09,843 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 17:51:09,843 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:09,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213523823] [2025-03-16 17:51:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213523823] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390150781] [2025-03-16 17:51:10,106 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:10,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:10,107 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:10,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-16 17:51:10,155 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 74 statements into 2 equivalence classes. [2025-03-16 17:51:10,176 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 74 of 74 statements. [2025-03-16 17:51:10,176 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:10,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:10,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 17:51:10,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:10,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:10,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390150781] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:10,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:10,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2025-03-16 17:51:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482763246] [2025-03-16 17:51:10,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:10,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 17:51:10,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:10,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 17:51:10,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2025-03-16 17:51:10,485 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:10,633 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2025-03-16 17:51:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-16 17:51:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2025-03-16 17:51:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:10,634 INFO L225 Difference]: With dead ends: 86 [2025-03-16 17:51:10,634 INFO L226 Difference]: Without dead ends: 84 [2025-03-16 17:51:10,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 36 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=629, Invalid=1011, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 17:51:10,635 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:10,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-16 17:51:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2025-03-16 17:51:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 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) [2025-03-16 17:51:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2025-03-16 17:51:10,640 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2025-03-16 17:51:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:10,640 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2025-03-16 17:51:10,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2025-03-16 17:51:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2025-03-16 17:51:10,641 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:10,641 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1] [2025-03-16 17:51:10,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-16 17:51:10,841 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 [2025-03-16 17:51:10,841 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:10,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash 550359878, now seen corresponding path program 35 times [2025-03-16 17:51:10,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:10,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256807346] [2025-03-16 17:51:10,842 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:10,848 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 19 equivalence classes. [2025-03-16 17:51:10,862 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) and asserted 77 of 77 statements. [2025-03-16 17:51:10,862 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2025-03-16 17:51:10,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:11,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:11,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256807346] [2025-03-16 17:51:11,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256807346] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:11,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418337586] [2025-03-16 17:51:11,310 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:11,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:11,312 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:11,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-03-16 17:51:11,359 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 77 statements into 19 equivalence classes. [2025-03-16 17:51:11,386 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) and asserted 77 of 77 statements. [2025-03-16 17:51:11,386 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2025-03-16 17:51:11,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:11,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-16 17:51:11,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:11,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418337586] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:11,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 39 [2025-03-16 17:51:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187380907] [2025-03-16 17:51:11,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:11,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 17:51:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:11,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 17:51:11,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 17:51:11,835 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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) [2025-03-16 17:51:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:11,926 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2025-03-16 17:51:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-16 17:51:11,926 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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 77 [2025-03-16 17:51:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:11,927 INFO L225 Difference]: With dead ends: 139 [2025-03-16 17:51:11,927 INFO L226 Difference]: Without dead ends: 79 [2025-03-16 17:51:11,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 116 SyntacticMatches, 37 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 17:51:11,927 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 105 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 [2025-03-16 17:51:11,928 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] [2025-03-16 17:51:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-16 17:51:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-03-16 17:51:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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) [2025-03-16 17:51:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2025-03-16 17:51:11,931 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 77 [2025-03-16 17:51:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:11,931 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2025-03-16 17:51:11,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 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) [2025-03-16 17:51:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2025-03-16 17:51:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2025-03-16 17:51:11,932 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:11,932 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2025-03-16 17:51:11,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-03-16 17:51:12,132 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 [2025-03-16 17:51:12,133 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:12,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:12,133 INFO L85 PathProgramCache]: Analyzing trace with hash -281885698, now seen corresponding path program 36 times [2025-03-16 17:51:12,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:12,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345297052] [2025-03-16 17:51:12,133 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:12,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:12,138 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 78 statements into 19 equivalence classes. [2025-03-16 17:51:12,147 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 17:51:12,147 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-16 17:51:12,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345297052] [2025-03-16 17:51:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345297052] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373815511] [2025-03-16 17:51:12,449 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:12,451 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:12,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-03-16 17:51:12,497 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 78 statements into 19 equivalence classes. [2025-03-16 17:51:12,525 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 78 of 78 statements. [2025-03-16 17:51:12,526 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-16 17:51:12,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:12,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 17:51:12,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:12,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373815511] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:12,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:12,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2025-03-16 17:51:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427080969] [2025-03-16 17:51:12,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:12,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 17:51:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:12,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 17:51:12,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2025-03-16 17:51:12,855 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 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) [2025-03-16 17:51:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:13,026 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2025-03-16 17:51:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-16 17:51:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 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 78 [2025-03-16 17:51:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:13,027 INFO L225 Difference]: With dead ends: 90 [2025-03-16 17:51:13,027 INFO L226 Difference]: Without dead ends: 88 [2025-03-16 17:51:13,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 133 SyntacticMatches, 38 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 17:51:13,028 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:13,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-16 17:51:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2025-03-16 17:51:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 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) [2025-03-16 17:51:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2025-03-16 17:51:13,033 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2025-03-16 17:51:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:13,033 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2025-03-16 17:51:13,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 24 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) [2025-03-16 17:51:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2025-03-16 17:51:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-16 17:51:13,033 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:13,033 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1] [2025-03-16 17:51:13,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-03-16 17:51:13,233 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 [2025-03-16 17:51:13,234 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:13,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash -994895606, now seen corresponding path program 37 times [2025-03-16 17:51:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726377688] [2025-03-16 17:51:13,234 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:13,239 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-16 17:51:13,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 17:51:13,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:13,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:13,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:13,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726377688] [2025-03-16 17:51:13,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726377688] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:13,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989358084] [2025-03-16 17:51:13,696 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:13,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:13,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:13,698 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-03-16 17:51:13,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-16 17:51:13,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 17:51:13,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:13,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:13,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 17:51:13,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:13,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:14,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989358084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:14,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:14,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 41 [2025-03-16 17:51:14,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034034789] [2025-03-16 17:51:14,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:14,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-16 17:51:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:14,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-16 17:51:14,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 17:51:14,199 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 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) [2025-03-16 17:51:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:14,304 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2025-03-16 17:51:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-16 17:51:14,305 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 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 81 [2025-03-16 17:51:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:14,305 INFO L225 Difference]: With dead ends: 146 [2025-03-16 17:51:14,305 INFO L226 Difference]: Without dead ends: 83 [2025-03-16 17:51:14,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 39 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 17:51:14,306 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:14,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-16 17:51:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-03-16 17:51:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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) [2025-03-16 17:51:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2025-03-16 17:51:14,309 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 81 [2025-03-16 17:51:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:14,309 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2025-03-16 17:51:14,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 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) [2025-03-16 17:51:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2025-03-16 17:51:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-16 17:51:14,310 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:14,311 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2025-03-16 17:51:14,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-03-16 17:51:14,511 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 [2025-03-16 17:51:14,511 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:14,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash 21032386, now seen corresponding path program 38 times [2025-03-16 17:51:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:14,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957467072] [2025-03-16 17:51:14,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:14,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 82 statements into 2 equivalence classes. [2025-03-16 17:51:14,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-16 17:51:14,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:14,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957467072] [2025-03-16 17:51:14,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957467072] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061487854] [2025-03-16 17:51:14,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:14,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:14,809 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:14,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-03-16 17:51:14,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 82 statements into 2 equivalence classes. [2025-03-16 17:51:14,881 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 82 of 82 statements. [2025-03-16 17:51:14,881 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:14,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:14,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-16 17:51:14,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:14,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061487854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:15,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:15,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2025-03-16 17:51:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809010775] [2025-03-16 17:51:15,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:15,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 17:51:15,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:15,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 17:51:15,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:51:15,271 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) [2025-03-16 17:51:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:15,455 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2025-03-16 17:51:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 17:51:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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 82 [2025-03-16 17:51:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:15,456 INFO L225 Difference]: With dead ends: 94 [2025-03-16 17:51:15,456 INFO L226 Difference]: Without dead ends: 92 [2025-03-16 17:51:15,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 139 SyntacticMatches, 41 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 17:51:15,457 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:15,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-16 17:51:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2025-03-16 17:51:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 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) [2025-03-16 17:51:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2025-03-16 17:51:15,461 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2025-03-16 17:51:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:15,461 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2025-03-16 17:51:15,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 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) [2025-03-16 17:51:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2025-03-16 17:51:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-16 17:51:15,461 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:15,462 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1] [2025-03-16 17:51:15,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-03-16 17:51:15,662 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 [2025-03-16 17:51:15,662 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:15,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash -488544058, now seen corresponding path program 39 times [2025-03-16 17:51:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:15,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498502872] [2025-03-16 17:51:15,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:15,667 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 85 statements into 21 equivalence classes. [2025-03-16 17:51:15,677 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 85 of 85 statements. [2025-03-16 17:51:15,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-16 17:51:15,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:16,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498502872] [2025-03-16 17:51:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498502872] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:16,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207864207] [2025-03-16 17:51:16,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:16,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:16,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:16,209 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:16,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-03-16 17:51:16,265 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 85 statements into 21 equivalence classes. [2025-03-16 17:51:16,298 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 85 of 85 statements. [2025-03-16 17:51:16,298 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-16 17:51:16,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:16,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 17:51:16,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:16,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:16,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207864207] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:16,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:16,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 43 [2025-03-16 17:51:16,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758736812] [2025-03-16 17:51:16,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:16,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-16 17:51:16,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:16,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-16 17:51:16,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 17:51:16,812 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 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) [2025-03-16 17:51:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:16,931 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2025-03-16 17:51:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 17:51:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 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 85 [2025-03-16 17:51:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:16,932 INFO L225 Difference]: With dead ends: 153 [2025-03-16 17:51:16,932 INFO L226 Difference]: Without dead ends: 87 [2025-03-16 17:51:16,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 128 SyntacticMatches, 41 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 17:51:16,932 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:16,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 208 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-16 17:51:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-03-16 17:51:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 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) [2025-03-16 17:51:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2025-03-16 17:51:16,938 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2025-03-16 17:51:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:16,938 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2025-03-16 17:51:16,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 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) [2025-03-16 17:51:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2025-03-16 17:51:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-03-16 17:51:16,938 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:16,938 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2025-03-16 17:51:16,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-03-16 17:51:17,139 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 [2025-03-16 17:51:17,139 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:17,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -964288130, now seen corresponding path program 40 times [2025-03-16 17:51:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:17,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478923450] [2025-03-16 17:51:17,139 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:17,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:17,154 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 86 statements into 2 equivalence classes. [2025-03-16 17:51:17,161 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-03-16 17:51:17,161 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:17,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:17,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:17,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478923450] [2025-03-16 17:51:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478923450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:17,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417673609] [2025-03-16 17:51:17,499 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:17,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:17,501 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:17,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-03-16 17:51:17,553 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 86 statements into 2 equivalence classes. [2025-03-16 17:51:17,578 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-03-16 17:51:17,578 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:17,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:17,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 17:51:17,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:17,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:17,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417673609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:17,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:17,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 25 [2025-03-16 17:51:17,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675362716] [2025-03-16 17:51:17,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:17,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 17:51:17,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:17,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 17:51:17,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2025-03-16 17:51:17,969 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 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) [2025-03-16 17:51:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:18,165 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2025-03-16 17:51:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-16 17:51:18,165 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 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 86 [2025-03-16 17:51:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:18,166 INFO L225 Difference]: With dead ends: 98 [2025-03-16 17:51:18,166 INFO L226 Difference]: Without dead ends: 96 [2025-03-16 17:51:18,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 148 SyntacticMatches, 42 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=827, Invalid=1335, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 17:51:18,166 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:18,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-16 17:51:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2025-03-16 17:51:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 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) [2025-03-16 17:51:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2025-03-16 17:51:18,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2025-03-16 17:51:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:18,174 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2025-03-16 17:51:18,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 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) [2025-03-16 17:51:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2025-03-16 17:51:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-16 17:51:18,174 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:18,174 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1] [2025-03-16 17:51:18,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-03-16 17:51:18,374 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 [2025-03-16 17:51:18,375 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:18,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1929431946, now seen corresponding path program 41 times [2025-03-16 17:51:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:18,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689756508] [2025-03-16 17:51:18,375 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:18,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:18,380 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 89 statements into 22 equivalence classes. [2025-03-16 17:51:18,401 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 89 of 89 statements. [2025-03-16 17:51:18,401 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-16 17:51:18,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689756508] [2025-03-16 17:51:18,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689756508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549884216] [2025-03-16 17:51:18,990 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:18,991 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:18,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-03-16 17:51:19,045 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 89 statements into 22 equivalence classes. [2025-03-16 17:51:19,078 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 89 of 89 statements. [2025-03-16 17:51:19,078 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-16 17:51:19,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:19,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-16 17:51:19,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:19,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:19,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549884216] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:19,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:19,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 45 [2025-03-16 17:51:19,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088272438] [2025-03-16 17:51:19,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:19,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 17:51:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:19,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 17:51:19,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 17:51:19,563 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 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) [2025-03-16 17:51:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:19,703 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2025-03-16 17:51:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-16 17:51:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 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 89 [2025-03-16 17:51:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:19,704 INFO L225 Difference]: With dead ends: 160 [2025-03-16 17:51:19,704 INFO L226 Difference]: Without dead ends: 91 [2025-03-16 17:51:19,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 134 SyntacticMatches, 43 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 17:51:19,705 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:19,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-16 17:51:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-03-16 17:51:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 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) [2025-03-16 17:51:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2025-03-16 17:51:19,709 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 89 [2025-03-16 17:51:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:19,709 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2025-03-16 17:51:19,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 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) [2025-03-16 17:51:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2025-03-16 17:51:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-16 17:51:19,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:19,709 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2025-03-16 17:51:19,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-03-16 17:51:19,910 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 [2025-03-16 17:51:19,910 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:19,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash 262826050, now seen corresponding path program 42 times [2025-03-16 17:51:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774138103] [2025-03-16 17:51:19,910 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:19,915 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 22 equivalence classes. [2025-03-16 17:51:19,926 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 17:51:19,927 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2025-03-16 17:51:19,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:20,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774138103] [2025-03-16 17:51:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774138103] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249112083] [2025-03-16 17:51:20,269 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:20,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:20,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:20,271 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:20,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-03-16 17:51:20,332 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 90 statements into 22 equivalence classes. [2025-03-16 17:51:20,366 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) and asserted 90 of 90 statements. [2025-03-16 17:51:20,367 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2025-03-16 17:51:20,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:20,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 17:51:20,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:20,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249112083] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:20,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2025-03-16 17:51:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421448230] [2025-03-16 17:51:20,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:20,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 17:51:20,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:20,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 17:51:20,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2025-03-16 17:51:20,825 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 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) [2025-03-16 17:51:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:21,021 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2025-03-16 17:51:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 17:51:21,021 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 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 90 [2025-03-16 17:51:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:21,022 INFO L225 Difference]: With dead ends: 102 [2025-03-16 17:51:21,022 INFO L226 Difference]: Without dead ends: 100 [2025-03-16 17:51:21,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 154 SyntacticMatches, 44 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 17:51:21,023 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:21,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-16 17:51:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2025-03-16 17:51:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 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) [2025-03-16 17:51:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2025-03-16 17:51:21,027 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2025-03-16 17:51:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:21,027 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2025-03-16 17:51:21,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 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) [2025-03-16 17:51:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2025-03-16 17:51:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-16 17:51:21,028 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:21,028 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1] [2025-03-16 17:51:21,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-03-16 17:51:21,228 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 [2025-03-16 17:51:21,228 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:21,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 126344774, now seen corresponding path program 43 times [2025-03-16 17:51:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725832119] [2025-03-16 17:51:21,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:21,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:21,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-03-16 17:51:21,240 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-03-16 17:51:21,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:21,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:21,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:21,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725832119] [2025-03-16 17:51:21,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725832119] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:21,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135332934] [2025-03-16 17:51:21,813 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:21,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:21,814 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:21,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-03-16 17:51:21,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-03-16 17:51:21,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-03-16 17:51:21,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:21,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:21,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 17:51:21,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:21,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:22,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135332934] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:22,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:22,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 47 [2025-03-16 17:51:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324767857] [2025-03-16 17:51:22,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:22,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-16 17:51:22,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:22,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-16 17:51:22,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 17:51:22,462 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 47 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) [2025-03-16 17:51:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:22,629 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2025-03-16 17:51:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 17:51:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 47 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 93 [2025-03-16 17:51:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:22,630 INFO L225 Difference]: With dead ends: 167 [2025-03-16 17:51:22,630 INFO L226 Difference]: Without dead ends: 95 [2025-03-16 17:51:22,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 140 SyntacticMatches, 45 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 17:51:22,631 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:22,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 204 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-16 17:51:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2025-03-16 17:51:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 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) [2025-03-16 17:51:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2025-03-16 17:51:22,636 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 93 [2025-03-16 17:51:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:22,636 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2025-03-16 17:51:22,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 47 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) [2025-03-16 17:51:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2025-03-16 17:51:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-16 17:51:22,637 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:22,637 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2025-03-16 17:51:22,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-03-16 17:51:22,837 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 [2025-03-16 17:51:22,838 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:22,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash -937140482, now seen corresponding path program 44 times [2025-03-16 17:51:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467826043] [2025-03-16 17:51:22,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:22,845 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes. [2025-03-16 17:51:22,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-03-16 17:51:22,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:22,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:23,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467826043] [2025-03-16 17:51:23,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467826043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689204249] [2025-03-16 17:51:23,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:23,223 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) [2025-03-16 17:51:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-03-16 17:51:23,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes. [2025-03-16 17:51:23,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 94 of 94 statements. [2025-03-16 17:51:23,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:23,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:23,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-16 17:51:23,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:23,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689204249] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:23,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2025-03-16 17:51:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884630139] [2025-03-16 17:51:23,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:23,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 17:51:23,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:23,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 17:51:23,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2025-03-16 17:51:23,759 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 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) [2025-03-16 17:51:23,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:23,979 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2025-03-16 17:51:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-16 17:51:23,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 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 94 [2025-03-16 17:51:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:23,980 INFO L225 Difference]: With dead ends: 106 [2025-03-16 17:51:23,980 INFO L226 Difference]: Without dead ends: 104 [2025-03-16 17:51:23,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 160 SyntacticMatches, 47 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2025-03-16 17:51:23,981 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:23,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-16 17:51:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2025-03-16 17:51:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 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) [2025-03-16 17:51:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2025-03-16 17:51:23,985 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2025-03-16 17:51:23,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:23,985 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2025-03-16 17:51:23,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 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) [2025-03-16 17:51:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2025-03-16 17:51:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-16 17:51:23,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:23,985 INFO L218 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1] [2025-03-16 17:51:23,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-03-16 17:51:24,186 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 [2025-03-16 17:51:24,186 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:24,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1063805430, now seen corresponding path program 45 times [2025-03-16 17:51:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:24,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838485091] [2025-03-16 17:51:24,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:24,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 24 equivalence classes. [2025-03-16 17:51:24,202 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 97 of 97 statements. [2025-03-16 17:51:24,202 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-03-16 17:51:24,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838485091] [2025-03-16 17:51:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838485091] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809082320] [2025-03-16 17:51:24,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:24,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:24,847 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:24,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-03-16 17:51:24,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 24 equivalence classes. [2025-03-16 17:51:24,961 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) and asserted 97 of 97 statements. [2025-03-16 17:51:24,961 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2025-03-16 17:51:24,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:24,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 17:51:24,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:25,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:25,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809082320] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:25,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:25,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 49 [2025-03-16 17:51:25,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089047982] [2025-03-16 17:51:25,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:25,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-16 17:51:25,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:25,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-16 17:51:25,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 17:51:25,532 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:25,665 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2025-03-16 17:51:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-16 17:51:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2025-03-16 17:51:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:25,667 INFO L225 Difference]: With dead ends: 174 [2025-03-16 17:51:25,667 INFO L226 Difference]: Without dead ends: 99 [2025-03-16 17:51:25,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 146 SyntacticMatches, 47 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 17:51:25,667 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:25,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-16 17:51:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2025-03-16 17:51:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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) [2025-03-16 17:51:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2025-03-16 17:51:25,671 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2025-03-16 17:51:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:25,671 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2025-03-16 17:51:25,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2025-03-16 17:51:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-16 17:51:25,672 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:25,672 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2025-03-16 17:51:25,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:25,872 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 [2025-03-16 17:51:25,872 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:25,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash -384499006, now seen corresponding path program 46 times [2025-03-16 17:51:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:25,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265025602] [2025-03-16 17:51:25,873 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:25,881 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 98 statements into 2 equivalence classes. [2025-03-16 17:51:25,890 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 17:51:25,890 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:25,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:26,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265025602] [2025-03-16 17:51:26,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265025602] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470396107] [2025-03-16 17:51:26,265 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:26,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:26,267 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:26,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-03-16 17:51:26,330 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 98 statements into 2 equivalence classes. [2025-03-16 17:51:26,357 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 98 of 98 statements. [2025-03-16 17:51:26,357 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:26,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:26,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-16 17:51:26,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:26,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470396107] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:26,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2025-03-16 17:51:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130919476] [2025-03-16 17:51:26,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:26,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-16 17:51:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:26,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-16 17:51:26,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2025-03-16 17:51:26,821 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 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) [2025-03-16 17:51:27,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:27,025 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2025-03-16 17:51:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-16 17:51:27,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 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 98 [2025-03-16 17:51:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:27,026 INFO L225 Difference]: With dead ends: 110 [2025-03-16 17:51:27,026 INFO L226 Difference]: Without dead ends: 108 [2025-03-16 17:51:27,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 169 SyntacticMatches, 48 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1052, Invalid=1704, Unknown=0, NotChecked=0, Total=2756 [2025-03-16 17:51:27,026 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:27,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 13 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-16 17:51:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2025-03-16 17:51:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2025-03-16 17:51:27,034 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2025-03-16 17:51:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:27,034 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2025-03-16 17:51:27,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 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) [2025-03-16 17:51:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2025-03-16 17:51:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-03-16 17:51:27,034 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:27,034 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1] [2025-03-16 17:51:27,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:27,235 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 [2025-03-16 17:51:27,235 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:27,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash 68760518, now seen corresponding path program 47 times [2025-03-16 17:51:27,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:27,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829029504] [2025-03-16 17:51:27,235 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:27,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:27,241 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 101 statements into 25 equivalence classes. [2025-03-16 17:51:27,253 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) and asserted 101 of 101 statements. [2025-03-16 17:51:27,254 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2025-03-16 17:51:27,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:27,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829029504] [2025-03-16 17:51:27,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829029504] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:27,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87483218] [2025-03-16 17:51:27,938 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:27,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:27,940 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:27,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-03-16 17:51:28,005 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 101 statements into 25 equivalence classes. [2025-03-16 17:51:28,043 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) and asserted 101 of 101 statements. [2025-03-16 17:51:28,043 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2025-03-16 17:51:28,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:28,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-16 17:51:28,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:28,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:28,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87483218] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:28,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:28,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 51 [2025-03-16 17:51:28,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331682321] [2025-03-16 17:51:28,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:28,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-16 17:51:28,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:28,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-16 17:51:28,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2025-03-16 17:51:28,640 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 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) [2025-03-16 17:51:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:28,770 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2025-03-16 17:51:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-16 17:51:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 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 101 [2025-03-16 17:51:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:28,771 INFO L225 Difference]: With dead ends: 181 [2025-03-16 17:51:28,771 INFO L226 Difference]: Without dead ends: 103 [2025-03-16 17:51:28,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 152 SyntacticMatches, 49 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2025-03-16 17:51:28,772 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:28,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-16 17:51:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2025-03-16 17:51:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 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) [2025-03-16 17:51:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2025-03-16 17:51:28,776 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 101 [2025-03-16 17:51:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:28,776 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2025-03-16 17:51:28,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 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) [2025-03-16 17:51:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2025-03-16 17:51:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-16 17:51:28,777 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:28,777 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2025-03-16 17:51:28,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-03-16 17:51:28,978 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 [2025-03-16 17:51:28,978 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:28,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash 828734590, now seen corresponding path program 48 times [2025-03-16 17:51:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:28,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107293853] [2025-03-16 17:51:28,978 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:28,984 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 102 statements into 25 equivalence classes. [2025-03-16 17:51:28,995 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) and asserted 102 of 102 statements. [2025-03-16 17:51:28,995 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2025-03-16 17:51:28,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107293853] [2025-03-16 17:51:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107293853] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145481264] [2025-03-16 17:51:29,392 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:29,394 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:29,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-03-16 17:51:29,459 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 102 statements into 25 equivalence classes. [2025-03-16 17:51:29,499 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) and asserted 102 of 102 statements. [2025-03-16 17:51:29,499 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2025-03-16 17:51:29,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:29,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-16 17:51:29,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:29,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145481264] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:30,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2025-03-16 17:51:30,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542202469] [2025-03-16 17:51:30,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:30,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 17:51:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:30,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 17:51:30,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2025-03-16 17:51:30,023 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 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) [2025-03-16 17:51:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:30,298 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2025-03-16 17:51:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-16 17:51:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 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 102 [2025-03-16 17:51:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:30,299 INFO L225 Difference]: With dead ends: 114 [2025-03-16 17:51:30,299 INFO L226 Difference]: Without dead ends: 112 [2025-03-16 17:51:30,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 175 SyntacticMatches, 50 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1136, Invalid=1944, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 17:51:30,300 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:30,300 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-16 17:51:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2025-03-16 17:51:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 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) [2025-03-16 17:51:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2025-03-16 17:51:30,304 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 102 [2025-03-16 17:51:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:30,305 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2025-03-16 17:51:30,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 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) [2025-03-16 17:51:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2025-03-16 17:51:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-16 17:51:30,305 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:30,305 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1] [2025-03-16 17:51:30,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-03-16 17:51:30,505 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 [2025-03-16 17:51:30,505 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:30,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1361023114, now seen corresponding path program 49 times [2025-03-16 17:51:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:30,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004780709] [2025-03-16 17:51:30,506 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:30,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:30,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 105 statements into 1 equivalence classes. [2025-03-16 17:51:30,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 105 of 105 statements. [2025-03-16 17:51:30,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:30,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:31,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004780709] [2025-03-16 17:51:31,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004780709] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065620498] [2025-03-16 17:51:31,254 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:31,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:31,256 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:31,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-03-16 17:51:31,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 105 statements into 1 equivalence classes. [2025-03-16 17:51:31,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 105 of 105 statements. [2025-03-16 17:51:31,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:31,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:31,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-03-16 17:51:31,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:31,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:32,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065620498] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:32,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:32,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 53 [2025-03-16 17:51:32,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566732871] [2025-03-16 17:51:32,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:32,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-16 17:51:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:32,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-16 17:51:32,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2025-03-16 17:51:32,084 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 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) [2025-03-16 17:51:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:32,263 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2025-03-16 17:51:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2025-03-16 17:51:32,263 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 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 105 [2025-03-16 17:51:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:32,264 INFO L225 Difference]: With dead ends: 188 [2025-03-16 17:51:32,264 INFO L226 Difference]: Without dead ends: 107 [2025-03-16 17:51:32,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 158 SyntacticMatches, 51 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2025-03-16 17:51:32,265 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:32,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 251 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:51:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-16 17:51:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2025-03-16 17:51:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2025-03-16 17:51:32,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 105 [2025-03-16 17:51:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:32,270 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2025-03-16 17:51:32,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 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) [2025-03-16 17:51:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2025-03-16 17:51:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-16 17:51:32,270 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:32,270 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2025-03-16 17:51:32,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-03-16 17:51:32,471 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 [2025-03-16 17:51:32,472 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:32,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -114770622, now seen corresponding path program 50 times [2025-03-16 17:51:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:32,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967802386] [2025-03-16 17:51:32,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:32,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 106 statements into 2 equivalence classes. [2025-03-16 17:51:32,486 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 106 of 106 statements. [2025-03-16 17:51:32,486 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:32,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967802386] [2025-03-16 17:51:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967802386] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124775749] [2025-03-16 17:51:32,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:32,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:32,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:32,916 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:32,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-03-16 17:51:32,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 106 statements into 2 equivalence classes. [2025-03-16 17:51:33,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 106 of 106 statements. [2025-03-16 17:51:33,013 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:33,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:33,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-16 17:51:33,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:33,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:33,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124775749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:33,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:33,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2025-03-16 17:51:33,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209222676] [2025-03-16 17:51:33,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:33,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 17:51:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:33,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 17:51:33,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:51:33,564 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 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) [2025-03-16 17:51:33,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:33,809 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2025-03-16 17:51:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-16 17:51:33,810 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 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 106 [2025-03-16 17:51:33,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:33,810 INFO L225 Difference]: With dead ends: 118 [2025-03-16 17:51:33,810 INFO L226 Difference]: Without dead ends: 116 [2025-03-16 17:51:33,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 181 SyntacticMatches, 53 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 17:51:33,811 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:33,811 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-16 17:51:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2025-03-16 17:51:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 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) [2025-03-16 17:51:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2025-03-16 17:51:33,816 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2025-03-16 17:51:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:33,817 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2025-03-16 17:51:33,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 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) [2025-03-16 17:51:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2025-03-16 17:51:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-03-16 17:51:33,817 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:33,817 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1] [2025-03-16 17:51:33,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-03-16 17:51:34,017 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 [2025-03-16 17:51:34,018 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:34,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash -336762554, now seen corresponding path program 51 times [2025-03-16 17:51:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:34,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653861892] [2025-03-16 17:51:34,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:34,023 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 27 equivalence classes. [2025-03-16 17:51:34,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 109 of 109 statements. [2025-03-16 17:51:34,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-03-16 17:51:34,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:34,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:34,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653861892] [2025-03-16 17:51:34,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653861892] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:34,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352756565] [2025-03-16 17:51:34,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:34,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:34,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:34,824 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:34,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-03-16 17:51:34,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 27 equivalence classes. [2025-03-16 17:51:34,940 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 109 of 109 statements. [2025-03-16 17:51:34,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-03-16 17:51:34,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:34,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-16 17:51:34,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:35,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:35,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352756565] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:35,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:35,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 55 [2025-03-16 17:51:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827685557] [2025-03-16 17:51:35,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:35,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-16 17:51:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:35,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-16 17:51:35,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 17:51:35,664 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 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) [2025-03-16 17:51:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:35,856 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2025-03-16 17:51:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-16 17:51:35,857 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 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 109 [2025-03-16 17:51:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:35,858 INFO L225 Difference]: With dead ends: 195 [2025-03-16 17:51:35,858 INFO L226 Difference]: Without dead ends: 111 [2025-03-16 17:51:35,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 164 SyntacticMatches, 53 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 17:51:35,858 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:35,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 252 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:51:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-16 17:51:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2025-03-16 17:51:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 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) [2025-03-16 17:51:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2025-03-16 17:51:35,868 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 109 [2025-03-16 17:51:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:35,868 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2025-03-16 17:51:35,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 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) [2025-03-16 17:51:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2025-03-16 17:51:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-16 17:51:35,869 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:35,869 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2025-03-16 17:51:35,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-03-16 17:51:36,069 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 [2025-03-16 17:51:36,070 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:36,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash -576620034, now seen corresponding path program 52 times [2025-03-16 17:51:36,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:36,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924056818] [2025-03-16 17:51:36,070 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:36,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:36,079 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 110 statements into 2 equivalence classes. [2025-03-16 17:51:36,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 17:51:36,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:36,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:36,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:36,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924056818] [2025-03-16 17:51:36,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924056818] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:36,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050676476] [2025-03-16 17:51:36,551 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:36,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:36,553 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) [2025-03-16 17:51:36,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-03-16 17:51:36,626 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 110 statements into 2 equivalence classes. [2025-03-16 17:51:36,657 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 110 of 110 statements. [2025-03-16 17:51:36,658 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:36,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:36,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-16 17:51:36,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:36,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050676476] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:37,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 31 [2025-03-16 17:51:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570633485] [2025-03-16 17:51:37,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:37,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 17:51:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:37,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 17:51:37,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:51:37,221 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 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) [2025-03-16 17:51:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:37,475 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2025-03-16 17:51:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-16 17:51:37,476 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 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 110 [2025-03-16 17:51:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:37,476 INFO L225 Difference]: With dead ends: 122 [2025-03-16 17:51:37,476 INFO L226 Difference]: Without dead ends: 120 [2025-03-16 17:51:37,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 189 SyntacticMatches, 55 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2025-03-16 17:51:37,477 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:37,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-16 17:51:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2025-03-16 17:51:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2025-03-16 17:51:37,482 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2025-03-16 17:51:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:37,482 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2025-03-16 17:51:37,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 31 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) [2025-03-16 17:51:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2025-03-16 17:51:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-16 17:51:37,483 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:37,483 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1] [2025-03-16 17:51:37,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-03-16 17:51:37,683 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 [2025-03-16 17:51:37,683 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:37,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1782620938, now seen corresponding path program 53 times [2025-03-16 17:51:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:37,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172596956] [2025-03-16 17:51:37,684 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:37,690 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 113 statements into 28 equivalence classes. [2025-03-16 17:51:37,704 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) and asserted 113 of 113 statements. [2025-03-16 17:51:37,704 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2025-03-16 17:51:37,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:38,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:38,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172596956] [2025-03-16 17:51:38,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172596956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:38,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171368877] [2025-03-16 17:51:38,548 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:38,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:38,550 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) [2025-03-16 17:51:38,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-03-16 17:51:38,626 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 113 statements into 28 equivalence classes. [2025-03-16 17:51:38,670 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) and asserted 113 of 113 statements. [2025-03-16 17:51:38,670 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2025-03-16 17:51:38,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:38,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-16 17:51:38,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:38,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171368877] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:39,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:39,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 57 [2025-03-16 17:51:39,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406386726] [2025-03-16 17:51:39,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:39,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-03-16 17:51:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:39,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-03-16 17:51:39,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 17:51:39,438 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 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) [2025-03-16 17:51:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:39,648 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2025-03-16 17:51:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-16 17:51:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 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 113 [2025-03-16 17:51:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:39,649 INFO L225 Difference]: With dead ends: 202 [2025-03-16 17:51:39,649 INFO L226 Difference]: Without dead ends: 115 [2025-03-16 17:51:39,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 170 SyntacticMatches, 55 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 17:51:39,649 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:39,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 375 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:51:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-16 17:51:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2025-03-16 17:51:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 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) [2025-03-16 17:51:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2025-03-16 17:51:39,654 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 113 [2025-03-16 17:51:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:39,654 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2025-03-16 17:51:39,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 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) [2025-03-16 17:51:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2025-03-16 17:51:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2025-03-16 17:51:39,655 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:39,655 INFO L218 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2025-03-16 17:51:39,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:39,855 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 [2025-03-16 17:51:39,855 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:39,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1301125058, now seen corresponding path program 54 times [2025-03-16 17:51:39,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:39,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391605190] [2025-03-16 17:51:39,856 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:39,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:39,861 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 114 statements into 28 equivalence classes. [2025-03-16 17:51:39,875 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) and asserted 114 of 114 statements. [2025-03-16 17:51:39,875 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2025-03-16 17:51:39,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:40,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391605190] [2025-03-16 17:51:40,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391605190] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69750571] [2025-03-16 17:51:40,392 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:40,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:40,393 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) [2025-03-16 17:51:40,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-03-16 17:51:40,470 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 114 statements into 28 equivalence classes. [2025-03-16 17:51:40,517 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) and asserted 114 of 114 statements. [2025-03-16 17:51:40,517 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2025-03-16 17:51:40,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:40,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-16 17:51:40,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:40,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:41,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69750571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:41,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2025-03-16 17:51:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402248932] [2025-03-16 17:51:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:41,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 17:51:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:41,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 17:51:41,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 17:51:41,117 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:41,399 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2025-03-16 17:51:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-16 17:51:41,400 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 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 114 [2025-03-16 17:51:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:41,401 INFO L225 Difference]: With dead ends: 126 [2025-03-16 17:51:41,401 INFO L226 Difference]: Without dead ends: 124 [2025-03-16 17:51:41,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 196 SyntacticMatches, 56 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1397, Invalid=2385, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 17:51:41,401 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:41,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-16 17:51:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2025-03-16 17:51:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2025-03-16 17:51:41,407 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2025-03-16 17:51:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:41,407 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2025-03-16 17:51:41,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2025-03-16 17:51:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2025-03-16 17:51:41,407 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:41,407 INFO L218 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1] [2025-03-16 17:51:41,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-03-16 17:51:41,608 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 [2025-03-16 17:51:41,608 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:41,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash -262373690, now seen corresponding path program 55 times [2025-03-16 17:51:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608629128] [2025-03-16 17:51:41,609 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:41,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-16 17:51:41,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-16 17:51:41,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:41,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:42,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:42,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608629128] [2025-03-16 17:51:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608629128] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920051098] [2025-03-16 17:51:42,546 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:42,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:42,547 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) [2025-03-16 17:51:42,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2025-03-16 17:51:42,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 117 statements into 1 equivalence classes. [2025-03-16 17:51:42,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 117 of 117 statements. [2025-03-16 17:51:42,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:42,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:42,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-16 17:51:42,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:42,753 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920051098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:43,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:43,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 59 [2025-03-16 17:51:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079467989] [2025-03-16 17:51:43,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:43,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-03-16 17:51:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:43,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-03-16 17:51:43,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 17:51:43,458 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 59 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) [2025-03-16 17:51:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:43,635 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2025-03-16 17:51:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-16 17:51:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 59 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 117 [2025-03-16 17:51:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:43,635 INFO L225 Difference]: With dead ends: 209 [2025-03-16 17:51:43,636 INFO L226 Difference]: Without dead ends: 119 [2025-03-16 17:51:43,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 176 SyntacticMatches, 57 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2025-03-16 17:51:43,636 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:43,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 292 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-16 17:51:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2025-03-16 17:51:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2025-03-16 17:51:43,642 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 117 [2025-03-16 17:51:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:43,642 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2025-03-16 17:51:43,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 59 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) [2025-03-16 17:51:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2025-03-16 17:51:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-16 17:51:43,642 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:43,642 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2025-03-16 17:51:43,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2025-03-16 17:51:43,843 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 [2025-03-16 17:51:43,843 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:43,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -969910402, now seen corresponding path program 56 times [2025-03-16 17:51:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:43,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343142650] [2025-03-16 17:51:43,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:43,849 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-03-16 17:51:43,859 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 17:51:43,859 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:43,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:44,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:44,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343142650] [2025-03-16 17:51:44,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343142650] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:44,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731771070] [2025-03-16 17:51:44,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:44,394 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) [2025-03-16 17:51:44,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2025-03-16 17:51:44,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 118 statements into 2 equivalence classes. [2025-03-16 17:51:44,508 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 118 of 118 statements. [2025-03-16 17:51:44,508 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:44,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:44,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-16 17:51:44,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:44,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731771070] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:45,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2025-03-16 17:51:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352191467] [2025-03-16 17:51:45,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:45,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 17:51:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:45,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 17:51:45,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 17:51:45,132 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:45,409 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2025-03-16 17:51:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-03-16 17:51:45,409 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 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 118 [2025-03-16 17:51:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:45,410 INFO L225 Difference]: With dead ends: 130 [2025-03-16 17:51:45,410 INFO L226 Difference]: Without dead ends: 128 [2025-03-16 17:51:45,410 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 202 SyntacticMatches, 59 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1490, Invalid=2542, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 17:51:45,411 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:45,411 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-16 17:51:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2025-03-16 17:51:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2025-03-16 17:51:45,416 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 118 [2025-03-16 17:51:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:45,416 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2025-03-16 17:51:45,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2025-03-16 17:51:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-16 17:51:45,417 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:45,417 INFO L218 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1] [2025-03-16 17:51:45,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2025-03-16 17:51:45,617 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 [2025-03-16 17:51:45,617 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:45,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1940051338, now seen corresponding path program 57 times [2025-03-16 17:51:45,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:45,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724921554] [2025-03-16 17:51:45,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:45,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 121 statements into 30 equivalence classes. [2025-03-16 17:51:45,637 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) and asserted 121 of 121 statements. [2025-03-16 17:51:45,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2025-03-16 17:51:45,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:46,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:46,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724921554] [2025-03-16 17:51:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724921554] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348537758] [2025-03-16 17:51:46,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:46,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:46,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:46,634 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) [2025-03-16 17:51:46,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2025-03-16 17:51:46,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 121 statements into 30 equivalence classes. [2025-03-16 17:51:46,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) and asserted 121 of 121 statements. [2025-03-16 17:51:46,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2025-03-16 17:51:46,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:46,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-16 17:51:46,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:46,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348537758] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:47,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:47,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2025-03-16 17:51:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450757382] [2025-03-16 17:51:47,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:47,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2025-03-16 17:51:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:47,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2025-03-16 17:51:47,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 17:51:47,667 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:47,869 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2025-03-16 17:51:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-03-16 17:51:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2025-03-16 17:51:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:47,870 INFO L225 Difference]: With dead ends: 216 [2025-03-16 17:51:47,870 INFO L226 Difference]: Without dead ends: 123 [2025-03-16 17:51:47,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 182 SyntacticMatches, 59 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2025-03-16 17:51:47,870 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:47,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 293 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:51:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-16 17:51:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2025-03-16 17:51:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2025-03-16 17:51:47,876 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 121 [2025-03-16 17:51:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:47,876 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2025-03-16 17:51:47,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2025-03-16 17:51:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2025-03-16 17:51:47,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:47,876 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2025-03-16 17:51:47,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2025-03-16 17:51:48,077 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 [2025-03-16 17:51:48,077 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:48,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 367759938, now seen corresponding path program 58 times [2025-03-16 17:51:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:48,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913172556] [2025-03-16 17:51:48,077 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:48,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:48,083 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 122 statements into 2 equivalence classes. [2025-03-16 17:51:48,096 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 122 of 122 statements. [2025-03-16 17:51:48,096 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:48,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:48,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913172556] [2025-03-16 17:51:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913172556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:48,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579983552] [2025-03-16 17:51:48,648 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:48,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:48,650 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) [2025-03-16 17:51:48,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2025-03-16 17:51:48,742 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 122 statements into 2 equivalence classes. [2025-03-16 17:51:48,776 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 122 of 122 statements. [2025-03-16 17:51:48,777 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:48,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:48,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-16 17:51:48,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:48,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:49,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579983552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:49,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:49,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2025-03-16 17:51:49,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102533653] [2025-03-16 17:51:49,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:49,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 17:51:49,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:49,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 17:51:49,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 17:51:49,440 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 34 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:49,722 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2025-03-16 17:51:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-16 17:51:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 34 states have internal predecessors, (124), 0 states have call successors, (0), 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 122 [2025-03-16 17:51:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:49,723 INFO L225 Difference]: With dead ends: 134 [2025-03-16 17:51:49,723 INFO L226 Difference]: Without dead ends: 132 [2025-03-16 17:51:49,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 211 SyntacticMatches, 60 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1583, Invalid=2577, Unknown=0, NotChecked=0, Total=4160 [2025-03-16 17:51:49,724 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:49,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-16 17:51:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2025-03-16 17:51:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2025-03-16 17:51:49,730 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2025-03-16 17:51:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:49,730 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2025-03-16 17:51:49,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 34 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2025-03-16 17:51:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-03-16 17:51:49,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:49,730 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1] [2025-03-16 17:51:49,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2025-03-16 17:51:49,930 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 [2025-03-16 17:51:49,931 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:49,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash -524389306, now seen corresponding path program 59 times [2025-03-16 17:51:49,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:49,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800148308] [2025-03-16 17:51:49,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:49,937 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 125 statements into 31 equivalence classes. [2025-03-16 17:51:49,954 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) and asserted 125 of 125 statements. [2025-03-16 17:51:49,954 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2025-03-16 17:51:49,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800148308] [2025-03-16 17:51:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800148308] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474755448] [2025-03-16 17:51:51,002 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:51,004 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) [2025-03-16 17:51:51,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2025-03-16 17:51:51,090 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 125 statements into 31 equivalence classes. [2025-03-16 17:51:51,140 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) and asserted 125 of 125 statements. [2025-03-16 17:51:51,140 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2025-03-16 17:51:51,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:51,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-16 17:51:51,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:51,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474755448] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:52,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 63 [2025-03-16 17:51:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632622144] [2025-03-16 17:51:52,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:52,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-16 17:51:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:52,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-16 17:51:52,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 17:51:52,018 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 63 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) [2025-03-16 17:51:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:52,141 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2025-03-16 17:51:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-03-16 17:51:52,142 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 63 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 125 [2025-03-16 17:51:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:52,142 INFO L225 Difference]: With dead ends: 223 [2025-03-16 17:51:52,142 INFO L226 Difference]: Without dead ends: 127 [2025-03-16 17:51:52,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 188 SyntacticMatches, 61 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 17:51:52,143 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:52,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-16 17:51:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2025-03-16 17:51:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2025-03-16 17:51:52,149 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 125 [2025-03-16 17:51:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:52,149 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2025-03-16 17:51:52,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 63 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) [2025-03-16 17:51:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2025-03-16 17:51:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2025-03-16 17:51:52,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:52,149 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2025-03-16 17:51:52,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2025-03-16 17:51:52,350 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 [2025-03-16 17:51:52,350 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:52,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2106977026, now seen corresponding path program 60 times [2025-03-16 17:51:52,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:52,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155262260] [2025-03-16 17:51:52,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:52,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:52,357 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 126 statements into 31 equivalence classes. [2025-03-16 17:51:52,373 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) and asserted 126 of 126 statements. [2025-03-16 17:51:52,373 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2025-03-16 17:51:52,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:52,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155262260] [2025-03-16 17:51:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155262260] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184314546] [2025-03-16 17:51:52,989 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:52,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:52,991 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) [2025-03-16 17:51:52,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2025-03-16 17:51:53,081 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 126 statements into 31 equivalence classes. [2025-03-16 17:51:53,133 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) and asserted 126 of 126 statements. [2025-03-16 17:51:53,133 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2025-03-16 17:51:53,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:53,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-03-16 17:51:53,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:53,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184314546] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:53,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:53,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2025-03-16 17:51:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986627205] [2025-03-16 17:51:53,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:53,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-16 17:51:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:53,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-16 17:51:53,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 17:51:53,827 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:54,146 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2025-03-16 17:51:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-16 17:51:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 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 126 [2025-03-16 17:51:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:54,148 INFO L225 Difference]: With dead ends: 138 [2025-03-16 17:51:54,148 INFO L226 Difference]: Without dead ends: 136 [2025-03-16 17:51:54,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 217 SyntacticMatches, 62 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1685, Invalid=2871, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 17:51:54,148 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:54,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-16 17:51:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2025-03-16 17:51:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2025-03-16 17:51:54,155 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 126 [2025-03-16 17:51:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:54,155 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2025-03-16 17:51:54,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 36 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2025-03-16 17:51:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-03-16 17:51:54,155 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:54,155 INFO L218 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1] [2025-03-16 17:51:54,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2025-03-16 17:51:54,356 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 [2025-03-16 17:51:54,356 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:54,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1995319306, now seen corresponding path program 61 times [2025-03-16 17:51:54,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:54,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924986374] [2025-03-16 17:51:54,356 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:54,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:54,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 129 statements into 1 equivalence classes. [2025-03-16 17:51:54,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 129 of 129 statements. [2025-03-16 17:51:54,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:54,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:55,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:55,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924986374] [2025-03-16 17:51:55,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924986374] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:55,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640092067] [2025-03-16 17:51:55,513 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:55,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:55,515 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) [2025-03-16 17:51:55,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2025-03-16 17:51:55,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 129 statements into 1 equivalence classes. [2025-03-16 17:51:55,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 129 of 129 statements. [2025-03-16 17:51:55,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:55,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:55,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-16 17:51:55,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:55,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640092067] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:56,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:56,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 65 [2025-03-16 17:51:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259865857] [2025-03-16 17:51:56,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:56,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2025-03-16 17:51:56,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:56,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2025-03-16 17:51:56,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2025-03-16 17:51:56,595 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:56,778 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2025-03-16 17:51:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-16 17:51:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2025-03-16 17:51:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:56,779 INFO L225 Difference]: With dead ends: 230 [2025-03-16 17:51:56,779 INFO L226 Difference]: Without dead ends: 131 [2025-03-16 17:51:56,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 194 SyntacticMatches, 63 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2025-03-16 17:51:56,780 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:56,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 299 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-03-16 17:51:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2025-03-16 17:51:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2025-03-16 17:51:56,786 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 129 [2025-03-16 17:51:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:56,786 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2025-03-16 17:51:56,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2025-03-16 17:51:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-03-16 17:51:56,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:56,787 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2025-03-16 17:51:56,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2025-03-16 17:51:56,987 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 [2025-03-16 17:51:56,987 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:56,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash 602582210, now seen corresponding path program 62 times [2025-03-16 17:51:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:56,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984537] [2025-03-16 17:51:56,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:56,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:56,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-03-16 17:51:57,006 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-03-16 17:51:57,006 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:57,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:57,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984537] [2025-03-16 17:51:57,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:57,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064682493] [2025-03-16 17:51:57,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:57,636 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) [2025-03-16 17:51:57,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2025-03-16 17:51:57,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-03-16 17:51:57,765 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-03-16 17:51:57,765 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:57,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:57,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-16 17:51:57,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:57,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064682493] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:58,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2025-03-16 17:51:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591268345] [2025-03-16 17:51:58,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:58,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 17:51:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:58,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 17:51:58,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 17:51:58,517 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:58,846 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2025-03-16 17:51:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-03-16 17:51:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 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 130 [2025-03-16 17:51:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:58,847 INFO L225 Difference]: With dead ends: 142 [2025-03-16 17:51:58,847 INFO L226 Difference]: Without dead ends: 140 [2025-03-16 17:51:58,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 223 SyntacticMatches, 65 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1787, Invalid=3043, Unknown=0, NotChecked=0, Total=4830 [2025-03-16 17:51:58,848 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:58,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:51:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-16 17:51:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2025-03-16 17:51:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2025-03-16 17:51:58,856 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2025-03-16 17:51:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:58,857 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2025-03-16 17:51:58,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 37 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2025-03-16 17:51:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-16 17:51:58,857 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:58,857 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1] [2025-03-16 17:51:58,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2025-03-16 17:51:59,057 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 [2025-03-16 17:51:59,058 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:59,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1435809338, now seen corresponding path program 63 times [2025-03-16 17:51:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:59,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234397121] [2025-03-16 17:51:59,058 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:59,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 33 equivalence classes. [2025-03-16 17:51:59,079 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) and asserted 133 of 133 statements. [2025-03-16 17:51:59,080 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2025-03-16 17:51:59,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:00,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234397121] [2025-03-16 17:52:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234397121] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199133913] [2025-03-16 17:52:00,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:52:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:00,239 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) [2025-03-16 17:52:00,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2025-03-16 17:52:00,335 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 33 equivalence classes. [2025-03-16 17:52:00,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) and asserted 133 of 133 statements. [2025-03-16 17:52:00,394 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2025-03-16 17:52:00,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:00,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-03-16 17:52:00,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:00,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:01,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199133913] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:01,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:01,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 67 [2025-03-16 17:52:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671525635] [2025-03-16 17:52:01,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:01,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-03-16 17:52:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:01,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-03-16 17:52:01,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 17:52:01,406 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:01,551 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2025-03-16 17:52:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-03-16 17:52:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2025-03-16 17:52:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:01,552 INFO L225 Difference]: With dead ends: 237 [2025-03-16 17:52:01,552 INFO L226 Difference]: Without dead ends: 135 [2025-03-16 17:52:01,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 200 SyntacticMatches, 65 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 17:52:01,553 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:01,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:52:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-03-16 17:52:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2025-03-16 17:52:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2025-03-16 17:52:01,560 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 133 [2025-03-16 17:52:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:01,560 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2025-03-16 17:52:01,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2025-03-16 17:52:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2025-03-16 17:52:01,560 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:01,560 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2025-03-16 17:52:01,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2025-03-16 17:52:01,761 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 [2025-03-16 17:52:01,761 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:01,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash -945376642, now seen corresponding path program 64 times [2025-03-16 17:52:01,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:01,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387605521] [2025-03-16 17:52:01,761 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:52:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:01,768 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 134 statements into 2 equivalence classes. [2025-03-16 17:52:01,782 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-03-16 17:52:01,782 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:52:01,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387605521] [2025-03-16 17:52:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387605521] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017989394] [2025-03-16 17:52:02,444 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:52:02,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:02,446 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) [2025-03-16 17:52:02,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2025-03-16 17:52:02,543 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 134 statements into 2 equivalence classes. [2025-03-16 17:52:02,582 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-03-16 17:52:02,582 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:52:02,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:02,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-16 17:52:02,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:02,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017989394] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:03,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:03,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 37 [2025-03-16 17:52:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175168849] [2025-03-16 17:52:03,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:03,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-16 17:52:03,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:03,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-16 17:52:03,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 17:52:03,357 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:03,685 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2025-03-16 17:52:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-03-16 17:52:03,685 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 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 134 [2025-03-16 17:52:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:03,686 INFO L225 Difference]: With dead ends: 146 [2025-03-16 17:52:03,686 INFO L226 Difference]: Without dead ends: 144 [2025-03-16 17:52:03,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 232 SyntacticMatches, 66 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1889, Invalid=3081, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 17:52:03,686 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:03,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:52:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-16 17:52:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2025-03-16 17:52:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2025-03-16 17:52:03,693 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2025-03-16 17:52:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:03,693 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2025-03-16 17:52:03,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2025-03-16 17:52:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-03-16 17:52:03,693 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:03,694 INFO L218 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1] [2025-03-16 17:52:03,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2025-03-16 17:52:03,894 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 [2025-03-16 17:52:03,894 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:03,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1614112118, now seen corresponding path program 65 times [2025-03-16 17:52:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363496092] [2025-03-16 17:52:03,894 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:52:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:03,903 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 137 statements into 34 equivalence classes. [2025-03-16 17:52:03,922 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) and asserted 137 of 137 statements. [2025-03-16 17:52:03,922 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2025-03-16 17:52:03,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:05,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363496092] [2025-03-16 17:52:05,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363496092] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138247717] [2025-03-16 17:52:05,160 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:52:05,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:05,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:05,162 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) [2025-03-16 17:52:05,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2025-03-16 17:52:05,262 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 137 statements into 34 equivalence classes. [2025-03-16 17:52:05,318 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) and asserted 137 of 137 statements. [2025-03-16 17:52:05,318 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2025-03-16 17:52:05,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:05,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-03-16 17:52:05,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:05,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138247717] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:06,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:06,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 69 [2025-03-16 17:52:06,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392116801] [2025-03-16 17:52:06,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:06,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-03-16 17:52:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:06,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-03-16 17:52:06,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2025-03-16 17:52:06,362 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:06,583 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2025-03-16 17:52:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-03-16 17:52:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2025-03-16 17:52:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:06,584 INFO L225 Difference]: With dead ends: 244 [2025-03-16 17:52:06,584 INFO L226 Difference]: Without dead ends: 139 [2025-03-16 17:52:06,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 206 SyntacticMatches, 67 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2025-03-16 17:52:06,585 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:06,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 313 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:52:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-03-16 17:52:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2025-03-16 17:52:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2025-03-16 17:52:06,597 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 137 [2025-03-16 17:52:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:06,597 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2025-03-16 17:52:06,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2025-03-16 17:52:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2025-03-16 17:52:06,598 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:06,598 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2025-03-16 17:52:06,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2025-03-16 17:52:06,798 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 [2025-03-16 17:52:06,799 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:06,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1798498114, now seen corresponding path program 66 times [2025-03-16 17:52:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143856231] [2025-03-16 17:52:06,799 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:52:06,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:06,809 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 138 statements into 34 equivalence classes. [2025-03-16 17:52:06,835 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) and asserted 138 of 138 statements. [2025-03-16 17:52:06,835 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2025-03-16 17:52:06,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143856231] [2025-03-16 17:52:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143856231] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843166351] [2025-03-16 17:52:07,596 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:52:07,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:07,598 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) [2025-03-16 17:52:07,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2025-03-16 17:52:07,701 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 138 statements into 34 equivalence classes. [2025-03-16 17:52:07,760 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) and asserted 138 of 138 statements. [2025-03-16 17:52:07,760 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2025-03-16 17:52:07,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:07,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-16 17:52:07,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:07,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843166351] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:08,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:08,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2025-03-16 17:52:08,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390788080] [2025-03-16 17:52:08,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:08,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 17:52:08,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:08,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 17:52:08,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 17:52:08,634 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:09,017 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2025-03-16 17:52:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-16 17:52:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 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 138 [2025-03-16 17:52:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:09,018 INFO L225 Difference]: With dead ends: 150 [2025-03-16 17:52:09,018 INFO L226 Difference]: Without dead ends: 148 [2025-03-16 17:52:09,019 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 238 SyntacticMatches, 68 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2000, Invalid=3402, Unknown=0, NotChecked=0, Total=5402 [2025-03-16 17:52:09,019 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:09,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:52:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-03-16 17:52:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2025-03-16 17:52:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2025-03-16 17:52:09,026 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 138 [2025-03-16 17:52:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:09,026 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2025-03-16 17:52:09,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2025-03-16 17:52:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2025-03-16 17:52:09,026 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:09,026 INFO L218 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1] [2025-03-16 17:52:09,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2025-03-16 17:52:09,227 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 [2025-03-16 17:52:09,227 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:09,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -658833594, now seen corresponding path program 67 times [2025-03-16 17:52:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494291468] [2025-03-16 17:52:09,227 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:52:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:09,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 141 statements into 1 equivalence classes. [2025-03-16 17:52:09,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 141 of 141 statements. [2025-03-16 17:52:09,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:52:09,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:10,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494291468] [2025-03-16 17:52:10,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494291468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192303313] [2025-03-16 17:52:10,570 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:52:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:10,572 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) [2025-03-16 17:52:10,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2025-03-16 17:52:10,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 141 statements into 1 equivalence classes. [2025-03-16 17:52:10,711 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 141 of 141 statements. [2025-03-16 17:52:10,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:52:10,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:10,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 72 conjuncts are in the unsatisfiable core [2025-03-16 17:52:10,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:10,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:11,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192303313] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:11,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:11,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 71 [2025-03-16 17:52:11,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151044745] [2025-03-16 17:52:11,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:11,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2025-03-16 17:52:11,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:11,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2025-03-16 17:52:11,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2025-03-16 17:52:11,795 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:11,969 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2025-03-16 17:52:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-16 17:52:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2025-03-16 17:52:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:11,970 INFO L225 Difference]: With dead ends: 251 [2025-03-16 17:52:11,970 INFO L226 Difference]: Without dead ends: 143 [2025-03-16 17:52:11,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 212 SyntacticMatches, 69 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3536 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2025-03-16 17:52:11,970 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:11,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:52:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-03-16 17:52:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2025-03-16 17:52:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2025-03-16 17:52:11,977 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 141 [2025-03-16 17:52:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:11,977 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2025-03-16 17:52:11,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2025-03-16 17:52:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2025-03-16 17:52:11,978 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:11,978 INFO L218 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2025-03-16 17:52:11,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2025-03-16 17:52:12,178 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 [2025-03-16 17:52:12,178 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:12,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash -381800450, now seen corresponding path program 68 times [2025-03-16 17:52:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:12,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789602979] [2025-03-16 17:52:12,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:52:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:12,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 142 statements into 2 equivalence classes. [2025-03-16 17:52:12,199 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 142 of 142 statements. [2025-03-16 17:52:12,199 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:52:12,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:12,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789602979] [2025-03-16 17:52:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789602979] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005283267] [2025-03-16 17:52:12,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:52:12,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:12,982 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) [2025-03-16 17:52:12,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2025-03-16 17:52:13,088 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 142 statements into 2 equivalence classes. [2025-03-16 17:52:13,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 142 of 142 statements. [2025-03-16 17:52:13,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:52:13,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:13,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-16 17:52:13,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:13,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:13,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005283267] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:13,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2025-03-16 17:52:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261668562] [2025-03-16 17:52:13,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:13,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 17:52:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:13,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 17:52:13,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 17:52:13,975 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:14,348 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2025-03-16 17:52:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-03-16 17:52:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 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 142 [2025-03-16 17:52:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:14,349 INFO L225 Difference]: With dead ends: 154 [2025-03-16 17:52:14,349 INFO L226 Difference]: Without dead ends: 152 [2025-03-16 17:52:14,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 244 SyntacticMatches, 71 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2111, Invalid=3589, Unknown=0, NotChecked=0, Total=5700 [2025-03-16 17:52:14,350 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:14,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:52:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-16 17:52:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2025-03-16 17:52:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2025-03-16 17:52:14,358 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 142 [2025-03-16 17:52:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:14,358 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2025-03-16 17:52:14,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 40 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2025-03-16 17:52:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2025-03-16 17:52:14,359 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:14,359 INFO L218 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1] [2025-03-16 17:52:14,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2025-03-16 17:52:14,559 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 [2025-03-16 17:52:14,559 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:14,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1142936310, now seen corresponding path program 69 times [2025-03-16 17:52:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:14,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691271273] [2025-03-16 17:52:14,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:52:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:14,567 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 145 statements into 36 equivalence classes. [2025-03-16 17:52:14,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) and asserted 145 of 145 statements. [2025-03-16 17:52:14,592 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2025-03-16 17:52:14,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:15,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:15,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691271273] [2025-03-16 17:52:15,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691271273] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:15,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918291293] [2025-03-16 17:52:15,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:52:15,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:15,952 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) [2025-03-16 17:52:15,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2025-03-16 17:52:16,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 145 statements into 36 equivalence classes. [2025-03-16 17:52:16,128 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) and asserted 145 of 145 statements. [2025-03-16 17:52:16,128 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2025-03-16 17:52:16,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:16,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-16 17:52:16,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:16,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:17,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918291293] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:17,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:17,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 73 [2025-03-16 17:52:17,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545484465] [2025-03-16 17:52:17,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:17,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-16 17:52:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:17,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-16 17:52:17,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2025-03-16 17:52:17,289 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:17,521 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2025-03-16 17:52:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-03-16 17:52:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2025-03-16 17:52:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:17,522 INFO L225 Difference]: With dead ends: 258 [2025-03-16 17:52:17,522 INFO L226 Difference]: Without dead ends: 147 [2025-03-16 17:52:17,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 218 SyntacticMatches, 71 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3745 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2025-03-16 17:52:17,523 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:17,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 378 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:52:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-16 17:52:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2025-03-16 17:52:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2025-03-16 17:52:17,530 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 145 [2025-03-16 17:52:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:17,530 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2025-03-16 17:52:17,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2025-03-16 17:52:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-16 17:52:17,530 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:17,530 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2025-03-16 17:52:17,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2025-03-16 17:52:17,731 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 [2025-03-16 17:52:17,731 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:17,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2123611710, now seen corresponding path program 70 times [2025-03-16 17:52:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:17,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546096061] [2025-03-16 17:52:17,732 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:52:17,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:17,739 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 146 statements into 2 equivalence classes. [2025-03-16 17:52:17,754 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 146 of 146 statements. [2025-03-16 17:52:17,754 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:52:17,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:18,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546096061] [2025-03-16 17:52:18,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546096061] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375609538] [2025-03-16 17:52:18,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:52:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:18,534 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) [2025-03-16 17:52:18,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2025-03-16 17:52:18,643 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 146 statements into 2 equivalence classes. [2025-03-16 17:52:18,691 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 146 of 146 statements. [2025-03-16 17:52:18,691 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:52:18,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:18,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-16 17:52:18,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:18,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:19,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375609538] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:19,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:19,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2025-03-16 17:52:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173388057] [2025-03-16 17:52:19,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:19,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-16 17:52:19,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:19,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-16 17:52:19,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 17:52:19,648 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:20,037 INFO L93 Difference]: Finished difference Result 158 states and 159 transitions. [2025-03-16 17:52:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2025-03-16 17:52:20,037 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 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 146 [2025-03-16 17:52:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:20,038 INFO L225 Difference]: With dead ends: 158 [2025-03-16 17:52:20,038 INFO L226 Difference]: Without dead ends: 156 [2025-03-16 17:52:20,039 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 252 SyntacticMatches, 73 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2222, Invalid=3630, Unknown=0, NotChecked=0, Total=5852 [2025-03-16 17:52:20,039 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:20,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:52:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-16 17:52:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2025-03-16 17:52:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2025-03-16 17:52:20,047 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2025-03-16 17:52:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:20,047 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2025-03-16 17:52:20,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2025-03-16 17:52:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2025-03-16 17:52:20,047 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:20,047 INFO L218 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1] [2025-03-16 17:52:20,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2025-03-16 17:52:20,247 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 [2025-03-16 17:52:20,248 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:20,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 352687302, now seen corresponding path program 71 times [2025-03-16 17:52:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:20,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914915476] [2025-03-16 17:52:20,248 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:52:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:20,255 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 149 statements into 37 equivalence classes. [2025-03-16 17:52:20,289 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) and asserted 149 of 149 statements. [2025-03-16 17:52:20,289 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2025-03-16 17:52:20,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:21,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:21,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914915476] [2025-03-16 17:52:21,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914915476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:21,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095314080] [2025-03-16 17:52:21,767 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:52:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:21,768 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) [2025-03-16 17:52:21,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2025-03-16 17:52:21,892 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 149 statements into 37 equivalence classes. [2025-03-16 17:52:21,961 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) and asserted 149 of 149 statements. [2025-03-16 17:52:21,961 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2025-03-16 17:52:21,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:21,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 76 conjuncts are in the unsatisfiable core [2025-03-16 17:52:21,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:22,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:23,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095314080] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:23,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:23,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 75 [2025-03-16 17:52:23,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593638568] [2025-03-16 17:52:23,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:23,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2025-03-16 17:52:23,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:23,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2025-03-16 17:52:23,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2025-03-16 17:52:23,284 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:23,480 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2025-03-16 17:52:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-16 17:52:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2025-03-16 17:52:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:23,481 INFO L225 Difference]: With dead ends: 265 [2025-03-16 17:52:23,481 INFO L226 Difference]: Without dead ends: 151 [2025-03-16 17:52:23,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 224 SyntacticMatches, 73 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2025-03-16 17:52:23,481 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:23,481 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 290 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:52:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2025-03-16 17:52:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2025-03-16 17:52:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2025-03-16 17:52:23,489 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 149 [2025-03-16 17:52:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:23,489 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2025-03-16 17:52:23,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2025-03-16 17:52:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2025-03-16 17:52:23,489 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:23,489 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2025-03-16 17:52:23,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2025-03-16 17:52:23,690 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 [2025-03-16 17:52:23,690 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:23,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:23,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1485344126, now seen corresponding path program 72 times [2025-03-16 17:52:23,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:23,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558029328] [2025-03-16 17:52:23,690 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:52:23,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:23,697 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 150 statements into 37 equivalence classes. [2025-03-16 17:52:23,716 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) and asserted 150 of 150 statements. [2025-03-16 17:52:23,717 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2025-03-16 17:52:23,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558029328] [2025-03-16 17:52:24,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558029328] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:24,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465018526] [2025-03-16 17:52:24,577 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:52:24,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:24,578 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) [2025-03-16 17:52:24,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2025-03-16 17:52:24,698 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 150 statements into 37 equivalence classes. [2025-03-16 17:52:24,765 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) and asserted 150 of 150 statements. [2025-03-16 17:52:24,765 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2025-03-16 17:52:24,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:24,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-03-16 17:52:24,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:24,893 INFO L312 TraceCheckSpWp]: Computing backward predicates...