./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de42.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 04:45:56,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 04:45:56,802 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 04:45:56,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 04:45:56,810 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 04:45:56,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 04:45:56,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 04:45:56,830 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 04:45:56,830 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 04:45:56,830 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 04:45:56,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 04:45:56,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 04:45:56,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 04:45:56,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 04:45:56,832 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 04:45:56,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 04:45:56,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 04:45:56,832 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 04:45:56,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 04:45:56,833 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 04:45:56,833 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 04:45:56,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 04:45:56,834 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 04:45:56,834 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 04:45:56,834 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 04:45:56,834 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 04:45:56,834 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 04:45:56,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 04:45:56,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 04:45:56,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 04:45:56,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 04:45:56,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 04:45:56,835 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 -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2025-03-08 04:45:57,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 04:45:57,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 04:45:57,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 04:45:57,059 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 04:45:57,059 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 04:45:57,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de42.c [2025-03-08 04:45:58,204 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80457851b/9a219f45782a45c2878c3ac2deb48c37/FLAG3deec5fd4 [2025-03-08 04:45:58,426 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 04:45:58,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de42.c [2025-03-08 04:45:58,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80457851b/9a219f45782a45c2878c3ac2deb48c37/FLAG3deec5fd4 [2025-03-08 04:45:58,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80457851b/9a219f45782a45c2878c3ac2deb48c37 [2025-03-08 04:45:58,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 04:45:58,776 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 04:45:58,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 04:45:58,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 04:45:58,780 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 04:45:58,781 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d8ec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58, skipping insertion in model container [2025-03-08 04:45:58,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,792 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 04:45:58,893 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/loops-crafted-1/in-de42.c[368,381] [2025-03-08 04:45:58,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 04:45:58,911 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 04:45:58,919 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/loops-crafted-1/in-de42.c[368,381] [2025-03-08 04:45:58,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 04:45:58,932 INFO L204 MainTranslator]: Completed translation [2025-03-08 04:45:58,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58 WrapperNode [2025-03-08 04:45:58,933 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 04:45:58,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 04:45:58,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 04:45:58,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 04:45:58,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,956 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2025-03-08 04:45:58,957 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 04:45:58,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 04:45:58,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 04:45:58,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 04:45:58,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,968 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,974 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 04:45:58,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,976 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,981 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 04:45:58,984 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 04:45:58,988 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 04:45:58,988 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 04:45:58,989 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (1/1) ... [2025-03-08 04:45:58,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 04:45:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:45:59,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 04:45:59,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 04:45:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 04:45:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 04:45:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 04:45:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 04:45:59,077 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 04:45:59,078 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 04:45:59,182 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-08 04:45:59,183 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 04:45:59,189 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 04:45:59,190 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 04:45:59,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 04:45:59 BoogieIcfgContainer [2025-03-08 04:45:59,191 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 04:45:59,193 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 04:45:59,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 04:45:59,196 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 04:45:59,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 04:45:58" (1/3) ... [2025-03-08 04:45:59,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa2f023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 04:45:59, skipping insertion in model container [2025-03-08 04:45:59,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 04:45:58" (2/3) ... [2025-03-08 04:45:59,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa2f023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 04:45:59, skipping insertion in model container [2025-03-08 04:45:59,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 04:45:59" (3/3) ... [2025-03-08 04:45:59,197 INFO L128 eAbstractionObserver]: Analyzing ICFG in-de42.c [2025-03-08 04:45:59,209 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 04:45:59,211 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG in-de42.c that has 1 procedures, 13 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 04:45:59,256 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 04:45:59,268 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;@7e343a81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 04:45:59,269 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 04:45:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) [2025-03-08 04:45:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-08 04:45:59,278 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:45:59,279 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:45:59,280 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:45:59,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:45:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash -516143365, now seen corresponding path program 1 times [2025-03-08 04:45:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:45:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222458900] [2025-03-08 04:45:59,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:45:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:45:59,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 04:45:59,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 04:45:59,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:45:59,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:45:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:45:59,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:45:59,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222458900] [2025-03-08 04:45:59,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222458900] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:45:59,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:45:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 04:45:59,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687098471] [2025-03-08 04:45:59,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:45:59,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 04:45:59,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:45:59,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 04:45:59,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 04:45:59,852 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:45:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:45:59,945 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2025-03-08 04:45:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 04:45:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2025-03-08 04:45:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:45:59,952 INFO L225 Difference]: With dead ends: 29 [2025-03-08 04:45:59,952 INFO L226 Difference]: Without dead ends: 18 [2025-03-08 04:45:59,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-03-08 04:45:59,955 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 04:45:59,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 04:45:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-08 04:45:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2025-03-08 04:45:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2025-03-08 04:45:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2025-03-08 04:45:59,976 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 8 [2025-03-08 04:45:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:45:59,976 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2025-03-08 04:45:59,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:45:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2025-03-08 04:45:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 04:45:59,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:45:59,977 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:45:59,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 04:45:59,977 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:45:59,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:45:59,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1152734091, now seen corresponding path program 1 times [2025-03-08 04:45:59,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:45:59,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982141153] [2025-03-08 04:45:59,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:45:59,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:45:59,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 04:45:59,986 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 04:45:59,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:45:59,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:00,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:00,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982141153] [2025-03-08 04:46:00,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982141153] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:46:00,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:46:00,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 04:46:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408579895] [2025-03-08 04:46:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:46:00,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 04:46:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:00,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 04:46:00,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 04:46:00,045 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2025-03-08 04:46:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:00,079 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2025-03-08 04:46:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 04:46:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2025-03-08 04:46:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:00,080 INFO L225 Difference]: With dead ends: 19 [2025-03-08 04:46:00,080 INFO L226 Difference]: Without dead ends: 13 [2025-03-08 04:46:00,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 04:46:00,081 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:00,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:46:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-08 04:46:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-08 04:46:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2025-03-08 04:46:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2025-03-08 04:46:00,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2025-03-08 04:46:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:00,088 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2025-03-08 04:46:00,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2025-03-08 04:46:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2025-03-08 04:46:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 04:46:00,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:00,090 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:00,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 04:46:00,090 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:00,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1179456618, now seen corresponding path program 1 times [2025-03-08 04:46:00,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:00,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849183889] [2025-03-08 04:46:00,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:00,094 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 04:46:00,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 04:46:00,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:00,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849183889] [2025-03-08 04:46:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849183889] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 04:46:00,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 04:46:00,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 04:46:00,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031674437] [2025-03-08 04:46:00,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 04:46:00,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 04:46:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:00,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 04:46:00,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 04:46:00,128 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2025-03-08 04:46:00,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:00,148 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2025-03-08 04:46:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 04:46:00,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2025-03-08 04:46:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:00,149 INFO L225 Difference]: With dead ends: 20 [2025-03-08 04:46:00,149 INFO L226 Difference]: Without dead ends: 13 [2025-03-08 04:46:00,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 04:46:00,150 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:00,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:46:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-08 04:46:00,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-08 04:46:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2025-03-08 04:46:00,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 9 [2025-03-08 04:46:00,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:00,158 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2025-03-08 04:46:00,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2025-03-08 04:46:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2025-03-08 04:46:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-08 04:46:00,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:00,159 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:00,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 04:46:00,159 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:00,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2097496074, now seen corresponding path program 1 times [2025-03-08 04:46:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:00,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310938009] [2025-03-08 04:46:00,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:00,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 04:46:00,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 04:46:00,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:00,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310938009] [2025-03-08 04:46:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310938009] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480930880] [2025-03-08 04:46:00,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:00,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:00,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:00,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:00,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 04:46:00,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-08 04:46:00,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-08 04:46:00,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:00,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:00,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 04:46:00,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:00,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:00,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480930880] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:00,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:00,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-08 04:46:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57738690] [2025-03-08 04:46:00,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:00,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 04:46:00,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:00,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 04:46:00,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-08 04:46:00,362 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2025-03-08 04:46:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:00,470 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2025-03-08 04:46:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 04:46:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) Word has length 9 [2025-03-08 04:46:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:00,472 INFO L225 Difference]: With dead ends: 35 [2025-03-08 04:46:00,472 INFO L226 Difference]: Without dead ends: 28 [2025-03-08 04:46:00,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-08 04:46:00,473 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:00,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 04:46:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-08 04:46:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2025-03-08 04:46:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 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) [2025-03-08 04:46:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2025-03-08 04:46:00,478 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 9 [2025-03-08 04:46:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:00,478 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2025-03-08 04:46:00,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2025-03-08 04:46:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2025-03-08 04:46:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 04:46:00,479 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:00,479 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:00,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 04:46:00,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:00,680 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:00,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash 525818982, now seen corresponding path program 1 times [2025-03-08 04:46:00,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:00,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785126410] [2025-03-08 04:46:00,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:00,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:00,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 04:46:00,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 04:46:00,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:00,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 04:46:00,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:00,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785126410] [2025-03-08 04:46:00,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785126410] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:00,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447532244] [2025-03-08 04:46:00,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:00,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:00,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:00,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 04:46:00,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 04:46:00,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 04:46:00,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:00,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:00,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 04:46:00,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:00,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:00,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447532244] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:00,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-03-08 04:46:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350771833] [2025-03-08 04:46:00,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:00,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 04:46:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:00,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 04:46:00,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 04:46:00,830 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2025-03-08 04:46:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:00,870 INFO L93 Difference]: Finished difference Result 53 states and 80 transitions. [2025-03-08 04:46:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 04:46:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) Word has length 11 [2025-03-08 04:46:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:00,871 INFO L225 Difference]: With dead ends: 53 [2025-03-08 04:46:00,871 INFO L226 Difference]: Without dead ends: 49 [2025-03-08 04:46:00,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-08 04:46:00,872 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:00,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:46:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-08 04:46:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2025-03-08 04:46:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) [2025-03-08 04:46:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 63 transitions. [2025-03-08 04:46:00,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 63 transitions. Word has length 11 [2025-03-08 04:46:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:00,879 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 63 transitions. [2025-03-08 04:46:00,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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) [2025-03-08 04:46:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 63 transitions. [2025-03-08 04:46:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 04:46:00,879 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:00,879 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:00,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 04:46:01,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:01,083 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:01,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:01,083 INFO L85 PathProgramCache]: Analyzing trace with hash -879448993, now seen corresponding path program 1 times [2025-03-08 04:46:01,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:01,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175740551] [2025-03-08 04:46:01,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:01,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 04:46:01,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 04:46:01,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:01,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:01,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:01,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175740551] [2025-03-08 04:46:01,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175740551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:01,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187373022] [2025-03-08 04:46:01,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 04:46:01,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:01,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:01,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:01,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 04:46:01,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 04:46:01,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 04:46:01,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:01,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:01,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 04:46:01,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:01,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:01,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187373022] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:01,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:01,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-03-08 04:46:01,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208913531] [2025-03-08 04:46:01,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:01,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 04:46:01,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:01,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 04:46:01,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2025-03-08 04:46:01,919 INFO L87 Difference]: Start difference. First operand 42 states and 63 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 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) [2025-03-08 04:46:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:02,254 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2025-03-08 04:46:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 04:46:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 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 12 [2025-03-08 04:46:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:02,255 INFO L225 Difference]: With dead ends: 51 [2025-03-08 04:46:02,255 INFO L226 Difference]: Without dead ends: 32 [2025-03-08 04:46:02,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2025-03-08 04:46:02,256 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:02,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 04:46:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-08 04:46:02,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2025-03-08 04:46:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2025-03-08 04:46:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 47 transitions. [2025-03-08 04:46:02,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 47 transitions. Word has length 12 [2025-03-08 04:46:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:02,261 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 47 transitions. [2025-03-08 04:46:02,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 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) [2025-03-08 04:46:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 47 transitions. [2025-03-08 04:46:02,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 04:46:02,262 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:02,262 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:02,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:02,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:02,466 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:02,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 137990843, now seen corresponding path program 2 times [2025-03-08 04:46:02,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:02,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589770202] [2025-03-08 04:46:02,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:02,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:02,472 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-08 04:46:02,479 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 04:46:02,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:02,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:02,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:02,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589770202] [2025-03-08 04:46:02,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589770202] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:02,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111274375] [2025-03-08 04:46:02,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:02,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:02,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:02,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:02,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 04:46:02,590 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-08 04:46:02,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 04:46:02,597 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:02,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:02,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 04:46:02,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:02,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:02,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111274375] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:02,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:02,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-08 04:46:02,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254871645] [2025-03-08 04:46:02,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:02,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 04:46:02,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:02,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 04:46:02,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-08 04:46:02,694 INFO L87 Difference]: Start difference. First operand 31 states and 47 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2025-03-08 04:46:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:03,195 INFO L93 Difference]: Finished difference Result 130 states and 234 transitions. [2025-03-08 04:46:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 04:46:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 12 [2025-03-08 04:46:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:03,197 INFO L225 Difference]: With dead ends: 130 [2025-03-08 04:46:03,197 INFO L226 Difference]: Without dead ends: 119 [2025-03-08 04:46:03,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2025-03-08 04:46:03,198 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:03,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 55 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 04:46:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-08 04:46:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2025-03-08 04:46:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.523076923076923) internal successors, (99), 65 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) [2025-03-08 04:46:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 99 transitions. [2025-03-08 04:46:03,212 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 99 transitions. Word has length 12 [2025-03-08 04:46:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:03,212 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 99 transitions. [2025-03-08 04:46:03,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2025-03-08 04:46:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 99 transitions. [2025-03-08 04:46:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-08 04:46:03,213 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:03,213 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:03,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:03,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:03,414 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:03,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash 653003322, now seen corresponding path program 2 times [2025-03-08 04:46:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:03,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670671305] [2025-03-08 04:46:03,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:03,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:03,417 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 04:46:03,424 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 04:46:03,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:03,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 04:46:03,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:03,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670671305] [2025-03-08 04:46:03,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670671305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:03,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580286691] [2025-03-08 04:46:03,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:03,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:03,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:03,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:03,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 04:46:03,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 04:46:03,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 04:46:03,525 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:03,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:03,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 04:46:03,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 04:46:03,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 04:46:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580286691] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:03,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:03,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2025-03-08 04:46:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468200200] [2025-03-08 04:46:03,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:03,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 04:46:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:03,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 04:46:03,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-08 04:46:03,599 INFO L87 Difference]: Start difference. First operand 66 states and 99 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2025-03-08 04:46:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:03,694 INFO L93 Difference]: Finished difference Result 93 states and 132 transitions. [2025-03-08 04:46:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 04:46:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 14 [2025-03-08 04:46:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:03,695 INFO L225 Difference]: With dead ends: 93 [2025-03-08 04:46:03,695 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 04:46:03,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-08 04:46:03,696 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:03,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 04:46:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 04:46:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2025-03-08 04:46:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 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) [2025-03-08 04:46:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2025-03-08 04:46:03,712 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 14 [2025-03-08 04:46:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:03,712 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2025-03-08 04:46:03,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2025-03-08 04:46:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2025-03-08 04:46:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 04:46:03,713 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:03,713 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:03,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:03,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:03,919 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:03,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1482434314, now seen corresponding path program 3 times [2025-03-08 04:46:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341303471] [2025-03-08 04:46:03,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:46:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:03,922 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 04:46:03,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 04:46:03,933 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 04:46:03,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 04:46:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341303471] [2025-03-08 04:46:04,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341303471] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:04,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044958643] [2025-03-08 04:46:04,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:46:04,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:04,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:04,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 04:46:04,025 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 04:46:04,033 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 04:46:04,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 04:46:04,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:04,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 04:46:04,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 04:46:04,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 04:46:04,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044958643] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:04,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:04,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2025-03-08 04:46:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194287174] [2025-03-08 04:46:04,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:04,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 04:46:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:04,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 04:46:04,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-08 04:46:04,102 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:04,194 INFO L93 Difference]: Finished difference Result 104 states and 152 transitions. [2025-03-08 04:46:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 04:46:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-08 04:46:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:04,195 INFO L225 Difference]: With dead ends: 104 [2025-03-08 04:46:04,195 INFO L226 Difference]: Without dead ends: 100 [2025-03-08 04:46:04,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-03-08 04:46:04,196 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:04,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:46:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-08 04:46:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2025-03-08 04:46:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4886363636363635) internal successors, (131), 88 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) [2025-03-08 04:46:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 131 transitions. [2025-03-08 04:46:04,210 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 131 transitions. Word has length 15 [2025-03-08 04:46:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:04,211 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 131 transitions. [2025-03-08 04:46:04,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 131 transitions. [2025-03-08 04:46:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 04:46:04,211 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:04,211 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:04,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:04,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:04,416 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:04,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1289144773, now seen corresponding path program 4 times [2025-03-08 04:46:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:04,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697353755] [2025-03-08 04:46:04,416 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:46:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:04,423 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-03-08 04:46:04,431 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 04:46:04,431 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:46:04,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:04,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:04,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697353755] [2025-03-08 04:46:04,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697353755] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:04,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993387287] [2025-03-08 04:46:04,685 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:46:04,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:04,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:04,687 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) [2025-03-08 04:46:04,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 04:46:04,709 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-03-08 04:46:04,728 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 04:46:04,729 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:46:04,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:04,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 04:46:04,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:04,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:05,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993387287] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:05,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 28 [2025-03-08 04:46:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487368666] [2025-03-08 04:46:05,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:05,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 04:46:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:05,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 04:46:05,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2025-03-08 04:46:05,182 INFO L87 Difference]: Start difference. First operand 89 states and 131 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2025-03-08 04:46:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:05,498 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2025-03-08 04:46:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 04:46:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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 16 [2025-03-08 04:46:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:05,501 INFO L225 Difference]: With dead ends: 114 [2025-03-08 04:46:05,501 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 04:46:05,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2025-03-08 04:46:05,502 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:05,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 69 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 04:46:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 04:46:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2025-03-08 04:46:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 81 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) [2025-03-08 04:46:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 119 transitions. [2025-03-08 04:46:05,523 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 119 transitions. Word has length 16 [2025-03-08 04:46:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:05,523 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 119 transitions. [2025-03-08 04:46:05,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 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) [2025-03-08 04:46:05,523 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 119 transitions. [2025-03-08 04:46:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 04:46:05,524 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:05,524 INFO L218 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:05,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:05,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:05,728 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:05,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1468405791, now seen corresponding path program 5 times [2025-03-08 04:46:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585736427] [2025-03-08 04:46:05,729 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 04:46:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:05,732 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 4 equivalence classes. [2025-03-08 04:46:05,737 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 04:46:05,737 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 04:46:05,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585736427] [2025-03-08 04:46:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585736427] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714341200] [2025-03-08 04:46:05,830 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 04:46:05,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:05,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:05,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:05,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 04:46:05,858 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 4 equivalence classes. [2025-03-08 04:46:05,867 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 04:46:05,867 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 04:46:05,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:05,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 04:46:05,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:05,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:05,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714341200] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:05,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:05,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2025-03-08 04:46:05,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444165848] [2025-03-08 04:46:05,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:05,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 04:46:05,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:05,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 04:46:05,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2025-03-08 04:46:05,985 INFO L87 Difference]: Start difference. First operand 82 states and 119 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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) [2025-03-08 04:46:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:07,063 INFO L93 Difference]: Finished difference Result 233 states and 379 transitions. [2025-03-08 04:46:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-08 04:46:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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) Word has length 16 [2025-03-08 04:46:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:07,064 INFO L225 Difference]: With dead ends: 233 [2025-03-08 04:46:07,064 INFO L226 Difference]: Without dead ends: 209 [2025-03-08 04:46:07,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=963, Invalid=2577, Unknown=0, NotChecked=0, Total=3540 [2025-03-08 04:46:07,066 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 185 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:07,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 71 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 04:46:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-08 04:46:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 110. [2025-03-08 04:46:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 109 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 161 transitions. [2025-03-08 04:46:07,084 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 161 transitions. Word has length 16 [2025-03-08 04:46:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:07,085 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 161 transitions. [2025-03-08 04:46:07,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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) [2025-03-08 04:46:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 161 transitions. [2025-03-08 04:46:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 04:46:07,085 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:07,085 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:07,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:07,286 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,SelfDestructingSolverStorable10 [2025-03-08 04:46:07,286 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:07,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1695435512, now seen corresponding path program 6 times [2025-03-08 04:46:07,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:07,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219281638] [2025-03-08 04:46:07,287 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 04:46:07,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:07,290 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-03-08 04:46:07,296 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 04:46:07,296 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 04:46:07,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 04:46:07,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:07,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219281638] [2025-03-08 04:46:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219281638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:07,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561229931] [2025-03-08 04:46:07,381 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 04:46:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:07,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:07,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 04:46:07,407 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-03-08 04:46:07,419 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 04:46:07,419 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 04:46:07,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:07,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 04:46:07,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 04:46:07,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 04:46:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561229931] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:07,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2025-03-08 04:46:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636514895] [2025-03-08 04:46:07,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:07,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 04:46:07,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:07,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 04:46:07,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2025-03-08 04:46:07,583 INFO L87 Difference]: Start difference. First operand 110 states and 161 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2025-03-08 04:46:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:07,933 INFO L93 Difference]: Finished difference Result 154 states and 216 transitions. [2025-03-08 04:46:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 04:46:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 18 [2025-03-08 04:46:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:07,935 INFO L225 Difference]: With dead ends: 154 [2025-03-08 04:46:07,935 INFO L226 Difference]: Without dead ends: 129 [2025-03-08 04:46:07,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2025-03-08 04:46:07,936 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:07,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 04:46:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-03-08 04:46:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2025-03-08 04:46:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 102 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) [2025-03-08 04:46:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 147 transitions. [2025-03-08 04:46:07,963 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 147 transitions. Word has length 18 [2025-03-08 04:46:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:07,963 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 147 transitions. [2025-03-08 04:46:07,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2025-03-08 04:46:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 147 transitions. [2025-03-08 04:46:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 04:46:07,964 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:07,964 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:07,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:08,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:08,165 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:08,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1396090534, now seen corresponding path program 7 times [2025-03-08 04:46:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:08,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141680262] [2025-03-08 04:46:08,165 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 04:46:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:08,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 04:46:08,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:46:08,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:08,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 04:46:08,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:08,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141680262] [2025-03-08 04:46:08,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141680262] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:08,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662872699] [2025-03-08 04:46:08,276 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 04:46:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:08,278 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:08,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 04:46:08,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 04:46:08,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:46:08,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:08,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:08,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 04:46:08,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 04:46:08,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 04:46:08,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662872699] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:08,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:08,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2025-03-08 04:46:08,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007350509] [2025-03-08 04:46:08,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:08,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 04:46:08,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:08,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 04:46:08,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 04:46:08,385 INFO L87 Difference]: Start difference. First operand 103 states and 147 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2025-03-08 04:46:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:08,460 INFO L93 Difference]: Finished difference Result 122 states and 169 transitions. [2025-03-08 04:46:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 04:46:08,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 19 [2025-03-08 04:46:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:08,461 INFO L225 Difference]: With dead ends: 122 [2025-03-08 04:46:08,461 INFO L226 Difference]: Without dead ends: 119 [2025-03-08 04:46:08,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-08 04:46:08,461 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:08,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 04:46:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-08 04:46:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2025-03-08 04:46:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4196428571428572) internal successors, (159), 112 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 159 transitions. [2025-03-08 04:46:08,492 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 159 transitions. Word has length 19 [2025-03-08 04:46:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:08,492 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 159 transitions. [2025-03-08 04:46:08,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2025-03-08 04:46:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 159 transitions. [2025-03-08 04:46:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 04:46:08,492 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:08,492 INFO L218 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:08,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 04:46:08,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 04:46:08,693 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:08,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1182371158, now seen corresponding path program 3 times [2025-03-08 04:46:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:08,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258587025] [2025-03-08 04:46:08,694 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:46:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:08,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 7 equivalence classes. [2025-03-08 04:46:08,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:46:08,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 04:46:08,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258587025] [2025-03-08 04:46:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258587025] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138057786] [2025-03-08 04:46:08,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:46:08,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:08,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:08,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 04:46:08,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 7 equivalence classes. [2025-03-08 04:46:08,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 04:46:08,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 04:46:08,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:08,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 04:46:08,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:08,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138057786] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:09,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2025-03-08 04:46:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604070068] [2025-03-08 04:46:09,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:09,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 04:46:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:09,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 04:46:09,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2025-03-08 04:46:09,128 INFO L87 Difference]: Start difference. First operand 113 states and 159 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2025-03-08 04:46:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:12,136 INFO L93 Difference]: Finished difference Result 492 states and 791 transitions. [2025-03-08 04:46:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-03-08 04:46:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-08 04:46:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:12,138 INFO L225 Difference]: With dead ends: 492 [2025-03-08 04:46:12,138 INFO L226 Difference]: Without dead ends: 458 [2025-03-08 04:46:12,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1575, Invalid=3537, Unknown=0, NotChecked=0, Total=5112 [2025-03-08 04:46:12,140 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 523 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:12,140 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 196 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 04:46:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2025-03-08 04:46:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 177. [2025-03-08 04:46:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4204545454545454) internal successors, (250), 176 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 250 transitions. [2025-03-08 04:46:12,192 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 250 transitions. Word has length 19 [2025-03-08 04:46:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:12,192 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 250 transitions. [2025-03-08 04:46:12,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2025-03-08 04:46:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 250 transitions. [2025-03-08 04:46:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 04:46:12,193 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:12,194 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:12,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 04:46:12,394 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,SelfDestructingSolverStorable13 [2025-03-08 04:46:12,394 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:12,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1806246952, now seen corresponding path program 2 times [2025-03-08 04:46:12,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:12,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961559746] [2025-03-08 04:46:12,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:12,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:12,397 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 04:46:12,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 04:46:12,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:12,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 04:46:12,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961559746] [2025-03-08 04:46:12,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961559746] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614867663] [2025-03-08 04:46:12,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:12,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:12,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 04:46:12,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 04:46:12,539 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 04:46:12,539 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:12,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:12,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 04:46:12,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 04:46:12,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 04:46:12,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614867663] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:12,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:12,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-08 04:46:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397139160] [2025-03-08 04:46:12,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:12,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 04:46:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:12,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 04:46:12,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2025-03-08 04:46:12,705 INFO L87 Difference]: Start difference. First operand 177 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2025-03-08 04:46:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:13,646 INFO L93 Difference]: Finished difference Result 410 states and 605 transitions. [2025-03-08 04:46:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 04:46:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2025-03-08 04:46:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:13,648 INFO L225 Difference]: With dead ends: 410 [2025-03-08 04:46:13,648 INFO L226 Difference]: Without dead ends: 406 [2025-03-08 04:46:13,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 04:46:13,649 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:13,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 200 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 04:46:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2025-03-08 04:46:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 295. [2025-03-08 04:46:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.554421768707483) internal successors, (457), 294 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 457 transitions. [2025-03-08 04:46:13,728 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 457 transitions. Word has length 20 [2025-03-08 04:46:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:13,728 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 457 transitions. [2025-03-08 04:46:13,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2025-03-08 04:46:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 457 transitions. [2025-03-08 04:46:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 04:46:13,729 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:13,729 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:13,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 04:46:13,929 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,SelfDestructingSolverStorable14 [2025-03-08 04:46:13,929 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:13,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash 329165343, now seen corresponding path program 8 times [2025-03-08 04:46:13,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:13,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367123679] [2025-03-08 04:46:13,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:13,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:13,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 04:46:13,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 04:46:13,950 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:13,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:14,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367123679] [2025-03-08 04:46:14,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367123679] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72732144] [2025-03-08 04:46:14,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:14,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:14,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:14,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 04:46:14,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-08 04:46:14,531 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 04:46:14,531 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:14,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:14,532 WARN L254 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-08 04:46:14,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:14,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72732144] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:16,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:16,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2025-03-08 04:46:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813105597] [2025-03-08 04:46:16,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:16,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-08 04:46:16,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:16,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-08 04:46:16,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 04:46:16,122 INFO L87 Difference]: Start difference. First operand 295 states and 457 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2025-03-08 04:46:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:16,901 INFO L93 Difference]: Finished difference Result 335 states and 497 transitions. [2025-03-08 04:46:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 04:46:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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 20 [2025-03-08 04:46:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:16,903 INFO L225 Difference]: With dead ends: 335 [2025-03-08 04:46:16,903 INFO L226 Difference]: Without dead ends: 286 [2025-03-08 04:46:16,904 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=423, Invalid=2547, Unknown=0, NotChecked=0, Total=2970 [2025-03-08 04:46:16,905 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:16,905 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 139 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 04:46:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2025-03-08 04:46:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2025-03-08 04:46:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.5448028673835126) internal successors, (431), 279 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 431 transitions. [2025-03-08 04:46:17,005 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 431 transitions. Word has length 20 [2025-03-08 04:46:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:17,005 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 431 transitions. [2025-03-08 04:46:17,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2025-03-08 04:46:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 431 transitions. [2025-03-08 04:46:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-08 04:46:17,006 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:17,006 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:17,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 04:46:17,206 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,SelfDestructingSolverStorable15 [2025-03-08 04:46:17,207 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:17,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash 544528058, now seen corresponding path program 9 times [2025-03-08 04:46:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895916516] [2025-03-08 04:46:17,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:46:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:17,211 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-03-08 04:46:17,226 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 04:46:17,226 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 04:46:17,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 04:46:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895916516] [2025-03-08 04:46:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895916516] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140839984] [2025-03-08 04:46:17,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:46:17,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:17,322 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:17,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 04:46:17,343 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-03-08 04:46:17,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 04:46:17,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 04:46:17,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:17,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 04:46:17,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 04:46:17,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 04:46:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140839984] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:17,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:17,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2025-03-08 04:46:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001423536] [2025-03-08 04:46:17,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:17,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 04:46:17,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:17,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 04:46:17,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2025-03-08 04:46:17,472 INFO L87 Difference]: Start difference. First operand 280 states and 431 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2025-03-08 04:46:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:18,882 INFO L93 Difference]: Finished difference Result 495 states and 667 transitions. [2025-03-08 04:46:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-08 04:46:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-08 04:46:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:18,884 INFO L225 Difference]: With dead ends: 495 [2025-03-08 04:46:18,884 INFO L226 Difference]: Without dead ends: 457 [2025-03-08 04:46:18,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=902, Invalid=3790, Unknown=0, NotChecked=0, Total=4692 [2025-03-08 04:46:18,885 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 129 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:18,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 52 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 04:46:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2025-03-08 04:46:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 280. [2025-03-08 04:46:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.5161290322580645) internal successors, (423), 279 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 423 transitions. [2025-03-08 04:46:19,000 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 423 transitions. Word has length 22 [2025-03-08 04:46:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:19,000 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 423 transitions. [2025-03-08 04:46:19,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2025-03-08 04:46:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 423 transitions. [2025-03-08 04:46:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 04:46:19,001 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:19,001 INFO L218 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:19,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 04:46:19,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:19,201 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:19,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash -697079666, now seen corresponding path program 10 times [2025-03-08 04:46:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:19,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753320657] [2025-03-08 04:46:19,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:46:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:19,205 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 04:46:19,210 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 04:46:19,210 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:46:19,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:19,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753320657] [2025-03-08 04:46:19,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753320657] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:19,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944224381] [2025-03-08 04:46:19,358 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:46:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:19,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:19,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 04:46:19,383 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 04:46:19,398 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 04:46:19,398 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:46:19,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:19,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 04:46:19,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:19,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 04:46:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944224381] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:19,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:19,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-03-08 04:46:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920676801] [2025-03-08 04:46:19,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:19,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 04:46:19,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:19,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 04:46:19,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 04:46:19,765 INFO L87 Difference]: Start difference. First operand 280 states and 423 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2025-03-08 04:46:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:28,154 INFO L93 Difference]: Finished difference Result 847 states and 1387 transitions. [2025-03-08 04:46:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2025-03-08 04:46:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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 23 [2025-03-08 04:46:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:28,158 INFO L225 Difference]: With dead ends: 847 [2025-03-08 04:46:28,158 INFO L226 Difference]: Without dead ends: 821 [2025-03-08 04:46:28,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6696 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4904, Invalid=12918, Unknown=0, NotChecked=0, Total=17822 [2025-03-08 04:46:28,162 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 889 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:28,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 213 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-08 04:46:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2025-03-08 04:46:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 329. [2025-03-08 04:46:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.5365853658536586) internal successors, (504), 328 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 504 transitions. [2025-03-08 04:46:28,290 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 504 transitions. Word has length 23 [2025-03-08 04:46:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:28,290 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 504 transitions. [2025-03-08 04:46:28,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2025-03-08 04:46:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 504 transitions. [2025-03-08 04:46:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 04:46:28,291 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:28,291 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:28,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 04:46:28,491 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,SelfDestructingSolverStorable17 [2025-03-08 04:46:28,492 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:28,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -70072965, now seen corresponding path program 11 times [2025-03-08 04:46:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:28,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920830879] [2025-03-08 04:46:28,492 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 04:46:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:28,495 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-08 04:46:28,511 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 04:46:28,511 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 04:46:28,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:29,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:29,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920830879] [2025-03-08 04:46:29,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920830879] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:29,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533949557] [2025-03-08 04:46:29,004 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 04:46:29,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:29,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:29,008 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 04:46:29,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 04:46:29,033 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-08 04:46:29,117 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 04:46:29,117 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 04:46:29,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:29,118 WARN L254 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-08 04:46:29,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:29,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:30,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533949557] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:30,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:30,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2025-03-08 04:46:30,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598100424] [2025-03-08 04:46:30,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:30,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 04:46:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:30,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 04:46:30,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1531, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 04:46:30,598 INFO L87 Difference]: Start difference. First operand 329 states and 504 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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) [2025-03-08 04:46:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:32,522 INFO L93 Difference]: Finished difference Result 366 states and 541 transitions. [2025-03-08 04:46:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 04:46:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2025-03-08 04:46:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:32,524 INFO L225 Difference]: With dead ends: 366 [2025-03-08 04:46:32,524 INFO L226 Difference]: Without dead ends: 324 [2025-03-08 04:46:32,525 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=306, Invalid=2664, Unknown=0, NotChecked=0, Total=2970 [2025-03-08 04:46:32,525 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:32,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 160 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-08 04:46:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2025-03-08 04:46:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 314. [2025-03-08 04:46:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.5335463258785942) internal successors, (480), 313 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 480 transitions. [2025-03-08 04:46:32,642 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 480 transitions. Word has length 24 [2025-03-08 04:46:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:32,642 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 480 transitions. [2025-03-08 04:46:32,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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) [2025-03-08 04:46:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 480 transitions. [2025-03-08 04:46:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 04:46:32,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:32,643 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:32,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 04:46:32,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:32,843 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:32,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1866942600, now seen corresponding path program 12 times [2025-03-08 04:46:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:32,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354870450] [2025-03-08 04:46:32,844 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 04:46:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:32,846 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 4 equivalence classes. [2025-03-08 04:46:32,859 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 04:46:32,859 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 04:46:32,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 04:46:32,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:32,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354870450] [2025-03-08 04:46:32,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354870450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:32,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587353421] [2025-03-08 04:46:32,985 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 04:46:32,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:32,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:32,987 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) [2025-03-08 04:46:32,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 04:46:33,011 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 4 equivalence classes. [2025-03-08 04:46:33,027 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 04:46:33,027 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-08 04:46:33,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:33,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 04:46:33,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 04:46:33,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 04:46:33,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587353421] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:33,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:33,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 29 [2025-03-08 04:46:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519457593] [2025-03-08 04:46:33,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:33,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 04:46:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:33,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 04:46:33,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2025-03-08 04:46:33,408 INFO L87 Difference]: Start difference. First operand 314 states and 480 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2025-03-08 04:46:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:34,741 INFO L93 Difference]: Finished difference Result 456 states and 639 transitions. [2025-03-08 04:46:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-08 04:46:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) Word has length 26 [2025-03-08 04:46:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:34,743 INFO L225 Difference]: With dead ends: 456 [2025-03-08 04:46:34,743 INFO L226 Difference]: Without dead ends: 370 [2025-03-08 04:46:34,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=2846, Unknown=0, NotChecked=0, Total=3306 [2025-03-08 04:46:34,744 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:34,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 65 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 04:46:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2025-03-08 04:46:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 290. [2025-03-08 04:46:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.5155709342560553) internal successors, (438), 289 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 438 transitions. [2025-03-08 04:46:34,854 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 438 transitions. Word has length 26 [2025-03-08 04:46:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:34,855 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 438 transitions. [2025-03-08 04:46:34,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2025-03-08 04:46:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 438 transitions. [2025-03-08 04:46:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 04:46:34,855 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:34,855 INFO L218 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:34,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 04:46:35,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:35,056 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:35,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2061517546, now seen corresponding path program 13 times [2025-03-08 04:46:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:35,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374280035] [2025-03-08 04:46:35,057 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 04:46:35,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:35,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 04:46:35,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 04:46:35,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:35,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 04:46:35,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:35,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374280035] [2025-03-08 04:46:35,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374280035] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:35,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165779400] [2025-03-08 04:46:35,298 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 04:46:35,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:35,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:35,300 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) [2025-03-08 04:46:35,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 04:46:35,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 04:46:35,335 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 04:46:35,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 04:46:35,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:35,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-08 04:46:35,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 04:46:35,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 04:46:35,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165779400] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:35,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:35,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2025-03-08 04:46:35,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758254498] [2025-03-08 04:46:35,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:35,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 04:46:35,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:35,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 04:46:35,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 04:46:35,714 INFO L87 Difference]: Start difference. First operand 290 states and 438 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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) [2025-03-08 04:46:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:46:51,797 INFO L93 Difference]: Finished difference Result 908 states and 1373 transitions. [2025-03-08 04:46:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2025-03-08 04:46:51,798 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 27 [2025-03-08 04:46:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:46:51,800 INFO L225 Difference]: With dead ends: 908 [2025-03-08 04:46:51,800 INFO L226 Difference]: Without dead ends: 874 [2025-03-08 04:46:51,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14225 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=8639, Invalid=27271, Unknown=0, NotChecked=0, Total=35910 [2025-03-08 04:46:51,805 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 1043 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-08 04:46:51,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 230 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-08 04:46:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2025-03-08 04:46:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 337. [2025-03-08 04:46:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.5357142857142858) internal successors, (516), 336 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:46:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 516 transitions. [2025-03-08 04:46:51,953 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 516 transitions. Word has length 27 [2025-03-08 04:46:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:46:51,953 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 516 transitions. [2025-03-08 04:46:51,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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) [2025-03-08 04:46:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 516 transitions. [2025-03-08 04:46:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 04:46:51,954 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:46:51,954 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:46:51,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 04:46:52,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:52,155 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:46:52,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:46:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1514666017, now seen corresponding path program 14 times [2025-03-08 04:46:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:46:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466270318] [2025-03-08 04:46:52,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:46:52,160 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 04:46:52,186 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 04:46:52,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:52,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:53,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:46:53,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466270318] [2025-03-08 04:46:53,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466270318] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:46:53,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598641482] [2025-03-08 04:46:53,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 04:46:53,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:46:53,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:46:53,057 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) [2025-03-08 04:46:53,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 04:46:53,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 04:46:53,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 04:46:53,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 04:46:53,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:46:53,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-08 04:46:53,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:46:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:53,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:46:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 04:46:54,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598641482] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:46:54,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:46:54,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 57 [2025-03-08 04:46:54,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592119017] [2025-03-08 04:46:54,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:46:54,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-08 04:46:54,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:46:54,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-08 04:46:54,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3019, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 04:46:54,909 INFO L87 Difference]: Start difference. First operand 337 states and 516 transitions. Second operand has 57 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 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) [2025-03-08 04:47:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:47:03,281 INFO L93 Difference]: Finished difference Result 369 states and 548 transitions. [2025-03-08 04:47:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 04:47:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-08 04:47:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:47:03,285 INFO L225 Difference]: With dead ends: 369 [2025-03-08 04:47:03,285 INFO L226 Difference]: Without dead ends: 323 [2025-03-08 04:47:03,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=259, Invalid=4031, Unknown=0, NotChecked=0, Total=4290 [2025-03-08 04:47:03,287 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 04:47:03,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 145 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 04:47:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2025-03-08 04:47:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2025-03-08 04:47:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.5389408099688473) internal successors, (494), 321 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:47:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 494 transitions. [2025-03-08 04:47:03,451 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 494 transitions. Word has length 28 [2025-03-08 04:47:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:47:03,451 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 494 transitions. [2025-03-08 04:47:03,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 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) [2025-03-08 04:47:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 494 transitions. [2025-03-08 04:47:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 04:47:03,452 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:47:03,452 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:47:03,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 04:47:03,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:47:03,652 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:47:03,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:47:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1385613899, now seen corresponding path program 15 times [2025-03-08 04:47:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:47:03,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500773054] [2025-03-08 04:47:03,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:47:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:47:03,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-08 04:47:03,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 04:47:03,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 04:47:03,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:47:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 04:47:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:47:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500773054] [2025-03-08 04:47:03,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500773054] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:47:03,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172027500] [2025-03-08 04:47:03,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 04:47:03,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:47:03,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:47:03,836 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) [2025-03-08 04:47:03,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 04:47:03,862 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-03-08 04:47:03,968 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 04:47:03,968 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 04:47:03,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:47:03,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 04:47:03,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:47:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 04:47:04,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:47:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 04:47:04,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172027500] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:47:04,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:47:04,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 25 [2025-03-08 04:47:04,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704658512] [2025-03-08 04:47:04,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:47:04,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 04:47:04,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:47:04,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 04:47:04,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2025-03-08 04:47:04,449 INFO L87 Difference]: Start difference. First operand 322 states and 494 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2025-03-08 04:47:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:47:05,810 INFO L93 Difference]: Finished difference Result 405 states and 587 transitions. [2025-03-08 04:47:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-08 04:47:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2025-03-08 04:47:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:47:05,812 INFO L225 Difference]: With dead ends: 405 [2025-03-08 04:47:05,812 INFO L226 Difference]: Without dead ends: 364 [2025-03-08 04:47:05,812 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=3373, Unknown=0, NotChecked=0, Total=3782 [2025-03-08 04:47:05,813 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 04:47:05,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 199 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 04:47:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2025-03-08 04:47:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 336. [2025-03-08 04:47:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.498507462686567) internal successors, (502), 335 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:47:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 502 transitions. [2025-03-08 04:47:05,977 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 502 transitions. Word has length 29 [2025-03-08 04:47:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:47:05,977 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 502 transitions. [2025-03-08 04:47:05,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2025-03-08 04:47:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 502 transitions. [2025-03-08 04:47:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-08 04:47:05,978 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:47:05,978 INFO L218 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:47:05,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 04:47:06,182 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,SelfDestructingSolverStorable22 [2025-03-08 04:47:06,182 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:47:06,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:47:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash -627980466, now seen corresponding path program 16 times [2025-03-08 04:47:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:47:06,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638597384] [2025-03-08 04:47:06,182 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:47:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:47:06,185 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-08 04:47:06,191 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 04:47:06,191 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:47:06,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:47:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 04:47:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 04:47:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638597384] [2025-03-08 04:47:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638597384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 04:47:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302812299] [2025-03-08 04:47:06,420 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 04:47:06,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 04:47:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 04:47:06,422 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) [2025-03-08 04:47:06,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 04:47:06,448 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-08 04:47:06,462 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 04:47:06,462 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 04:47:06,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 04:47:06,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-08 04:47:06,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 04:47:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 04:47:06,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 04:47:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 04:47:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302812299] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 04:47:06,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 04:47:06,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2025-03-08 04:47:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917223496] [2025-03-08 04:47:06,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 04:47:06,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 04:47:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 04:47:06,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 04:47:06,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 04:47:06,990 INFO L87 Difference]: Start difference. First operand 336 states and 502 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2025-03-08 04:47:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 04:47:37,776 INFO L93 Difference]: Finished difference Result 1079 states and 1571 transitions. [2025-03-08 04:47:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2025-03-08 04:47:37,776 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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 31 [2025-03-08 04:47:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 04:47:37,779 INFO L225 Difference]: With dead ends: 1079 [2025-03-08 04:47:37,779 INFO L226 Difference]: Without dead ends: 1009 [2025-03-08 04:47:37,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25094 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=13370, Invalid=47886, Unknown=0, NotChecked=0, Total=61256 [2025-03-08 04:47:37,783 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 1481 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2025-03-08 04:47:37,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 241 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2025-03-08 04:47:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2025-03-08 04:47:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 388. [2025-03-08 04:47:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.516795865633075) internal successors, (587), 387 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 04:47:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 587 transitions. [2025-03-08 04:47:38,026 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 587 transitions. Word has length 31 [2025-03-08 04:47:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 04:47:38,026 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 587 transitions. [2025-03-08 04:47:38,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2025-03-08 04:47:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 587 transitions. [2025-03-08 04:47:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 04:47:38,027 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 04:47:38,027 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 04:47:38,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 04:47:38,227 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,SelfDestructingSolverStorable23 [2025-03-08 04:47:38,228 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 04:47:38,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 04:47:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1932850363, now seen corresponding path program 17 times [2025-03-08 04:47:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 04:47:38,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898324376] [2025-03-08 04:47:38,228 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 04:47:38,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 04:47:38,231 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 4 equivalence classes. [2025-03-08 04:47:38,257 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 04:47:38,257 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 04:47:38,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat