./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/max60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/max60-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:31:49,273 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:31:49,326 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:31:49,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:31:49,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:31:49,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:31:49,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:31:49,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:31:49,353 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:31:49,353 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:31:49,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:31:49,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:31:49,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:31:49,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:31:49,354 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:31:49,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:31:49,354 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:31:49,354 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:31:49,355 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:31:49,356 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:31:49,356 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:31:49,356 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:31:49,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:31:49,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:31:49,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:31:49,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:31:49,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:31:49,357 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 -> 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d [2025-03-16 13:31:49,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:31:49,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:31:49,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:31:49,555 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:31:49,555 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:31:49,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/max60-2.i [2025-03-16 13:31:50,652 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85d00e109/84b900db8f9b477bab5059041120232d/FLAG168c915b2 [2025-03-16 13:31:50,850 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:31:50,851 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/max60-2.i [2025-03-16 13:31:50,856 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85d00e109/84b900db8f9b477bab5059041120232d/FLAG168c915b2 [2025-03-16 13:31:50,866 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85d00e109/84b900db8f9b477bab5059041120232d [2025-03-16 13:31:50,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:31:50,868 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:31:50,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:31:50,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:31:50,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:31:50,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:31:50" (1/1) ... [2025-03-16 13:31:50,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f693a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:50, skipping insertion in model container [2025-03-16 13:31:50,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:31:50" (1/1) ... [2025-03-16 13:31:50,886 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:31:50,997 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/reducercommutativity/max60-2.i[1290,1303] [2025-03-16 13:31:50,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:31:51,009 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:31:51,025 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/reducercommutativity/max60-2.i[1290,1303] [2025-03-16 13:31:51,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:31:51,041 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:31:51,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51 WrapperNode [2025-03-16 13:31:51,042 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:31:51,043 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:31:51,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:31:51,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:31:51,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,065 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2025-03-16 13:31:51,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:31:51,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:31:51,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:31:51,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:31:51,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,075 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,090 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2025-03-16 13:31:51,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,098 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:31:51,104 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:31:51,104 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:31:51,104 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:31:51,105 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (1/1) ... [2025-03-16 13:31:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:31:51,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:51,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 13:31:51,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure max [2025-03-16 13:31:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:31:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:31:51,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:31:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:31:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:31:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:31:51,218 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:31:51,220 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:31:51,335 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L28: call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-03-16 13:31:51,342 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2025-03-16 13:31:51,342 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:31:51,349 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:31:51,349 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:31:51,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:31:51 BoogieIcfgContainer [2025-03-16 13:31:51,349 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:31:51,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:31:51,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:31:51,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:31:51,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:31:50" (1/3) ... [2025-03-16 13:31:51,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec7e55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:31:51, skipping insertion in model container [2025-03-16 13:31:51,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:31:51" (2/3) ... [2025-03-16 13:31:51,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec7e55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:31:51, skipping insertion in model container [2025-03-16 13:31:51,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:31:51" (3/3) ... [2025-03-16 13:31:51,357 INFO L128 eAbstractionObserver]: Analyzing ICFG max60-2.i [2025-03-16 13:31:51,366 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:31:51,368 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG max60-2.i that has 2 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:31:51,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:31:51,408 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;@26d3caed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:31:51,408 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:31:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:31:51,415 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:51,415 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:51,415 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:51,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1091540240, now seen corresponding path program 1 times [2025-03-16 13:31:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421975208] [2025-03-16 13:31:51,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:51,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 13:31:51,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 13:31:51,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:51,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:31:51,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:51,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421975208] [2025-03-16 13:31:51,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421975208] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:31:51,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:31:51,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:31:51,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274810489] [2025-03-16 13:31:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:31:51,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:31:51,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:51,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:31:51,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:31:51,650 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 13:31:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:51,675 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2025-03-16 13:31:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:31:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2025-03-16 13:31:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:51,685 INFO L225 Difference]: With dead ends: 43 [2025-03-16 13:31:51,685 INFO L226 Difference]: Without dead ends: 19 [2025-03-16 13:31:51,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:31:51,690 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:51,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-16 13:31:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-03-16 13:31:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2025-03-16 13:31:51,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 23 [2025-03-16 13:31:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:51,713 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2025-03-16 13:31:51,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 13:31:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2025-03-16 13:31:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:31:51,715 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:51,715 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:51,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:31:51,716 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:51,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1726708840, now seen corresponding path program 1 times [2025-03-16 13:31:51,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:51,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349929488] [2025-03-16 13:31:51,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:51,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:31:51,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:31:51,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:51,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 13:31:51,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:51,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349929488] [2025-03-16 13:31:51,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349929488] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896008407] [2025-03-16 13:31:51,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:51,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:51,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:51,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:31:51,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:31:51,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:31:51,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:51,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:51,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 13:31:51,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 13:31:51,924 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:31:51,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896008407] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:31:51,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:31:51,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 13:31:51,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695371549] [2025-03-16 13:31:51,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:31:51,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:31:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:51,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:31:51,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:31:51,926 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 13:31:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:51,942 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2025-03-16 13:31:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:31:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2025-03-16 13:31:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:51,944 INFO L225 Difference]: With dead ends: 37 [2025-03-16 13:31:51,944 INFO L226 Difference]: Without dead ends: 22 [2025-03-16 13:31:51,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:31:51,945 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 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 [2025-03-16 13:31:51,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-16 13:31:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2025-03-16 13:31:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2025-03-16 13:31:51,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 24 [2025-03-16 13:31:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:51,950 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2025-03-16 13:31:51,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 13:31:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2025-03-16 13:31:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:31:51,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:51,951 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:51,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:31:52,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:52,152 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:52,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 475225173, now seen corresponding path program 1 times [2025-03-16 13:31:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601433641] [2025-03-16 13:31:52,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:52,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 13:31:52,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:31:52,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:52,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 13:31:52,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:52,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601433641] [2025-03-16 13:31:52,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601433641] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:52,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172883607] [2025-03-16 13:31:52,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:52,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:52,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:31:52,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-16 13:31:52,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:31:52,318 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:52,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:52,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 13:31:52,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-16 13:31:52,334 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:31:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172883607] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:31:52,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 13:31:52,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 13:31:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574684395] [2025-03-16 13:31:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:31:52,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:31:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:52,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:31:52,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:31:52,336 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 13:31:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:52,347 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2025-03-16 13:31:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:31:52,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2025-03-16 13:31:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:52,348 INFO L225 Difference]: With dead ends: 33 [2025-03-16 13:31:52,349 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 13:31:52,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:31:52,350 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:52,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 13:31:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-16 13:31:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2025-03-16 13:31:52,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 33 [2025-03-16 13:31:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:52,354 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2025-03-16 13:31:52,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 13:31:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2025-03-16 13:31:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:31:52,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:52,355 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:52,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:31:52,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-16 13:31:52,556 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:52,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:52,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1988187491, now seen corresponding path program 1 times [2025-03-16 13:31:52,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:52,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061493752] [2025-03-16 13:31:52,558 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:52,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:52,569 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 13:31:52,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:31:52,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:52,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 13:31:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061493752] [2025-03-16 13:31:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061493752] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141565645] [2025-03-16 13:31:52,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:31:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:52,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:52,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:31:52,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 13:31:52,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:31:52,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:52,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:52,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:31:52,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 13:31:52,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 13:31:52,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141565645] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:52,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:52,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2025-03-16 13:31:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362012200] [2025-03-16 13:31:52,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:52,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 13:31:52,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:52,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 13:31:52,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:31:52,774 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 13:31:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:52,788 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2025-03-16 13:31:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:31:52,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 34 [2025-03-16 13:31:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:52,789 INFO L225 Difference]: With dead ends: 42 [2025-03-16 13:31:52,789 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 13:31:52,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:31:52,790 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:52,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 13:31:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-16 13:31:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2025-03-16 13:31:52,794 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 34 [2025-03-16 13:31:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:52,794 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2025-03-16 13:31:52,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 13:31:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2025-03-16 13:31:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 13:31:52,794 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:52,794 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:52,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:31:52,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:52,995 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:52,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1132745227, now seen corresponding path program 2 times [2025-03-16 13:31:52,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:52,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328856335] [2025-03-16 13:31:52,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:53,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-16 13:31:53,031 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:31:53,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:53,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-16 13:31:53,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:53,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328856335] [2025-03-16 13:31:53,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328856335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:53,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744810627] [2025-03-16 13:31:53,107 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:53,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:53,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:53,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:53,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:31:53,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-16 13:31:53,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 13:31:53,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:53,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:53,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:31:53,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 13:31:53,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 13:31:53,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744810627] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:53,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:53,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2025-03-16 13:31:53,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804499438] [2025-03-16 13:31:53,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:53,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:31:53,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:53,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:31:53,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:31:53,318 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 13:31:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:53,357 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2025-03-16 13:31:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:31:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2025-03-16 13:31:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:53,359 INFO L225 Difference]: With dead ends: 53 [2025-03-16 13:31:53,359 INFO L226 Difference]: Without dead ends: 35 [2025-03-16 13:31:53,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:31:53,359 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:53,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-16 13:31:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2025-03-16 13:31:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2025-03-16 13:31:53,365 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2025-03-16 13:31:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:53,365 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2025-03-16 13:31:53,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 13:31:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2025-03-16 13:31:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 13:31:53,366 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:53,366 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:53,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:31:53,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:53,567 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:53,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash -191469340, now seen corresponding path program 3 times [2025-03-16 13:31:53,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:53,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284933784] [2025-03-16 13:31:53,567 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:53,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:53,585 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 52 statements into 6 equivalence classes. [2025-03-16 13:31:53,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 52 statements. [2025-03-16 13:31:53,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:31:53,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-16 13:31:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284933784] [2025-03-16 13:31:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284933784] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398137263] [2025-03-16 13:31:53,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:53,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:53,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:53,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:31:53,696 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 52 statements into 6 equivalence classes. [2025-03-16 13:31:53,717 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 52 statements. [2025-03-16 13:31:53,717 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:31:53,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:53,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 13:31:53,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-16 13:31:53,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-16 13:31:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398137263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:53,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:53,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-16 13:31:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199408029] [2025-03-16 13:31:53,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:53,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 13:31:53,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:53,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 13:31:53,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:31:53,761 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:31:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:53,775 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2025-03-16 13:31:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:31:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2025-03-16 13:31:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:53,776 INFO L225 Difference]: With dead ends: 51 [2025-03-16 13:31:53,777 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 13:31:53,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:31:53,778 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:53,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 13:31:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-03-16 13:31:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2025-03-16 13:31:53,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 52 [2025-03-16 13:31:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:53,783 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2025-03-16 13:31:53,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:31:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2025-03-16 13:31:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 13:31:53,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:53,784 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:53,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:31:53,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:53,985 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:53,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:53,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1434208368, now seen corresponding path program 4 times [2025-03-16 13:31:53,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:53,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414239587] [2025-03-16 13:31:53,985 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:31:53,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:54,004 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:31:54,020 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 13:31:54,023 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:31:54,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-16 13:31:54,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414239587] [2025-03-16 13:31:54,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414239587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103374048] [2025-03-16 13:31:54,094 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:31:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:54,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:54,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:31:54,151 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 55 statements into 2 equivalence classes. [2025-03-16 13:31:54,199 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 13:31:54,200 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:31:54,200 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:54,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:31:54,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2025-03-16 13:31:54,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-16 13:31:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103374048] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:54,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:54,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-16 13:31:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110988894] [2025-03-16 13:31:54,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:54,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 13:31:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:54,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 13:31:54,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:31:54,263 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 13:31:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:54,294 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2025-03-16 13:31:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:31:54,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2025-03-16 13:31:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:54,296 INFO L225 Difference]: With dead ends: 71 [2025-03-16 13:31:54,296 INFO L226 Difference]: Without dead ends: 48 [2025-03-16 13:31:54,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:31:54,297 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:54,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 59 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-16 13:31:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-03-16 13:31:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2025-03-16 13:31:54,305 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 55 [2025-03-16 13:31:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:54,305 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2025-03-16 13:31:54,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 13:31:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2025-03-16 13:31:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-16 13:31:54,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:54,307 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:54,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:31:54,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:54,507 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:54,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1580294960, now seen corresponding path program 5 times [2025-03-16 13:31:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969514800] [2025-03-16 13:31:54,508 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:31:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:54,528 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 91 statements into 14 equivalence classes. [2025-03-16 13:31:54,608 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 81 of 91 statements. [2025-03-16 13:31:54,608 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-16 13:31:54,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 123 proven. 174 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2025-03-16 13:31:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969514800] [2025-03-16 13:31:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969514800] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631456505] [2025-03-16 13:31:54,760 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:31:54,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:54,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:54,762 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:54,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:31:54,845 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 91 statements into 14 equivalence classes. [2025-03-16 13:31:55,047 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 81 of 91 statements. [2025-03-16 13:31:55,047 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-16 13:31:55,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:55,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:31:55,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2025-03-16 13:31:55,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2025-03-16 13:31:55,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631456505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:55,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:55,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-16 13:31:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805827613] [2025-03-16 13:31:55,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:55,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 13:31:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:55,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 13:31:55,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:31:55,184 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 13:31:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:55,250 INFO L93 Difference]: Finished difference Result 107 states and 144 transitions. [2025-03-16 13:31:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:31:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2025-03-16 13:31:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:55,254 INFO L225 Difference]: With dead ends: 107 [2025-03-16 13:31:55,254 INFO L226 Difference]: Without dead ends: 72 [2025-03-16 13:31:55,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:31:55,254 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:55,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 118 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:31:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-16 13:31:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-03-16 13:31:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2025-03-16 13:31:55,262 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 91 [2025-03-16 13:31:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:55,264 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2025-03-16 13:31:55,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 13:31:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2025-03-16 13:31:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2025-03-16 13:31:55,265 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:55,265 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:55,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:31:55,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:55,466 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:55,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash -442988720, now seen corresponding path program 6 times [2025-03-16 13:31:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:55,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479531724] [2025-03-16 13:31:55,466 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:31:55,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:55,489 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 163 statements into 30 equivalence classes. [2025-03-16 13:31:55,519 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 51 of 163 statements. [2025-03-16 13:31:55,519 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 13:31:55,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479531724] [2025-03-16 13:31:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479531724] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337598016] [2025-03-16 13:31:55,655 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:31:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:55,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:55,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:31:55,742 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 163 statements into 30 equivalence classes. [2025-03-16 13:31:55,787 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 51 of 163 statements. [2025-03-16 13:31:55,787 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 13:31:55,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:55,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:31:55,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 1240 proven. 10 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2025-03-16 13:31:55,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2786 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:55,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337598016] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:55,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:55,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-16 13:31:55,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56749338] [2025-03-16 13:31:55,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:55,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:31:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:55,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:31:55,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:31:55,895 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:31:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:55,917 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2025-03-16 13:31:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:31:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 163 [2025-03-16 13:31:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:55,918 INFO L225 Difference]: With dead ends: 129 [2025-03-16 13:31:55,918 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 13:31:55,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:31:55,919 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:55,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 13:31:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-16 13:31:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2025-03-16 13:31:55,931 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 163 [2025-03-16 13:31:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:55,931 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2025-03-16 13:31:55,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:31:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2025-03-16 13:31:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2025-03-16 13:31:55,933 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:55,933 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:55,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:31:56,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-16 13:31:56,138 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:56,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1217935664, now seen corresponding path program 7 times [2025-03-16 13:31:56,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:56,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516943220] [2025-03-16 13:31:56,139 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:31:56,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:56,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-03-16 13:31:56,190 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-03-16 13:31:56,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:56,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:56,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516943220] [2025-03-16 13:31:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516943220] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838203731] [2025-03-16 13:31:56,567 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:31:56,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:56,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:56,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:56,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:31:56,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 169 statements into 1 equivalence classes. [2025-03-16 13:31:56,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 169 of 169 statements. [2025-03-16 13:31:56,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:31:56,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:56,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:31:56,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:56,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2831 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838203731] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:56,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2025-03-16 13:31:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078478725] [2025-03-16 13:31:56,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:56,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-16 13:31:56,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:56,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-16 13:31:56,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:31:56,963 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 13:31:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:56,990 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2025-03-16 13:31:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:31:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 169 [2025-03-16 13:31:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:56,991 INFO L225 Difference]: With dead ends: 156 [2025-03-16 13:31:56,991 INFO L226 Difference]: Without dead ends: 90 [2025-03-16 13:31:56,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:31:56,992 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:56,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-16 13:31:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2025-03-16 13:31:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2025-03-16 13:31:56,997 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 169 [2025-03-16 13:31:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:56,997 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2025-03-16 13:31:56,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 13:31:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2025-03-16 13:31:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2025-03-16 13:31:56,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:56,998 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 22, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:57,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 13:31:57,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:31:57,199 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:57,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1962670896, now seen corresponding path program 8 times [2025-03-16 13:31:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873779463] [2025-03-16 13:31:57,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:57,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 181 statements into 2 equivalence classes. [2025-03-16 13:31:57,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 181 of 181 statements. [2025-03-16 13:31:57,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:57,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:57,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873779463] [2025-03-16 13:31:57,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873779463] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377123399] [2025-03-16 13:31:57,950 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:31:57,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:57,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:57,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:57,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:31:58,061 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 181 statements into 2 equivalence classes. [2025-03-16 13:31:58,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 181 of 181 statements. [2025-03-16 13:31:58,141 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:31:58,141 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:58,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 13:31:58,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:58,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:31:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3029 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2025-03-16 13:31:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377123399] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:31:58,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:31:58,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2025-03-16 13:31:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6934359] [2025-03-16 13:31:58,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:31:58,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-16 13:31:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:31:58,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-16 13:31:58,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 13:31:58,810 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 13:31:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:31:58,851 INFO L93 Difference]: Finished difference Result 180 states and 239 transitions. [2025-03-16 13:31:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:31:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 181 [2025-03-16 13:31:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:31:58,852 INFO L225 Difference]: With dead ends: 180 [2025-03-16 13:31:58,852 INFO L226 Difference]: Without dead ends: 114 [2025-03-16 13:31:58,853 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 13:31:58,853 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:31:58,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:31:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-16 13:31:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2025-03-16 13:31:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:31:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2025-03-16 13:31:58,866 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 181 [2025-03-16 13:31:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:31:58,866 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2025-03-16 13:31:58,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 13:31:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2025-03-16 13:31:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2025-03-16 13:31:58,868 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:31:58,868 INFO L218 NwaCegarLoop]: trace histogram [46, 42, 42, 42, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:31:58,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 13:31:59,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-16 13:31:59,069 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:31:59,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:31:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 41255120, now seen corresponding path program 9 times [2025-03-16 13:31:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:31:59,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523076366] [2025-03-16 13:31:59,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:31:59,101 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 205 statements into 30 equivalence classes. [2025-03-16 13:31:59,170 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 72 of 205 statements. [2025-03-16 13:31:59,170 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:31:59,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2025-03-16 13:31:59,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:31:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523076366] [2025-03-16 13:31:59,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523076366] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:31:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304074519] [2025-03-16 13:31:59,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:31:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:31:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:31:59,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:31:59,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:31:59,487 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 205 statements into 30 equivalence classes. [2025-03-16 13:31:59,810 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 72 of 205 statements. [2025-03-16 13:31:59,810 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-16 13:31:59,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:31:59,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 13:31:59,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:31:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 1240 proven. 55 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2025-03-16 13:31:59,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:32:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3802 trivial. 0 not checked. [2025-03-16 13:32:00,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304074519] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:32:00,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:32:00,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2025-03-16 13:32:00,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273347312] [2025-03-16 13:32:00,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:32:00,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 13:32:00,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:32:00,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 13:32:00,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:32:00,033 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:32:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:32:00,062 INFO L93 Difference]: Finished difference Result 177 states and 221 transitions. [2025-03-16 13:32:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:32:00,063 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 205 [2025-03-16 13:32:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:32:00,064 INFO L225 Difference]: With dead ends: 177 [2025-03-16 13:32:00,064 INFO L226 Difference]: Without dead ends: 126 [2025-03-16 13:32:00,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2025-03-16 13:32:00,064 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:32:00,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:32:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-03-16 13:32:00,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2025-03-16 13:32:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.140495867768595) internal successors, (138), 121 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:32:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2025-03-16 13:32:00,076 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 205 [2025-03-16 13:32:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:32:00,077 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2025-03-16 13:32:00,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 13:32:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2025-03-16 13:32:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-03-16 13:32:00,078 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:32:00,078 INFO L218 NwaCegarLoop]: trace histogram [46, 42, 42, 42, 22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:32:00,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 13:32:00,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:32:00,279 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:32:00,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:32:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 861675472, now seen corresponding path program 10 times [2025-03-16 13:32:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:32:00,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121498190] [2025-03-16 13:32:00,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:32:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:32:00,313 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 217 statements into 2 equivalence classes. [2025-03-16 13:32:00,356 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 217 of 217 statements. [2025-03-16 13:32:00,357 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:32:00,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:32:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2025-03-16 13:32:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:32:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121498190] [2025-03-16 13:32:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121498190] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:32:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053779705] [2025-03-16 13:32:00,772 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:32:00,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:32:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:32:00,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:32:00,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:32:00,911 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 217 statements into 2 equivalence classes. [2025-03-16 13:32:01,037 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 217 of 217 statements. [2025-03-16 13:32:01,038 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:32:01,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:32:01,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:32:01,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:32:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2025-03-16 13:32:01,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:32:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2025-03-16 13:32:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053779705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:32:01,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:32:01,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-16 13:32:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036138985] [2025-03-16 13:32:01,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:32:01,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 13:32:01,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:32:01,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 13:32:01,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:32:01,421 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 13:32:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:32:01,530 INFO L93 Difference]: Finished difference Result 251 states and 320 transitions. [2025-03-16 13:32:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 13:32:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 217 [2025-03-16 13:32:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:32:01,534 INFO L225 Difference]: With dead ends: 251 [2025-03-16 13:32:01,535 INFO L226 Difference]: Without dead ends: 174 [2025-03-16 13:32:01,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:32:01,536 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:32:01,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 117 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:32:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2025-03-16 13:32:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2025-03-16 13:32:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1952662721893492) internal successors, (202), 169 states have internal predecessors, (202), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 13:32:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2025-03-16 13:32:01,552 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 217 [2025-03-16 13:32:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:32:01,552 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2025-03-16 13:32:01,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 13:32:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2025-03-16 13:32:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2025-03-16 13:32:01,556 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:32:01,556 INFO L218 NwaCegarLoop]: trace histogram [90, 90, 90, 46, 22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:32:01,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 13:32:01,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:32:01,756 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:32:01,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:32:01,757 INFO L85 PathProgramCache]: Analyzing trace with hash 763786448, now seen corresponding path program 11 times [2025-03-16 13:32:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:32:01,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875634140] [2025-03-16 13:32:01,757 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:32:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:32:01,800 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 361 statements into 62 equivalence classes. [2025-03-16 13:32:03,211 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) and asserted 351 of 361 statements. [2025-03-16 13:32:03,211 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2025-03-16 13:32:03,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:32:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13631 backedges. 2763 proven. 4098 refuted. 0 times theorem prover too weak. 6770 trivial. 0 not checked. [2025-03-16 13:32:04,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:32:04,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875634140] [2025-03-16 13:32:04,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875634140] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:32:04,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967513236] [2025-03-16 13:32:04,243 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:32:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:32:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:32:04,245 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:32:04,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:32:04,426 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 361 statements into 62 equivalence classes.