./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:44:45,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:44:45,418 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:44:45,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:44:45,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:44:45,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:44:45,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:44:45,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:44:45,446 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:44:45,447 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:44:45,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:44:45,447 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:44:45,448 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:44:45,448 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:44:45,448 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:44:45,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:44:45,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:44:45,449 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:44:45,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:45,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:44:45,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:44:45,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:44:45,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:44:45,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:44:45,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:44:45,451 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:44:45,451 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 -> e0068f83ad7eb3861b59041e8ebf2a38df44c3a60c0fafaf2450f6b793a60fbe [2025-03-08 05:44:45,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:44:45,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:44:45,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:44:45,660 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:44:45,660 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:44:45,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2025-03-08 05:44:46,764 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c462aa89/ac02ee029b51420fa2340daea0ef3a39/FLAG7c1113222 [2025-03-08 05:44:46,954 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:44:46,956 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2025-03-08 05:44:46,972 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c462aa89/ac02ee029b51420fa2340daea0ef3a39/FLAG7c1113222 [2025-03-08 05:44:47,328 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c462aa89/ac02ee029b51420fa2340daea0ef3a39 [2025-03-08 05:44:47,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:44:47,332 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:44:47,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:47,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:44:47,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:44:47,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f809624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47, skipping insertion in model container [2025-03-08 05:44:47,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,348 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:44:47,435 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c[946,959] [2025-03-08 05:44:47,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:47,444 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:44:47,453 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c[946,959] [2025-03-08 05:44:47,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:47,463 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:44:47,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47 WrapperNode [2025-03-08 05:44:47,464 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:47,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:47,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:44:47,464 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:44:47,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,483 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-08 05:44:47,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:47,485 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:44:47,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:44:47,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:44:47,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,500 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 05:44:47,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,501 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,505 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:44:47,507 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:44:47,507 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:44:47,507 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:44:47,508 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (1/1) ... [2025-03-08 05:44:47,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:47,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:47,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:44:47,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:44:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:44:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:44:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-08 05:44:47,553 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-08 05:44:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-08 05:44:47,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-08 05:44:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:44:47,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:44:47,597 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:44:47,599 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:44:47,669 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-08 05:44:47,683 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:44:47,688 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-08 05:44:47,688 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:44:47,694 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:44:47,694 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:44:47,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:47 BoogieIcfgContainer [2025-03-08 05:44:47,694 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:44:47,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:44:47,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:44:47,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:44:47,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:44:47" (1/3) ... [2025-03-08 05:44:47,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f59bffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:47, skipping insertion in model container [2025-03-08 05:44:47,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:47" (2/3) ... [2025-03-08 05:44:47,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f59bffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:47, skipping insertion in model container [2025-03-08 05:44:47,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:47" (3/3) ... [2025-03-08 05:44:47,703 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2025-03-08 05:44:47,716 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:44:47,717 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_6-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:44:47,755 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:44:47,765 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;@2b22e8ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:44:47,766 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:44:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:44:47,773 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:47,773 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:47,774 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:47,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-08 05:44:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216114724] [2025-03-08 05:44:47,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:47,825 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:44:47,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:44:47,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:47,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:47,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:47,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216114724] [2025-03-08 05:44:47,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216114724] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:47,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586905629] [2025-03-08 05:44:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:47,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:47,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:47,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:47,958 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:48,039 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-03-08 05:44:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:48,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-08 05:44:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:48,045 INFO L225 Difference]: With dead ends: 41 [2025-03-08 05:44:48,045 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:48,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:48,049 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:48,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:44:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:48,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-08 05:44:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:48,078 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:48,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:44:48,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:48,080 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:48,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:44:48,081 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:48,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:48,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-08 05:44:48,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:48,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308880720] [2025-03-08 05:44:48,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:48,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:48,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:44:48,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:44:48,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:48,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308880720] [2025-03-08 05:44:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308880720] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890154100] [2025-03-08 05:44:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:48,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:48,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:48,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:48,136 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:48,181 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-08 05:44:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:48,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 05:44:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:48,182 INFO L225 Difference]: With dead ends: 33 [2025-03-08 05:44:48,182 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:48,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:48,183 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:48,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:44:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:48,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-08 05:44:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:48,190 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:48,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:44:48,192 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:48,192 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:48,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:44:48,192 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:48,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-08 05:44:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074528035] [2025-03-08 05:44:48,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:48,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:48,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:48,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:48,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074528035] [2025-03-08 05:44:48,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074528035] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:48,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316553301] [2025-03-08 05:44:48,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:48,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:48,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:48,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:44:48,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:48,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:48,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:48,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:48,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:48,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:48,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:48,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316553301] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:48,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:48,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-08 05:44:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882955259] [2025-03-08 05:44:48,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:48,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:44:48,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:48,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:44:48,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:44:48,603 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:44:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:48,711 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-08 05:44:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:44:48,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-08 05:44:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:48,712 INFO L225 Difference]: With dead ends: 55 [2025-03-08 05:44:48,712 INFO L226 Difference]: Without dead ends: 31 [2025-03-08 05:44:48,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:48,713 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:48,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-08 05:44:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-08 05:44:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-08 05:44:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-08 05:44:48,718 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-08 05:44:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:48,718 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-08 05:44:48,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:44:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-08 05:44:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:44:48,719 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:48,719 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:48,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:44:48,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:48,919 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:48,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-08 05:44:48,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:48,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2867365] [2025-03-08 05:44:48,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:48,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:48,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:48,938 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:48,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:48,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2867365] [2025-03-08 05:44:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2867365] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075721289] [2025-03-08 05:44:49,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:49,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:49,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:44:49,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:49,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:49,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:49,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:49,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:49,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:49,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075721289] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:49,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-08 05:44:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628308943] [2025-03-08 05:44:49,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:49,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:44:49,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:49,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:44:49,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:44:49,230 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:49,328 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-08 05:44:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:44:49,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-08 05:44:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:49,329 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:44:49,329 INFO L226 Difference]: Without dead ends: 36 [2025-03-08 05:44:49,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:44:49,330 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:49,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-08 05:44:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-08 05:44:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-08 05:44:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-08 05:44:49,335 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-08 05:44:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:49,335 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-08 05:44:49,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-08 05:44:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 05:44:49,336 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:49,336 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:49,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:49,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 05:44:49,537 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:49,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-08 05:44:49,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:49,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126466499] [2025-03-08 05:44:49,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:49,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:49,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:49,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:49,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:49,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:49,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126466499] [2025-03-08 05:44:49,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126466499] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:49,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554902324] [2025-03-08 05:44:49,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:49,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:49,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:49,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:44:49,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:49,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:49,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:49,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:49,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:49,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:44:49,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:44:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554902324] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:50,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:50,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-08 05:44:50,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56972468] [2025-03-08 05:44:50,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:50,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:44:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:50,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:44:50,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:50,008 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:50,133 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-08 05:44:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:44:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-03-08 05:44:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:50,134 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:44:50,134 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 05:44:50,134 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:44:50,136 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:50,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 05:44:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-08 05:44:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:44:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-08 05:44:50,141 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-08 05:44:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:50,141 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-08 05:44:50,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-08 05:44:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:44:50,142 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:50,142 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:50,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:50,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:50,344 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:50,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-08 05:44:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:50,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926372335] [2025-03-08 05:44:50,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:50,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:44:50,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:44:50,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:50,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 05:44:50,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:50,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926372335] [2025-03-08 05:44:50,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926372335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:50,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819364186] [2025-03-08 05:44:50,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:50,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:50,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:50,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:50,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:44:50,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:44:50,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:44:50,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:50,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:50,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:50,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:50,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:44:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819364186] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:50,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:50,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-08 05:44:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149833798] [2025-03-08 05:44:50,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:50,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:44:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:50,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:44:50,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:44:50,852 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:51,146 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-08 05:44:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:44:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-03-08 05:44:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:51,147 INFO L225 Difference]: With dead ends: 101 [2025-03-08 05:44:51,149 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 05:44:51,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:44:51,151 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:51,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 05:44:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-08 05:44:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-08 05:44:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-08 05:44:51,160 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-08 05:44:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:51,160 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-08 05:44:51,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:44:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-08 05:44:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 05:44:51,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:51,162 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:51,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:51,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:51,362 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:51,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:51,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-08 05:44:51,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:51,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923190067] [2025-03-08 05:44:51,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:51,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:51,367 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:44:51,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:44:51,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:51,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:44:51,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:51,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923190067] [2025-03-08 05:44:51,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923190067] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660996273] [2025-03-08 05:44:51,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:51,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:51,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:51,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:44:51,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:44:51,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:44:51,508 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:51,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:51,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:44:51,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-08 05:44:51,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:44:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660996273] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:51,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:51,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-08 05:44:51,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170539157] [2025-03-08 05:44:51,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:51,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:44:51,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:51,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:44:51,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:44:51,970 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:44:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:52,125 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-08 05:44:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-03-08 05:44:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:52,128 INFO L225 Difference]: With dead ends: 102 [2025-03-08 05:44:52,128 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 05:44:52,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:44:52,129 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:52,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 05:44:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-08 05:44:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-08 05:44:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-08 05:44:52,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-08 05:44:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:52,146 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-08 05:44:52,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:44:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-08 05:44:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-08 05:44:52,148 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:52,149 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:52,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:52,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:52,353 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:52,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-08 05:44:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:52,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835099571] [2025-03-08 05:44:52,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:52,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:52,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:44:52,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:44:52,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:52,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-08 05:44:52,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:52,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835099571] [2025-03-08 05:44:52,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835099571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:52,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823454677] [2025-03-08 05:44:52,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:52,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:52,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:52,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:44:52,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:44:52,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:44:52,588 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:52,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:52,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:44:52,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-08 05:44:52,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-08 05:44:53,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823454677] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:53,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:53,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 22 [2025-03-08 05:44:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750562509] [2025-03-08 05:44:53,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:53,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:44:53,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:53,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:44:53,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:44:53,350 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 10 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-08 05:44:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:53,822 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-08 05:44:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:44:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 10 states have call predecessors, (26), 17 states have call successors, (26) Word has length 107 [2025-03-08 05:44:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:53,824 INFO L225 Difference]: With dead ends: 177 [2025-03-08 05:44:53,825 INFO L226 Difference]: Without dead ends: 104 [2025-03-08 05:44:53,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 05:44:53,826 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:53,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 395 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:44:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-08 05:44:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-08 05:44:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-08 05:44:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-08 05:44:53,836 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-08 05:44:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:53,836 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-08 05:44:53,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 10 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-08 05:44:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-08 05:44:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-08 05:44:53,838 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:53,838 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:53,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:44:54,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:54,043 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:54,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:54,043 INFO L85 PathProgramCache]: Analyzing trace with hash 830576147, now seen corresponding path program 1 times [2025-03-08 05:44:54,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:54,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182629877] [2025-03-08 05:44:54,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:54,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-08 05:44:54,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-08 05:44:54,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:54,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-08 05:44:54,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182629877] [2025-03-08 05:44:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182629877] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466668800] [2025-03-08 05:44:54,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:54,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:54,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:54,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:54,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:44:54,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-08 05:44:54,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-08 05:44:54,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:54,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:54,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:44:54,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-08 05:44:54,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 144 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2025-03-08 05:44:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466668800] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:54,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:54,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 15 [2025-03-08 05:44:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073712139] [2025-03-08 05:44:54,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:54,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:44:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:54,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:44:54,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:44:54,974 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 11 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2025-03-08 05:44:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:55,098 INFO L93 Difference]: Finished difference Result 130 states and 207 transitions. [2025-03-08 05:44:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:44:55,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 11 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) Word has length 133 [2025-03-08 05:44:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:55,100 INFO L225 Difference]: With dead ends: 130 [2025-03-08 05:44:55,100 INFO L226 Difference]: Without dead ends: 126 [2025-03-08 05:44:55,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 258 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:44:55,101 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:55,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 142 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-03-08 05:44:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2025-03-08 05:44:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 19 states have call successors, (19), 8 states have call predecessors, (19), 16 states have return successors, (63), 25 states have call predecessors, (63), 19 states have call successors, (63) [2025-03-08 05:44:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 162 transitions. [2025-03-08 05:44:55,119 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 162 transitions. Word has length 133 [2025-03-08 05:44:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:55,120 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 162 transitions. [2025-03-08 05:44:55,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 11 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2025-03-08 05:44:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 162 transitions. [2025-03-08 05:44:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2025-03-08 05:44:55,123 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:55,123 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 11, 11, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:55,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:44:55,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:55,324 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:55,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1038150560, now seen corresponding path program 2 times [2025-03-08 05:44:55,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:55,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235400272] [2025-03-08 05:44:55,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:55,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:55,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 175 statements into 2 equivalence classes. [2025-03-08 05:44:55,350 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 175 of 175 statements. [2025-03-08 05:44:55,350 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:55,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 65 proven. 158 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2025-03-08 05:44:55,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235400272] [2025-03-08 05:44:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235400272] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355533672] [2025-03-08 05:44:55,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:55,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:55,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:55,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:44:55,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 175 statements into 2 equivalence classes. [2025-03-08 05:44:55,567 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 175 of 175 statements. [2025-03-08 05:44:55,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:55,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:55,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:44:55,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 65 proven. 158 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2025-03-08 05:44:55,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 65 proven. 163 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2025-03-08 05:44:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355533672] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:56,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:56,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2025-03-08 05:44:56,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763365240] [2025-03-08 05:44:56,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:56,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:44:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:56,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:44:56,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:44:56,090 INFO L87 Difference]: Start difference. First operand 105 states and 162 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2025-03-08 05:44:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:56,182 INFO L93 Difference]: Finished difference Result 135 states and 241 transitions. [2025-03-08 05:44:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:44:56,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) Word has length 175 [2025-03-08 05:44:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:56,184 INFO L225 Difference]: With dead ends: 135 [2025-03-08 05:44:56,184 INFO L226 Difference]: Without dead ends: 131 [2025-03-08 05:44:56,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 343 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:44:56,185 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:56,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 125 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-03-08 05:44:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2025-03-08 05:44:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 19 states have call successors, (19), 8 states have call predecessors, (19), 16 states have return successors, (63), 25 states have call predecessors, (63), 19 states have call successors, (63) [2025-03-08 05:44:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 162 transitions. [2025-03-08 05:44:56,197 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 162 transitions. Word has length 175 [2025-03-08 05:44:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:56,197 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 162 transitions. [2025-03-08 05:44:56,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2025-03-08 05:44:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 162 transitions. [2025-03-08 05:44:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-08 05:44:56,198 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:56,198 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:56,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 05:44:56,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:44:56,399 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:56,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:56,399 INFO L85 PathProgramCache]: Analyzing trace with hash 141485422, now seen corresponding path program 3 times [2025-03-08 05:44:56,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:56,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648032624] [2025-03-08 05:44:56,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:56,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 7 equivalence classes. [2025-03-08 05:44:56,409 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 59 of 133 statements. [2025-03-08 05:44:56,409 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:44:56,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 95 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2025-03-08 05:44:56,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648032624] [2025-03-08 05:44:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648032624] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667335113] [2025-03-08 05:44:56,463 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:56,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:56,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:56,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:44:56,508 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 133 statements into 7 equivalence classes. [2025-03-08 05:44:56,519 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 59 of 133 statements. [2025-03-08 05:44:56,519 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:44:56,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:56,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:56,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 93 proven. 24 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-03-08 05:44:56,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2025-03-08 05:44:56,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667335113] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:56,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:56,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 12 [2025-03-08 05:44:56,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264901761] [2025-03-08 05:44:56,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:56,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:44:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:56,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:44:56,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:44:56,850 INFO L87 Difference]: Start difference. First operand 105 states and 162 transitions. Second operand has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (13), 1 states have call predecessors, (13), 4 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-08 05:44:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:56,934 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2025-03-08 05:44:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:44:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (13), 1 states have call predecessors, (13), 4 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 133 [2025-03-08 05:44:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:56,939 INFO L225 Difference]: With dead ends: 129 [2025-03-08 05:44:56,939 INFO L226 Difference]: Without dead ends: 125 [2025-03-08 05:44:56,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:56,940 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:56,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 116 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-08 05:44:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2025-03-08 05:44:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 22 states have call successors, (22), 9 states have call predecessors, (22), 17 states have return successors, (76), 28 states have call predecessors, (76), 22 states have call successors, (76) [2025-03-08 05:44:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 187 transitions. [2025-03-08 05:44:56,951 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 187 transitions. Word has length 133 [2025-03-08 05:44:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:56,951 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 187 transitions. [2025-03-08 05:44:56,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.454545454545454) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (13), 1 states have call predecessors, (13), 4 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-08 05:44:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 187 transitions. [2025-03-08 05:44:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2025-03-08 05:44:56,954 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:56,954 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:56,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:57,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:57,155 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:57,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash 344459161, now seen corresponding path program 4 times [2025-03-08 05:44:57,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:57,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627384604] [2025-03-08 05:44:57,155 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:57,161 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 214 statements into 2 equivalence classes. [2025-03-08 05:44:57,167 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 182 of 214 statements. [2025-03-08 05:44:57,167 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:57,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 160 proven. 143 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2025-03-08 05:44:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627384604] [2025-03-08 05:44:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627384604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253790025] [2025-03-08 05:44:57,299 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:57,301 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:57,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:44:57,355 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 214 statements into 2 equivalence classes. [2025-03-08 05:44:57,382 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 182 of 214 statements. [2025-03-08 05:44:57,382 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:57,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:57,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:57,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 187 proven. 218 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2025-03-08 05:44:57,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 187 proven. 232 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2025-03-08 05:44:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253790025] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:58,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:58,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 21 [2025-03-08 05:44:58,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790719300] [2025-03-08 05:44:58,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:58,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:44:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:58,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:44:58,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:44:58,411 INFO L87 Difference]: Start difference. First operand 116 states and 187 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) [2025-03-08 05:44:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:58,558 INFO L93 Difference]: Finished difference Result 151 states and 281 transitions. [2025-03-08 05:44:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) Word has length 214 [2025-03-08 05:44:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:58,560 INFO L225 Difference]: With dead ends: 151 [2025-03-08 05:44:58,560 INFO L226 Difference]: Without dead ends: 124 [2025-03-08 05:44:58,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 413 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:44:58,561 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:58,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 268 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-08 05:44:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2025-03-08 05:44:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 83 states have internal predecessors, (94), 23 states have call successors, (23), 9 states have call predecessors, (23), 19 states have return successors, (78), 31 states have call predecessors, (78), 23 states have call successors, (78) [2025-03-08 05:44:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 195 transitions. [2025-03-08 05:44:58,570 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 195 transitions. Word has length 214 [2025-03-08 05:44:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:58,570 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 195 transitions. [2025-03-08 05:44:58,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 14 states have call successors, (25) [2025-03-08 05:44:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 195 transitions. [2025-03-08 05:44:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2025-03-08 05:44:58,572 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:58,572 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:58,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:58,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 05:44:58,777 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:58,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2144739970, now seen corresponding path program 5 times [2025-03-08 05:44:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750428454] [2025-03-08 05:44:58,777 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:58,784 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 215 statements into 15 equivalence classes. [2025-03-08 05:44:58,791 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 75 of 215 statements. [2025-03-08 05:44:58,791 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:44:58,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 122 proven. 276 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2025-03-08 05:44:58,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:58,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750428454] [2025-03-08 05:44:58,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750428454] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:58,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188839051] [2025-03-08 05:44:58,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:58,885 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:58,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:44:58,946 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 215 statements into 15 equivalence classes. [2025-03-08 05:44:58,960 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 75 of 215 statements. [2025-03-08 05:44:58,960 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:44:58,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:58,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:44:58,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 667 proven. 31 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2025-03-08 05:44:58,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 122 proven. 276 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2025-03-08 05:44:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188839051] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:59,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:59,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2025-03-08 05:44:59,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300552961] [2025-03-08 05:44:59,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:59,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:44:59,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:59,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:44:59,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:44:59,549 INFO L87 Difference]: Start difference. First operand 124 states and 195 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2025-03-08 05:44:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:59,746 INFO L93 Difference]: Finished difference Result 239 states and 402 transitions. [2025-03-08 05:44:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:44:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) Word has length 215 [2025-03-08 05:44:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:59,748 INFO L225 Difference]: With dead ends: 239 [2025-03-08 05:44:59,748 INFO L226 Difference]: Without dead ends: 124 [2025-03-08 05:44:59,749 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 421 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:44:59,749 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:59,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 179 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-08 05:44:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2025-03-08 05:44:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 20 states have call successors, (20), 10 states have call predecessors, (20), 17 states have return successors, (66), 27 states have call predecessors, (66), 20 states have call successors, (66) [2025-03-08 05:44:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 175 transitions. [2025-03-08 05:44:59,760 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 175 transitions. Word has length 215 [2025-03-08 05:44:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:59,760 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 175 transitions. [2025-03-08 05:44:59,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2025-03-08 05:44:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 175 transitions. [2025-03-08 05:44:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-08 05:44:59,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:59,762 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:59,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:44:59,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 05:44:59,965 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:59,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash 775813117, now seen corresponding path program 6 times [2025-03-08 05:44:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349348443] [2025-03-08 05:44:59,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:59,973 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 146 statements into 7 equivalence classes. [2025-03-08 05:44:59,982 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 99 of 146 statements. [2025-03-08 05:44:59,983 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 05:44:59,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 163 proven. 15 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2025-03-08 05:45:00,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:00,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349348443] [2025-03-08 05:45:00,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349348443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:00,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720673336] [2025-03-08 05:45:00,086 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:00,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:00,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:00,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:45:00,148 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 146 statements into 7 equivalence classes. [2025-03-08 05:45:00,167 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 99 of 146 statements. [2025-03-08 05:45:00,167 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-08 05:45:00,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:00,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:45:00,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 191 proven. 21 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-08 05:45:00,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 191 proven. 21 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-08 05:45:00,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720673336] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:00,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:00,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2025-03-08 05:45:00,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201844417] [2025-03-08 05:45:00,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:00,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:45:00,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:00,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:45:00,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:45:00,647 INFO L87 Difference]: Start difference. First operand 115 states and 175 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) [2025-03-08 05:45:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:00,825 INFO L93 Difference]: Finished difference Result 230 states and 387 transitions. [2025-03-08 05:45:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:45:00,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) Word has length 146 [2025-03-08 05:45:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:00,827 INFO L225 Difference]: With dead ends: 230 [2025-03-08 05:45:00,827 INFO L226 Difference]: Without dead ends: 121 [2025-03-08 05:45:00,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 280 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:45:00,828 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:00,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 168 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-03-08 05:45:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2025-03-08 05:45:00,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 78 states have internal predecessors, (93), 20 states have call successors, (20), 13 states have call predecessors, (20), 16 states have return successors, (60), 26 states have call predecessors, (60), 20 states have call successors, (60) [2025-03-08 05:45:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 173 transitions. [2025-03-08 05:45:00,838 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 173 transitions. Word has length 146 [2025-03-08 05:45:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:00,838 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 173 transitions. [2025-03-08 05:45:00,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 9 states have call successors, (16) [2025-03-08 05:45:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 173 transitions. [2025-03-08 05:45:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2025-03-08 05:45:00,840 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:00,840 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:00,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:45:01,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 05:45:01,041 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:01,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1090100507, now seen corresponding path program 7 times [2025-03-08 05:45:01,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:01,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327055020] [2025-03-08 05:45:01,041 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:01,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 215 statements into 1 equivalence classes. [2025-03-08 05:45:01,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 215 of 215 statements. [2025-03-08 05:45:01,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:01,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 216 proven. 87 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2025-03-08 05:45:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327055020] [2025-03-08 05:45:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327055020] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728474383] [2025-03-08 05:45:01,225 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:01,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:01,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:01,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:45:01,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 215 statements into 1 equivalence classes. [2025-03-08 05:45:01,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 215 of 215 statements. [2025-03-08 05:45:01,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:01,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:01,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:01,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 275 proven. 129 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2025-03-08 05:45:01,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 275 proven. 143 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2025-03-08 05:45:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728474383] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:02,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:02,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 21 [2025-03-08 05:45:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254277477] [2025-03-08 05:45:02,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:02,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:45:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:02,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:45:02,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:02,272 INFO L87 Difference]: Start difference. First operand 118 states and 173 transitions. Second operand has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 14 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) [2025-03-08 05:45:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:02,417 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2025-03-08 05:45:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:45:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 14 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) Word has length 215 [2025-03-08 05:45:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:02,420 INFO L225 Difference]: With dead ends: 128 [2025-03-08 05:45:02,420 INFO L226 Difference]: Without dead ends: 124 [2025-03-08 05:45:02,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 415 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:45:02,421 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:02,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 292 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-08 05:45:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2025-03-08 05:45:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 78 states have internal predecessors, (93), 20 states have call successors, (20), 13 states have call predecessors, (20), 16 states have return successors, (60), 26 states have call predecessors, (60), 20 states have call successors, (60) [2025-03-08 05:45:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 173 transitions. [2025-03-08 05:45:02,430 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 173 transitions. Word has length 215 [2025-03-08 05:45:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:02,430 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 173 transitions. [2025-03-08 05:45:02,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 14 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) [2025-03-08 05:45:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 173 transitions. [2025-03-08 05:45:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2025-03-08 05:45:02,431 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:02,431 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:02,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:02,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 05:45:02,632 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:02,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash 300597469, now seen corresponding path program 8 times [2025-03-08 05:45:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048656422] [2025-03-08 05:45:02,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:02,637 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 174 statements into 2 equivalence classes. [2025-03-08 05:45:02,645 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 174 of 174 statements. [2025-03-08 05:45:02,645 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:02,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2025-03-08 05:45:03,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:03,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048656422] [2025-03-08 05:45:03,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048656422] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:03,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130008569] [2025-03-08 05:45:03,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:03,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:03,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:03,508 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:03,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:45:03,576 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 174 statements into 2 equivalence classes. [2025-03-08 05:45:03,606 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 174 of 174 statements. [2025-03-08 05:45:03,607 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:03,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:03,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 103 conjuncts are in the unsatisfiable core [2025-03-08 05:45:03,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2025-03-08 05:45:03,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2025-03-08 05:45:04,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130008569] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:04,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:04,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2025-03-08 05:45:04,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182856883] [2025-03-08 05:45:04,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:04,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 05:45:04,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:04,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 05:45:04,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:45:04,429 INFO L87 Difference]: Start difference. First operand 118 states and 173 transitions. Second operand has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2025-03-08 05:45:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:04,727 INFO L93 Difference]: Finished difference Result 173 states and 274 transitions. [2025-03-08 05:45:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-08 05:45:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 174 [2025-03-08 05:45:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:04,729 INFO L225 Difference]: With dead ends: 173 [2025-03-08 05:45:04,729 INFO L226 Difference]: Without dead ends: 169 [2025-03-08 05:45:04,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:45:04,730 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:04,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1650 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:45:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-08 05:45:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2025-03-08 05:45:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 90 states have internal predecessors, (105), 24 states have call successors, (24), 13 states have call predecessors, (24), 20 states have return successors, (86), 34 states have call predecessors, (86), 24 states have call successors, (86) [2025-03-08 05:45:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 215 transitions. [2025-03-08 05:45:04,740 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 215 transitions. Word has length 174 [2025-03-08 05:45:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:04,741 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 215 transitions. [2025-03-08 05:45:04,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 19 states have internal predecessors, (47), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2025-03-08 05:45:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 215 transitions. [2025-03-08 05:45:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2025-03-08 05:45:04,742 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:04,742 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:04,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:04,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:04,943 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:04,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1605557340, now seen corresponding path program 9 times [2025-03-08 05:45:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787619104] [2025-03-08 05:45:04,944 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:04,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 161 statements into 11 equivalence classes. [2025-03-08 05:45:04,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 65 of 161 statements. [2025-03-08 05:45:04,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:45:04,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 157 proven. 23 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2025-03-08 05:45:04,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787619104] [2025-03-08 05:45:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787619104] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467439385] [2025-03-08 05:45:04,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:05,000 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:05,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:45:05,069 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 161 statements into 11 equivalence classes. [2025-03-08 05:45:05,084 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 65 of 161 statements. [2025-03-08 05:45:05,084 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:45:05,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:05,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:45:05,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 319 proven. 4 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2025-03-08 05:45:05,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 157 proven. 23 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2025-03-08 05:45:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467439385] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:05,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:05,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-08 05:45:05,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448953128] [2025-03-08 05:45:05,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:05,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:45:05,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:05,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:45:05,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:45:05,414 INFO L87 Difference]: Start difference. First operand 138 states and 215 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-03-08 05:45:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:05,497 INFO L93 Difference]: Finished difference Result 256 states and 422 transitions. [2025-03-08 05:45:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:45:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2025-03-08 05:45:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:05,499 INFO L225 Difference]: With dead ends: 256 [2025-03-08 05:45:05,499 INFO L226 Difference]: Without dead ends: 127 [2025-03-08 05:45:05,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 315 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:45:05,500 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:05,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-08 05:45:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2025-03-08 05:45:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 82 states have (on average 1.146341463414634) internal successors, (94), 79 states have internal predecessors, (94), 21 states have call successors, (21), 13 states have call predecessors, (21), 16 states have return successors, (58), 27 states have call predecessors, (58), 21 states have call successors, (58) [2025-03-08 05:45:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2025-03-08 05:45:05,509 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 161 [2025-03-08 05:45:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:05,509 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2025-03-08 05:45:05,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 3 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-03-08 05:45:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2025-03-08 05:45:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2025-03-08 05:45:05,510 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:05,510 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:05,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 05:45:05,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 05:45:05,711 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:05,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:05,712 INFO L85 PathProgramCache]: Analyzing trace with hash 518345072, now seen corresponding path program 10 times [2025-03-08 05:45:05,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:05,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557117735] [2025-03-08 05:45:05,713 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:05,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:05,719 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 160 statements into 2 equivalence classes. [2025-03-08 05:45:05,724 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 136 of 160 statements. [2025-03-08 05:45:05,724 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:05,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 84 proven. 113 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-03-08 05:45:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557117735] [2025-03-08 05:45:05,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557117735] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51636460] [2025-03-08 05:45:05,797 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:05,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:05,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:05,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:45:05,872 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 160 statements into 2 equivalence classes. [2025-03-08 05:45:05,897 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 136 of 160 statements. [2025-03-08 05:45:05,897 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:05,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:05,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:45:05,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 84 proven. 113 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-03-08 05:45:05,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 84 proven. 118 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2025-03-08 05:45:06,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51636460] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:06,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:06,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2025-03-08 05:45:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128723067] [2025-03-08 05:45:06,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:06,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:45:06,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:06,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:45:06,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:45:06,379 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2025-03-08 05:45:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:06,471 INFO L93 Difference]: Finished difference Result 140 states and 216 transitions. [2025-03-08 05:45:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:45:06,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) Word has length 160 [2025-03-08 05:45:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:06,473 INFO L225 Difference]: With dead ends: 140 [2025-03-08 05:45:06,473 INFO L226 Difference]: Without dead ends: 136 [2025-03-08 05:45:06,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 313 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:45:06,474 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:06,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 125 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-08 05:45:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2025-03-08 05:45:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 75 states have internal predecessors, (90), 19 states have call successors, (19), 13 states have call predecessors, (19), 15 states have return successors, (52), 24 states have call predecessors, (52), 19 states have call successors, (52) [2025-03-08 05:45:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2025-03-08 05:45:06,482 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 160 [2025-03-08 05:45:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:06,482 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2025-03-08 05:45:06,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 7 states have call predecessors, (15), 9 states have call successors, (15) [2025-03-08 05:45:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2025-03-08 05:45:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2025-03-08 05:45:06,483 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:06,484 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:06,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:06,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 05:45:06,688 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:06,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash 310058335, now seen corresponding path program 11 times [2025-03-08 05:45:06,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:06,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055584839] [2025-03-08 05:45:06,689 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:06,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:06,694 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 201 statements into 13 equivalence classes. [2025-03-08 05:45:06,700 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 88 of 201 statements. [2025-03-08 05:45:06,700 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 05:45:06,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 143 proven. 255 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2025-03-08 05:45:06,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:06,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055584839] [2025-03-08 05:45:06,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055584839] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:06,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867396600] [2025-03-08 05:45:06,780 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:06,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:06,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:06,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:45:06,856 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 201 statements into 13 equivalence classes. [2025-03-08 05:45:06,872 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 88 of 201 statements. [2025-03-08 05:45:06,872 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-08 05:45:06,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:06,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:45:06,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 638 proven. 46 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2025-03-08 05:45:06,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 143 proven. 256 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2025-03-08 05:45:07,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867396600] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:07,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:07,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 17 [2025-03-08 05:45:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656217603] [2025-03-08 05:45:07,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:07,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:07,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:07,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:07,518 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-08 05:45:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:07,654 INFO L93 Difference]: Finished difference Result 216 states and 321 transitions. [2025-03-08 05:45:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:45:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 201 [2025-03-08 05:45:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:07,656 INFO L225 Difference]: With dead ends: 216 [2025-03-08 05:45:07,656 INFO L226 Difference]: Without dead ends: 113 [2025-03-08 05:45:07,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 392 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:07,657 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:07,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 172 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-08 05:45:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2025-03-08 05:45:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.131578947368421) internal successors, (86), 74 states have internal predecessors, (86), 19 states have call successors, (19), 12 states have call predecessors, (19), 15 states have return successors, (42), 24 states have call predecessors, (42), 19 states have call successors, (42) [2025-03-08 05:45:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2025-03-08 05:45:07,664 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 201 [2025-03-08 05:45:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:07,664 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2025-03-08 05:45:07,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 10 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-08 05:45:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2025-03-08 05:45:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2025-03-08 05:45:07,666 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:07,666 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 15, 15, 14, 12, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:07,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 05:45:07,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:07,867 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:07,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -636599611, now seen corresponding path program 12 times [2025-03-08 05:45:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:07,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498974485] [2025-03-08 05:45:07,867 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:07,873 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 228 statements into 13 equivalence classes. [2025-03-08 05:45:07,882 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 118 of 228 statements. [2025-03-08 05:45:07,882 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-08 05:45:07,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 138 proven. 290 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2025-03-08 05:45:07,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498974485] [2025-03-08 05:45:07,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498974485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:07,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049351613] [2025-03-08 05:45:07,971 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:07,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:07,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:07,973 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:07,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:45:08,051 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 228 statements into 13 equivalence classes. [2025-03-08 05:45:08,076 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 118 of 228 statements. [2025-03-08 05:45:08,076 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-08 05:45:08,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:08,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:45:08,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 601 proven. 18 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2025-03-08 05:45:08,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 138 proven. 342 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2025-03-08 05:45:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049351613] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:08,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-03-08 05:45:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590414059] [2025-03-08 05:45:08,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:08,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:08,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:08,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:08,775 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-03-08 05:45:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:08,885 INFO L93 Difference]: Finished difference Result 212 states and 293 transitions. [2025-03-08 05:45:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:45:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 228 [2025-03-08 05:45:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:08,888 INFO L225 Difference]: With dead ends: 212 [2025-03-08 05:45:08,888 INFO L226 Difference]: Without dead ends: 111 [2025-03-08 05:45:08,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 445 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:08,889 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:08,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 192 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-08 05:45:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2025-03-08 05:45:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.118421052631579) internal successors, (85), 74 states have internal predecessors, (85), 19 states have call successors, (19), 12 states have call predecessors, (19), 15 states have return successors, (41), 24 states have call predecessors, (41), 19 states have call successors, (41) [2025-03-08 05:45:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2025-03-08 05:45:08,895 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 228 [2025-03-08 05:45:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:08,895 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2025-03-08 05:45:08,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-03-08 05:45:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2025-03-08 05:45:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2025-03-08 05:45:08,896 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:08,896 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:08,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:09,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:09,097 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:09,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:09,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1950965354, now seen corresponding path program 13 times [2025-03-08 05:45:09,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:09,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515733320] [2025-03-08 05:45:09,097 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:09,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:09,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 215 statements into 1 equivalence classes. [2025-03-08 05:45:09,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 215 of 215 statements. [2025-03-08 05:45:09,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:09,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 116 proven. 251 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2025-03-08 05:45:09,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515733320] [2025-03-08 05:45:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515733320] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798336898] [2025-03-08 05:45:09,241 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:09,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:09,243 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:09,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:45:09,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 215 statements into 1 equivalence classes. [2025-03-08 05:45:09,362 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 215 of 215 statements. [2025-03-08 05:45:09,362 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:09,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:09,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:09,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 109 proven. 349 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2025-03-08 05:45:09,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 109 proven. 370 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2025-03-08 05:45:10,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798336898] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:10,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:10,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 23 [2025-03-08 05:45:10,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451106867] [2025-03-08 05:45:10,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:10,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:45:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:10,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:45:10,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:10,566 INFO L87 Difference]: Start difference. First operand 111 states and 145 transitions. Second operand has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-08 05:45:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:10,730 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2025-03-08 05:45:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:45:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) Word has length 215 [2025-03-08 05:45:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:10,730 INFO L225 Difference]: With dead ends: 119 [2025-03-08 05:45:10,731 INFO L226 Difference]: Without dead ends: 0 [2025-03-08 05:45:10,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 414 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:45:10,731 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:10,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 374 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-08 05:45:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-08 05:45:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:45:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-08 05:45:10,732 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 215 [2025-03-08 05:45:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:10,732 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-08 05:45:10,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-08 05:45:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-08 05:45:10,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-08 05:45:10,734 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-08 05:45:10,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 05:45:10,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:10,937 INFO L422 BasicCegarLoop]: Path program histogram: [13, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:10,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-08 05:45:16,845 WARN L286 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 116 DAG size of output: 58 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:45:27,851 WARN L286 SmtUtils]: Spent 11.01s on a formula simplification. DAG size of input: 135 DAG size of output: 83 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:45:36,371 WARN L286 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 116 DAG size of output: 58 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:45:47,481 WARN L286 SmtUtils]: Spent 10.99s on a formula simplification. DAG size of input: 135 DAG size of output: 83 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:45:54,903 WARN L286 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 122 DAG size of output: 67 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:46:02,046 WARN L286 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 122 DAG size of output: 67 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:46:12,504 WARN L286 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 111 DAG size of output: 99 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2025-03-08 05:46:15,798 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 05:46:15,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 05:46:15 BoogieIcfgContainer [2025-03-08 05:46:15,802 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 05:46:15,802 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 05:46:15,802 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 05:46:15,802 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 05:46:15,803 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:47" (3/4) ... [2025-03-08 05:46:15,804 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-08 05:46:15,808 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo2 [2025-03-08 05:46:15,808 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo1 [2025-03-08 05:46:15,810 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-03-08 05:46:15,810 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-08 05:46:15,810 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-08 05:46:15,810 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-08 05:46:15,855 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 05:46:15,855 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 05:46:15,855 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 05:46:15,856 INFO L158 Benchmark]: Toolchain (without parser) took 88523.33ms. Allocated memory was 142.6MB in the beginning and 830.5MB in the end (delta: 687.9MB). Free memory was 107.6MB in the beginning and 570.8MB in the end (delta: -463.2MB). Peak memory consumption was 223.6MB. Max. memory is 16.1GB. [2025-03-08 05:46:15,856 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 116.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:15,856 INFO L158 Benchmark]: CACSL2BoogieTranslator took 130.67ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 96.8MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 05:46:15,856 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.52ms. Allocated memory is still 142.6MB. Free memory was 96.8MB in the beginning and 95.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:15,856 INFO L158 Benchmark]: Boogie Preprocessor took 21.30ms. Allocated memory is still 142.6MB. Free memory was 95.4MB in the beginning and 94.6MB in the end (delta: 722.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:15,857 INFO L158 Benchmark]: IcfgBuilder took 187.46ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 83.7MB in the end (delta: 10.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 05:46:15,857 INFO L158 Benchmark]: TraceAbstraction took 88106.33ms. Allocated memory was 142.6MB in the beginning and 830.5MB in the end (delta: 687.9MB). Free memory was 83.0MB in the beginning and 575.1MB in the end (delta: -492.1MB). Peak memory consumption was 474.7MB. Max. memory is 16.1GB. [2025-03-08 05:46:15,857 INFO L158 Benchmark]: Witness Printer took 52.95ms. Allocated memory is still 830.5MB. Free memory was 575.1MB in the beginning and 570.8MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:15,858 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 116.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 130.67ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 96.8MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.52ms. Allocated memory is still 142.6MB. Free memory was 96.8MB in the beginning and 95.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.30ms. Allocated memory is still 142.6MB. Free memory was 95.4MB in the beginning and 94.6MB in the end (delta: 722.6kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 187.46ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 83.7MB in the end (delta: 10.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 88106.33ms. Allocated memory was 142.6MB in the beginning and 830.5MB in the end (delta: 687.9MB). Free memory was 83.0MB in the beginning and 575.1MB in the end (delta: -492.1MB). Peak memory consumption was 474.7MB. Max. memory is 16.1GB. * Witness Printer took 52.95ms. Allocated memory is still 830.5MB. Free memory was 575.1MB in the beginning and 570.8MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 41 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.2s, OverallIterations: 21, TraceHistogramMax: 18, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 618 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 525 mSDsluCounter, 5378 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4774 mSDsCounter, 468 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4682 IncrementalHoareTripleChecker+Invalid, 5150 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 468 mSolverCounterUnsat, 604 mSDtfsCounter, 4682 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5626 GetRequests, 5141 SyntacticMatches, 86 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=16, InterpolantAutomatonStates: 268, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 204 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 5317 NumberOfCodeBlocks, 4045 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 7906 ConstructedInterpolants, 0 QuantifiedInterpolants, 12474 SizeOfPredicates, 58 NumberOfNonLiveVariables, 4715 ConjunctsInSsa, 285 ConjunctsInUnsatCore, 59 InterpolantComputations, 2 PerfectInterpolantSequences, 30042/36432 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-08 05:46:15,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE