./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci03.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/Fibonacci03.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 be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:42:20,915 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:42:20,962 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:42:20,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:42:20,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:42:20,993 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:42:20,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:42:20,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:42:20,993 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:42:20,993 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:42:20,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:42:20,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:42:20,994 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:42:20,994 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:42:20,995 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:20,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:42:20,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:42:20,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:42:20,996 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:42:20,996 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 -> be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 [2025-03-08 05:42:21,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:42:21,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:42:21,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:42:21,222 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:42:21,222 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:42:21,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci03.c [2025-03-08 05:42:22,381 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e5f22d3/fac36c2ca69a48fbbfaab6a92f8a259a/FLAGaaa2f21a7 [2025-03-08 05:42:22,617 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:42:22,618 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c [2025-03-08 05:42:22,624 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e5f22d3/fac36c2ca69a48fbbfaab6a92f8a259a/FLAGaaa2f21a7 [2025-03-08 05:42:22,961 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e5f22d3/fac36c2ca69a48fbbfaab6a92f8a259a [2025-03-08 05:42:22,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:42:22,965 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:42:22,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:22,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:42:22,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:42:22,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:22" (1/1) ... [2025-03-08 05:42:22,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65abf7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:22, skipping insertion in model container [2025-03-08 05:42:22,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:22" (1/1) ... [2025-03-08 05:42:22,983 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:42:23,081 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/Fibonacci03.c[788,801] [2025-03-08 05:42:23,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:23,093 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:42:23,104 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/Fibonacci03.c[788,801] [2025-03-08 05:42:23,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:23,115 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:42:23,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23 WrapperNode [2025-03-08 05:42:23,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:23,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:23,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:42:23,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:42:23,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,127 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,139 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2025-03-08 05:42:23,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:23,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:42:23,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:42:23,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:42:23,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,148 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,158 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 05:42:23,159 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,160 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,161 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:42:23,166 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:42:23,166 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:42:23,166 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:42:23,167 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (1/1) ... [2025-03-08 05:42:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:23,195 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 05:42:23,197 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 05:42:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-03-08 05:42:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-03-08 05:42:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:42:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:42:23,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:42:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:42:23,259 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:42:23,261 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:42:23,305 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:42:23,335 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-08 05:42:23,335 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:42:23,342 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:42:23,342 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:42:23,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:23 BoogieIcfgContainer [2025-03-08 05:42:23,344 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:42:23,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:42:23,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:42:23,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:42:23,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:42:22" (1/3) ... [2025-03-08 05:42:23,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f8f90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:23, skipping insertion in model container [2025-03-08 05:42:23,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:23" (2/3) ... [2025-03-08 05:42:23,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f8f90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:23, skipping insertion in model container [2025-03-08 05:42:23,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:23" (3/3) ... [2025-03-08 05:42:23,352 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2025-03-08 05:42:23,363 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:42:23,365 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci03.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:42:23,407 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:42:23,415 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;@7f5690d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:42:23,416 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:42:23,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 05:42:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:42:23,424 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:23,425 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:23,425 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:23,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 828343037, now seen corresponding path program 1 times [2025-03-08 05:42:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925887017] [2025-03-08 05:42:23,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:23,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:23,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:42:23,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:42:23,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:23,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,618 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 05:42:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925887017] [2025-03-08 05:42:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925887017] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:23,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:23,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113481600] [2025-03-08 05:42:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:23,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:23,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:23,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:23,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:23,640 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.8) 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 05:42:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:23,720 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2025-03-08 05:42:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 05:42:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:23,726 INFO L225 Difference]: With dead ends: 31 [2025-03-08 05:42:23,726 INFO L226 Difference]: Without dead ends: 21 [2025-03-08 05:42:23,728 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 05:42:23,731 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:23,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-08 05:42:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-03-08 05:42:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 05:42:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-03-08 05:42:23,754 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2025-03-08 05:42:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:23,755 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-03-08 05:42:23,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 05:42:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-03-08 05:42:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 05:42:23,756 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:23,756 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:23,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:42:23,757 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:23,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1856819262, now seen corresponding path program 1 times [2025-03-08 05:42:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:23,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996130390] [2025-03-08 05:42:23,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:23,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:23,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 05:42:23,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 05:42:23,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:23,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,823 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 05:42:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996130390] [2025-03-08 05:42:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996130390] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115649628] [2025-03-08 05:42:23,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:23,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:23,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:23,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:23,826 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 05:42:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:23,870 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2025-03-08 05:42:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2025-03-08 05:42:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:23,871 INFO L225 Difference]: With dead ends: 25 [2025-03-08 05:42:23,871 INFO L226 Difference]: Without dead ends: 21 [2025-03-08 05:42:23,871 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 05:42:23,872 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:23,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-08 05:42:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-03-08 05:42:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 05:42:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-03-08 05:42:23,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2025-03-08 05:42:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:23,876 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-03-08 05:42:23,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 05:42:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-03-08 05:42:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:42:23,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:23,876 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:23,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:42:23,876 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:23,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash 87542200, now seen corresponding path program 1 times [2025-03-08 05:42:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683589249] [2025-03-08 05:42:23,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:23,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:42:23,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:42:23,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:23,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:42:23,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683589249] [2025-03-08 05:42:23,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683589249] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530087839] [2025-03-08 05:42:23,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:23,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:23,978 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 05:42:23,980 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 05:42:24,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:42:24,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:42:24,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:24,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:24,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:42:24,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:42:24,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:42:24,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530087839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:24,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:24,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2025-03-08 05:42:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895352134] [2025-03-08 05:42:24,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:24,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:42:24,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:24,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:42:24,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:42:24,280 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-08 05:42:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:24,387 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2025-03-08 05:42:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 24 [2025-03-08 05:42:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:24,388 INFO L225 Difference]: With dead ends: 43 [2025-03-08 05:42:24,388 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 05:42:24,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:42:24,389 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:24,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 05:42:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-08 05:42:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-08 05:42:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2025-03-08 05:42:24,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 24 [2025-03-08 05:42:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:24,395 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2025-03-08 05:42:24,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2025-03-08 05:42:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2025-03-08 05:42:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 05:42:24,397 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:24,397 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:24,408 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 05:42:24,604 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 05:42:24,604 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:24,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957336, now seen corresponding path program 1 times [2025-03-08 05:42:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880243394] [2025-03-08 05:42:24,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:24,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 05:42:24,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 05:42:24,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:24,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-08 05:42:24,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:24,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880243394] [2025-03-08 05:42:24,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880243394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731688104] [2025-03-08 05:42:24,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:24,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:24,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:24,718 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 05:42:24,719 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 05:42:24,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 05:42:24,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 05:42:24,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:24,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:24,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:42:24,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-03-08 05:42:24,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-08 05:42:25,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731688104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:25,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:25,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2025-03-08 05:42:25,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003584323] [2025-03-08 05:42:25,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:25,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:42:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:25,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:42:25,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:42:25,118 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-08 05:42:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:25,228 INFO L93 Difference]: Finished difference Result 45 states and 75 transitions. [2025-03-08 05:42:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2025-03-08 05:42:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:25,229 INFO L225 Difference]: With dead ends: 45 [2025-03-08 05:42:25,229 INFO L226 Difference]: Without dead ends: 39 [2025-03-08 05:42:25,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:42:25,230 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:25,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2025-03-08 05:42:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2025-03-08 05:42:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 25 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (30), 9 states have call predecessors, (30), 6 states have call successors, (30) [2025-03-08 05:42:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 61 transitions. [2025-03-08 05:42:25,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 61 transitions. Word has length 52 [2025-03-08 05:42:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:25,240 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 61 transitions. [2025-03-08 05:42:25,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2025-03-08 05:42:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 61 transitions. [2025-03-08 05:42:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-03-08 05:42:25,244 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:25,244 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 15, 11, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:25,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:42:25,444 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 05:42:25,444 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:25,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:25,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1769127806, now seen corresponding path program 2 times [2025-03-08 05:42:25,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:25,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527071638] [2025-03-08 05:42:25,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:25,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:25,456 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-08 05:42:25,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-08 05:42:25,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:25,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2025-03-08 05:42:25,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527071638] [2025-03-08 05:42:25,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527071638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076625580] [2025-03-08 05:42:25,744 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:25,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:25,746 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 05:42:25,748 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 05:42:25,789 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-08 05:42:25,822 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-08 05:42:25,822 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:25,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:25,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:42:25,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2025-03-08 05:42:25,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 427 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2025-03-08 05:42:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076625580] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:26,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:26,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2025-03-08 05:42:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676396037] [2025-03-08 05:42:26,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:26,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 05:42:26,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:26,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 05:42:26,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:42:26,714 INFO L87 Difference]: Start difference. First operand 36 states and 61 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-08 05:42:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:26,844 INFO L93 Difference]: Finished difference Result 55 states and 111 transitions. [2025-03-08 05:42:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:42:26,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) Word has length 158 [2025-03-08 05:42:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:26,847 INFO L225 Difference]: With dead ends: 55 [2025-03-08 05:42:26,848 INFO L226 Difference]: Without dead ends: 49 [2025-03-08 05:42:26,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 309 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:42:26,849 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:26,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 85 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-08 05:42:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2025-03-08 05:42:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (56), 13 states have call predecessors, (56), 8 states have call successors, (56) [2025-03-08 05:42:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2025-03-08 05:42:26,864 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 158 [2025-03-08 05:42:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:26,865 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2025-03-08 05:42:26,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-08 05:42:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2025-03-08 05:42:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2025-03-08 05:42:26,884 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:26,884 INFO L218 NwaCegarLoop]: trace histogram [71, 71, 49, 35, 35, 35, 35, 35, 35, 35, 22, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:26,891 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 05:42:27,084 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 05:42:27,085 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:27,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash 212508284, now seen corresponding path program 3 times [2025-03-08 05:42:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429985993] [2025-03-08 05:42:27,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:27,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 480 statements into 60 equivalence classes. [2025-03-08 05:42:27,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 98 of 480 statements. [2025-03-08 05:42:27,119 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:42:27,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13496 backedges. 1700 proven. 117 refuted. 0 times theorem prover too weak. 11679 trivial. 0 not checked. [2025-03-08 05:42:27,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:27,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429985993] [2025-03-08 05:42:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429985993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:27,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392429004] [2025-03-08 05:42:27,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:27,235 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 05:42:27,236 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 05:42:27,291 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 480 statements into 60 equivalence classes. [2025-03-08 05:42:27,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 98 of 480 statements. [2025-03-08 05:42:27,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:42:27,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:27,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:42:27,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13496 backedges. 3577 proven. 12 refuted. 0 times theorem prover too weak. 9907 trivial. 0 not checked. [2025-03-08 05:42:27,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13496 backedges. 1702 proven. 115 refuted. 0 times theorem prover too weak. 11679 trivial. 0 not checked. [2025-03-08 05:42:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392429004] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:28,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:28,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 13 [2025-03-08 05:42:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805329144] [2025-03-08 05:42:28,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:28,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:42:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:28,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:42:28,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:42:28,589 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:42:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:28,678 INFO L93 Difference]: Finished difference Result 93 states and 240 transitions. [2025-03-08 05:42:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:28,679 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 480 [2025-03-08 05:42:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:28,680 INFO L225 Difference]: With dead ends: 93 [2025-03-08 05:42:28,680 INFO L226 Difference]: Without dead ends: 51 [2025-03-08 05:42:28,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 952 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:42:28,681 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:28,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-08 05:42:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2025-03-08 05:42:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 8 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (51), 13 states have call predecessors, (51), 8 states have call successors, (51) [2025-03-08 05:42:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 92 transitions. [2025-03-08 05:42:28,690 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 92 transitions. Word has length 480 [2025-03-08 05:42:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:28,690 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 92 transitions. [2025-03-08 05:42:28,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:42:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 92 transitions. [2025-03-08 05:42:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2025-03-08 05:42:28,694 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:28,694 INFO L218 NwaCegarLoop]: trace histogram [71, 71, 61, 35, 35, 35, 35, 35, 35, 35, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:28,700 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 05:42:28,895 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 05:42:28,895 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:28,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1663934924, now seen corresponding path program 4 times [2025-03-08 05:42:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854259278] [2025-03-08 05:42:28,896 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:28,909 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 492 statements into 2 equivalence classes. [2025-03-08 05:42:28,950 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 417 of 492 statements. [2025-03-08 05:42:28,950 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:28,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14150 backedges. 1256 proven. 2490 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2025-03-08 05:42:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854259278] [2025-03-08 05:42:29,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854259278] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182629877] [2025-03-08 05:42:29,542 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:29,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:29,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:29,547 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 05:42:29,548 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 05:42:29,612 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 492 statements into 2 equivalence classes. [2025-03-08 05:42:29,689 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 417 of 492 statements. [2025-03-08 05:42:29,689 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:29,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:29,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:42:29,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14150 backedges. 4694 proven. 170 refuted. 0 times theorem prover too weak. 9286 trivial. 0 not checked. [2025-03-08 05:42:29,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14150 backedges. 506 proven. 2500 refuted. 0 times theorem prover too weak. 11144 trivial. 0 not checked. [2025-03-08 05:42:31,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182629877] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:31,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:31,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 15] total 27 [2025-03-08 05:42:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929097988] [2025-03-08 05:42:31,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:31,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:42:31,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:31,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:42:31,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:42:31,385 INFO L87 Difference]: Start difference. First operand 48 states and 92 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 21 states have call successors, (28), 2 states have call predecessors, (28), 14 states have return successors, (39), 17 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-08 05:42:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:31,845 INFO L93 Difference]: Finished difference Result 140 states and 339 transitions. [2025-03-08 05:42:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 05:42:31,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 21 states have call successors, (28), 2 states have call predecessors, (28), 14 states have return successors, (39), 17 states have call predecessors, (39), 21 states have call successors, (39) Word has length 492 [2025-03-08 05:42:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:31,847 INFO L225 Difference]: With dead ends: 140 [2025-03-08 05:42:31,848 INFO L226 Difference]: Without dead ends: 96 [2025-03-08 05:42:31,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 975 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=2102, Unknown=0, NotChecked=0, Total=2756 [2025-03-08 05:42:31,851 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 218 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:31,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 201 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-08 05:42:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2025-03-08 05:42:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 66 states have internal predecessors, (73), 17 states have call successors, (17), 14 states have call predecessors, (17), 9 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2025-03-08 05:42:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 133 transitions. [2025-03-08 05:42:31,868 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 133 transitions. Word has length 492 [2025-03-08 05:42:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:31,868 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 133 transitions. [2025-03-08 05:42:31,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 21 states have call successors, (28), 2 states have call predecessors, (28), 14 states have return successors, (39), 17 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-08 05:42:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 133 transitions. [2025-03-08 05:42:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2025-03-08 05:42:31,877 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:31,877 INFO L218 NwaCegarLoop]: trace histogram [97, 97, 78, 48, 48, 48, 48, 48, 48, 48, 30, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:31,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:42:32,078 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 05:42:32,078 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:32,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:32,079 INFO L85 PathProgramCache]: Analyzing trace with hash -716322305, now seen corresponding path program 5 times [2025-03-08 05:42:32,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:32,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369354727] [2025-03-08 05:42:32,079 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:32,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:32,095 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 665 statements into 78 equivalence classes. [2025-03-08 05:42:32,195 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) and asserted 463 of 665 statements. [2025-03-08 05:42:32,196 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2025-03-08 05:42:32,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 3735 proven. 1741 refuted. 0 times theorem prover too weak. 20663 trivial. 0 not checked. [2025-03-08 05:42:32,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:32,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369354727] [2025-03-08 05:42:32,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369354727] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:32,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173328360] [2025-03-08 05:42:32,709 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:32,711 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 05:42:32,713 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 05:42:32,787 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 665 statements into 78 equivalence classes. [2025-03-08 05:42:32,914 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) and asserted 463 of 665 statements. [2025-03-08 05:42:32,914 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2025-03-08 05:42:32,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:32,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:42:32,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 11426 proven. 865 refuted. 0 times theorem prover too weak. 13848 trivial. 0 not checked. [2025-03-08 05:42:33,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 3888 proven. 1940 refuted. 0 times theorem prover too weak. 20311 trivial. 0 not checked. [2025-03-08 05:42:36,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173328360] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:36,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:36,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 23] total 28 [2025-03-08 05:42:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922939275] [2025-03-08 05:42:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:36,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 05:42:36,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:36,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 05:42:36,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:42:36,340 INFO L87 Difference]: Start difference. First operand 96 states and 133 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 21 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 14 states have call predecessors, (37), 21 states have call successors, (37) [2025-03-08 05:42:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:36,686 INFO L93 Difference]: Finished difference Result 201 states and 301 transitions. [2025-03-08 05:42:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:42:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 21 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 14 states have call predecessors, (37), 21 states have call successors, (37) Word has length 665 [2025-03-08 05:42:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:36,689 INFO L225 Difference]: With dead ends: 201 [2025-03-08 05:42:36,689 INFO L226 Difference]: Without dead ends: 111 [2025-03-08 05:42:36,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1368 GetRequests, 1314 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 05:42:36,692 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 58 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:36,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 233 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-08 05:42:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2025-03-08 05:42:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 66 states have internal predecessors, (72), 18 states have call successors, (18), 14 states have call predecessors, (18), 9 states have return successors, (43), 16 states have call predecessors, (43), 18 states have call successors, (43) [2025-03-08 05:42:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2025-03-08 05:42:36,701 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 665 [2025-03-08 05:42:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:36,701 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2025-03-08 05:42:36,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 21 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 14 states have call predecessors, (37), 21 states have call successors, (37) [2025-03-08 05:42:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2025-03-08 05:42:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2025-03-08 05:42:36,704 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:36,704 INFO L218 NwaCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:36,711 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 05:42:36,904 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 05:42:36,904 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:36,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1679448066, now seen corresponding path program 6 times [2025-03-08 05:42:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:36,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121036760] [2025-03-08 05:42:36,905 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:36,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:36,917 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 570 statements into 78 equivalence classes. [2025-03-08 05:42:36,938 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 148 of 570 statements. [2025-03-08 05:42:36,938 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-08 05:42:36,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 718 proven. 2242 refuted. 0 times theorem prover too weak. 16143 trivial. 0 not checked. [2025-03-08 05:42:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121036760] [2025-03-08 05:42:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121036760] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688502289] [2025-03-08 05:42:37,098 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:37,100 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 05:42:37,102 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 05:42:37,201 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 570 statements into 78 equivalence classes. [2025-03-08 05:42:37,236 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) and asserted 148 of 570 statements. [2025-03-08 05:42:37,236 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2025-03-08 05:42:37,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:37,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:42:37,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 709 proven. 2234 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2025-03-08 05:42:37,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 715 proven. 2285 refuted. 0 times theorem prover too weak. 16103 trivial. 0 not checked. [2025-03-08 05:42:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688502289] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:39,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:39,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 19 [2025-03-08 05:42:39,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056640750] [2025-03-08 05:42:39,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:39,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:42:39,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:39,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:42:39,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:42:39,168 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (23), 10 states have call predecessors, (23), 14 states have call successors, (23) [2025-03-08 05:42:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:39,345 INFO L93 Difference]: Finished difference Result 353 states and 510 transitions. [2025-03-08 05:42:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:42:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (23), 10 states have call predecessors, (23), 14 states have call successors, (23) Word has length 570 [2025-03-08 05:42:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:39,351 INFO L225 Difference]: With dead ends: 353 [2025-03-08 05:42:39,351 INFO L226 Difference]: Without dead ends: 349 [2025-03-08 05:42:39,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1130 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:42:39,352 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:39,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 114 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2025-03-08 05:42:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 300. [2025-03-08 05:42:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 205 states have (on average 1.024390243902439) internal successors, (210), 200 states have internal predecessors, (210), 66 states have call successors, (66), 38 states have call predecessors, (66), 28 states have return successors, (158), 61 states have call predecessors, (158), 66 states have call successors, (158) [2025-03-08 05:42:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 434 transitions. [2025-03-08 05:42:39,400 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 434 transitions. Word has length 570 [2025-03-08 05:42:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:39,401 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 434 transitions. [2025-03-08 05:42:39,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 14 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (23), 10 states have call predecessors, (23), 14 states have call successors, (23) [2025-03-08 05:42:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 434 transitions. [2025-03-08 05:42:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2025-03-08 05:42:39,405 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:39,405 INFO L218 NwaCegarLoop]: trace histogram [99, 99, 80, 49, 49, 49, 49, 49, 49, 49, 31, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:39,412 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 05:42:39,609 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 05:42:39,609 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:39,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1969194815, now seen corresponding path program 7 times [2025-03-08 05:42:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135816471] [2025-03-08 05:42:39,610 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:42:39,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:39,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 679 statements into 1 equivalence classes. [2025-03-08 05:42:39,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 679 of 679 statements. [2025-03-08 05:42:39,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:39,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 1376 proven. 1680 refuted. 0 times theorem prover too weak. 24212 trivial. 0 not checked. [2025-03-08 05:42:40,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135816471] [2025-03-08 05:42:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135816471] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595923649] [2025-03-08 05:42:40,085 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:42:40,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:40,087 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 05:42:40,088 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 05:42:40,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 679 statements into 1 equivalence classes. [2025-03-08 05:42:40,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 679 of 679 statements. [2025-03-08 05:42:40,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:40,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:40,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:42:40,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 1580 proven. 1982 refuted. 0 times theorem prover too weak. 23706 trivial. 0 not checked. [2025-03-08 05:42:40,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 1588 proven. 2031 refuted. 0 times theorem prover too weak. 23649 trivial. 0 not checked. [2025-03-08 05:42:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595923649] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:42,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 17] total 18 [2025-03-08 05:42:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940187651] [2025-03-08 05:42:42,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:42,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:42:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:42,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:42:42,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:42:42,423 INFO L87 Difference]: Start difference. First operand 300 states and 434 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:42:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:42,527 INFO L93 Difference]: Finished difference Result 355 states and 559 transitions. [2025-03-08 05:42:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:42:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) Word has length 679 [2025-03-08 05:42:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:42,532 INFO L225 Difference]: With dead ends: 355 [2025-03-08 05:42:42,532 INFO L226 Difference]: Without dead ends: 351 [2025-03-08 05:42:42,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1347 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:42:42,532 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:42,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 109 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2025-03-08 05:42:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 305. [2025-03-08 05:42:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 203 states have internal predecessors, (213), 67 states have call successors, (67), 38 states have call predecessors, (67), 29 states have return successors, (169), 63 states have call predecessors, (169), 67 states have call successors, (169) [2025-03-08 05:42:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 449 transitions. [2025-03-08 05:42:42,563 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 449 transitions. Word has length 679 [2025-03-08 05:42:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:42,563 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 449 transitions. [2025-03-08 05:42:42,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:42:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 449 transitions. [2025-03-08 05:42:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2025-03-08 05:42:42,569 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:42,569 INFO L218 NwaCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:42,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:42,769 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 05:42:42,769 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:42,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash 843604331, now seen corresponding path program 8 times [2025-03-08 05:42:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:42,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116744916] [2025-03-08 05:42:42,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:42,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 747 statements into 2 equivalence classes. [2025-03-08 05:42:42,865 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 747 of 747 statements. [2025-03-08 05:42:42,865 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:42,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 2756 proven. 10117 refuted. 0 times theorem prover too weak. 20223 trivial. 0 not checked. [2025-03-08 05:42:51,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116744916] [2025-03-08 05:42:51,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116744916] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:51,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557117735] [2025-03-08 05:42:51,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:51,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:51,878 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 05:42:51,880 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 05:42:52,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 747 statements into 2 equivalence classes. [2025-03-08 05:42:52,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 747 of 747 statements. [2025-03-08 05:42:52,150 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:52,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:52,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 220 conjuncts are in the unsatisfiable core [2025-03-08 05:42:52,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2025-03-08 05:42:52,798 INFO L312 TraceCheckSpWp]: Computing backward predicates...