./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-2.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 a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:42:51,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:42:52,034 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:42:52,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:42:52,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:42:52,061 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:42:52,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:42:52,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:42:52,063 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:42:52,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:42:52,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:42:52,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:42:52,063 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:42:52,064 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:52,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:42:52,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:42:52,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:42:52,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:42:52,065 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 -> a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a [2025-03-08 05:42:52,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:42:52,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:42:52,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:42:52,324 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:42:52,324 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:42:52,325 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2025-03-08 05:42:53,637 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3467d80/494836cacd4f4915852d68eb50d0d04d/FLAGb013452c0 [2025-03-08 05:42:53,868 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:42:53,875 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2025-03-08 05:42:53,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3467d80/494836cacd4f4915852d68eb50d0d04d/FLAGb013452c0 [2025-03-08 05:42:53,900 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3467d80/494836cacd4f4915852d68eb50d0d04d [2025-03-08 05:42:53,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:42:53,904 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:42:53,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:53,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:42:53,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:42:53,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:53" (1/1) ... [2025-03-08 05:42:53,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21491120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:53, skipping insertion in model container [2025-03-08 05:42:53,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:53" (1/1) ... [2025-03-08 05:42:53,922 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:42:54,037 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c[743,756] [2025-03-08 05:42:54,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:54,048 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:42:54,059 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c[743,756] [2025-03-08 05:42:54,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:54,071 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:42:54,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54 WrapperNode [2025-03-08 05:42:54,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:54,073 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:54,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:42:54,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:42:54,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,095 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-08 05:42:54,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:54,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:42:54,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:42:54,097 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:42:54,102 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,103 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,109 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 05:42:54,109 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,111 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,113 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:42:54,114 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:42:54,114 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:42:54,114 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:42:54,114 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (1/1) ... [2025-03-08 05:42:54,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:54,139 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 05:42:54,145 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 05:42:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:42:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:42:54,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:42:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:42:54,166 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-03-08 05:42:54,166 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-03-08 05:42:54,206 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:42:54,209 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:42:54,305 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:42:54,310 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-08 05:42:54,310 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:42:54,317 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:42:54,318 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:42:54,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:54 BoogieIcfgContainer [2025-03-08 05:42:54,319 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:42:54,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:42:54,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:42:54,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:42:54,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:42:53" (1/3) ... [2025-03-08 05:42:54,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b651b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:54, skipping insertion in model container [2025-03-08 05:42:54,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:54" (2/3) ... [2025-03-08 05:42:54,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b651b0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:54, skipping insertion in model container [2025-03-08 05:42:54,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:54" (3/3) ... [2025-03-08 05:42:54,328 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2025-03-08 05:42:54,340 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:42:54,342 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_10-2.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:42:54,378 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:42:54,388 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;@22867c41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:42:54,388 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:42:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 05:42:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:42:54,397 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:54,397 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:54,398 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:54,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-03-08 05:42:54,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890246738] [2025-03-08 05:42:54,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:54,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:42:54,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:42:54,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:54,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:54,612 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 05:42:54,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:54,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890246738] [2025-03-08 05:42:54,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890246738] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:54,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:54,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:54,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824558752] [2025-03-08 05:42:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:54,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:54,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:54,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:54,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:54,641 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:54,718 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-08 05:42:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-08 05:42:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:54,727 INFO L225 Difference]: With dead ends: 32 [2025-03-08 05:42:54,727 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 05:42:54,730 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 05:42:54,736 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:54,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 05:42:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-08 05:42:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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 05:42:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-08 05:42:54,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-03-08 05:42:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:54,769 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-08 05:42:54,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-08 05:42:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:42:54,770 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:54,771 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:54,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:42:54,771 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:54,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-03-08 05:42:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:54,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796094133] [2025-03-08 05:42:54,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:54,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:42:54,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:42:54,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:54,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:54,851 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 05:42:54,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796094133] [2025-03-08 05:42:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796094133] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:54,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:54,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463546776] [2025-03-08 05:42:54,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:54,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:54,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:54,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:54,853 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:54,901 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-03-08 05:42:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 05:42:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:54,902 INFO L225 Difference]: With dead ends: 24 [2025-03-08 05:42:54,902 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 05:42:54,903 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 05:42:54,903 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:54,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 05:42:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-08 05:42:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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 05:42:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-08 05:42:54,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-03-08 05:42:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:54,909 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-08 05:42:54,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-08 05:42:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:42:54,910 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:54,911 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:54,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:42:54,911 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:54,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-03-08 05:42:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099143921] [2025-03-08 05:42:54,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:54,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:42:54,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:42:54,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:54,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,015 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 05:42:55,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:55,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099143921] [2025-03-08 05:42:55,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099143921] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:55,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928416232] [2025-03-08 05:42:55,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:55,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:55,019 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 05:42:55,023 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 05:42:55,051 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:42:55,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:42:55,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:55,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:42:55,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:55,132 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 05:42:55,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:55,348 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 05:42:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928416232] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:55,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-03-08 05:42:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425564221] [2025-03-08 05:42:55,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:55,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:42:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:55,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:42:55,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:42:55,349 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:42:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:55,412 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-08 05:42:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:42:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-08 05:42:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:55,413 INFO L225 Difference]: With dead ends: 35 [2025-03-08 05:42:55,413 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 05:42:55,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:42:55,413 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:55,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 05:42:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-08 05:42:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:42:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-08 05:42:55,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-03-08 05:42:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:55,417 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-08 05:42:55,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:42:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-08 05:42:55,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:42:55,418 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:55,418 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 05:42:55,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:55,619 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 05:42:55,619 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:55,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-03-08 05:42:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:55,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10547276] [2025-03-08 05:42:55,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:55,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:42:55,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:42:55,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:55,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:42:55,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10547276] [2025-03-08 05:42:55,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10547276] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267787502] [2025-03-08 05:42:55,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:55,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:55,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:55,710 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 05:42:55,714 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 05:42:55,740 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:42:55,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:42:55,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:55,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:42:55,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:42:55,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:42:55,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267787502] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:55,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:55,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-08 05:42:55,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314309031] [2025-03-08 05:42:55,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:55,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:42:55,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:55,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:42:55,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:42:55,940 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:42:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:55,993 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-03-08 05:42:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:42:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-08 05:42:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:55,995 INFO L225 Difference]: With dead ends: 29 [2025-03-08 05:42:55,995 INFO L226 Difference]: Without dead ends: 25 [2025-03-08 05:42:55,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:42:55,997 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:55,997 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-08 05:42:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-08 05:42:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 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 05:42:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-03-08 05:42:56,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-03-08 05:42:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:56,004 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-03-08 05:42:56,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:42:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-03-08 05:42:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:42:56,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:56,005 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:56,010 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 05:42:56,209 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 05:42:56,209 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:56,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:56,210 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-03-08 05:42:56,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:56,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196189699] [2025-03-08 05:42:56,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:56,215 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 05:42:56,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:42:56,224 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:56,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 05:42:56,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:56,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196189699] [2025-03-08 05:42:56,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196189699] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:56,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572468742] [2025-03-08 05:42:56,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:56,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:56,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:56,362 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 05:42:56,364 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 05:42:56,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-08 05:42:56,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:42:56,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:56,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:56,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:42:56,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:42:56,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 05:42:56,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572468742] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:56,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:56,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-03-08 05:42:56,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026244357] [2025-03-08 05:42:56,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:56,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:42:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:56,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:42:56,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:42:56,787 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-08 05:42:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:56,978 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-03-08 05:42:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:42:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2025-03-08 05:42:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:56,980 INFO L225 Difference]: With dead ends: 60 [2025-03-08 05:42:56,980 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 05:42:56,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:42:56,983 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:56,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 05:42:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-08 05:42:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-08 05:42:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-03-08 05:42:56,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-03-08 05:42:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:56,992 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-03-08 05:42:56,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-08 05:42:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-03-08 05:42:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-08 05:42:56,994 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:56,994 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:56,999 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 05:42:57,195 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 05:42:57,196 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:57,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:57,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-03-08 05:42:57,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358843729] [2025-03-08 05:42:57,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:57,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:57,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-08 05:42:57,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-08 05:42:57,218 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:42:57,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-08 05:42:57,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:57,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358843729] [2025-03-08 05:42:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358843729] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008056586] [2025-03-08 05:42:57,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:57,335 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 05:42:57,336 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 05:42:57,366 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-08 05:42:57,384 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-08 05:42:57,384 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-08 05:42:57,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:57,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:42:57,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-08 05:42:57,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-08 05:42:57,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008056586] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:57,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:57,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-08 05:42:57,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651892273] [2025-03-08 05:42:57,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:57,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:42:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:57,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:42:57,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:42:57,807 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 05:42:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:57,917 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-03-08 05:42:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2025-03-08 05:42:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:57,919 INFO L225 Difference]: With dead ends: 72 [2025-03-08 05:42:57,919 INFO L226 Difference]: Without dead ends: 40 [2025-03-08 05:42:57,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:42:57,920 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:57,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-08 05:42:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-08 05:42:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-08 05:42:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-08 05:42:57,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-03-08 05:42:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:57,930 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-08 05:42:57,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-08 05:42:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-08 05:42:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-08 05:42:57,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:57,931 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:57,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 05:42:58,138 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 05:42:58,139 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:58,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 4 times [2025-03-08 05:42:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:58,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568467475] [2025-03-08 05:42:58,139 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:58,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:58,144 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-08 05:42:58,152 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 65 statements. [2025-03-08 05:42:58,152 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:58,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 05:42:58,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568467475] [2025-03-08 05:42:58,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568467475] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827611697] [2025-03-08 05:42:58,238 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:58,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:58,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:58,240 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 05:42:58,241 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 05:42:58,266 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-08 05:42:58,277 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 54 of 65 statements. [2025-03-08 05:42:58,277 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:58,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:58,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:42:58,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 05:42:58,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-08 05:42:58,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827611697] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:58,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:58,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2025-03-08 05:42:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271805291] [2025-03-08 05:42:58,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:58,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:42:58,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:58,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:42:58,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:42:58,773 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-08 05:42:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:58,855 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2025-03-08 05:42:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:42:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 65 [2025-03-08 05:42:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:58,856 INFO L225 Difference]: With dead ends: 49 [2025-03-08 05:42:58,857 INFO L226 Difference]: Without dead ends: 45 [2025-03-08 05:42:58,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:42:58,860 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:58,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-08 05:42:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2025-03-08 05:42:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (16), 9 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-08 05:42:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2025-03-08 05:42:58,867 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 65 [2025-03-08 05:42:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:58,868 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2025-03-08 05:42:58,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 13 states have internal predecessors, (40), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2025-03-08 05:42:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2025-03-08 05:42:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-08 05:42:58,869 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:58,869 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:58,876 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 05:42:59,075 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 05:42:59,075 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:59,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -240813463, now seen corresponding path program 5 times [2025-03-08 05:42:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329542377] [2025-03-08 05:42:59,076 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:59,085 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 133 statements into 13 equivalence classes. [2025-03-08 05:42:59,103 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 99 of 133 statements. [2025-03-08 05:42:59,105 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 05:42:59,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 203 proven. 317 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2025-03-08 05:42:59,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:59,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329542377] [2025-03-08 05:42:59,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329542377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:59,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391576518] [2025-03-08 05:42:59,304 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:59,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:59,307 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 05:42:59,308 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 05:42:59,343 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 133 statements into 13 equivalence classes. [2025-03-08 05:42:59,365 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 99 of 133 statements. [2025-03-08 05:42:59,365 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-08 05:42:59,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:59,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:42:59,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2025-03-08 05:42:59,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 189 proven. 354 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2025-03-08 05:43:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391576518] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:00,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:00,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 22 [2025-03-08 05:43:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272908490] [2025-03-08 05:43:00,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:00,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:43:00,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:00,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:43:00,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:43:00,342 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 13 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:43:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:00,588 INFO L93 Difference]: Finished difference Result 102 states and 151 transitions. [2025-03-08 05:43:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:43:00,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 13 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) Word has length 133 [2025-03-08 05:43:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:00,590 INFO L225 Difference]: With dead ends: 102 [2025-03-08 05:43:00,590 INFO L226 Difference]: Without dead ends: 63 [2025-03-08 05:43:00,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 254 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:43:00,591 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:00,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 120 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-08 05:43:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2025-03-08 05:43:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.146341463414634) internal successors, (47), 38 states have internal predecessors, (47), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-08 05:43:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2025-03-08 05:43:00,597 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 133 [2025-03-08 05:43:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:00,597 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2025-03-08 05:43:00,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 13 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:43:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2025-03-08 05:43:00,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-08 05:43:00,598 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:00,598 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:00,604 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 05:43:00,799 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 05:43:00,799 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:00,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1813016480, now seen corresponding path program 6 times [2025-03-08 05:43:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:00,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359612264] [2025-03-08 05:43:00,799 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:00,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-03-08 05:43:00,815 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-03-08 05:43:00,815 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 05:43:00,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 45 proven. 223 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-03-08 05:43:00,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359612264] [2025-03-08 05:43:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359612264] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990524447] [2025-03-08 05:43:00,930 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:00,932 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 05:43:00,933 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 05:43:00,969 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 106 statements into 13 equivalence classes. [2025-03-08 05:43:00,991 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 92 of 106 statements. [2025-03-08 05:43:00,991 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 05:43:00,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:00,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:43:00,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-03-08 05:43:01,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2025-03-08 05:43:01,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990524447] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:01,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:01,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2025-03-08 05:43:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145680515] [2025-03-08 05:43:01,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:01,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 05:43:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:01,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 05:43:01,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:43:01,655 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:43:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:01,729 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2025-03-08 05:43:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:43:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) Word has length 106 [2025-03-08 05:43:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:01,732 INFO L225 Difference]: With dead ends: 64 [2025-03-08 05:43:01,732 INFO L226 Difference]: Without dead ends: 60 [2025-03-08 05:43:01,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 204 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:43:01,735 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:01,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 72 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:43:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-08 05:43:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-03-08 05:43:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 40 states have internal predecessors, (49), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2025-03-08 05:43:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2025-03-08 05:43:01,740 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 106 [2025-03-08 05:43:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:01,740 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2025-03-08 05:43:01,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 16 states have internal predecessors, (49), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 7 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:43:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2025-03-08 05:43:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2025-03-08 05:43:01,742 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:01,742 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:01,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:01,942 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 05:43:01,942 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:01,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash 779620497, now seen corresponding path program 7 times [2025-03-08 05:43:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:01,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101738406] [2025-03-08 05:43:01,943 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:01,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:01,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 201 statements into 1 equivalence classes. [2025-03-08 05:43:01,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 201 of 201 statements. [2025-03-08 05:43:01,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:01,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2025-03-08 05:43:02,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:02,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101738406] [2025-03-08 05:43:02,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101738406] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:02,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583563971] [2025-03-08 05:43:02,142 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:02,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:02,144 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 05:43:02,145 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 05:43:02,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 201 statements into 1 equivalence classes. [2025-03-08 05:43:02,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 201 of 201 statements. [2025-03-08 05:43:02,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:02,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:02,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:43:02,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2025-03-08 05:43:02,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 693 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2025-03-08 05:43:03,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583563971] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:03,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:03,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-03-08 05:43:03,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079305879] [2025-03-08 05:43:03,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:03,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:43:03,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:03,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:43:03,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:43:03,164 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-08 05:43:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:03,271 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2025-03-08 05:43:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:43:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 201 [2025-03-08 05:43:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:03,272 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:43:03,272 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 05:43:03,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:43:03,273 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:03,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 79 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 05:43:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2025-03-08 05:43:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 43 states have internal predecessors, (52), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-08 05:43:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2025-03-08 05:43:03,279 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 201 [2025-03-08 05:43:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:03,279 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2025-03-08 05:43:03,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2025-03-08 05:43:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2025-03-08 05:43:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2025-03-08 05:43:03,282 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:03,282 INFO L218 NwaCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:03,288 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 05:43:03,483 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 05:43:03,483 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:03,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash -713979081, now seen corresponding path program 8 times [2025-03-08 05:43:03,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:03,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030824306] [2025-03-08 05:43:03,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:03,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:03,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-03-08 05:43:03,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-03-08 05:43:03,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:03,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 228 proven. 1477 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2025-03-08 05:43:03,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030824306] [2025-03-08 05:43:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030824306] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307431317] [2025-03-08 05:43:03,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:03,787 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 05:43:03,789 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 05:43:03,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 351 statements into 2 equivalence classes. [2025-03-08 05:43:03,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 351 of 351 statements. [2025-03-08 05:43:03,906 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:03,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:03,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:43:03,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 228 proven. 1477 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2025-03-08 05:43:03,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 228 proven. 1534 refuted. 0 times theorem prover too weak. 5358 trivial. 0 not checked. [2025-03-08 05:43:05,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307431317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:05,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:05,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-03-08 05:43:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843002366] [2025-03-08 05:43:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:05,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:43:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:05,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:43:05,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:43:05,666 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-08 05:43:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:05,777 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2025-03-08 05:43:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:43:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 351 [2025-03-08 05:43:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:05,781 INFO L225 Difference]: With dead ends: 74 [2025-03-08 05:43:05,781 INFO L226 Difference]: Without dead ends: 70 [2025-03-08 05:43:05,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 693 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:43:05,781 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:05,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 94 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-03-08 05:43:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2025-03-08 05:43:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 46 states have internal predecessors, (55), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (38), 15 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-08 05:43:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 104 transitions. [2025-03-08 05:43:05,791 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 104 transitions. Word has length 351 [2025-03-08 05:43:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:05,792 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 104 transitions. [2025-03-08 05:43:05,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2025-03-08 05:43:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 104 transitions. [2025-03-08 05:43:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2025-03-08 05:43:05,797 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:05,797 INFO L218 NwaCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:05,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:05,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:05,998 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:05,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:05,998 INFO L85 PathProgramCache]: Analyzing trace with hash 281639384, now seen corresponding path program 9 times [2025-03-08 05:43:05,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:05,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680698739] [2025-03-08 05:43:05,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:05,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:06,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 528 statements into 70 equivalence classes. [2025-03-08 05:43:06,034 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) and asserted 204 of 528 statements. [2025-03-08 05:43:06,034 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2025-03-08 05:43:06,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1612 proven. 274 refuted. 0 times theorem prover too weak. 14521 trivial. 0 not checked. [2025-03-08 05:43:06,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680698739] [2025-03-08 05:43:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680698739] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915373754] [2025-03-08 05:43:06,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:06,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:06,187 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:06,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:43:06,273 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 528 statements into 70 equivalence classes. [2025-03-08 05:43:06,319 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) and asserted 204 of 528 statements. [2025-03-08 05:43:06,319 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2025-03-08 05:43:06,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:06,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:43:06,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1662 proven. 279 refuted. 0 times theorem prover too weak. 14466 trivial. 0 not checked. [2025-03-08 05:43:06,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1668 proven. 305 refuted. 0 times theorem prover too weak. 14434 trivial. 0 not checked. [2025-03-08 05:43:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915373754] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:07,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 17 [2025-03-08 05:43:07,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225046037] [2025-03-08 05:43:07,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:07,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:43:07,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:07,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:43:07,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:43:07,654 INFO L87 Difference]: Start difference. First operand 70 states and 104 transitions. Second operand has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-08 05:43:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:07,855 INFO L93 Difference]: Finished difference Result 185 states and 342 transitions. [2025-03-08 05:43:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:43:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 528 [2025-03-08 05:43:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:07,857 INFO L225 Difference]: With dead ends: 185 [2025-03-08 05:43:07,857 INFO L226 Difference]: Without dead ends: 118 [2025-03-08 05:43:07,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 1047 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:43:07,916 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:07,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 68 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-08 05:43:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 89. [2025-03-08 05:43:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 58 states have internal predecessors, (73), 15 states have call successors, (15), 12 states have call predecessors, (15), 10 states have return successors, (57), 18 states have call predecessors, (57), 15 states have call successors, (57) [2025-03-08 05:43:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2025-03-08 05:43:07,925 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 528 [2025-03-08 05:43:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:07,926 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2025-03-08 05:43:07,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 9 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-08 05:43:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2025-03-08 05:43:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2025-03-08 05:43:07,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:07,931 INFO L218 NwaCegarLoop]: trace histogram [89, 89, 72, 44, 44, 44, 44, 44, 44, 44, 28, 17, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:07,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:08,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 05:43:08,132 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:08,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash -422591514, now seen corresponding path program 10 times [2025-03-08 05:43:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:08,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740928166] [2025-03-08 05:43:08,133 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:08,149 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 610 statements into 2 equivalence classes. [2025-03-08 05:43:08,192 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 519 of 610 statements. [2025-03-08 05:43:08,193 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:43:08,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22004 backedges. 416 proven. 3195 refuted. 0 times theorem prover too weak. 18393 trivial. 0 not checked. [2025-03-08 05:43:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740928166] [2025-03-08 05:43:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740928166] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449457228] [2025-03-08 05:43:08,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:08,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:08,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:43:08,655 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 610 statements into 2 equivalence classes. [2025-03-08 05:43:08,735 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 519 of 610 statements. [2025-03-08 05:43:08,735 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:43:08,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:08,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:43:08,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22004 backedges. 416 proven. 3195 refuted. 0 times theorem prover too weak. 18393 trivial. 0 not checked. [2025-03-08 05:43:08,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22004 backedges. 416 proven. 3272 refuted. 0 times theorem prover too weak. 18316 trivial. 0 not checked. [2025-03-08 05:43:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449457228] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:11,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-08 05:43:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934026921] [2025-03-08 05:43:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:11,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:43:11,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:11,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:43:11,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:43:11,143 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-08 05:43:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:11,344 INFO L93 Difference]: Finished difference Result 105 states and 179 transitions. [2025-03-08 05:43:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:43:11,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 610 [2025-03-08 05:43:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:11,349 INFO L225 Difference]: With dead ends: 105 [2025-03-08 05:43:11,349 INFO L226 Difference]: Without dead ends: 101 [2025-03-08 05:43:11,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1244 GetRequests, 1210 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:43:11,350 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:11,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 102 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-08 05:43:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2025-03-08 05:43:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 61 states have internal predecessors, (76), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (69), 20 states have call predecessors, (69), 16 states have call successors, (69) [2025-03-08 05:43:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 161 transitions. [2025-03-08 05:43:11,358 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 161 transitions. Word has length 610 [2025-03-08 05:43:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:11,359 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 161 transitions. [2025-03-08 05:43:11,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 21 states have internal predecessors, (64), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2025-03-08 05:43:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 161 transitions. [2025-03-08 05:43:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2025-03-08 05:43:11,370 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:11,370 INFO L218 NwaCegarLoop]: trace histogram [139, 139, 112, 69, 69, 69, 69, 69, 69, 69, 43, 27, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:11,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:11,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 05:43:11,571 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:11,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1735542590, now seen corresponding path program 11 times [2025-03-08 05:43:11,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:11,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803762124] [2025-03-08 05:43:11,572 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:11,588 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 950 statements into 121 equivalence classes. [2025-03-08 05:43:11,658 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 515 of 950 statements. [2025-03-08 05:43:11,658 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-03-08 05:43:11,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 53964 backedges. 2989 proven. 2195 refuted. 0 times theorem prover too weak. 48780 trivial. 0 not checked. [2025-03-08 05:43:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803762124] [2025-03-08 05:43:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803762124] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505179856] [2025-03-08 05:43:12,081 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:12,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:12,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:12,083 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:12,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:43:12,217 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 950 statements into 121 equivalence classes. [2025-03-08 05:43:12,344 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 515 of 950 statements. [2025-03-08 05:43:12,344 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-03-08 05:43:12,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:12,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:43:12,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 53964 backedges. 28800 proven. 140 refuted. 0 times theorem prover too weak. 25024 trivial. 0 not checked. [2025-03-08 05:43:12,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53964 backedges. 3242 proven. 2442 refuted. 0 times theorem prover too weak. 48280 trivial. 0 not checked. [2025-03-08 05:43:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505179856] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:14,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:14,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 22 [2025-03-08 05:43:14,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922971446] [2025-03-08 05:43:14,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:14,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:43:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:14,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:43:14,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:43:14,724 INFO L87 Difference]: Start difference. First operand 94 states and 161 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 15 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (25), 9 states have call predecessors, (25), 15 states have call successors, (25) [2025-03-08 05:43:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:14,902 INFO L93 Difference]: Finished difference Result 206 states and 423 transitions. [2025-03-08 05:43:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:43:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 15 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (25), 9 states have call predecessors, (25), 15 states have call successors, (25) Word has length 950 [2025-03-08 05:43:14,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:14,904 INFO L225 Difference]: With dead ends: 206 [2025-03-08 05:43:14,904 INFO L226 Difference]: Without dead ends: 109 [2025-03-08 05:43:14,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1925 GetRequests, 1887 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:43:14,906 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:14,906 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 128 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-08 05:43:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2025-03-08 05:43:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 70 states have internal predecessors, (76), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (75), 20 states have call predecessors, (75), 19 states have call successors, (75) [2025-03-08 05:43:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 170 transitions. [2025-03-08 05:43:14,917 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 170 transitions. Word has length 950 [2025-03-08 05:43:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:14,918 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 170 transitions. [2025-03-08 05:43:14,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 15 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (25), 9 states have call predecessors, (25), 15 states have call successors, (25) [2025-03-08 05:43:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 170 transitions. [2025-03-08 05:43:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2025-03-08 05:43:14,924 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:14,924 INFO L218 NwaCegarLoop]: trace histogram [145, 145, 117, 72, 72, 72, 72, 72, 72, 72, 45, 28, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:14,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:15,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 05:43:15,128 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:15,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -891755835, now seen corresponding path program 12 times [2025-03-08 05:43:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:15,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972239482] [2025-03-08 05:43:15,129 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:15,167 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 991 statements into 126 equivalence classes. [2025-03-08 05:43:15,184 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 175 of 991 statements. [2025-03-08 05:43:15,185 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-08 05:43:15,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 1479 proven. 4620 refuted. 0 times theorem prover too weak. 52671 trivial. 0 not checked. [2025-03-08 05:43:15,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972239482] [2025-03-08 05:43:15,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972239482] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:15,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066444171] [2025-03-08 05:43:15,338 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:15,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:15,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:15,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:15,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:43:15,485 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 991 statements into 126 equivalence classes. [2025-03-08 05:43:15,524 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) and asserted 175 of 991 statements. [2025-03-08 05:43:15,524 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2025-03-08 05:43:15,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:15,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:43:15,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 1479 proven. 4620 refuted. 0 times theorem prover too weak. 52671 trivial. 0 not checked. [2025-03-08 05:43:15,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 1487 proven. 4689 refuted. 0 times theorem prover too weak. 52594 trivial. 0 not checked. [2025-03-08 05:43:18,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066444171] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:18,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:18,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 20 [2025-03-08 05:43:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885429548] [2025-03-08 05:43:18,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:18,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:43:18,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:18,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:43:18,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:43:18,517 INFO L87 Difference]: Start difference. First operand 104 states and 170 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) [2025-03-08 05:43:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:18,631 INFO L93 Difference]: Finished difference Result 123 states and 225 transitions. [2025-03-08 05:43:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:43:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) Word has length 991 [2025-03-08 05:43:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:18,637 INFO L225 Difference]: With dead ends: 123 [2025-03-08 05:43:18,637 INFO L226 Difference]: Without dead ends: 119 [2025-03-08 05:43:18,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2006 GetRequests, 1972 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:43:18,638 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:18,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 90 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-08 05:43:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2025-03-08 05:43:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 70 states have internal predecessors, (76), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (75), 20 states have call predecessors, (75), 19 states have call successors, (75) [2025-03-08 05:43:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 170 transitions. [2025-03-08 05:43:18,657 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 170 transitions. Word has length 991 [2025-03-08 05:43:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:18,659 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 170 transitions. [2025-03-08 05:43:18,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 20 states have internal predecessors, (64), 16 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 11 states have call predecessors, (25), 16 states have call successors, (25) [2025-03-08 05:43:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 170 transitions. [2025-03-08 05:43:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1306 [2025-03-08 05:43:18,669 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:18,670 INFO L218 NwaCegarLoop]: trace histogram [191, 191, 155, 95, 95, 95, 95, 95, 95, 95, 60, 36, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:18,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:18,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 05:43:18,874 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:18,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1500443607, now seen corresponding path program 13 times [2025-03-08 05:43:18,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:18,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462497667] [2025-03-08 05:43:18,875 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:18,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:18,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1305 statements into 1 equivalence classes. [2025-03-08 05:43:19,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1305 of 1305 statements. [2025-03-08 05:43:19,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:19,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 102375 backedges. 1060 proven. 8108 refuted. 0 times theorem prover too weak. 93207 trivial. 0 not checked. [2025-03-08 05:43:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462497667] [2025-03-08 05:43:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462497667] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977221279] [2025-03-08 05:43:20,316 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:20,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:20,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:20,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:20,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:43:20,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1305 statements into 1 equivalence classes. [2025-03-08 05:43:20,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1305 of 1305 statements. [2025-03-08 05:43:20,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:20,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:20,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:43:20,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 102375 backedges. 1060 proven. 8108 refuted. 0 times theorem prover too weak. 93207 trivial. 0 not checked. [2025-03-08 05:43:20,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 102375 backedges. 1060 proven. 8208 refuted. 0 times theorem prover too weak. 93107 trivial. 0 not checked. [2025-03-08 05:43:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977221279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:25,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:25,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 22 [2025-03-08 05:43:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435554471] [2025-03-08 05:43:25,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:25,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:43:25,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:25,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:43:25,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:43:25,076 INFO L87 Difference]: Start difference. First operand 104 states and 170 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 19 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) [2025-03-08 05:43:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:25,257 INFO L93 Difference]: Finished difference Result 128 states and 248 transitions. [2025-03-08 05:43:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:43:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 19 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) Word has length 1305 [2025-03-08 05:43:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:25,262 INFO L225 Difference]: With dead ends: 128 [2025-03-08 05:43:25,263 INFO L226 Difference]: Without dead ends: 124 [2025-03-08 05:43:25,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 2599 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:43:25,264 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:25,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 93 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-08 05:43:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2025-03-08 05:43:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 73 states have internal predecessors, (79), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (89), 22 states have call predecessors, (89), 20 states have call successors, (89) [2025-03-08 05:43:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 188 transitions. [2025-03-08 05:43:25,280 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 188 transitions. Word has length 1305 [2025-03-08 05:43:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:25,282 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 188 transitions. [2025-03-08 05:43:25,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 19 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) [2025-03-08 05:43:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 188 transitions. [2025-03-08 05:43:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1701 [2025-03-08 05:43:25,317 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:25,317 INFO L218 NwaCegarLoop]: trace histogram [249, 249, 202, 124, 124, 124, 124, 124, 124, 124, 78, 47, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:25,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:43:25,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:25,518 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:25,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash 949872064, now seen corresponding path program 14 times [2025-03-08 05:43:25,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:25,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048169146] [2025-03-08 05:43:25,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:25,552 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1700 statements into 2 equivalence classes. [2025-03-08 05:43:25,796 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1700 of 1700 statements. [2025-03-08 05:43:25,796 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:25,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 174309 backedges. 2791 proven. 8416 refuted. 0 times theorem prover too weak. 163102 trivial. 0 not checked. [2025-03-08 05:43:27,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048169146] [2025-03-08 05:43:27,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048169146] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225738704] [2025-03-08 05:43:27,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:27,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:27,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:27,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:43:27,987 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1700 statements into 2 equivalence classes. [2025-03-08 05:43:28,244 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1700 of 1700 statements. [2025-03-08 05:43:28,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:28,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:28,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 3793 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:43:28,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 174309 backedges. 3176 proven. 10261 refuted. 0 times theorem prover too weak. 160872 trivial. 0 not checked. [2025-03-08 05:43:28,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 174309 backedges. 3180 proven. 10374 refuted. 0 times theorem prover too weak. 160755 trivial. 0 not checked. [2025-03-08 05:43:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225738704] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:34,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 27 [2025-03-08 05:43:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776086213] [2025-03-08 05:43:34,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:34,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:43:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:34,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:43:34,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:43:34,435 INFO L87 Difference]: Start difference. First operand 109 states and 188 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 27 states have internal predecessors, (80), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-08 05:43:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:34,603 INFO L93 Difference]: Finished difference Result 195 states and 588 transitions. [2025-03-08 05:43:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:43:34,606 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 27 states have internal predecessors, (80), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) Word has length 1700 [2025-03-08 05:43:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:34,609 INFO L225 Difference]: With dead ends: 195 [2025-03-08 05:43:34,609 INFO L226 Difference]: Without dead ends: 126 [2025-03-08 05:43:34,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3428 GetRequests, 3383 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=429, Invalid=831, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:43:34,612 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:34,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 192 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-03-08 05:43:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2025-03-08 05:43:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 83 states have (on average 1.036144578313253) internal successors, (86), 80 states have internal predecessors, (86), 21 states have call successors, (21), 13 states have call predecessors, (21), 15 states have return successors, (76), 26 states have call predecessors, (76), 21 states have call successors, (76) [2025-03-08 05:43:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2025-03-08 05:43:34,621 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 1700 [2025-03-08 05:43:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:34,622 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2025-03-08 05:43:34,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 27 states have internal predecessors, (80), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-08 05:43:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2025-03-08 05:43:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2025-03-08 05:43:34,630 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:34,631 INFO L218 NwaCegarLoop]: trace histogram [209, 209, 169, 104, 104, 104, 104, 104, 104, 104, 65, 40, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:34,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 05:43:34,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 05:43:34,831 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:34,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1921960573, now seen corresponding path program 15 times [2025-03-08 05:43:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:34,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46229445] [2025-03-08 05:43:34,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:34,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:34,853 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1427 statements into 172 equivalence classes. [2025-03-08 05:43:35,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) and asserted 756 of 1427 statements. [2025-03-08 05:43:35,028 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2025-03-08 05:43:35,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 9738 proven. 1021 refuted. 0 times theorem prover too weak. 111805 trivial. 0 not checked. [2025-03-08 05:43:35,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:35,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46229445] [2025-03-08 05:43:35,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46229445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:35,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870768570] [2025-03-08 05:43:35,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:35,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:35,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:35,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:43:35,867 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1427 statements into 172 equivalence classes. [2025-03-08 05:43:36,164 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) and asserted 756 of 1427 statements. [2025-03-08 05:43:36,165 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2025-03-08 05:43:36,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:36,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:43:36,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 9895 proven. 1014 refuted. 0 times theorem prover too weak. 111655 trivial. 0 not checked. [2025-03-08 05:43:36,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 9899 proven. 1059 refuted. 0 times theorem prover too weak. 111606 trivial. 0 not checked. [2025-03-08 05:43:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870768570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:39,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 21] total 27 [2025-03-08 05:43:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141042304] [2025-03-08 05:43:39,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:39,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:43:39,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:39,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:43:39,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:43:39,845 INFO L87 Difference]: Start difference. First operand 120 states and 183 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (31), 17 states have call predecessors, (31), 13 states have call successors, (31) [2025-03-08 05:43:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:40,139 INFO L93 Difference]: Finished difference Result 280 states and 479 transitions. [2025-03-08 05:43:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 05:43:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (31), 17 states have call predecessors, (31), 13 states have call successors, (31) Word has length 1427 [2025-03-08 05:43:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:40,143 INFO L225 Difference]: With dead ends: 280 [2025-03-08 05:43:40,143 INFO L226 Difference]: Without dead ends: 154 [2025-03-08 05:43:40,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2892 GetRequests, 2838 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 05:43:40,150 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:40,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 170 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:43:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-08 05:43:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2025-03-08 05:43:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 91 states have internal predecessors, (97), 24 states have call successors, (24), 16 states have call predecessors, (24), 16 states have return successors, (75), 27 states have call predecessors, (75), 24 states have call successors, (75) [2025-03-08 05:43:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2025-03-08 05:43:40,162 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 1427 [2025-03-08 05:43:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:40,162 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2025-03-08 05:43:40,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (31), 17 states have call predecessors, (31), 13 states have call successors, (31) [2025-03-08 05:43:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2025-03-08 05:43:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2025-03-08 05:43:40,171 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:40,172 INFO L218 NwaCegarLoop]: trace histogram [199, 199, 161, 99, 99, 99, 99, 99, 99, 99, 62, 38, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:40,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 05:43:40,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 05:43:40,373 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:40,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1565519169, now seen corresponding path program 16 times [2025-03-08 05:43:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139641342] [2025-03-08 05:43:40,373 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:40,392 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1359 statements into 2 equivalence classes. [2025-03-08 05:43:40,488 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1158 of 1359 statements. [2025-03-08 05:43:40,489 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:43:40,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 111088 backedges. 3506 proven. 4297 refuted. 0 times theorem prover too weak. 103285 trivial. 0 not checked. [2025-03-08 05:43:41,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139641342] [2025-03-08 05:43:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139641342] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657601945] [2025-03-08 05:43:41,353 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:41,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:41,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:41,355 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:41,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:43:41,585 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1359 statements into 2 equivalence classes. [2025-03-08 05:43:41,723 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1158 of 1359 statements. [2025-03-08 05:43:41,723 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:43:41,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:41,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:43:41,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 111088 backedges. 4274 proven. 5298 refuted. 0 times theorem prover too weak. 101516 trivial. 0 not checked. [2025-03-08 05:43:41,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 111088 backedges. 4280 proven. 5386 refuted. 0 times theorem prover too weak. 101422 trivial. 0 not checked. [2025-03-08 05:43:46,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657601945] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:46,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 25 [2025-03-08 05:43:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470223167] [2025-03-08 05:43:46,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:46,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:43:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:46,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:43:46,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:43:46,012 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:43:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:46,133 INFO L93 Difference]: Finished difference Result 164 states and 234 transitions. [2025-03-08 05:43:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:43:46,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) Word has length 1359 [2025-03-08 05:43:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:46,136 INFO L225 Difference]: With dead ends: 164 [2025-03-08 05:43:46,136 INFO L226 Difference]: Without dead ends: 149 [2025-03-08 05:43:46,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2743 GetRequests, 2702 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:43:46,137 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:46,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2025-03-08 05:43:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2025-03-08 05:43:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 96 states have internal predecessors, (102), 25 states have call successors, (25), 16 states have call predecessors, (25), 18 states have return successors, (80), 30 states have call predecessors, (80), 25 states have call successors, (80) [2025-03-08 05:43:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 207 transitions. [2025-03-08 05:43:46,146 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 207 transitions. Word has length 1359 [2025-03-08 05:43:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:46,146 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 207 transitions. [2025-03-08 05:43:46,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:43:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 207 transitions. [2025-03-08 05:43:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2025-03-08 05:43:46,155 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:46,155 INFO L218 NwaCegarLoop]: trace histogram [207, 207, 167, 103, 103, 103, 103, 103, 103, 103, 64, 40, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:46,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 05:43:46,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:46,356 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:46,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:46,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1380814201, now seen corresponding path program 17 times [2025-03-08 05:43:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311502079] [2025-03-08 05:43:46,357 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:46,377 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1413 statements into 161 equivalence classes. [2025-03-08 05:43:46,413 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) and asserted 577 of 1413 statements. [2025-03-08 05:43:46,414 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2025-03-08 05:43:46,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 120157 backedges. 6056 proven. 6947 refuted. 0 times theorem prover too weak. 107154 trivial. 0 not checked. [2025-03-08 05:43:46,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311502079] [2025-03-08 05:43:46,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311502079] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205370248] [2025-03-08 05:43:46,943 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:46,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:46,945 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:46,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:43:47,198 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1413 statements into 161 equivalence classes. [2025-03-08 05:43:47,321 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) and asserted 577 of 1413 statements. [2025-03-08 05:43:47,322 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2025-03-08 05:43:47,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:47,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:43:47,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 120157 backedges. 64698 proven. 865 refuted. 0 times theorem prover too weak. 54594 trivial. 0 not checked. [2025-03-08 05:43:47,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 120157 backedges. 6294 proven. 7465 refuted. 0 times theorem prover too weak. 106398 trivial. 0 not checked. [2025-03-08 05:43:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205370248] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:52,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:52,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 23] total 31 [2025-03-08 05:43:52,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050483750] [2025-03-08 05:43:52,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:52,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 05:43:52,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:52,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 05:43:52,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:43:52,032 INFO L87 Difference]: Start difference. First operand 143 states and 207 transitions. Second operand has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 31 states have internal predecessors, (97), 23 states have call successors, (30), 2 states have call predecessors, (30), 13 states have return successors, (39), 15 states have call predecessors, (39), 23 states have call successors, (39) [2025-03-08 05:43:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:52,349 INFO L93 Difference]: Finished difference Result 307 states and 502 transitions. [2025-03-08 05:43:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:43:52,349 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 31 states have internal predecessors, (97), 23 states have call successors, (30), 2 states have call predecessors, (30), 13 states have return successors, (39), 15 states have call predecessors, (39), 23 states have call successors, (39) Word has length 1413 [2025-03-08 05:43:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:52,351 INFO L225 Difference]: With dead ends: 307 [2025-03-08 05:43:52,351 INFO L226 Difference]: Without dead ends: 167 [2025-03-08 05:43:52,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2865 GetRequests, 2808 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 05:43:52,354 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 73 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:52,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 214 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:43:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2025-03-08 05:43:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2025-03-08 05:43:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 98 states have internal predecessors, (104), 27 states have call successors, (27), 20 states have call predecessors, (27), 14 states have return successors, (60), 24 states have call predecessors, (60), 27 states have call successors, (60) [2025-03-08 05:43:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 191 transitions. [2025-03-08 05:43:52,369 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 191 transitions. Word has length 1413 [2025-03-08 05:43:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:52,369 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 191 transitions. [2025-03-08 05:43:52,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 31 states have internal predecessors, (97), 23 states have call successors, (30), 2 states have call predecessors, (30), 13 states have return successors, (39), 15 states have call predecessors, (39), 23 states have call successors, (39) [2025-03-08 05:43:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 191 transitions. [2025-03-08 05:43:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2025-03-08 05:43:52,377 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:52,378 INFO L218 NwaCegarLoop]: trace histogram [199, 199, 161, 99, 99, 99, 99, 99, 99, 99, 62, 38, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:52,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 05:43:52,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:52,579 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:52,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1444061741, now seen corresponding path program 18 times [2025-03-08 05:43:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:52,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312930994] [2025-03-08 05:43:52,580 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:52,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:52,600 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1359 statements into 161 equivalence classes. [2025-03-08 05:43:52,812 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 138 check-sat command(s) and asserted 1172 of 1359 statements. [2025-03-08 05:43:52,812 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 138 check-sat command(s) [2025-03-08 05:43:52,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 111088 backedges. 7334 proven. 1534 refuted. 0 times theorem prover too weak. 102220 trivial. 0 not checked. [2025-03-08 05:43:53,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:53,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312930994] [2025-03-08 05:43:53,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312930994] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:53,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213310795] [2025-03-08 05:43:53,548 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:53,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:53,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:53,550 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:53,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:43:53,858 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1359 statements into 161 equivalence classes. [2025-03-08 05:43:54,345 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 138 check-sat command(s) and asserted 1172 of 1359 statements. [2025-03-08 05:43:54,345 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 138 check-sat command(s) [2025-03-08 05:43:54,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:54,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 2620 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:43:54,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 111088 backedges. 31394 proven. 517 refuted. 0 times theorem prover too weak. 79177 trivial. 0 not checked. [2025-03-08 05:43:54,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 111088 backedges. 7332 proven. 1559 refuted. 0 times theorem prover too weak. 102197 trivial. 0 not checked. [2025-03-08 05:43:57,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213310795] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:57,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:57,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 21 [2025-03-08 05:43:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103600814] [2025-03-08 05:43:57,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:57,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:43:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:57,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:43:57,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:43:57,376 INFO L87 Difference]: Start difference. First operand 143 states and 191 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 10 states have call successors, (21), 2 states have call predecessors, (21), 10 states have return successors, (28), 15 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-08 05:43:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:57,551 INFO L93 Difference]: Finished difference Result 305 states and 411 transitions. [2025-03-08 05:43:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:43:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 10 states have call successors, (21), 2 states have call predecessors, (21), 10 states have return successors, (28), 15 states have call predecessors, (28), 10 states have call successors, (28) Word has length 1359 [2025-03-08 05:43:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:57,555 INFO L225 Difference]: With dead ends: 305 [2025-03-08 05:43:57,555 INFO L226 Difference]: Without dead ends: 148 [2025-03-08 05:43:57,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2706 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:43:57,557 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:57,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-03-08 05:43:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2025-03-08 05:43:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 96 states have internal predecessors, (102), 27 states have call successors, (27), 21 states have call predecessors, (27), 12 states have return successors, (45), 21 states have call predecessors, (45), 27 states have call successors, (45) [2025-03-08 05:43:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2025-03-08 05:43:57,565 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 1359 [2025-03-08 05:43:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:57,566 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2025-03-08 05:43:57,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 10 states have call successors, (21), 2 states have call predecessors, (21), 10 states have return successors, (28), 15 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-08 05:43:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2025-03-08 05:43:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2025-03-08 05:43:57,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:57,573 INFO L218 NwaCegarLoop]: trace histogram [187, 187, 151, 93, 93, 93, 93, 93, 93, 93, 58, 36, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:57,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:57,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:57,774 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:57,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 929528851, now seen corresponding path program 19 times [2025-03-08 05:43:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246808431] [2025-03-08 05:43:57,774 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:57,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:57,793 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1277 statements into 1 equivalence classes. [2025-03-08 05:43:57,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1277 of 1277 statements. [2025-03-08 05:43:57,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:57,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 3762 proven. 3551 refuted. 0 times theorem prover too weak. 90688 trivial. 0 not checked. [2025-03-08 05:43:58,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:58,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246808431] [2025-03-08 05:43:58,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246808431] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:58,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844432955] [2025-03-08 05:43:58,971 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:58,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:58,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:58,973 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:58,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 05:43:59,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1277 statements into 1 equivalence classes. [2025-03-08 05:43:59,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1277 of 1277 statements. [2025-03-08 05:43:59,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:59,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:59,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:43:59,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 4626 proven. 4340 refuted. 0 times theorem prover too weak. 89035 trivial. 0 not checked. [2025-03-08 05:43:59,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 4630 proven. 4430 refuted. 0 times theorem prover too weak. 88941 trivial. 0 not checked. [2025-03-08 05:44:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844432955] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:03,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:03,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 25 [2025-03-08 05:44:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509523280] [2025-03-08 05:44:03,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:03,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:44:03,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:03,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:44:03,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:44:03,386 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:44:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:03,529 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2025-03-08 05:44:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:44:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) Word has length 1277 [2025-03-08 05:44:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:03,532 INFO L225 Difference]: With dead ends: 157 [2025-03-08 05:44:03,532 INFO L226 Difference]: Without dead ends: 125 [2025-03-08 05:44:03,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2579 GetRequests, 2538 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:44:03,536 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:03,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 172 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-08 05:44:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2025-03-08 05:44:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 states have internal predecessors, (83), 22 states have call successors, (22), 16 states have call predecessors, (22), 11 states have return successors, (34), 19 states have call predecessors, (34), 22 states have call successors, (34) [2025-03-08 05:44:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2025-03-08 05:44:03,545 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 1277 [2025-03-08 05:44:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:03,545 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2025-03-08 05:44:03,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 25 states have internal predecessors, (74), 18 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:44:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2025-03-08 05:44:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2025-03-08 05:44:03,552 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:03,552 INFO L218 NwaCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:03,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:03,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-08 05:44:03,753 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:03,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash -686723943, now seen corresponding path program 20 times [2025-03-08 05:44:03,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:03,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026338841] [2025-03-08 05:44:03,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:03,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:03,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1209 statements into 2 equivalence classes. [2025-03-08 05:44:03,867 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1209 of 1209 statements. [2025-03-08 05:44:03,868 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:03,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat