./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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_25-2.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 9030972e60093099261ffd255cd123d40a9b99982e16d5d1c2c77af1369268fd --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:33:47,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:33:47,920 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:33:47,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:33:47,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:33:47,945 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:33:47,946 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:33:47,946 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:33:47,946 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:33:47,946 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:33:47,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:33:47,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:33:47,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:33:47,947 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:33:47,947 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:33:47,948 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:33:47,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:47,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:33:47,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:33:47,949 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 -> 9030972e60093099261ffd255cd123d40a9b99982e16d5d1c2c77af1369268fd [2025-03-03 14:33:48,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:33:48,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:33:48,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:33:48,166 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:33:48,166 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:33:48,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_25-2.c [2025-03-03 14:33:49,318 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0e7fcb6/28b7b1d99ba74538a4b5af34b1c6a582/FLAGde07497aa [2025-03-03 14:33:49,558 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:33:49,559 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_25-2.c [2025-03-03 14:33:49,564 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0e7fcb6/28b7b1d99ba74538a4b5af34b1c6a582/FLAGde07497aa [2025-03-03 14:33:49,876 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0e7fcb6/28b7b1d99ba74538a4b5af34b1c6a582 [2025-03-03 14:33:49,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:33:49,878 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:33:49,879 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:49,879 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:33:49,882 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:33:49,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:49" (1/1) ... [2025-03-03 14:33:49,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed4db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:49, skipping insertion in model container [2025-03-03 14:33:49,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:49" (1/1) ... [2025-03-03 14:33:49,892 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:33:49,993 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_25-2.c[746,759] [2025-03-03 14:33:49,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:50,005 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:33:50,014 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_25-2.c[746,759] [2025-03-03 14:33:50,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:50,025 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:33:50,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50 WrapperNode [2025-03-03 14:33:50,026 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:50,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:50,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:33:50,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:33:50,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,046 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:33:50,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:50,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:33:50,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:33:50,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:33:50,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,063 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]. [2025-03-03 14:33:50,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,065 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,066 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:33:50,068 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:33:50,068 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:33:50,068 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:33:50,070 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (1/1) ... [2025-03-03 14:33:50,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:50,095 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) [2025-03-03 14:33:50,098 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 [2025-03-03 14:33:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:33:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:33:50,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:33:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:33:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2025-03-03 14:33:50,116 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2025-03-03 14:33:50,157 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:33:50,158 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:33:50,234 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L13: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:33:50,242 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 14:33:50,242 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:33:50,250 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:33:50,251 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:33:50,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:50 BoogieIcfgContainer [2025-03-03 14:33:50,251 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:33:50,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:33:50,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:33:50,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:33:50,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:33:49" (1/3) ... [2025-03-03 14:33:50,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2921c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:50, skipping insertion in model container [2025-03-03 14:33:50,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:50" (2/3) ... [2025-03-03 14:33:50,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2921c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:50, skipping insertion in model container [2025-03-03 14:33:50,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:50" (3/3) ... [2025-03-03 14:33:50,259 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2025-03-03 14:33:50,272 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:33:50,274 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_25-2.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:33:50,309 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:33:50,319 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;@2bfa74c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:33:50,319 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:33:50,322 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) [2025-03-03 14:33:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:33:50,327 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:50,327 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:50,328 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:50,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash 402921910, now seen corresponding path program 1 times [2025-03-03 14:33:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:50,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724482374] [2025-03-03 14:33:50,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:50,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:33:50,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:33:50,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:50,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:33:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724482374] [2025-03-03 14:33:50,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724482374] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:50,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862151202] [2025-03-03 14:33:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:50,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:50,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:50,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:50,528 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) [2025-03-03 14:33:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:50,597 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2025-03-03 14:33:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:50,601 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 [2025-03-03 14:33:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:50,606 INFO L225 Difference]: With dead ends: 32 [2025-03-03 14:33:50,606 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:33:50,608 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 [2025-03-03 14:33:50,609 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 [2025-03-03 14:33:50,610 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] [2025-03-03 14:33:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:33:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-03 14:33:50,633 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) [2025-03-03 14:33:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 14:33:50,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2025-03-03 14:33:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:50,639 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 14:33:50,639 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) [2025-03-03 14:33:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 14:33:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:33:50,641 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:50,641 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:50,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:33:50,641 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:50,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2143228819, now seen corresponding path program 1 times [2025-03-03 14:33:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:50,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043086222] [2025-03-03 14:33:50,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:50,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:50,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:33:50,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:33:50,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:50,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:33:50,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:50,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043086222] [2025-03-03 14:33:50,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043086222] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:50,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:50,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:50,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658860880] [2025-03-03 14:33:50,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:50,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:50,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:50,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:50,715 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) [2025-03-03 14:33:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:50,766 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2025-03-03 14:33:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:50,767 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 [2025-03-03 14:33:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:50,767 INFO L225 Difference]: With dead ends: 24 [2025-03-03 14:33:50,767 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:33:50,768 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 [2025-03-03 14:33:50,768 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 [2025-03-03 14:33:50,768 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] [2025-03-03 14:33:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:33:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2025-03-03 14:33:50,772 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) [2025-03-03 14:33:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 14:33:50,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2025-03-03 14:33:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:50,773 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 14:33:50,773 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) [2025-03-03 14:33:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 14:33:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:33:50,773 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:50,774 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:50,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:33:50,775 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:50,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1857137997, now seen corresponding path program 1 times [2025-03-03 14:33:50,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:50,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267797069] [2025-03-03 14:33:50,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:50,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:50,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:50,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:50,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:50,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:33:50,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267797069] [2025-03-03 14:33:50,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267797069] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:50,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481648976] [2025-03-03 14:33:50,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:50,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:50,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:50,899 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) [2025-03-03 14:33:50,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:33:50,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:50,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:50,941 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:50,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:50,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:50,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:33:51,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:33:51,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481648976] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:51,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:51,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2025-03-03 14:33:51,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37955164] [2025-03-03 14:33:51,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:51,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:33:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:51,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:33:51,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:33:51,200 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) [2025-03-03 14:33:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:51,270 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2025-03-03 14:33:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:33:51,270 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 [2025-03-03 14:33:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:51,271 INFO L225 Difference]: With dead ends: 35 [2025-03-03 14:33:51,271 INFO L226 Difference]: Without dead ends: 20 [2025-03-03 14:33:51,271 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 [2025-03-03 14:33:51,272 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 [2025-03-03 14:33:51,272 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] [2025-03-03 14:33:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-03 14:33:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-03 14:33:51,275 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) [2025-03-03 14:33:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2025-03-03 14:33:51,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2025-03-03 14:33:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:51,276 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2025-03-03 14:33:51,276 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) [2025-03-03 14:33:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2025-03-03 14:33:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:33:51,277 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:51,277 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:51,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:51,477 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 [2025-03-03 14:33:51,478 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:51,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -318077138, now seen corresponding path program 1 times [2025-03-03 14:33:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:51,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102613215] [2025-03-03 14:33:51,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:51,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:51,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:51,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:51,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:51,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:33:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102613215] [2025-03-03 14:33:51,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102613215] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444138497] [2025-03-03 14:33:51,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:51,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:51,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:51,552 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) [2025-03-03 14:33:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:33:51,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:51,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:51,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:51,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:51,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:51,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:33:51,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 14:33:51,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444138497] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:51,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:51,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2025-03-03 14:33:51,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754876351] [2025-03-03 14:33:51,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:51,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 14:33:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:51,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 14:33:51,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:33:51,734 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) [2025-03-03 14:33:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:51,783 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2025-03-03 14:33:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:33:51,783 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 [2025-03-03 14:33:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:51,784 INFO L225 Difference]: With dead ends: 29 [2025-03-03 14:33:51,784 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 14:33:51,784 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 [2025-03-03 14:33:51,785 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 [2025-03-03 14:33:51,785 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] [2025-03-03 14:33:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 14:33:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 14:33:51,788 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) [2025-03-03 14:33:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2025-03-03 14:33:51,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2025-03-03 14:33:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:51,789 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2025-03-03 14:33:51,789 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) [2025-03-03 14:33:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2025-03-03 14:33:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:33:51,791 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:51,791 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:51,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:51,991 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 [2025-03-03 14:33:51,991 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:51,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -896080901, now seen corresponding path program 2 times [2025-03-03 14:33:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545175465] [2025-03-03 14:33:51,992 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:51,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 14:33:52,008 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:33:52,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:52,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 14:33:52,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:52,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545175465] [2025-03-03 14:33:52,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545175465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:52,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191719587] [2025-03-03 14:33:52,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:33:52,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:52,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:52,135 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) [2025-03-03 14:33:52,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:33:52,162 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-03 14:33:52,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:33:52,174 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:33:52,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:52,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:33:52,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:33:52,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 14:33:52,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191719587] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:52,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:52,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 18 [2025-03-03 14:33:52,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378617235] [2025-03-03 14:33:52,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:52,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:33:52,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:52,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:33:52,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:33:52,546 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) [2025-03-03 14:33:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:52,728 INFO L93 Difference]: Finished difference Result 60 states and 93 transitions. [2025-03-03 14:33:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:33:52,728 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 [2025-03-03 14:33:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:52,729 INFO L225 Difference]: With dead ends: 60 [2025-03-03 14:33:52,729 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:33:52,730 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 [2025-03-03 14:33:52,730 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 [2025-03-03 14:33:52,730 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] [2025-03-03 14:33:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:33:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-03-03 14:33:52,734 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) [2025-03-03 14:33:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2025-03-03 14:33:52,734 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2025-03-03 14:33:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:52,735 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2025-03-03 14:33:52,735 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) [2025-03-03 14:33:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2025-03-03 14:33:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-03 14:33:52,736 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:52,736 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:52,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 14:33:52,940 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 [2025-03-03 14:33:52,940 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:52,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1467785241, now seen corresponding path program 3 times [2025-03-03 14:33:52,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:52,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920244775] [2025-03-03 14:33:52,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:52,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:52,947 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-03 14:33:52,966 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-03 14:33:52,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:33:52,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-03 14:33:53,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:53,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920244775] [2025-03-03 14:33:53,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920244775] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:53,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027550236] [2025-03-03 14:33:53,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:33:53,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:53,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:53,061 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) [2025-03-03 14:33:53,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:33:53,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 93 statements into 12 equivalence classes. [2025-03-03 14:33:53,116 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 59 of 93 statements. [2025-03-03 14:33:53,117 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:33:53,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:33:53,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-03 14:33:53,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2025-03-03 14:33:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027550236] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:53,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-03 14:33:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349508978] [2025-03-03 14:33:53,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:53,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:33:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:53,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:33:53,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:33:53,446 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) [2025-03-03 14:33:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:53,527 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2025-03-03 14:33:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:33:53,528 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 [2025-03-03 14:33:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:53,529 INFO L225 Difference]: With dead ends: 72 [2025-03-03 14:33:53,529 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 14:33:53,529 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 [2025-03-03 14:33:53,530 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:53,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 14:33:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-03 14:33:53,534 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) [2025-03-03 14:33:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-03 14:33:53,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 93 [2025-03-03 14:33:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:53,535 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-03 14:33:53,535 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) [2025-03-03 14:33:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-03 14:33:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 14:33:53,536 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:53,536 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:53,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 14:33:53,736 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 [2025-03-03 14:33:53,737 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:53,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 152396661, now seen corresponding path program 4 times [2025-03-03 14:33:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:53,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812269655] [2025-03-03 14:33:53,737 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:53,741 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-03 14:33:53,750 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 14:33:53,750 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:33:53,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 96 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-03 14:33:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812269655] [2025-03-03 14:33:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812269655] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188371885] [2025-03-03 14:33:53,866 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:33:53,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:53,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:53,868 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) [2025-03-03 14:33:53,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:33:53,894 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 65 statements into 2 equivalence classes. [2025-03-03 14:33:53,910 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 14:33:53,910 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 14:33:53,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:53,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:33:53,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-03 14:33:53,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2025-03-03 14:33:54,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188371885] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:54,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:54,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2025-03-03 14:33:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89156740] [2025-03-03 14:33:54,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:54,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:54,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:54,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:54,376 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-03 14:33:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:54,558 INFO L93 Difference]: Finished difference Result 89 states and 122 transitions. [2025-03-03 14:33:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:33:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 65 [2025-03-03 14:33:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:54,561 INFO L225 Difference]: With dead ends: 89 [2025-03-03 14:33:54,563 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 14:33:54,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:54,564 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:54,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 97 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 14:33:54,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2025-03-03 14:33:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 51 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (34), 19 states have call predecessors, (34), 14 states have call successors, (34) [2025-03-03 14:33:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2025-03-03 14:33:54,582 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 65 [2025-03-03 14:33:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:54,582 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2025-03-03 14:33:54,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-03 14:33:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2025-03-03 14:33:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2025-03-03 14:33:54,589 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:54,589 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:54,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:54,789 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 [2025-03-03 14:33:54,790 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:54,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1241057303, now seen corresponding path program 5 times [2025-03-03 14:33:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:54,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865229844] [2025-03-03 14:33:54,790 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:54,799 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 269 statements into 30 equivalence classes. [2025-03-03 14:33:54,828 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 190 of 269 statements. [2025-03-03 14:33:54,828 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 14:33:54,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 409 proven. 906 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2025-03-03 14:33:55,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:55,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865229844] [2025-03-03 14:33:55,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865229844] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:55,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107386209] [2025-03-03 14:33:55,164 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:33:55,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:55,166 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) [2025-03-03 14:33:55,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:33:55,209 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 269 statements into 30 equivalence classes. [2025-03-03 14:33:55,258 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) and asserted 190 of 269 statements. [2025-03-03 14:33:55,258 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2025-03-03 14:33:55,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:33:55,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 2372 proven. 241 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2025-03-03 14:33:55,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 413 proven. 1025 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2025-03-03 14:33:56,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107386209] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:56,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 24 [2025-03-03 14:33:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651753349] [2025-03-03 14:33:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:56,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:33:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:56,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:33:56,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:33:56,561 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:33:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:56,809 INFO L93 Difference]: Finished difference Result 185 states and 289 transitions. [2025-03-03 14:33:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 14:33:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) Word has length 269 [2025-03-03 14:33:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:56,812 INFO L225 Difference]: With dead ends: 185 [2025-03-03 14:33:56,813 INFO L226 Difference]: Without dead ends: 84 [2025-03-03 14:33:56,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 525 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:33:56,816 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:56,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 119 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-03 14:33:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2025-03-03 14:33:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (33), 17 states have call predecessors, (33), 13 states have call successors, (33) [2025-03-03 14:33:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2025-03-03 14:33:56,830 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 269 [2025-03-03 14:33:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:56,830 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2025-03-03 14:33:56,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (25), 2 states have call predecessors, (25), 9 states have return successors, (31), 13 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:33:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2025-03-03 14:33:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2025-03-03 14:33:56,835 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:56,835 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:56,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:57,035 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 [2025-03-03 14:33:57,036 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:57,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash -555793953, now seen corresponding path program 6 times [2025-03-03 14:33:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:57,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733292562] [2025-03-03 14:33:57,036 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:57,043 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 215 statements into 28 equivalence classes. [2025-03-03 14:33:57,056 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 125 of 215 statements. [2025-03-03 14:33:57,056 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 14:33:57,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2025-03-03 14:33:57,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733292562] [2025-03-03 14:33:57,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733292562] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676966906] [2025-03-03 14:33:57,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:33:57,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:57,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:57,173 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) [2025-03-03 14:33:57,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:33:57,216 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 215 statements into 28 equivalence classes. [2025-03-03 14:33:57,244 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 125 of 215 statements. [2025-03-03 14:33:57,244 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-03 14:33:57,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:57,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:57,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 241 proven. 445 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2025-03-03 14:33:57,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 243 proven. 467 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2025-03-03 14:33:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676966906] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:58,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:58,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2025-03-03 14:33:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829372770] [2025-03-03 14:33:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:58,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 14:33:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:58,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 14:33:58,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-03-03 14:33:58,015 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-03 14:33:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:58,095 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2025-03-03 14:33:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:33:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 215 [2025-03-03 14:33:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:58,097 INFO L225 Difference]: With dead ends: 93 [2025-03-03 14:33:58,097 INFO L226 Difference]: Without dead ends: 89 [2025-03-03 14:33:58,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 423 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:33:58,098 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:58,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-03 14:33:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-03-03 14:33:58,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 54 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 11 states have return successors, (36), 18 states have call predecessors, (36), 13 states have call successors, (36) [2025-03-03 14:33:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2025-03-03 14:33:58,111 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 215 [2025-03-03 14:33:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:58,113 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2025-03-03 14:33:58,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 15 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-03 14:33:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2025-03-03 14:33:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2025-03-03 14:33:58,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:58,115 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 34, 20, 20, 20, 20, 20, 20, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:58,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:58,319 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 [2025-03-03 14:33:58,319 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:58,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2062059334, now seen corresponding path program 7 times [2025-03-03 14:33:58,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:58,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221636488] [2025-03-03 14:33:58,319 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:58,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 284 statements into 1 equivalence classes. [2025-03-03 14:33:58,339 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 284 of 284 statements. [2025-03-03 14:33:58,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 990 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2025-03-03 14:33:58,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221636488] [2025-03-03 14:33:58,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221636488] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222853068] [2025-03-03 14:33:58,548 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:33:58,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:58,549 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) [2025-03-03 14:33:58,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:33:58,603 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 284 statements into 1 equivalence classes. [2025-03-03 14:33:58,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 284 of 284 statements. [2025-03-03 14:33:58,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:33:58,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 990 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2025-03-03 14:33:58,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 168 proven. 1030 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-03 14:33:59,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222853068] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:59,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:59,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2025-03-03 14:33:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303778083] [2025-03-03 14:33:59,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:59,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:59,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:59,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:59,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:59,735 INFO L87 Difference]: Start difference. First operand 81 states and 108 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) [2025-03-03 14:33:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:59,837 INFO L93 Difference]: Finished difference Result 95 states and 144 transitions. [2025-03-03 14:33:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:33:59,838 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 284 [2025-03-03 14:33:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:59,839 INFO L225 Difference]: With dead ends: 95 [2025-03-03 14:33:59,839 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 14:33:59,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:59,840 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:59,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 76 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 14:33:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2025-03-03 14:33:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 55 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 11 states have return successors, (43), 19 states have call predecessors, (43), 14 states have call successors, (43) [2025-03-03 14:33:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2025-03-03 14:33:59,848 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 284 [2025-03-03 14:33:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:59,848 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2025-03-03 14:33:59,849 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) [2025-03-03 14:33:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2025-03-03 14:33:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2025-03-03 14:33:59,851 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:59,851 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:59,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:00,055 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 [2025-03-03 14:34:00,055 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:00,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1474401376, now seen corresponding path program 8 times [2025-03-03 14:34:00,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:00,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127120432] [2025-03-03 14:34:00,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:00,063 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 310 statements into 2 equivalence classes. [2025-03-03 14:34:00,078 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-03 14:34:00,078 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:00,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2025-03-03 14:34:00,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127120432] [2025-03-03 14:34:00,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127120432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:00,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975034004] [2025-03-03 14:34:00,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:00,310 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) [2025-03-03 14:34:00,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:34:00,372 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 310 statements into 2 equivalence classes. [2025-03-03 14:34:00,424 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-03 14:34:00,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:00,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:34:00,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2025-03-03 14:34:00,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1316 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2025-03-03 14:34:01,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975034004] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:01,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:01,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2025-03-03 14:34:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023938932] [2025-03-03 14:34:01,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:01,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:34:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:01,886 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:34:01,886 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:34:01,886 INFO L87 Difference]: Start difference. First operand 83 states and 117 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) [2025-03-03 14:34:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:02,006 INFO L93 Difference]: Finished difference Result 92 states and 137 transitions. [2025-03-03 14:34:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:34:02,007 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 310 [2025-03-03 14:34:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:02,008 INFO L225 Difference]: With dead ends: 92 [2025-03-03 14:34:02,008 INFO L226 Difference]: Without dead ends: 88 [2025-03-03 14:34:02,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 611 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:34:02,009 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:02,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-03 14:34:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2025-03-03 14:34:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.05) internal successors, (63), 58 states have internal predecessors, (63), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (55), 21 states have call predecessors, (55), 15 states have call successors, (55) [2025-03-03 14:34:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2025-03-03 14:34:02,018 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 310 [2025-03-03 14:34:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:02,018 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2025-03-03 14:34:02,019 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) [2025-03-03 14:34:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2025-03-03 14:34:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2025-03-03 14:34:02,027 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:02,027 INFO L218 NwaCegarLoop]: trace histogram [85, 85, 69, 42, 42, 42, 42, 42, 42, 42, 27, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:02,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:02,231 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 [2025-03-03 14:34:02,231 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:02,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash -60838961, now seen corresponding path program 9 times [2025-03-03 14:34:02,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:02,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165290881] [2025-03-03 14:34:02,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:02,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:02,248 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 583 statements into 78 equivalence classes. [2025-03-03 14:34:02,278 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 583 statements. [2025-03-03 14:34:02,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-03 14:34:02,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 2966 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2025-03-03 14:34:02,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165290881] [2025-03-03 14:34:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165290881] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890484487] [2025-03-03 14:34:02,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:02,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:02,510 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) [2025-03-03 14:34:02,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:34:02,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 583 statements into 78 equivalence classes. [2025-03-03 14:34:02,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) and asserted 245 of 583 statements. [2025-03-03 14:34:02,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2025-03-03 14:34:02,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:02,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 2966 refuted. 0 times theorem prover too weak. 16635 trivial. 0 not checked. [2025-03-03 14:34:02,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20070 backedges. 469 proven. 3043 refuted. 0 times theorem prover too weak. 16558 trivial. 0 not checked. [2025-03-03 14:34:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890484487] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:04,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-03 14:34:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18771850] [2025-03-03 14:34:04,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:04,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:34:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:04,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:34:04,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:34:04,922 INFO L87 Difference]: Start difference. First operand 88 states and 133 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) [2025-03-03 14:34:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:05,097 INFO L93 Difference]: Finished difference Result 97 states and 155 transitions. [2025-03-03 14:34:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:34:05,098 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 583 [2025-03-03 14:34:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:05,100 INFO L225 Difference]: With dead ends: 97 [2025-03-03 14:34:05,100 INFO L226 Difference]: Without dead ends: 93 [2025-03-03 14:34:05,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1156 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:05,100 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:05,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 102 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-03 14:34:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-03-03 14:34:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 61 states have internal predecessors, (66), 16 states have call successors, (16), 8 states have call predecessors, (16), 13 states have return successors, (69), 23 states have call predecessors, (69), 16 states have call successors, (69) [2025-03-03 14:34:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 151 transitions. [2025-03-03 14:34:05,108 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 151 transitions. Word has length 583 [2025-03-03 14:34:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:05,109 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 151 transitions. [2025-03-03 14:34:05,109 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) [2025-03-03 14:34:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 151 transitions. [2025-03-03 14:34:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2025-03-03 14:34:05,114 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:05,114 INFO L218 NwaCegarLoop]: trace histogram [141, 141, 114, 70, 70, 70, 70, 70, 70, 70, 44, 27, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:05,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:05,314 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 [2025-03-03 14:34:05,315 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:05,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:05,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1772432010, now seen corresponding path program 10 times [2025-03-03 14:34:05,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:05,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399702208] [2025-03-03 14:34:05,316 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:05,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:05,332 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 964 statements into 2 equivalence classes. [2025-03-03 14:34:05,390 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 820 of 964 statements. [2025-03-03 14:34:05,390 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:05,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 1293 proven. 6424 refuted. 0 times theorem prover too weak. 47864 trivial. 0 not checked. [2025-03-03 14:34:05,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399702208] [2025-03-03 14:34:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399702208] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417299465] [2025-03-03 14:34:05,997 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:05,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:05,999 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) [2025-03-03 14:34:06,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:34:06,132 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 964 statements into 2 equivalence classes. [2025-03-03 14:34:06,253 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 820 of 964 statements. [2025-03-03 14:34:06,254 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:06,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:06,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:06,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 20187 proven. 843 refuted. 0 times theorem prover too weak. 34551 trivial. 0 not checked. [2025-03-03 14:34:06,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 1383 proven. 7581 refuted. 0 times theorem prover too weak. 46617 trivial. 0 not checked. [2025-03-03 14:34:09,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417299465] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:09,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:09,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-03-03 14:34:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478106984] [2025-03-03 14:34:09,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:09,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:34:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:09,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:34:09,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:09,888 INFO L87 Difference]: Start difference. First operand 93 states and 151 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-03 14:34:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:10,205 INFO L93 Difference]: Finished difference Result 193 states and 378 transitions. [2025-03-03 14:34:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-03 14:34:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) Word has length 964 [2025-03-03 14:34:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:10,207 INFO L225 Difference]: With dead ends: 193 [2025-03-03 14:34:10,207 INFO L226 Difference]: Without dead ends: 103 [2025-03-03 14:34:10,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1968 GetRequests, 1910 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 14:34:10,209 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:10,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 140 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-03 14:34:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2025-03-03 14:34:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (51), 17 states have call predecessors, (51), 15 states have call successors, (51) [2025-03-03 14:34:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 128 transitions. [2025-03-03 14:34:10,221 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 128 transitions. Word has length 964 [2025-03-03 14:34:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:10,221 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 128 transitions. [2025-03-03 14:34:10,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 13 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-03 14:34:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 128 transitions. [2025-03-03 14:34:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2025-03-03 14:34:10,227 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:10,227 INFO L218 NwaCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:10,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 14:34:10,427 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 [2025-03-03 14:34:10,428 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:10,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1898637249, now seen corresponding path program 11 times [2025-03-03 14:34:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641673402] [2025-03-03 14:34:10,428 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:10,446 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1059 statements into 126 equivalence classes. [2025-03-03 14:34:10,525 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) and asserted 513 of 1059 statements. [2025-03-03 14:34:10,525 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2025-03-03 14:34:10,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 5023 proven. 5215 refuted. 0 times theorem prover too weak. 56956 trivial. 0 not checked. [2025-03-03 14:34:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641673402] [2025-03-03 14:34:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641673402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808628450] [2025-03-03 14:34:11,043 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:11,045 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) [2025-03-03 14:34:11,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:34:11,201 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1059 statements into 126 equivalence classes. [2025-03-03 14:34:11,331 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) and asserted 513 of 1059 statements. [2025-03-03 14:34:11,331 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2025-03-03 14:34:11,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:11,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:34:11,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 34209 proven. 1768 refuted. 0 times theorem prover too weak. 31217 trivial. 0 not checked. [2025-03-03 14:34:11,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 4913 proven. 5212 refuted. 0 times theorem prover too weak. 57069 trivial. 0 not checked. [2025-03-03 14:34:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808628450] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:15,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:15,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 35 [2025-03-03 14:34:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212325972] [2025-03-03 14:34:15,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:15,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 14:34:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:15,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 14:34:15,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:34:15,173 INFO L87 Difference]: Start difference. First operand 86 states and 128 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-03 14:34:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:15,534 INFO L93 Difference]: Finished difference Result 195 states and 353 transitions. [2025-03-03 14:34:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-03 14:34:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) Word has length 1059 [2025-03-03 14:34:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:15,536 INFO L225 Difference]: With dead ends: 195 [2025-03-03 14:34:15,536 INFO L226 Difference]: Without dead ends: 112 [2025-03-03 14:34:15,538 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2169 GetRequests, 2100 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=833, Invalid=2589, Unknown=0, NotChecked=0, Total=3422 [2025-03-03 14:34:15,538 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:15,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 171 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-03 14:34:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2025-03-03 14:34:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 67 states have internal predecessors, (71), 18 states have call successors, (18), 13 states have call predecessors, (18), 10 states have return successors, (53), 17 states have call predecessors, (53), 18 states have call successors, (53) [2025-03-03 14:34:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-03 14:34:15,545 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 1059 [2025-03-03 14:34:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:15,545 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-03 14:34:15,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 26 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (46), 19 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-03 14:34:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-03 14:34:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2025-03-03 14:34:15,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:15,549 INFO L218 NwaCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:15,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 14:34:15,749 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 [2025-03-03 14:34:15,750 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:15,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1402662446, now seen corresponding path program 12 times [2025-03-03 14:34:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627936988] [2025-03-03 14:34:15,750 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:15,764 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 814 statements into 93 equivalence classes. [2025-03-03 14:34:15,783 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 814 statements. [2025-03-03 14:34:15,784 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-03 14:34:15,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1358 proven. 3585 refuted. 0 times theorem prover too weak. 34545 trivial. 0 not checked. [2025-03-03 14:34:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627936988] [2025-03-03 14:34:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627936988] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772967542] [2025-03-03 14:34:15,934 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:15,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:15,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:15,937 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) [2025-03-03 14:34:15,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:34:16,181 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 814 statements into 93 equivalence classes. [2025-03-03 14:34:16,232 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) and asserted 239 of 814 statements. [2025-03-03 14:34:16,232 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2025-03-03 14:34:16,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:16,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:16,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1358 proven. 3585 refuted. 0 times theorem prover too weak. 34545 trivial. 0 not checked. [2025-03-03 14:34:16,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1366 proven. 3654 refuted. 0 times theorem prover too weak. 34468 trivial. 0 not checked. [2025-03-03 14:34:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772967542] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:18,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:18,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2025-03-03 14:34:18,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997254972] [2025-03-03 14:34:18,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:18,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:34:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:18,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:34:18,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:34:18,806 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-03 14:34:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:18,911 INFO L93 Difference]: Finished difference Result 110 states and 170 transitions. [2025-03-03 14:34:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:34:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 814 [2025-03-03 14:34:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:18,913 INFO L225 Difference]: With dead ends: 110 [2025-03-03 14:34:18,913 INFO L226 Difference]: Without dead ends: 106 [2025-03-03 14:34:18,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1618 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:18,914 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:18,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-03 14:34:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2025-03-03 14:34:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 70 states have internal predecessors, (74), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (65), 19 states have call predecessors, (65), 19 states have call successors, (65) [2025-03-03 14:34:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 158 transitions. [2025-03-03 14:34:18,925 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 158 transitions. Word has length 814 [2025-03-03 14:34:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:18,926 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 158 transitions. [2025-03-03 14:34:18,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 21 states have internal predecessors, (65), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-03 14:34:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 158 transitions. [2025-03-03 14:34:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2025-03-03 14:34:18,935 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:18,936 INFO L218 NwaCegarLoop]: trace histogram [225, 225, 182, 112, 112, 112, 112, 112, 112, 112, 70, 43, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:18,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:19,136 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 [2025-03-03 14:34:19,136 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:19,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash -110103902, now seen corresponding path program 13 times [2025-03-03 14:34:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:19,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419758273] [2025-03-03 14:34:19,137 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:19,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1536 statements into 1 equivalence classes. [2025-03-03 14:34:19,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1536 of 1536 statements. [2025-03-03 14:34:19,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:19,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10624 refuted. 0 times theorem prover too weak. 130059 trivial. 0 not checked. [2025-03-03 14:34:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419758273] [2025-03-03 14:34:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419758273] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750828518] [2025-03-03 14:34:20,819 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:20,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:20,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:20,821 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) [2025-03-03 14:34:20,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:34:21,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1536 statements into 1 equivalence classes. [2025-03-03 14:34:21,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1536 of 1536 statements. [2025-03-03 14:34:21,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:21,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:21,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 3429 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:21,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10624 refuted. 0 times theorem prover too weak. 130059 trivial. 0 not checked. [2025-03-03 14:34:21,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 142135 backedges. 1452 proven. 10750 refuted. 0 times theorem prover too weak. 129933 trivial. 0 not checked. [2025-03-03 14:34:26,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750828518] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:26,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:26,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2025-03-03 14:34:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56525473] [2025-03-03 14:34:26,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:26,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:34:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:26,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:34:26,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:34:26,408 INFO L87 Difference]: Start difference. First operand 103 states and 158 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-03-03 14:34:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:26,574 INFO L93 Difference]: Finished difference Result 120 states and 211 transitions. [2025-03-03 14:34:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:34:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1536 [2025-03-03 14:34:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:26,577 INFO L225 Difference]: With dead ends: 120 [2025-03-03 14:34:26,577 INFO L226 Difference]: Without dead ends: 116 [2025-03-03 14:34:26,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3102 GetRequests, 3060 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:34:26,577 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:26,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 123 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:26,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-03 14:34:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2025-03-03 14:34:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 73 states have internal predecessors, (77), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (79), 21 states have call predecessors, (79), 20 states have call successors, (79) [2025-03-03 14:34:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 176 transitions. [2025-03-03 14:34:26,589 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 176 transitions. Word has length 1536 [2025-03-03 14:34:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:26,590 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 176 transitions. [2025-03-03 14:34:26,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2025-03-03 14:34:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 176 transitions. [2025-03-03 14:34:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2408 [2025-03-03 14:34:26,611 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:26,612 INFO L218 NwaCegarLoop]: trace histogram [353, 353, 285, 176, 176, 176, 176, 176, 176, 176, 109, 68, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:26,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:26,812 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 [2025-03-03 14:34:26,812 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:26,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1104519535, now seen corresponding path program 14 times [2025-03-03 14:34:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:26,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550111333] [2025-03-03 14:34:26,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:26,858 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2407 statements into 2 equivalence classes. [2025-03-03 14:34:27,162 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2407 of 2407 statements. [2025-03-03 14:34:27,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:27,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18747 refuted. 0 times theorem prover too weak. 329397 trivial. 0 not checked. [2025-03-03 14:34:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550111333] [2025-03-03 14:34:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550111333] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11529351] [2025-03-03 14:34:31,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:31,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:31,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:31,040 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) [2025-03-03 14:34:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:34:31,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2407 statements into 2 equivalence classes. [2025-03-03 14:34:31,663 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2407 of 2407 statements. [2025-03-03 14:34:31,663 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:31,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:31,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 5363 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:34:31,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18747 refuted. 0 times theorem prover too weak. 329397 trivial. 0 not checked. [2025-03-03 14:34:31,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 350582 backedges. 2438 proven. 18902 refuted. 0 times theorem prover too weak. 329242 trivial. 0 not checked. [2025-03-03 14:34:39,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11529351] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:39,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:39,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2025-03-03 14:34:39,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471949042] [2025-03-03 14:34:39,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:39,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:34:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:39,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:34:39,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:34:39,588 INFO L87 Difference]: Start difference. First operand 108 states and 176 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-03-03 14:34:39,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:39,816 INFO L93 Difference]: Finished difference Result 117 states and 200 transitions. [2025-03-03 14:34:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:34:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2407 [2025-03-03 14:34:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:39,819 INFO L225 Difference]: With dead ends: 117 [2025-03-03 14:34:39,819 INFO L226 Difference]: Without dead ends: 113 [2025-03-03 14:34:39,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4847 GetRequests, 4801 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 14:34:39,821 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 204 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:39,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 114 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-03 14:34:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2025-03-03 14:34:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 21 states have call successors, (21), 13 states have call predecessors, (21), 13 states have return successors, (95), 23 states have call predecessors, (95), 21 states have call successors, (95) [2025-03-03 14:34:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 196 transitions. [2025-03-03 14:34:39,829 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 196 transitions. Word has length 2407 [2025-03-03 14:34:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:39,831 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 196 transitions. [2025-03-03 14:34:39,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2025-03-03 14:34:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 196 transitions. [2025-03-03 14:34:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4696 [2025-03-03 14:34:39,918 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:39,919 INFO L218 NwaCegarLoop]: trace histogram [689, 689, 557, 344, 344, 344, 344, 344, 344, 344, 213, 132, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:39,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 14:34:40,120 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 [2025-03-03 14:34:40,120 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:40,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1406486443, now seen corresponding path program 15 times [2025-03-03 14:34:40,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364840990] [2025-03-03 14:34:40,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:40,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:40,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4695 statements into 584 equivalence classes. [2025-03-03 14:34:40,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 417 of 4695 statements. [2025-03-03 14:34:40,218 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-03-03 14:34:40,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41026 refuted. 0 times theorem prover too weak. 1293033 trivial. 0 not checked. [2025-03-03 14:34:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:40,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364840990] [2025-03-03 14:34:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364840990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:40,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428682305] [2025-03-03 14:34:40,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:40,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:40,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:40,576 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) [2025-03-03 14:34:40,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:34:41,028 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4695 statements into 584 equivalence classes. [2025-03-03 14:34:41,114 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) and asserted 417 of 4695 statements. [2025-03-03 14:34:41,114 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2025-03-03 14:34:41,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:41,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 14:34:41,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41026 refuted. 0 times theorem prover too weak. 1293033 trivial. 0 not checked. [2025-03-03 14:34:41,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1338894 backedges. 4835 proven. 41213 refuted. 0 times theorem prover too weak. 1292846 trivial. 0 not checked. [2025-03-03 14:34:55,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428682305] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:55,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:55,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2025-03-03 14:34:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856713469] [2025-03-03 14:34:55,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:55,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:34:55,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:55,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:34:55,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:55,285 INFO L87 Difference]: Start difference. First operand 113 states and 196 transitions. Second operand has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-03-03 14:34:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:55,603 INFO L93 Difference]: Finished difference Result 122 states and 222 transitions. [2025-03-03 14:34:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) Word has length 4695 [2025-03-03 14:34:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:55,608 INFO L225 Difference]: With dead ends: 122 [2025-03-03 14:34:55,608 INFO L226 Difference]: Without dead ends: 118 [2025-03-03 14:34:55,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9426 GetRequests, 9376 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:34:55,609 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:55,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 134 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-03 14:34:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-03-03 14:34:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 79 states have internal predecessors, (83), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (113), 25 states have call predecessors, (113), 22 states have call successors, (113) [2025-03-03 14:34:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 218 transitions. [2025-03-03 14:34:55,617 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 218 transitions. Word has length 4695 [2025-03-03 14:34:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:55,619 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 218 transitions. [2025-03-03 14:34:55,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.259259259259259) internal successors, (88), 29 states have internal predecessors, (88), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2025-03-03 14:34:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 218 transitions. [2025-03-03 14:34:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10116 [2025-03-03 14:34:56,067 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:56,069 INFO L218 NwaCegarLoop]: trace histogram [1485, 1485, 1201, 742, 742, 742, 742, 742, 742, 742, 459, 284, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:56,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 14:34:56,269 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 [2025-03-03 14:34:56,269 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:56,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1703657899, now seen corresponding path program 16 times [2025-03-03 14:34:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:56,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017235291] [2025-03-03 14:34:56,272 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:56,392 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 10115 statements into 2 equivalence classes. [2025-03-03 14:35:00,359 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 8627 of 10115 statements. [2025-03-03 14:35:00,359 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:00,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat