./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.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_2calls_5-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:34:32,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:34:32,909 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:34:32,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:34:32,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:34:32,925 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:34:32,926 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:34:32,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:34:32,927 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:34:32,927 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:34:32,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:34:32,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:34:32,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:34:32,927 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:34:32,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:34:32,928 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:34:32,929 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:34:32,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:34:32,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:34:32,929 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 -> 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 [2025-03-03 14:34:33,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:34:33,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:34:33,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:34:33,139 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:34:33,139 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:34:33,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2025-03-03 14:34:34,259 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57d2041a/4c5c0911c7e14d0b81bd4a39c893d16d/FLAG8027618e1 [2025-03-03 14:34:34,516 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:34:34,517 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2025-03-03 14:34:34,524 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57d2041a/4c5c0911c7e14d0b81bd4a39c893d16d/FLAG8027618e1 [2025-03-03 14:34:34,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57d2041a/4c5c0911c7e14d0b81bd4a39c893d16d [2025-03-03 14:34:34,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:34:34,840 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:34:34,840 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:34:34,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:34:34,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:34:34,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:34,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c49f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34, skipping insertion in model container [2025-03-03 14:34:34,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:34,853 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:34:34,951 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2025-03-03 14:34:34,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:34:34,963 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:34:34,972 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2025-03-03 14:34:34,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:34:34,983 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:34:34,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34 WrapperNode [2025-03-03 14:34:34,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:34:34,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:34:34,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:34:34,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:34:34,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:34,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,007 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:34:35,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:34:35,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:34:35,009 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:34:35,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:34:35,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,016 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,026 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 14:34:35,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,027 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,028 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,033 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,034 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:34:35,035 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:34:35,035 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:34:35,035 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:34:35,035 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (1/1) ... [2025-03-03 14:34:35,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:34:35,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:35,066 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 14:34:35,069 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 14:34:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:34:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:34:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-03 14:34:35,094 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-03 14:34:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-03 14:34:35,094 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-03 14:34:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:34:35,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:34:35,132 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:34:35,134 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:34:35,211 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-03 14:34:35,232 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:34:35,239 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 14:34:35,241 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:34:35,249 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:34:35,249 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:34:35,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:35 BoogieIcfgContainer [2025-03-03 14:34:35,249 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:34:35,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:34:35,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:34:35,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:34:35,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:34:34" (1/3) ... [2025-03-03 14:34:35,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2b4d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:34:35, skipping insertion in model container [2025-03-03 14:34:35,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:34" (2/3) ... [2025-03-03 14:34:35,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2b4d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:34:35, skipping insertion in model container [2025-03-03 14:34:35,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:35" (3/3) ... [2025-03-03 14:34:35,258 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2025-03-03 14:34:35,268 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:34:35,270 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_5-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:34:35,312 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:34:35,320 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;@70566cac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:34:35,321 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:34:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:34:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:34:35,328 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:35,328 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:35,329 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:35,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-03 14:34:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:35,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145084149] [2025-03-03 14:34:35,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:35,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:34:35,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:34:35,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:35,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:35,506 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 14:34:35,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145084149] [2025-03-03 14:34:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145084149] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:34:35,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:34:35,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:34:35,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519956506] [2025-03-03 14:34:35,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:34:35,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:34:35,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:35,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:34:35,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:35,528 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:34:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:35,610 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-03-03 14:34:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:34:35,612 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 14:34:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:35,616 INFO L225 Difference]: With dead ends: 41 [2025-03-03 14:34:35,616 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:34:35,619 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 14:34:35,621 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:35,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:34:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:34:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:34:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:34:35,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-03 14:34:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:35,650 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:34:35,650 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 14:34:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:34:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:34:35,653 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:35,653 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:35,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:34:35,653 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:35,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-03 14:34:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:35,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119550512] [2025-03-03 14:34:35,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:35,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:34:35,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:34:35,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:35,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:35,715 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 14:34:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:35,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119550512] [2025-03-03 14:34:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119550512] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:34:35,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:34:35,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:34:35,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409859229] [2025-03-03 14:34:35,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:34:35,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:34:35,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:35,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:34:35,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:35,717 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:34:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:35,764 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 14:34:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:34:35,765 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 14:34:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:35,765 INFO L225 Difference]: With dead ends: 33 [2025-03-03 14:34:35,765 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:34:35,766 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 14:34:35,766 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:35,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:34:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:34:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:34:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:34:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:34:35,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-03 14:34:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:35,773 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:34:35,773 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 14:34:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:34:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:34:35,774 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:35,775 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:35,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:34:35,775 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:35,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-03 14:34:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72672932] [2025-03-03 14:34:35,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:35,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:34:35,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:34:35,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:35,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:35,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:35,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72672932] [2025-03-03 14:34:35,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72672932] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:35,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383719228] [2025-03-03 14:34:35,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:35,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:35,879 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 14:34:35,881 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 14:34:35,905 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:34:35,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:34:35,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:35,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:35,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:35,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:35,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:36,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383719228] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:36,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:36,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 14:34:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294132482] [2025-03-03 14:34:36,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:36,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:34:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:36,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:34:36,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:34:36,190 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:34:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:36,300 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-03 14:34:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-03 14:34:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:36,301 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:34:36,301 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:34:36,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:36,302 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:36,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:34:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-03 14:34:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-03 14:34:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-03 14:34:36,308 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-03 14:34:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:36,308 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-03 14:34:36,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:34:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-03 14:34:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:34:36,308 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:36,309 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:36,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:34:36,509 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 14:34:36,509 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:36,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-03 14:34:36,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:36,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064242830] [2025-03-03 14:34:36,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:36,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:36,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:34:36,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:34:36,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:36,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064242830] [2025-03-03 14:34:36,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064242830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393030499] [2025-03-03 14:34:36,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:36,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:36,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:36,591 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 14:34:36,591 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 14:34:36,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:34:36,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:34:36,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:36,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:36,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:36,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:36,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393030499] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:36,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-03 14:34:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915218259] [2025-03-03 14:34:36,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:36,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:34:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:36,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:34:36,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:34:36,757 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:34:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:36,842 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 14:34:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:34:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-03 14:34:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:36,843 INFO L225 Difference]: With dead ends: 40 [2025-03-03 14:34:36,843 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 14:34:36,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:34:36,844 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:36,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 14:34:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-03 14:34:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-03 14:34:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-03 14:34:36,849 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-03 14:34:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:36,849 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-03 14:34:36,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:34:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-03 14:34:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 14:34:36,850 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:36,850 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:36,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:34:37,054 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 14:34:37,054 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:37,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-03 14:34:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:37,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358529891] [2025-03-03 14:34:37,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:37,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:37,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:34:37,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:34:37,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:37,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:34:37,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:37,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358529891] [2025-03-03 14:34:37,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358529891] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:37,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207852684] [2025-03-03 14:34:37,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:37,116 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 14:34:37,118 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 14:34:37,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:34:37,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:34:37,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:37,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:37,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:37,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:34:37,223 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:34:37,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207852684] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:37,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:37,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-03 14:34:37,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677246474] [2025-03-03 14:34:37,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:37,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:34:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:37,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:34:37,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:37,506 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:34:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:37,649 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-03 14:34:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:34:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-03-03 14:34:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:37,650 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:34:37,650 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:34:37,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:34:37,651 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:37,651 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:34:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 14:34:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 14:34:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-03 14:34:37,662 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-03 14:34:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:37,662 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-03 14:34:37,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:34:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-03 14:34:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:34:37,663 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:37,663 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:37,670 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 14:34:37,863 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 14:34:37,864 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:37,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-03 14:34:37,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:37,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864118201] [2025-03-03 14:34:37,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:37,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:37,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:34:37,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:34:37,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:37,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 14:34:37,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:37,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864118201] [2025-03-03 14:34:37,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864118201] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:37,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366216285] [2025-03-03 14:34:37,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:37,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:37,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:37,977 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 14:34:37,978 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 14:34:38,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:34:38,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:34:38,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:38,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:38,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:38,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:34:38,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:34:38,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366216285] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:38,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:38,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-03 14:34:38,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624932457] [2025-03-03 14:34:38,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:38,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:38,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:38,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:38,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:38,338 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:34:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:38,650 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-03 14:34:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:38,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-03-03 14:34:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:38,652 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:34:38,652 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:34:38,653 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:34:38,653 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:38,653 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:34:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-03 14:34:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-03 14:34:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-03 14:34:38,669 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-03 14:34:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:38,669 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-03 14:34:38,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:34:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-03 14:34:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 14:34:38,671 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:38,671 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:38,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:38,871 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 14:34:38,871 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:38,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-03 14:34:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138064107] [2025-03-03 14:34:38,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:38,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:34:38,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:34:38,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:38,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:34:38,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:38,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138064107] [2025-03-03 14:34:38,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138064107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:38,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017966959] [2025-03-03 14:34:38,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:38,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:38,976 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 14:34:38,978 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 14:34:39,000 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:34:39,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:34:39,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:39,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:39,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:39,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-03 14:34:39,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:34:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017966959] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:39,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:39,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2025-03-03 14:34:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755791250] [2025-03-03 14:34:39,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:39,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 14:34:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:39,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 14:34:39,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:34:39,450 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 11 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-03 14:34:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:39,590 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-03 14:34:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 11 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) Word has length 51 [2025-03-03 14:34:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:39,592 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:34:39,592 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 14:34:39,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:34:39,593 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:39,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 109 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 14:34:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-03 14:34:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-03 14:34:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:34:39,616 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-03 14:34:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:39,618 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:34:39,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 11 states have call successors, (13), 1 states have call predecessors, (13), 8 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-03 14:34:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:34:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:34:39,621 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:39,621 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:39,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 14:34:39,821 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 14:34:39,822 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:39,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:39,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-03 14:34:39,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:39,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206275588] [2025-03-03 14:34:39,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:39,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:39,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:34:39,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:39,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:39,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2025-03-03 14:34:39,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206275588] [2025-03-03 14:34:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206275588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:39,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535615404] [2025-03-03 14:34:39,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:39,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:39,946 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 14:34:39,947 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 14:34:39,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:34:39,996 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:39,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:39,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:39,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:40,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2025-03-03 14:34:40,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 60 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-03 14:34:40,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535615404] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:40,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:40,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-03 14:34:40,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189094032] [2025-03-03 14:34:40,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:40,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:34:40,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:40,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:34:40,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:34:40,344 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 7 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-03 14:34:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:40,446 INFO L93 Difference]: Finished difference Result 89 states and 165 transitions. [2025-03-03 14:34:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 7 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 107 [2025-03-03 14:34:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:40,447 INFO L225 Difference]: With dead ends: 89 [2025-03-03 14:34:40,447 INFO L226 Difference]: Without dead ends: 85 [2025-03-03 14:34:40,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-03 14:34:40,448 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:40,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 121 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:40,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-03 14:34:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2025-03-03 14:34:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-03 14:34:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:34:40,461 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 107 [2025-03-03 14:34:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:40,462 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:34:40,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 7 states have call successors, (12), 1 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-03 14:34:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:34:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-03 14:34:40,464 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:40,464 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:40,470 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 14:34:40,664 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 14:34:40,665 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:40,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1065687029, now seen corresponding path program 1 times [2025-03-03 14:34:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351667488] [2025-03-03 14:34:40,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:40,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-03-03 14:34:40,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-03-03 14:34:40,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:40,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 14:34:41,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:41,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351667488] [2025-03-03 14:34:41,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351667488] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:41,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372858430] [2025-03-03 14:34:41,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:41,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:41,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:41,120 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 14:34:41,122 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 14:34:41,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 106 statements into 1 equivalence classes. [2025-03-03 14:34:41,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 106 of 106 statements. [2025-03-03 14:34:41,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:41,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:41,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-03 14:34:41,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 14:34:41,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 14:34:41,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372858430] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:41,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:41,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2025-03-03 14:34:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14233490] [2025-03-03 14:34:41,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:41,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:34:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:41,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:34:41,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:41,659 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2025-03-03 14:34:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:41,867 INFO L93 Difference]: Finished difference Result 132 states and 289 transitions. [2025-03-03 14:34:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 14:34:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2025-03-03 14:34:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:41,869 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:34:41,869 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 14:34:41,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2025-03-03 14:34:41,870 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:41,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1043 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 14:34:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 90. [2025-03-03 14:34:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 16 states have call successors, (16), 3 states have call predecessors, (16), 17 states have return successors, (104), 26 states have call predecessors, (104), 16 states have call successors, (104) [2025-03-03 14:34:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2025-03-03 14:34:41,894 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 106 [2025-03-03 14:34:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:41,894 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2025-03-03 14:34:41,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2025-03-03 14:34:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2025-03-03 14:34:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2025-03-03 14:34:41,896 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:41,896 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:41,902 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 14:34:42,097 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 14:34:42,097 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:42,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1736727113, now seen corresponding path program 2 times [2025-03-03 14:34:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:42,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069503856] [2025-03-03 14:34:42,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:42,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:42,105 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 162 statements into 2 equivalence classes. [2025-03-03 14:34:42,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 162 of 162 statements. [2025-03-03 14:34:42,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:42,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 129 proven. 41 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2025-03-03 14:34:42,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:42,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069503856] [2025-03-03 14:34:42,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069503856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638007651] [2025-03-03 14:34:42,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:42,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:42,295 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 14:34:42,297 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 14:34:42,334 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 162 statements into 2 equivalence classes. [2025-03-03 14:34:42,365 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 162 of 162 statements. [2025-03-03 14:34:42,365 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:42,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:42,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:42,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 86 proven. 161 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2025-03-03 14:34:42,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 86 proven. 169 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2025-03-03 14:34:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638007651] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:43,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 20 [2025-03-03 14:34:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840728304] [2025-03-03 14:34:43,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:43,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:34:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:43,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:34:43,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:43,182 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2025-03-03 14:34:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:43,365 INFO L93 Difference]: Finished difference Result 142 states and 370 transitions. [2025-03-03 14:34:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) Word has length 162 [2025-03-03 14:34:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:43,368 INFO L225 Difference]: With dead ends: 142 [2025-03-03 14:34:43,368 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 14:34:43,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 309 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:43,370 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:43,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 326 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 14:34:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2025-03-03 14:34:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.103448275862069) internal successors, (64), 62 states have internal predecessors, (64), 16 states have call successors, (16), 3 states have call predecessors, (16), 18 states have return successors, (68), 27 states have call predecessors, (68), 16 states have call successors, (68) [2025-03-03 14:34:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 148 transitions. [2025-03-03 14:34:43,380 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 148 transitions. Word has length 162 [2025-03-03 14:34:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:43,380 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 148 transitions. [2025-03-03 14:34:43,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2025-03-03 14:34:43,380 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 148 transitions. [2025-03-03 14:34:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:34:43,382 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:43,382 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:43,388 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 14:34:43,582 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 14:34:43,583 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:43,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1594858244, now seen corresponding path program 2 times [2025-03-03 14:34:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:43,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345958298] [2025-03-03 14:34:43,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:43,587 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 107 statements into 2 equivalence classes. [2025-03-03 14:34:43,593 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:43,594 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:43,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-03 14:34:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:43,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345958298] [2025-03-03 14:34:43,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345958298] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:43,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335017931] [2025-03-03 14:34:43,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:43,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:43,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:43,675 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 14:34:43,677 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 14:34:43,711 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 107 statements into 2 equivalence classes. [2025-03-03 14:34:43,730 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:43,730 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:43,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:43,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:43,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 18 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-03 14:34:43,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 96 proven. 24 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-03 14:34:44,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335017931] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:44,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2025-03-03 14:34:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994171713] [2025-03-03 14:34:44,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:44,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 14:34:44,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:44,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 14:34:44,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-03 14:34:44,153 INFO L87 Difference]: Start difference. First operand 93 states and 148 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 8 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-03-03 14:34:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:44,269 INFO L93 Difference]: Finished difference Result 114 states and 174 transitions. [2025-03-03 14:34:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:34:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 8 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 107 [2025-03-03 14:34:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:44,271 INFO L225 Difference]: With dead ends: 114 [2025-03-03 14:34:44,271 INFO L226 Difference]: Without dead ends: 110 [2025-03-03 14:34:44,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 207 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:34:44,272 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:44,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 225 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-03 14:34:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2025-03-03 14:34:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 57 states have internal predecessors, (59), 15 states have call successors, (15), 3 states have call predecessors, (15), 16 states have return successors, (57), 24 states have call predecessors, (57), 15 states have call successors, (57) [2025-03-03 14:34:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 131 transitions. [2025-03-03 14:34:44,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 131 transitions. Word has length 107 [2025-03-03 14:34:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:44,284 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 131 transitions. [2025-03-03 14:34:44,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 8 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-03-03 14:34:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 131 transitions. [2025-03-03 14:34:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-03 14:34:44,285 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:44,285 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:44,292 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 14:34:44,490 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 14:34:44,490 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:44,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash -50932017, now seen corresponding path program 3 times [2025-03-03 14:34:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:44,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449129571] [2025-03-03 14:34:44,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:44,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:44,494 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 94 statements into 6 equivalence classes. [2025-03-03 14:34:44,497 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 94 statements. [2025-03-03 14:34:44,497 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 14:34:44,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 14:34:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:44,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449129571] [2025-03-03 14:34:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449129571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:44,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616295261] [2025-03-03 14:34:44,543 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:44,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:44,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:44,545 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 14:34:44,547 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 14:34:44,583 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 94 statements into 6 equivalence classes. [2025-03-03 14:34:44,604 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 32 of 94 statements. [2025-03-03 14:34:44,604 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 14:34:44,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:44,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:44,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 14:34:44,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 64 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 14:34:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616295261] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:44,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:44,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2025-03-03 14:34:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955352663] [2025-03-03 14:34:44,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:44,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 14:34:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:44,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 14:34:44,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:34:44,796 INFO L87 Difference]: Start difference. First operand 85 states and 131 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 14:34:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:44,858 INFO L93 Difference]: Finished difference Result 164 states and 268 transitions. [2025-03-03 14:34:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2025-03-03 14:34:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:44,860 INFO L225 Difference]: With dead ends: 164 [2025-03-03 14:34:44,860 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 14:34:44,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:44,861 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:44,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:34:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 14:34:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2025-03-03 14:34:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 52 states have internal predecessors, (53), 13 states have call successors, (13), 3 states have call predecessors, (13), 15 states have return successors, (52), 22 states have call predecessors, (52), 13 states have call successors, (52) [2025-03-03 14:34:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 118 transitions. [2025-03-03 14:34:44,872 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 118 transitions. Word has length 94 [2025-03-03 14:34:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:44,872 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 118 transitions. [2025-03-03 14:34:44,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 14:34:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 118 transitions. [2025-03-03 14:34:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:34:44,873 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:44,873 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:44,878 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 14:34:45,077 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 14:34:45,077 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:45,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1536383450, now seen corresponding path program 3 times [2025-03-03 14:34:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:45,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355861574] [2025-03-03 14:34:45,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:45,081 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 107 statements into 6 equivalence classes. [2025-03-03 14:34:45,088 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 100 of 107 statements. [2025-03-03 14:34:45,088 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 14:34:45,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 14:34:45,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:45,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355861574] [2025-03-03 14:34:45,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355861574] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:45,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453303360] [2025-03-03 14:34:45,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:45,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:45,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:45,131 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 14:34:45,133 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 14:34:45,169 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 107 statements into 6 equivalence classes. [2025-03-03 14:34:45,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 100 of 107 statements. [2025-03-03 14:34:45,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 14:34:45,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:45,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:45,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 168 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-03 14:34:45,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2025-03-03 14:34:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453303360] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:45,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-03 14:34:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814762389] [2025-03-03 14:34:45,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:45,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 14:34:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:45,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 14:34:45,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:34:45,406 INFO L87 Difference]: Start difference. First operand 78 states and 118 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-03 14:34:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:45,473 INFO L93 Difference]: Finished difference Result 143 states and 224 transitions. [2025-03-03 14:34:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 107 [2025-03-03 14:34:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:45,475 INFO L225 Difference]: With dead ends: 143 [2025-03-03 14:34:45,475 INFO L226 Difference]: Without dead ends: 67 [2025-03-03 14:34:45,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:45,476 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:45,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 153 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:34:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-03 14:34:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2025-03-03 14:34:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 12 states have return successors, (31), 17 states have call predecessors, (31), 11 states have call successors, (31) [2025-03-03 14:34:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2025-03-03 14:34:45,482 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 107 [2025-03-03 14:34:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:45,483 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2025-03-03 14:34:45,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-03 14:34:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2025-03-03 14:34:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-03 14:34:45,484 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:45,484 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:45,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:45,685 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 14:34:45,685 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:45,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1279291694, now seen corresponding path program 4 times [2025-03-03 14:34:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:45,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888996667] [2025-03-03 14:34:45,685 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:45,690 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 133 statements into 2 equivalence classes. [2025-03-03 14:34:45,693 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 113 of 133 statements. [2025-03-03 14:34:45,693 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:45,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 62 proven. 103 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2025-03-03 14:34:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888996667] [2025-03-03 14:34:45,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888996667] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185071307] [2025-03-03 14:34:45,785 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:45,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:45,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:45,787 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 14:34:45,788 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 14:34:45,826 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 133 statements into 2 equivalence classes. [2025-03-03 14:34:45,843 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 113 of 133 statements. [2025-03-03 14:34:45,843 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:45,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:45,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:45,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 70 proven. 121 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2025-03-03 14:34:45,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 72 proven. 127 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2025-03-03 14:34:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185071307] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:46,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:46,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 18 [2025-03-03 14:34:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327779062] [2025-03-03 14:34:46,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:46,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:46,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:46,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:46,540 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 states have internal predecessors, (63), 13 states have call successors, (20), 1 states have call predecessors, (20), 6 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2025-03-03 14:34:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:46,680 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2025-03-03 14:34:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:34:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 states have internal predecessors, (63), 13 states have call successors, (20), 1 states have call predecessors, (20), 6 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) Word has length 133 [2025-03-03 14:34:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:46,681 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:34:46,681 INFO L226 Difference]: Without dead ends: 69 [2025-03-03 14:34:46,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:46,682 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:46,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 274 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-03-03 14:34:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2025-03-03 14:34:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 11 states have call successors, (11), 5 states have call predecessors, (11), 12 states have return successors, (25), 17 states have call predecessors, (25), 11 states have call successors, (25) [2025-03-03 14:34:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2025-03-03 14:34:46,687 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 133 [2025-03-03 14:34:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:46,687 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2025-03-03 14:34:46,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 states have internal predecessors, (63), 13 states have call successors, (20), 1 states have call predecessors, (20), 6 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2025-03-03 14:34:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2025-03-03 14:34:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-03 14:34:46,688 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:46,689 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:46,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:46,889 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 14:34:46,889 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:46,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1084789312, now seen corresponding path program 1 times [2025-03-03 14:34:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189164879] [2025-03-03 14:34:46,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:46,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:46,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 14:34:46,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 14:34:46,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:46,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 46 proven. 118 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2025-03-03 14:34:47,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189164879] [2025-03-03 14:34:47,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189164879] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:47,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025538802] [2025-03-03 14:34:47,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:47,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:47,011 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 14:34:47,013 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 14:34:47,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 14:34:47,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 14:34:47,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:47,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:47,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:47,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2025-03-03 14:34:47,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 147 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2025-03-03 14:34:47,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025538802] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:47,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:47,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-03-03 14:34:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268042465] [2025-03-03 14:34:47,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:47,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:34:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:47,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:34:47,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:47,986 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 15 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 8 states have call predecessors, (22), 15 states have call successors, (22) [2025-03-03 14:34:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:48,125 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2025-03-03 14:34:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:48,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 15 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 8 states have call predecessors, (22), 15 states have call successors, (22) Word has length 120 [2025-03-03 14:34:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:48,126 INFO L225 Difference]: With dead ends: 91 [2025-03-03 14:34:48,126 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 14:34:48,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 228 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:48,127 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:48,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 231 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 14:34:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 14:34:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 14:34:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 14:34:48,128 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2025-03-03 14:34:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:48,128 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 14:34:48,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 15 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 8 states have call predecessors, (22), 15 states have call successors, (22) [2025-03-03 14:34:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 14:34:48,128 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 14:34:48,133 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 14:34:48,139 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 14:34:48,334 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 14:34:48,336 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:48,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-03 14:34:53,332 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-03 14:34:53,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 02:34:53 BoogieIcfgContainer [2025-03-03 14:34:53,335 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-03 14:34:53,336 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-03 14:34:53,336 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-03 14:34:53,336 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-03 14:34:53,336 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:35" (3/4) ... [2025-03-03 14:34:53,338 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-03 14:34:53,341 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo2 [2025-03-03 14:34:53,341 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo1 [2025-03-03 14:34:53,343 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-03-03 14:34:53,343 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-03 14:34:53,343 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-03 14:34:53,343 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-03 14:34:53,386 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-03 14:34:53,387 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-03 14:34:53,387 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-03 14:34:53,387 INFO L158 Benchmark]: Toolchain (without parser) took 18547.48ms. Allocated memory was 142.6MB in the beginning and 822.1MB in the end (delta: 679.5MB). Free memory was 104.8MB in the beginning and 413.0MB in the end (delta: -308.2MB). Peak memory consumption was 372.0MB. Max. memory is 16.1GB. [2025-03-03 14:34:53,387 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 125.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 14:34:53,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.06ms. Allocated memory is still 142.6MB. Free memory was 104.8MB in the beginning and 93.5MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:34:53,387 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.22ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 93.0MB in the end (delta: 511.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 14:34:53,388 INFO L158 Benchmark]: Boogie Preprocessor took 25.10ms. Allocated memory is still 142.6MB. Free memory was 93.0MB in the beginning and 91.8MB in the end (delta: 1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:34:53,388 INFO L158 Benchmark]: IcfgBuilder took 214.68ms. Allocated memory is still 142.6MB. Free memory was 91.8MB in the beginning and 81.2MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:34:53,388 INFO L158 Benchmark]: TraceAbstraction took 18084.15ms. Allocated memory was 142.6MB in the beginning and 822.1MB in the end (delta: 679.5MB). Free memory was 80.1MB in the beginning and 421.2MB in the end (delta: -341.2MB). Peak memory consumption was 463.4MB. Max. memory is 16.1GB. [2025-03-03 14:34:53,388 INFO L158 Benchmark]: Witness Printer took 50.80ms. Allocated memory is still 822.1MB. Free memory was 421.2MB in the beginning and 413.0MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:34:53,390 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 125.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.06ms. Allocated memory is still 142.6MB. Free memory was 104.8MB in the beginning and 93.5MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.22ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 93.0MB in the end (delta: 511.0kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.10ms. Allocated memory is still 142.6MB. Free memory was 93.0MB in the beginning and 91.8MB in the end (delta: 1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 214.68ms. Allocated memory is still 142.6MB. Free memory was 91.8MB in the beginning and 81.2MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 18084.15ms. Allocated memory was 142.6MB in the beginning and 822.1MB in the end (delta: 679.5MB). Free memory was 80.1MB in the beginning and 421.2MB in the end (delta: -341.2MB). Peak memory consumption was 463.4MB. Max. memory is 16.1GB. * Witness Printer took 50.80ms. Allocated memory is still 822.1MB. Free memory was 421.2MB in the beginning and 413.0MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.0s, OverallIterations: 15, TraceHistogramMax: 13, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 338 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 269 mSDsluCounter, 3477 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3023 mSDsCounter, 213 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2569 IncrementalHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 213 mSolverCounterUnsat, 454 mSDtfsCounter, 2569 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2408 GetRequests, 2126 SyntacticMatches, 49 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=10, InterpolantAutomatonStates: 166, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 152 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 2235 NumberOfCodeBlocks, 2057 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 3301 ConstructedInterpolants, 0 QuantifiedInterpolants, 5865 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2469 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 6650/8502 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-03 14:34:53,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE