./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann03.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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:42:05,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:42:05,920 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:42:05,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:42:05,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:42:05,944 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:42:05,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:42:05,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:42:05,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:42:05,945 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:42:05,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:42:05,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:42:05,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:42:05,946 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:42:05,947 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:42:05,947 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:42:05,947 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:42:05,948 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:42:05,949 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:42:05,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:05,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:42:05,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:42:05,950 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 -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2025-03-08 05:42:06,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:42:06,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:42:06,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:42:06,187 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:42:06,187 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:42:06,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2025-03-08 05:42:07,273 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d677b1d26/9efc256c2af949e4941c4168958d3e64/FLAG77a3ac7f1 [2025-03-08 05:42:07,501 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:42:07,503 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2025-03-08 05:42:07,527 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d677b1d26/9efc256c2af949e4941c4168958d3e64/FLAG77a3ac7f1 [2025-03-08 05:42:07,857 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d677b1d26/9efc256c2af949e4941c4168958d3e64 [2025-03-08 05:42:07,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:42:07,860 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:42:07,861 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:07,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:42:07,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:42:07,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:07" (1/1) ... [2025-03-08 05:42:07,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bafad9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:07, skipping insertion in model container [2025-03-08 05:42:07,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:07" (1/1) ... [2025-03-08 05:42:07,879 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:42:07,986 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/Ackermann03.c[1168,1181] [2025-03-08 05:42:07,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:07,995 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:42:08,006 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/Ackermann03.c[1168,1181] [2025-03-08 05:42:08,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:08,021 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:42:08,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08 WrapperNode [2025-03-08 05:42:08,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:08,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:08,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:42:08,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:42:08,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,048 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2025-03-08 05:42:08,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:08,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:42:08,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:42:08,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:42:08,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,056 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,065 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 05:42:08,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,068 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:42:08,077 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:42:08,078 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:42:08,078 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:42:08,079 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (1/1) ... [2025-03-08 05:42:08,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:08,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:08,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:42:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:42:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:42:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:42:08,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:42:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-03-08 05:42:08,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-03-08 05:42:08,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:42:08,174 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:42:08,176 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:42:08,274 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: havoc #t~ret5;havoc #t~ret6; [2025-03-08 05:42:08,277 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L21: havoc #t~ret4; [2025-03-08 05:42:08,286 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-03-08 05:42:08,287 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:42:08,296 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:42:08,296 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:42:08,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:08 BoogieIcfgContainer [2025-03-08 05:42:08,297 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:42:08,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:42:08,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:42:08,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:42:08,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:42:07" (1/3) ... [2025-03-08 05:42:08,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f88b442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:08, skipping insertion in model container [2025-03-08 05:42:08,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:08" (2/3) ... [2025-03-08 05:42:08,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f88b442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:08, skipping insertion in model container [2025-03-08 05:42:08,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:08" (3/3) ... [2025-03-08 05:42:08,306 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2025-03-08 05:42:08,318 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:42:08,320 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann03.c that has 2 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:42:08,364 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:42:08,373 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;@23f31fda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:42:08,375 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:42:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 05:42:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 05:42:08,384 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:08,385 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:08,385 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:08,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:08,390 INFO L85 PathProgramCache]: Analyzing trace with hash -640999361, now seen corresponding path program 1 times [2025-03-08 05:42:08,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:08,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93460228] [2025-03-08 05:42:08,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:08,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 05:42:08,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 05:42:08,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:08,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:42:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:08,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93460228] [2025-03-08 05:42:08,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93460228] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:08,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:08,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:08,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321511081] [2025-03-08 05:42:08,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:08,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:08,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:08,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:08,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:08,605 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:08,723 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2025-03-08 05:42:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:42:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-03-08 05:42:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:08,729 INFO L225 Difference]: With dead ends: 37 [2025-03-08 05:42:08,730 INFO L226 Difference]: Without dead ends: 27 [2025-03-08 05:42:08,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:42:08,733 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:08,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-08 05:42:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2025-03-08 05:42:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-08 05:42:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2025-03-08 05:42:08,766 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 12 [2025-03-08 05:42:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:08,766 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2025-03-08 05:42:08,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2025-03-08 05:42:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 05:42:08,767 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:08,767 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:08,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:42:08,769 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:08,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1861650847, now seen corresponding path program 1 times [2025-03-08 05:42:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104422840] [2025-03-08 05:42:08,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:08,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:08,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 05:42:08,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 05:42:08,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:08,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:42:08,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104422840] [2025-03-08 05:42:08,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104422840] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333001035] [2025-03-08 05:42:08,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:08,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:08,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:08,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:42:08,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 05:42:08,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 05:42:08,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:08,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:08,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 05:42:08,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:42:08,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:42:09,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333001035] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:09,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:09,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-08 05:42:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803096558] [2025-03-08 05:42:09,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:09,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:42:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:09,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:42:09,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:42:09,035 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 05:42:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:09,151 INFO L93 Difference]: Finished difference Result 69 states and 124 transitions. [2025-03-08 05:42:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:42:09,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2025-03-08 05:42:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:09,155 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:42:09,155 INFO L226 Difference]: Without dead ends: 45 [2025-03-08 05:42:09,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:42:09,157 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:09,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:09,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-08 05:42:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2025-03-08 05:42:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2025-03-08 05:42:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2025-03-08 05:42:09,174 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 19 [2025-03-08 05:42:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:09,174 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2025-03-08 05:42:09,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 05:42:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2025-03-08 05:42:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 05:42:09,176 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:09,176 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:09,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:42:09,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:09,377 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:09,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1457087151, now seen corresponding path program 1 times [2025-03-08 05:42:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:09,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395132227] [2025-03-08 05:42:09,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:09,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 05:42:09,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 05:42:09,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:09,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-08 05:42:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395132227] [2025-03-08 05:42:09,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395132227] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922642835] [2025-03-08 05:42:09,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:09,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:09,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:09,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:09,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:42:09,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 05:42:09,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 05:42:09,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:09,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:09,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:42:09,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-08 05:42:09,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-08 05:42:10,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922642835] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:10,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:10,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2025-03-08 05:42:10,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100452641] [2025-03-08 05:42:10,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:10,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:42:10,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:10,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:42:10,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:42:10,141 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-08 05:42:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:10,242 INFO L93 Difference]: Finished difference Result 62 states and 124 transitions. [2025-03-08 05:42:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:42:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2025-03-08 05:42:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:10,245 INFO L225 Difference]: With dead ends: 62 [2025-03-08 05:42:10,245 INFO L226 Difference]: Without dead ends: 58 [2025-03-08 05:42:10,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:42:10,246 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:10,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 68 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-08 05:42:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-03-08 05:42:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (60), 15 states have call predecessors, (60), 10 states have call successors, (60) [2025-03-08 05:42:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2025-03-08 05:42:10,257 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 45 [2025-03-08 05:42:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:10,257 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2025-03-08 05:42:10,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-08 05:42:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2025-03-08 05:42:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2025-03-08 05:42:10,261 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:10,261 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:10,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:10,461 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,SelfDestructingSolverStorable2 [2025-03-08 05:42:10,461 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:10,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1906797306, now seen corresponding path program 2 times [2025-03-08 05:42:10,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:10,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064649187] [2025-03-08 05:42:10,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:10,489 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 119 statements into 2 equivalence classes. [2025-03-08 05:42:10,517 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 119 of 119 statements. [2025-03-08 05:42:10,517 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:10,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 157 proven. 146 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-03-08 05:42:10,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:10,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064649187] [2025-03-08 05:42:10,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064649187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:10,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983771275] [2025-03-08 05:42:10,709 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:10,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:10,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:10,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:42:10,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 119 statements into 2 equivalence classes. [2025-03-08 05:42:10,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 119 of 119 statements. [2025-03-08 05:42:10,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:10,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:10,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 05:42:10,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-03-08 05:42:10,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2025-03-08 05:42:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983771275] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:12,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:12,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 15] total 30 [2025-03-08 05:42:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314232653] [2025-03-08 05:42:12,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:12,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 05:42:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:12,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 05:42:12,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:42:12,415 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 24 states have internal predecessors, (73), 10 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (31), 18 states have call predecessors, (31), 10 states have call successors, (31) [2025-03-08 05:42:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:13,641 INFO L93 Difference]: Finished difference Result 348 states and 2271 transitions. [2025-03-08 05:42:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-08 05:42:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 24 states have internal predecessors, (73), 10 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (31), 18 states have call predecessors, (31), 10 states have call successors, (31) Word has length 119 [2025-03-08 05:42:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:13,644 INFO L225 Difference]: With dead ends: 348 [2025-03-08 05:42:13,644 INFO L226 Difference]: Without dead ends: 51 [2025-03-08 05:42:13,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1009, Invalid=4691, Unknown=0, NotChecked=0, Total=5700 [2025-03-08 05:42:13,662 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:13,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 292 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 05:42:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-08 05:42:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2025-03-08 05:42:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 8 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2025-03-08 05:42:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2025-03-08 05:42:13,677 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 119 [2025-03-08 05:42:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:13,679 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2025-03-08 05:42:13,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 24 states have internal predecessors, (73), 10 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (31), 18 states have call predecessors, (31), 10 states have call successors, (31) [2025-03-08 05:42:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2025-03-08 05:42:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-08 05:42:13,684 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:13,684 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:13,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:13,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:13,885 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:13,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:13,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2014828494, now seen corresponding path program 3 times [2025-03-08 05:42:13,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:13,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581755779] [2025-03-08 05:42:13,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:13,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:13,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 13 equivalence classes. [2025-03-08 05:42:13,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 72 of 105 statements. [2025-03-08 05:42:13,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-08 05:42:13,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 192 proven. 78 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2025-03-08 05:42:14,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581755779] [2025-03-08 05:42:14,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581755779] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889526469] [2025-03-08 05:42:14,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:14,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:14,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:14,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:14,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:42:14,237 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 105 statements into 13 equivalence classes. [2025-03-08 05:42:14,260 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 72 of 105 statements. [2025-03-08 05:42:14,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-08 05:42:14,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:14,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 05:42:14,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 190 proven. 71 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2025-03-08 05:42:14,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 208 proven. 61 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-03-08 05:42:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889526469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:15,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 15] total 30 [2025-03-08 05:42:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005726003] [2025-03-08 05:42:15,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:15,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 05:42:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:15,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 05:42:15,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:42:15,368 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (27), 15 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-08 05:42:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:15,737 INFO L93 Difference]: Finished difference Result 112 states and 160 transitions. [2025-03-08 05:42:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 05:42:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (27), 15 states have call predecessors, (27), 12 states have call successors, (27) Word has length 105 [2025-03-08 05:42:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:15,739 INFO L225 Difference]: With dead ends: 112 [2025-03-08 05:42:15,739 INFO L226 Difference]: Without dead ends: 61 [2025-03-08 05:42:15,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 05:42:15,741 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:15,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 258 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-08 05:42:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2025-03-08 05:42:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2025-03-08 05:42:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2025-03-08 05:42:15,751 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 105 [2025-03-08 05:42:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:15,751 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2025-03-08 05:42:15,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 25 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 14 states have return successors, (27), 15 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-08 05:42:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2025-03-08 05:42:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2025-03-08 05:42:15,756 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:15,756 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:15,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:15,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:15,956 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:15,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1926600805, now seen corresponding path program 4 times [2025-03-08 05:42:15,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:15,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956355292] [2025-03-08 05:42:15,957 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:15,963 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 144 statements into 2 equivalence classes. [2025-03-08 05:42:15,982 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 144 of 144 statements. [2025-03-08 05:42:15,983 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:15,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 371 proven. 220 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2025-03-08 05:42:16,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956355292] [2025-03-08 05:42:16,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956355292] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11755703] [2025-03-08 05:42:16,583 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:16,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:16,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:16,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:16,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:42:16,644 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 144 statements into 2 equivalence classes. [2025-03-08 05:42:16,694 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 144 of 144 statements. [2025-03-08 05:42:16,694 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:16,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:16,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 05:42:16,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 367 proven. 209 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2025-03-08 05:42:16,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 410 proven. 201 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2025-03-08 05:42:19,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11755703] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:19,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:19,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 26] total 36 [2025-03-08 05:42:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414052879] [2025-03-08 05:42:19,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:19,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 05:42:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:19,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 05:42:19,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:42:19,727 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 29 states have internal predecessors, (74), 14 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (30), 18 states have call predecessors, (30), 14 states have call successors, (30) [2025-03-08 05:42:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:20,163 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2025-03-08 05:42:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 05:42:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 29 states have internal predecessors, (74), 14 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (30), 18 states have call predecessors, (30), 14 states have call successors, (30) Word has length 144 [2025-03-08 05:42:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:20,168 INFO L225 Difference]: With dead ends: 124 [2025-03-08 05:42:20,169 INFO L226 Difference]: Without dead ends: 74 [2025-03-08 05:42:20,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 272 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=650, Invalid=3010, Unknown=0, NotChecked=0, Total=3660 [2025-03-08 05:42:20,172 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:20,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 281 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-08 05:42:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2025-03-08 05:42:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 05:42:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2025-03-08 05:42:20,181 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 144 [2025-03-08 05:42:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:20,182 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2025-03-08 05:42:20,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 29 states have internal predecessors, (74), 14 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (30), 18 states have call predecessors, (30), 14 states have call successors, (30) [2025-03-08 05:42:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2025-03-08 05:42:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2025-03-08 05:42:20,187 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:20,187 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:20,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:42:20,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:20,387 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:20,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash -70666415, now seen corresponding path program 5 times [2025-03-08 05:42:20,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:20,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748103578] [2025-03-08 05:42:20,389 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:20,399 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 144 statements into 14 equivalence classes. [2025-03-08 05:42:20,411 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 79 of 144 statements. [2025-03-08 05:42:20,411 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-08 05:42:20,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 146 proven. 371 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2025-03-08 05:42:20,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748103578] [2025-03-08 05:42:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748103578] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438658933] [2025-03-08 05:42:20,647 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:20,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:20,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:20,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:20,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:42:20,743 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 144 statements into 14 equivalence classes. [2025-03-08 05:42:20,767 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 79 of 144 statements. [2025-03-08 05:42:20,767 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-08 05:42:20,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:20,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 05:42:20,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2025-03-08 05:42:20,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2025-03-08 05:42:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438658933] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:22,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 22 [2025-03-08 05:42:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051448705] [2025-03-08 05:42:22,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:22,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:42:22,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:22,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:42:22,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:42:22,081 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-08 05:42:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:22,283 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2025-03-08 05:42:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 05:42:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 144 [2025-03-08 05:42:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:22,284 INFO L225 Difference]: With dead ends: 120 [2025-03-08 05:42:22,285 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 05:42:22,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 275 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:42:22,287 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:22,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 136 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 05:42:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2025-03-08 05:42:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (18), 13 states have call predecessors, (18), 10 states have call successors, (18) [2025-03-08 05:42:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2025-03-08 05:42:22,296 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 144 [2025-03-08 05:42:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:22,297 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2025-03-08 05:42:22,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 19 states have internal predecessors, (67), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-08 05:42:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2025-03-08 05:42:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2025-03-08 05:42:22,298 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:22,299 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:22,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:22,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:22,503 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:22,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:22,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1579822898, now seen corresponding path program 6 times [2025-03-08 05:42:22,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:22,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650315006] [2025-03-08 05:42:22,503 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:22,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:22,511 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 157 statements into 15 equivalence classes. [2025-03-08 05:42:22,551 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 157 of 157 statements. [2025-03-08 05:42:22,551 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-03-08 05:42:22,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 291 proven. 522 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2025-03-08 05:42:23,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650315006] [2025-03-08 05:42:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650315006] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:23,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205298303] [2025-03-08 05:42:23,353 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:23,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:23,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:23,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:42:23,465 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 157 statements into 15 equivalence classes. [2025-03-08 05:42:23,514 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 157 of 157 statements. [2025-03-08 05:42:23,514 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-03-08 05:42:23,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-08 05:42:23,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2025-03-08 05:42:23,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2025-03-08 05:42:26,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205298303] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:26,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 27] total 48 [2025-03-08 05:42:26,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817670684] [2025-03-08 05:42:26,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:26,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-08 05:42:26,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:26,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-08 05:42:26,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2014, Unknown=0, NotChecked=0, Total=2256 [2025-03-08 05:42:26,631 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 22 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (43), 25 states have call predecessors, (43), 22 states have call successors, (43) [2025-03-08 05:42:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:27,327 INFO L93 Difference]: Finished difference Result 147 states and 196 transitions. [2025-03-08 05:42:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-08 05:42:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 22 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (43), 25 states have call predecessors, (43), 22 states have call successors, (43) Word has length 157 [2025-03-08 05:42:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:27,329 INFO L225 Difference]: With dead ends: 147 [2025-03-08 05:42:27,329 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 05:42:27,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 295 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=915, Invalid=5091, Unknown=0, NotChecked=0, Total=6006 [2025-03-08 05:42:27,331 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 121 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:27,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 454 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:42:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 05:42:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2025-03-08 05:42:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 11 states have call successors, (11), 5 states have call predecessors, (11), 11 states have return successors, (22), 15 states have call predecessors, (22), 11 states have call successors, (22) [2025-03-08 05:42:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2025-03-08 05:42:27,339 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 157 [2025-03-08 05:42:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:27,339 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2025-03-08 05:42:27,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 22 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (43), 25 states have call predecessors, (43), 22 states have call successors, (43) [2025-03-08 05:42:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2025-03-08 05:42:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2025-03-08 05:42:27,340 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:27,340 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:27,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:42:27,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:27,541 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:27,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash -682904789, now seen corresponding path program 7 times [2025-03-08 05:42:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:27,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130270761] [2025-03-08 05:42:27,541 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:42:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:27,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 170 statements into 1 equivalence classes. [2025-03-08 05:42:27,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 170 of 170 statements. [2025-03-08 05:42:27,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:27,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 495 proven. 368 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2025-03-08 05:42:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130270761] [2025-03-08 05:42:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130270761] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28773361] [2025-03-08 05:42:27,997 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:42:27,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:27,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:28,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:42:28,151 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 170 statements into 1 equivalence classes. [2025-03-08 05:42:28,195 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 170 of 170 statements. [2025-03-08 05:42:28,195 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:28,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:28,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 05:42:28,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2025-03-08 05:42:28,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2025-03-08 05:42:31,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28773361] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:31,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:31,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 28] total 32 [2025-03-08 05:42:31,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497875440] [2025-03-08 05:42:31,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:31,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 05:42:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:31,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 05:42:31,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:42:31,466 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2025-03-08 05:42:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:32,079 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2025-03-08 05:42:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-08 05:42:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) Word has length 170 [2025-03-08 05:42:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:32,081 INFO L225 Difference]: With dead ends: 162 [2025-03-08 05:42:32,081 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 05:42:32,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 323 SyntacticMatches, 19 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=867, Invalid=3555, Unknown=0, NotChecked=0, Total=4422 [2025-03-08 05:42:32,083 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 104 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:32,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 249 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:42:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 05:42:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2025-03-08 05:42:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 12 states have call successors, (12), 5 states have call predecessors, (12), 12 states have return successors, (26), 17 states have call predecessors, (26), 12 states have call successors, (26) [2025-03-08 05:42:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2025-03-08 05:42:32,095 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 170 [2025-03-08 05:42:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:32,095 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2025-03-08 05:42:32,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 28 states have internal predecessors, (76), 15 states have call successors, (18), 1 states have call predecessors, (18), 17 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2025-03-08 05:42:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2025-03-08 05:42:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-03-08 05:42:32,097 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:32,097 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:32,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 05:42:32,297 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,SelfDestructingSolverStorable8 [2025-03-08 05:42:32,298 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:32,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash -841014366, now seen corresponding path program 8 times [2025-03-08 05:42:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858108265] [2025-03-08 05:42:32,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:32,307 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 183 statements into 2 equivalence classes. [2025-03-08 05:42:32,327 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-03-08 05:42:32,328 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:32,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2025-03-08 05:42:32,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858108265] [2025-03-08 05:42:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858108265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:32,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670419181] [2025-03-08 05:42:32,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:32,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:32,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:32,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:32,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:42:32,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 183 statements into 2 equivalence classes. [2025-03-08 05:42:33,037 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-03-08 05:42:33,037 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:33,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:33,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-08 05:42:33,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2025-03-08 05:42:33,095 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2025-03-08 05:42:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670419181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:33,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:33,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 36 [2025-03-08 05:42:33,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540698733] [2025-03-08 05:42:33,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:33,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 05:42:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:33,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 05:42:33,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:42:33,844 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-08 05:42:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:36,333 INFO L93 Difference]: Finished difference Result 170 states and 241 transitions. [2025-03-08 05:42:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2025-03-08 05:42:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 183 [2025-03-08 05:42:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:36,335 INFO L225 Difference]: With dead ends: 170 [2025-03-08 05:42:36,335 INFO L226 Difference]: Without dead ends: 126 [2025-03-08 05:42:36,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1147, Invalid=8165, Unknown=0, NotChecked=0, Total=9312 [2025-03-08 05:42:36,338 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 203 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:36,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 612 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 3307 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 05:42:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-03-08 05:42:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2025-03-08 05:42:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 15 states have call successors, (15), 7 states have call predecessors, (15), 14 states have return successors, (37), 21 states have call predecessors, (37), 15 states have call successors, (37) [2025-03-08 05:42:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2025-03-08 05:42:36,351 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 183 [2025-03-08 05:42:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:36,352 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2025-03-08 05:42:36,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-08 05:42:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2025-03-08 05:42:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2025-03-08 05:42:36,354 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:36,354 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:36,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 05:42:36,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:42:36,558 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:36,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash -857915717, now seen corresponding path program 9 times [2025-03-08 05:42:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:36,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247564871] [2025-03-08 05:42:36,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:36,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 196 statements into 21 equivalence classes. [2025-03-08 05:42:36,613 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 184 of 196 statements. [2025-03-08 05:42:36,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-08 05:42:36,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 761 proven. 546 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2025-03-08 05:42:37,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:37,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247564871] [2025-03-08 05:42:37,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247564871] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:37,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400170375] [2025-03-08 05:42:37,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:37,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:37,854 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:37,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:42:38,014 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 196 statements into 21 equivalence classes. [2025-03-08 05:42:38,060 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 184 of 196 statements. [2025-03-08 05:42:38,060 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-08 05:42:38,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:38,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 05:42:38,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2025-03-08 05:42:38,223 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2025-03-08 05:42:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400170375] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:42,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:42,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 23, 32] total 56 [2025-03-08 05:42:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623712323] [2025-03-08 05:42:42,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:42,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-08 05:42:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:42,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-08 05:42:42,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2025-03-08 05:42:42,009 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 47 states have internal predecessors, (113), 26 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (52), 27 states have call predecessors, (52), 26 states have call successors, (52) [2025-03-08 05:42:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:43,143 INFO L93 Difference]: Finished difference Result 267 states and 466 transitions. [2025-03-08 05:42:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-08 05:42:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 47 states have internal predecessors, (113), 26 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (52), 27 states have call predecessors, (52), 26 states have call successors, (52) Word has length 196 [2025-03-08 05:42:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:43,146 INFO L225 Difference]: With dead ends: 267 [2025-03-08 05:42:43,146 INFO L226 Difference]: Without dead ends: 145 [2025-03-08 05:42:43,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 374 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1410, Invalid=6780, Unknown=0, NotChecked=0, Total=8190 [2025-03-08 05:42:43,149 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:43,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 520 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 05:42:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-03-08 05:42:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2025-03-08 05:42:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 16 states have call successors, (16), 10 states have call predecessors, (16), 18 states have return successors, (39), 23 states have call predecessors, (39), 16 states have call successors, (39) [2025-03-08 05:42:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2025-03-08 05:42:43,161 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 196 [2025-03-08 05:42:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:43,162 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2025-03-08 05:42:43,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 47 states have internal predecessors, (113), 26 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (52), 27 states have call predecessors, (52), 26 states have call successors, (52) [2025-03-08 05:42:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2025-03-08 05:42:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2025-03-08 05:42:43,163 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:43,164 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:43,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:42:43,364 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,SelfDestructingSolverStorable10 [2025-03-08 05:42:43,364 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:43,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2009742772, now seen corresponding path program 10 times [2025-03-08 05:42:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423537324] [2025-03-08 05:42:43,365 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:43,373 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 209 statements into 2 equivalence classes. [2025-03-08 05:42:43,386 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 209 of 209 statements. [2025-03-08 05:42:43,386 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:43,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 260 proven. 800 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2025-03-08 05:42:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:43,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423537324] [2025-03-08 05:42:43,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423537324] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:43,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536964698] [2025-03-08 05:42:43,654 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:43,657 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:43,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:42:43,884 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 209 statements into 2 equivalence classes. [2025-03-08 05:42:43,931 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 209 of 209 statements. [2025-03-08 05:42:43,931 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:43,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:43,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 05:42:43,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2025-03-08 05:42:44,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2025-03-08 05:42:45,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536964698] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:45,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:45,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 24 [2025-03-08 05:42:45,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411428196] [2025-03-08 05:42:45,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:45,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:42:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:45,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:42:45,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:42:45,812 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 21 states have internal predecessors, (75), 15 states have call successors, (21), 2 states have call predecessors, (21), 12 states have return successors, (31), 12 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-08 05:42:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:46,081 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2025-03-08 05:42:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:42:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 21 states have internal predecessors, (75), 15 states have call successors, (21), 2 states have call predecessors, (21), 12 states have return successors, (31), 12 states have call predecessors, (31), 15 states have call successors, (31) Word has length 209 [2025-03-08 05:42:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:46,083 INFO L225 Difference]: With dead ends: 215 [2025-03-08 05:42:46,083 INFO L226 Difference]: Without dead ends: 113 [2025-03-08 05:42:46,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 405 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 05:42:46,085 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:46,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 226 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-08 05:42:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2025-03-08 05:42:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 15 states have call successors, (15), 10 states have call predecessors, (15), 17 states have return successors, (30), 21 states have call predecessors, (30), 15 states have call successors, (30) [2025-03-08 05:42:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2025-03-08 05:42:46,100 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 209 [2025-03-08 05:42:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:46,100 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2025-03-08 05:42:46,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 21 states have internal predecessors, (75), 15 states have call successors, (21), 2 states have call predecessors, (21), 12 states have return successors, (31), 12 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-08 05:42:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2025-03-08 05:42:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2025-03-08 05:42:46,103 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:46,103 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:46,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:46,307 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,SelfDestructingSolverStorable11 [2025-03-08 05:42:46,307 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:46,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1133567937, now seen corresponding path program 11 times [2025-03-08 05:42:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:46,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111376259] [2025-03-08 05:42:46,307 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:46,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:46,317 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 281 statements into 25 equivalence classes. [2025-03-08 05:42:46,358 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) and asserted 260 of 281 statements. [2025-03-08 05:42:46,358 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2025-03-08 05:42:46,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1493 proven. 814 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2025-03-08 05:42:47,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111376259] [2025-03-08 05:42:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111376259] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:47,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036362570] [2025-03-08 05:42:47,056 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:47,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:47,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:47,059 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:47,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:42:47,293 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 281 statements into 25 equivalence classes. [2025-03-08 05:42:47,360 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) and asserted 260 of 281 statements. [2025-03-08 05:42:47,360 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2025-03-08 05:42:47,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:47,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-08 05:42:47,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1483 proven. 777 refuted. 0 times theorem prover too weak. 2069 trivial. 0 not checked. [2025-03-08 05:42:47,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1579 proven. 819 refuted. 0 times theorem prover too weak. 1931 trivial. 0 not checked. [2025-03-08 05:42:55,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036362570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:55,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:55,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 40] total 43 [2025-03-08 05:42:55,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690610016] [2025-03-08 05:42:55,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:55,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 05:42:55,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:55,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 05:42:55,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 05:42:55,171 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 37 states have internal predecessors, (99), 22 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2025-03-08 05:42:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:55,731 INFO L93 Difference]: Finished difference Result 224 states and 277 transitions. [2025-03-08 05:42:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-08 05:42:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 37 states have internal predecessors, (99), 22 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) Word has length 281 [2025-03-08 05:42:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:55,737 INFO L225 Difference]: With dead ends: 224 [2025-03-08 05:42:55,737 INFO L226 Difference]: Without dead ends: 127 [2025-03-08 05:42:55,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 540 SyntacticMatches, 27 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1273, Invalid=5369, Unknown=0, NotChecked=0, Total=6642 [2025-03-08 05:42:55,739 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:55,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 306 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:42:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-08 05:42:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2025-03-08 05:42:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 16 states have call successors, (16), 10 states have call predecessors, (16), 18 states have return successors, (30), 23 states have call predecessors, (30), 16 states have call successors, (30) [2025-03-08 05:42:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2025-03-08 05:42:55,748 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 281 [2025-03-08 05:42:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:55,749 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2025-03-08 05:42:55,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 37 states have internal predecessors, (99), 22 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2025-03-08 05:42:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2025-03-08 05:42:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2025-03-08 05:42:55,751 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:55,752 INFO L218 NwaCegarLoop]: trace histogram [44, 44, 24, 20, 19, 19, 19, 19, 19, 19, 19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:55,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:55,952 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,SelfDestructingSolverStorable12 [2025-03-08 05:42:55,952 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:55,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:55,952 INFO L85 PathProgramCache]: Analyzing trace with hash 144313614, now seen corresponding path program 12 times [2025-03-08 05:42:55,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:55,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311508114] [2025-03-08 05:42:55,953 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:55,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:55,963 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 294 statements into 25 equivalence classes. [2025-03-08 05:42:56,003 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) and asserted 284 of 294 statements. [2025-03-08 05:42:56,004 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2025-03-08 05:42:56,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 215 proven. 430 refuted. 0 times theorem prover too weak. 4119 trivial. 0 not checked. [2025-03-08 05:42:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311508114] [2025-03-08 05:42:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311508114] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692350313] [2025-03-08 05:42:56,139 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:56,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:56,141 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:42:56,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:42:56,458 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 294 statements into 25 equivalence classes. [2025-03-08 05:42:56,533 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) and asserted 284 of 294 statements. [2025-03-08 05:42:56,533 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2025-03-08 05:42:56,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:56,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 05:42:56,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 215 proven. 426 refuted. 0 times theorem prover too weak. 4123 trivial. 0 not checked. [2025-03-08 05:42:56,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 215 proven. 433 refuted. 0 times theorem prover too weak. 4116 trivial. 0 not checked. [2025-03-08 05:42:57,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692350313] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:57,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:57,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 11 [2025-03-08 05:42:57,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354356549] [2025-03-08 05:42:57,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:57,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:42:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:57,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:42:57,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:42:57,065 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 7 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-08 05:42:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:57,158 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2025-03-08 05:42:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:42:57,158 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), 7 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 294 [2025-03-08 05:42:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:57,159 INFO L225 Difference]: With dead ends: 107 [2025-03-08 05:42:57,159 INFO L226 Difference]: Without dead ends: 0 [2025-03-08 05:42:57,159 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:42:57,160 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:57,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 104 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-08 05:42:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-08 05:42:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:42:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-08 05:42:57,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 294 [2025-03-08 05:42:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:57,160 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-08 05:42:57,160 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), 7 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-08 05:42:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-08 05:42:57,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-08 05:42:57,162 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-08 05:42:57,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 05:42:57,363 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,SelfDestructingSolverStorable13 [2025-03-08 05:42:57,365 INFO L422 BasicCegarLoop]: Path program histogram: [12, 1, 1] [2025-03-08 05:42:57,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-08 05:43:29,108 WARN L286 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 205 DAG size of output: 229 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)