./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/recHanoi01.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/recHanoi01.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 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:42:37,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:42:37,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:42:37,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:42:37,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:42:37,761 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:42:37,762 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:42:37,762 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:42:37,762 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:42:37,762 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:42:37,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:42:37,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:42:37,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:42:37,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:42:37,763 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:42:37,765 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:37,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:42:37,765 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:42:37,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:42:37,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:42:37,766 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 -> 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 [2025-03-08 05:42:38,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:42:38,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:42:38,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:42:38,114 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:42:38,114 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:42:38,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi01.c [2025-03-08 05:42:39,206 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb041cb7/dc75651992e142e8b69e35e4f389b77c/FLAGa3bd411bb [2025-03-08 05:42:39,464 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:42:39,465 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi01.c [2025-03-08 05:42:39,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb041cb7/dc75651992e142e8b69e35e4f389b77c/FLAGa3bd411bb [2025-03-08 05:42:39,775 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb041cb7/dc75651992e142e8b69e35e4f389b77c [2025-03-08 05:42:39,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:42:39,778 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:42:39,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:39,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:42:39,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:42:39,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6bf1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39, skipping insertion in model container [2025-03-08 05:42:39,785 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,795 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:42:39,897 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/recHanoi01.c[1213,1226] [2025-03-08 05:42:39,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:39,908 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:42:39,919 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/recHanoi01.c[1213,1226] [2025-03-08 05:42:39,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:39,930 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:42:39,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39 WrapperNode [2025-03-08 05:42:39,931 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:39,932 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:39,933 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:42:39,933 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:42:39,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,953 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2025-03-08 05:42:39,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:39,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:42:39,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:42:39,955 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:42:39,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,965 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,972 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 05:42:39,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,979 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:42:39,984 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:42:39,984 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:42:39,984 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:42:39,985 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (1/1) ... [2025-03-08 05:42:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:39,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:40,013 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 05:42:40,018 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 05:42:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:42:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2025-03-08 05:42:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2025-03-08 05:42:40,036 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2025-03-08 05:42:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2025-03-08 05:42:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:42:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:42:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:42:40,080 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:42:40,082 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:42:40,137 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: havoc #t~ret4; [2025-03-08 05:42:40,179 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-08 05:42:40,179 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:42:40,187 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:42:40,187 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:42:40,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:40 BoogieIcfgContainer [2025-03-08 05:42:40,187 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:42:40,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:42:40,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:42:40,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:42:40,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:42:39" (1/3) ... [2025-03-08 05:42:40,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d7824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:40, skipping insertion in model container [2025-03-08 05:42:40,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:39" (2/3) ... [2025-03-08 05:42:40,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d7824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:40, skipping insertion in model container [2025-03-08 05:42:40,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:40" (3/3) ... [2025-03-08 05:42:40,195 INFO L128 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2025-03-08 05:42:40,207 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:42:40,208 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recHanoi01.c that has 3 procedures, 24 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:42:40,253 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:42:40,264 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;@21d62937, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:42:40,264 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:42:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:42:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 05:42:40,275 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:40,275 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:40,276 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:40,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1860312994, now seen corresponding path program 1 times [2025-03-08 05:42:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472514790] [2025-03-08 05:42:40,286 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:40,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 05:42:40,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 05:42:40,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:40,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:40,482 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 05:42:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472514790] [2025-03-08 05:42:40,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472514790] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:40,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:40,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231056475] [2025-03-08 05:42:40,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:40,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:40,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:40,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:40,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:40,504 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:42:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:40,575 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2025-03-08 05:42:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:40,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2025-03-08 05:42:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:40,582 INFO L225 Difference]: With dead ends: 41 [2025-03-08 05:42:40,582 INFO L226 Difference]: Without dead ends: 23 [2025-03-08 05:42:40,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:40,587 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:40,589 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-08 05:42:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2025-03-08 05:42:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:42:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2025-03-08 05:42:40,619 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2025-03-08 05:42:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:40,619 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2025-03-08 05:42:40,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:42:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2025-03-08 05:42:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 05:42:40,621 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:40,621 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:40,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:42:40,622 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:40,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1011280448, now seen corresponding path program 1 times [2025-03-08 05:42:40,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:40,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426048416] [2025-03-08 05:42:40,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:40,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:40,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:42:40,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:42:40,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:40,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:42:40,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426048416] [2025-03-08 05:42:40,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426048416] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032770700] [2025-03-08 05:42:40,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:40,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:40,942 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 05:42:40,944 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 05:42:40,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:42:41,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:42:41,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:41,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:41,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 05:42:41,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 05:42:41,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:42:41,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032770700] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:41,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:41,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 17 [2025-03-08 05:42:41,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839055308] [2025-03-08 05:42:41,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:41,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:42:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:41,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:42:41,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:42:41,343 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-08 05:42:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:41,679 INFO L93 Difference]: Finished difference Result 74 states and 104 transitions. [2025-03-08 05:42:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:42:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 26 [2025-03-08 05:42:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:41,681 INFO L225 Difference]: With dead ends: 74 [2025-03-08 05:42:41,681 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 05:42:41,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:42:41,682 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:41,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 107 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 05:42:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2025-03-08 05:42:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 34 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (33), 16 states have call predecessors, (33), 14 states have call successors, (33) [2025-03-08 05:42:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2025-03-08 05:42:41,701 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 26 [2025-03-08 05:42:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:41,701 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2025-03-08 05:42:41,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-03-08 05:42:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2025-03-08 05:42:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 05:42:41,704 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:41,704 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:41,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:41,904 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 05:42:41,905 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:41,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1681696674, now seen corresponding path program 2 times [2025-03-08 05:42:41,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:41,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890956371] [2025-03-08 05:42:41,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:41,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:41,914 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-08 05:42:41,929 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:42:41,929 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:41,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-08 05:42:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890956371] [2025-03-08 05:42:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890956371] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117337460] [2025-03-08 05:42:42,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:42,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:42,069 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 05:42:42,069 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 05:42:42,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-08 05:42:42,118 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:42:42,118 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:42,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:42,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:42:42,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-08 05:42:42,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 05:42:42,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117337460] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:42,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:42,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2025-03-08 05:42:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379486728] [2025-03-08 05:42:42,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:42,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:42:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:42,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:42:42,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:42:42,470 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-08 05:42:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:42,582 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2025-03-08 05:42:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 36 [2025-03-08 05:42:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:42,584 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:42:42,584 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 05:42:42,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:42:42,585 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:42,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 05:42:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2025-03-08 05:42:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2025-03-08 05:42:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2025-03-08 05:42:42,597 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 36 [2025-03-08 05:42:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:42,597 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2025-03-08 05:42:42,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-08 05:42:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2025-03-08 05:42:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 05:42:42,598 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:42,598 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:42,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:42:42,802 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 05:42:42,802 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:42,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1378780977, now seen corresponding path program 1 times [2025-03-08 05:42:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782729326] [2025-03-08 05:42:42,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:42,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:42:42,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:42:42,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:42,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:42:42,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782729326] [2025-03-08 05:42:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782729326] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810849995] [2025-03-08 05:42:42,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:42,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:42,931 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 05:42:42,932 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 05:42:42,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:42:42,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:42:42,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:42,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:42,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:42:42,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:42:43,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:42:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810849995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:43,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:43,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 13 [2025-03-08 05:42:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146868107] [2025-03-08 05:42:43,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:43,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:42:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:43,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:42:43,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:42:43,207 INFO L87 Difference]: Start difference. First operand 48 states and 72 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:42:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:43,288 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2025-03-08 05:42:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) Word has length 32 [2025-03-08 05:42:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:43,290 INFO L225 Difference]: With dead ends: 57 [2025-03-08 05:42:43,290 INFO L226 Difference]: Without dead ends: 47 [2025-03-08 05:42:43,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:42:43,292 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:43,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 110 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-08 05:42:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2025-03-08 05:42:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2025-03-08 05:42:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2025-03-08 05:42:43,305 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 32 [2025-03-08 05:42:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:43,305 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2025-03-08 05:42:43,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:42:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2025-03-08 05:42:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 05:42:43,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:43,306 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:43,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:42:43,507 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 05:42:43,507 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:43,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash 985378255, now seen corresponding path program 2 times [2025-03-08 05:42:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:43,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055534425] [2025-03-08 05:42:43,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:43,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 05:42:43,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 05:42:43,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:43,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-08 05:42:43,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:43,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055534425] [2025-03-08 05:42:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055534425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:43,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942887555] [2025-03-08 05:42:43,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:43,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:43,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:43,923 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 05:42:43,925 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 05:42:43,959 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 05:42:43,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 05:42:43,981 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:43,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:43,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 05:42:43,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-08 05:42:44,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 05:42:44,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942887555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:44,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:44,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 18] total 32 [2025-03-08 05:42:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646151565] [2025-03-08 05:42:44,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:44,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 05:42:44,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:44,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 05:42:44,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:42:44,542 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand has 32 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 25 states have internal predecessors, (47), 10 states have call successors, (20), 8 states have call predecessors, (20), 14 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2025-03-08 05:42:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:45,424 INFO L93 Difference]: Finished difference Result 115 states and 232 transitions. [2025-03-08 05:42:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 05:42:45,425 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 25 states have internal predecessors, (47), 10 states have call successors, (20), 8 states have call predecessors, (20), 14 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 52 [2025-03-08 05:42:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:45,428 INFO L225 Difference]: With dead ends: 115 [2025-03-08 05:42:45,428 INFO L226 Difference]: Without dead ends: 109 [2025-03-08 05:42:45,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=2552, Unknown=0, NotChecked=0, Total=2970 [2025-03-08 05:42:45,433 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:45,433 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 199 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 05:42:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-08 05:42:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 77. [2025-03-08 05:42:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 19 states have call successors, (19), 7 states have call predecessors, (19), 17 states have return successors, (71), 26 states have call predecessors, (71), 19 states have call successors, (71) [2025-03-08 05:42:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 134 transitions. [2025-03-08 05:42:45,471 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 134 transitions. Word has length 52 [2025-03-08 05:42:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:45,472 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 134 transitions. [2025-03-08 05:42:45,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 25 states have internal predecessors, (47), 10 states have call successors, (20), 8 states have call predecessors, (20), 14 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2025-03-08 05:42:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 134 transitions. [2025-03-08 05:42:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 05:42:45,477 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:45,477 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:45,483 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 05:42:45,678 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 05:42:45,678 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:45,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1196482963, now seen corresponding path program 3 times [2025-03-08 05:42:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:45,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838647538] [2025-03-08 05:42:45,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:45,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:45,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 9 equivalence classes. [2025-03-08 05:42:45,693 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 47 of 62 statements. [2025-03-08 05:42:45,693 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:42:45,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 73 proven. 11 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 05:42:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:45,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838647538] [2025-03-08 05:42:45,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838647538] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:45,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64016945] [2025-03-08 05:42:45,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:45,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:45,783 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 05:42:45,785 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 05:42:45,818 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 62 statements into 9 equivalence classes. [2025-03-08 05:42:45,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 47 of 62 statements. [2025-03-08 05:42:45,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:42:45,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:45,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:42:45,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 75 proven. 11 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-03-08 05:42:45,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 75 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2025-03-08 05:42:46,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64016945] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:46,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:46,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 13 [2025-03-08 05:42:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570931443] [2025-03-08 05:42:46,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:46,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:42:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:46,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:42:46,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:42:46,179 INFO L87 Difference]: Start difference. First operand 77 states and 134 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-08 05:42:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:46,303 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2025-03-08 05:42:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 62 [2025-03-08 05:42:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:46,305 INFO L225 Difference]: With dead ends: 134 [2025-03-08 05:42:46,305 INFO L226 Difference]: Without dead ends: 91 [2025-03-08 05:42:46,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:42:46,307 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:46,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 121 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-08 05:42:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2025-03-08 05:42:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 19 states have call successors, (19), 9 states have call predecessors, (19), 17 states have return successors, (60), 26 states have call predecessors, (60), 19 states have call successors, (60) [2025-03-08 05:42:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 127 transitions. [2025-03-08 05:42:46,334 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 127 transitions. Word has length 62 [2025-03-08 05:42:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:46,334 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 127 transitions. [2025-03-08 05:42:46,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-08 05:42:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 127 transitions. [2025-03-08 05:42:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 05:42:46,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:46,337 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:46,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:46,539 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 05:42:46,540 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:46,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1376337056, now seen corresponding path program 4 times [2025-03-08 05:42:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198051950] [2025-03-08 05:42:46,541 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:46,548 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 58 statements into 2 equivalence classes. [2025-03-08 05:42:46,560 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 58 statements. [2025-03-08 05:42:46,560 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:46,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-08 05:42:46,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:46,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198051950] [2025-03-08 05:42:46,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198051950] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:46,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261072603] [2025-03-08 05:42:46,686 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:46,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:46,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:46,688 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 05:42:46,689 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 05:42:46,718 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 58 statements into 2 equivalence classes. [2025-03-08 05:42:46,735 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 52 of 58 statements. [2025-03-08 05:42:46,735 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:46,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:46,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:42:46,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-08 05:42:46,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-08 05:42:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261072603] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:47,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 19 [2025-03-08 05:42:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962572925] [2025-03-08 05:42:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:47,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:42:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:47,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:42:47,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:42:47,168 INFO L87 Difference]: Start difference. First operand 81 states and 127 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (16), 7 states have call predecessors, (16), 12 states have call successors, (16) [2025-03-08 05:42:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:47,360 INFO L93 Difference]: Finished difference Result 133 states and 253 transitions. [2025-03-08 05:42:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:42:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (16), 7 states have call predecessors, (16), 12 states have call successors, (16) Word has length 58 [2025-03-08 05:42:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:47,363 INFO L225 Difference]: With dead ends: 133 [2025-03-08 05:42:47,365 INFO L226 Difference]: Without dead ends: 115 [2025-03-08 05:42:47,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:42:47,366 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:47,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 170 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-08 05:42:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2025-03-08 05:42:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 32 states have call successors, (32), 10 states have call predecessors, (32), 22 states have return successors, (121), 43 states have call predecessors, (121), 32 states have call successors, (121) [2025-03-08 05:42:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 208 transitions. [2025-03-08 05:42:47,394 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 208 transitions. Word has length 58 [2025-03-08 05:42:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:47,394 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 208 transitions. [2025-03-08 05:42:47,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 12 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (16), 7 states have call predecessors, (16), 12 states have call successors, (16) [2025-03-08 05:42:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 208 transitions. [2025-03-08 05:42:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-08 05:42:47,396 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:47,396 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:47,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:42:47,600 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 05:42:47,600 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:47,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash 425977837, now seen corresponding path program 5 times [2025-03-08 05:42:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:47,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70439884] [2025-03-08 05:42:47,600 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:47,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:47,605 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 8 equivalence classes. [2025-03-08 05:42:47,607 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 62 statements. [2025-03-08 05:42:47,607 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 05:42:47,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 42 proven. 45 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2025-03-08 05:42:47,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:47,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70439884] [2025-03-08 05:42:47,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70439884] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:47,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232027209] [2025-03-08 05:42:47,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:47,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:47,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:47,647 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 05:42:47,649 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 05:42:47,681 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 62 statements into 8 equivalence classes. [2025-03-08 05:42:47,693 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 25 of 62 statements. [2025-03-08 05:42:47,693 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-08 05:42:47,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:47,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:42:47,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 101 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-08 05:42:47,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 42 proven. 46 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-03-08 05:42:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232027209] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:47,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:47,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 11 [2025-03-08 05:42:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766221008] [2025-03-08 05:42:47,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:47,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:42:47,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:47,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:42:47,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:42:47,952 INFO L87 Difference]: Start difference. First operand 105 states and 208 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2025-03-08 05:42:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:48,057 INFO L93 Difference]: Finished difference Result 181 states and 393 transitions. [2025-03-08 05:42:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2025-03-08 05:42:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:48,059 INFO L225 Difference]: With dead ends: 181 [2025-03-08 05:42:48,060 INFO L226 Difference]: Without dead ends: 103 [2025-03-08 05:42:48,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-08 05:42:48,063 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:48,063 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 91 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-03-08 05:42:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2025-03-08 05:42:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 50 states have internal predecessors, (55), 26 states have call successors, (26), 12 states have call predecessors, (26), 19 states have return successors, (62), 34 states have call predecessors, (62), 26 states have call successors, (62) [2025-03-08 05:42:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 143 transitions. [2025-03-08 05:42:48,078 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 143 transitions. Word has length 62 [2025-03-08 05:42:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:48,078 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 143 transitions. [2025-03-08 05:42:48,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2025-03-08 05:42:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 143 transitions. [2025-03-08 05:42:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-08 05:42:48,079 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:48,079 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:48,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:48,280 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 05:42:48,280 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:48,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash 175303759, now seen corresponding path program 6 times [2025-03-08 05:42:48,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230381295] [2025-03-08 05:42:48,281 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:48,285 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 72 statements into 10 equivalence classes. [2025-03-08 05:42:48,296 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 67 of 72 statements. [2025-03-08 05:42:48,296 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 05:42:48,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 73 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-08 05:42:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:48,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230381295] [2025-03-08 05:42:48,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230381295] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:48,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298581429] [2025-03-08 05:42:48,403 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:48,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:48,405 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 05:42:48,406 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 05:42:48,445 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 72 statements into 10 equivalence classes. [2025-03-08 05:42:48,473 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 67 of 72 statements. [2025-03-08 05:42:48,473 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 05:42:48,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:48,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:42:48,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2025-03-08 05:42:48,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2025-03-08 05:42:48,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298581429] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:48,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:48,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 19 [2025-03-08 05:42:48,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631483648] [2025-03-08 05:42:48,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:48,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:42:48,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:48,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:42:48,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:42:48,960 INFO L87 Difference]: Start difference. First operand 97 states and 143 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2025-03-08 05:42:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:49,092 INFO L93 Difference]: Finished difference Result 110 states and 164 transitions. [2025-03-08 05:42:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:42:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) Word has length 72 [2025-03-08 05:42:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:49,093 INFO L225 Difference]: With dead ends: 110 [2025-03-08 05:42:49,093 INFO L226 Difference]: Without dead ends: 87 [2025-03-08 05:42:49,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:42:49,094 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:49,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 126 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-08 05:42:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2025-03-08 05:42:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 40 states have internal predecessors, (44), 20 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (40), 24 states have call predecessors, (40), 20 states have call successors, (40) [2025-03-08 05:42:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2025-03-08 05:42:49,106 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 72 [2025-03-08 05:42:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:49,106 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2025-03-08 05:42:49,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 11 states have call successors, (18) [2025-03-08 05:42:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2025-03-08 05:42:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-08 05:42:49,108 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:49,108 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:49,114 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 05:42:49,309 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 05:42:49,309 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:49,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash 822685984, now seen corresponding path program 7 times [2025-03-08 05:42:49,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:49,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673504665] [2025-03-08 05:42:49,309 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:42:49,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:49,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-08 05:42:49,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-08 05:42:49,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:49,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 34 proven. 161 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2025-03-08 05:42:49,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:49,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673504665] [2025-03-08 05:42:49,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673504665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:49,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680157770] [2025-03-08 05:42:49,836 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:42:49,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:49,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:49,837 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 05:42:49,838 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 05:42:49,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-08 05:42:49,911 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-08 05:42:49,911 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:49,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:49,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-08 05:42:49,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2025-03-08 05:42:50,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-08 05:42:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680157770] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:51,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 32] total 51 [2025-03-08 05:42:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478606119] [2025-03-08 05:42:51,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:51,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-08 05:42:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:51,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-08 05:42:51,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2025-03-08 05:42:51,108 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand has 51 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 38 states have internal predecessors, (69), 16 states have call successors, (27), 12 states have call predecessors, (27), 24 states have return successors, (33), 24 states have call predecessors, (33), 16 states have call successors, (33) [2025-03-08 05:42:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:54,041 INFO L93 Difference]: Finished difference Result 338 states and 592 transitions. [2025-03-08 05:42:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-03-08 05:42:54,042 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 38 states have internal predecessors, (69), 16 states have call successors, (27), 12 states have call predecessors, (27), 24 states have return successors, (33), 24 states have call predecessors, (33), 16 states have call successors, (33) Word has length 98 [2025-03-08 05:42:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:54,045 INFO L225 Difference]: With dead ends: 338 [2025-03-08 05:42:54,045 INFO L226 Difference]: Without dead ends: 334 [2025-03-08 05:42:54,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1764, Invalid=11576, Unknown=0, NotChecked=0, Total=13340 [2025-03-08 05:42:54,049 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 465 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:54,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 351 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 05:42:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2025-03-08 05:42:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 242. [2025-03-08 05:42:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 123 states have (on average 1.089430894308943) internal successors, (134), 118 states have internal predecessors, (134), 68 states have call successors, (68), 31 states have call predecessors, (68), 50 states have return successors, (208), 92 states have call predecessors, (208), 68 states have call successors, (208) [2025-03-08 05:42:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 410 transitions. [2025-03-08 05:42:54,090 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 410 transitions. Word has length 98 [2025-03-08 05:42:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:54,090 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 410 transitions. [2025-03-08 05:42:54,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 38 states have internal predecessors, (69), 16 states have call successors, (27), 12 states have call predecessors, (27), 24 states have return successors, (33), 24 states have call predecessors, (33), 16 states have call successors, (33) [2025-03-08 05:42:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 410 transitions. [2025-03-08 05:42:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-08 05:42:54,093 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:54,093 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:54,102 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 05:42:54,294 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 05:42:54,294 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:54,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -219099025, now seen corresponding path program 8 times [2025-03-08 05:42:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621840163] [2025-03-08 05:42:54,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:54,299 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 104 statements into 2 equivalence classes. [2025-03-08 05:42:54,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 05:42:54,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:54,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 42 proven. 147 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2025-03-08 05:42:54,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621840163] [2025-03-08 05:42:54,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621840163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859767478] [2025-03-08 05:42:54,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:54,493 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 05:42:54,495 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 05:42:54,536 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 104 statements into 2 equivalence classes. [2025-03-08 05:42:54,568 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 05:42:54,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:54,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:54,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:42:54,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2025-03-08 05:42:54,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-08 05:42:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859767478] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:55,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:55,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 23 [2025-03-08 05:42:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393288983] [2025-03-08 05:42:55,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:55,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:42:55,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:55,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:42:55,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:42:55,307 INFO L87 Difference]: Start difference. First operand 242 states and 410 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 13 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (20), 9 states have call predecessors, (20), 13 states have call successors, (20) [2025-03-08 05:42:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:55,505 INFO L93 Difference]: Finished difference Result 336 states and 702 transitions. [2025-03-08 05:42:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:42:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 13 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (20), 9 states have call predecessors, (20), 13 states have call successors, (20) Word has length 104 [2025-03-08 05:42:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:55,508 INFO L225 Difference]: With dead ends: 336 [2025-03-08 05:42:55,508 INFO L226 Difference]: Without dead ends: 315 [2025-03-08 05:42:55,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 195 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:42:55,511 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:55,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 184 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2025-03-08 05:42:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 236. [2025-03-08 05:42:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 112 states have internal predecessors, (128), 68 states have call successors, (68), 30 states have call predecessors, (68), 49 states have return successors, (224), 93 states have call predecessors, (224), 68 states have call successors, (224) [2025-03-08 05:42:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 420 transitions. [2025-03-08 05:42:55,568 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 420 transitions. Word has length 104 [2025-03-08 05:42:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:55,569 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 420 transitions. [2025-03-08 05:42:55,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 13 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (20), 9 states have call predecessors, (20), 13 states have call successors, (20) [2025-03-08 05:42:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 420 transitions. [2025-03-08 05:42:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2025-03-08 05:42:55,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:55,573 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:55,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:55,773 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 05:42:55,774 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:55,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1763554784, now seen corresponding path program 9 times [2025-03-08 05:42:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136635237] [2025-03-08 05:42:55,774 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:55,780 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 178 statements into 27 equivalence classes. [2025-03-08 05:42:55,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 98 of 178 statements. [2025-03-08 05:42:55,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-08 05:42:55,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 350 refuted. 0 times theorem prover too weak. 1637 trivial. 0 not checked. [2025-03-08 05:42:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:55,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136635237] [2025-03-08 05:42:55,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136635237] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:55,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695574281] [2025-03-08 05:42:55,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:55,970 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 05:42:55,971 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 05:42:56,027 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 178 statements into 27 equivalence classes. [2025-03-08 05:42:56,069 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 98 of 178 statements. [2025-03-08 05:42:56,069 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-08 05:42:56,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:56,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 05:42:56,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 343 refuted. 0 times theorem prover too weak. 1644 trivial. 0 not checked. [2025-03-08 05:42:56,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 97 proven. 356 refuted. 0 times theorem prover too weak. 1631 trivial. 0 not checked. [2025-03-08 05:42:56,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695574281] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:56,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:56,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 22 [2025-03-08 05:42:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825193654] [2025-03-08 05:42:56,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:56,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:42:56,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:56,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:42:56,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:42:56,657 INFO L87 Difference]: Start difference. First operand 236 states and 420 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 14 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (20), 9 states have call predecessors, (20), 14 states have call successors, (20) [2025-03-08 05:42:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:57,053 INFO L93 Difference]: Finished difference Result 468 states and 983 transitions. [2025-03-08 05:42:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 05:42:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 14 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (20), 9 states have call predecessors, (20), 14 states have call successors, (20) Word has length 178 [2025-03-08 05:42:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:57,058 INFO L225 Difference]: With dead ends: 468 [2025-03-08 05:42:57,058 INFO L226 Difference]: Without dead ends: 254 [2025-03-08 05:42:57,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:42:57,060 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:57,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 189 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-03-08 05:42:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2025-03-08 05:42:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 113 states have internal predecessors, (125), 68 states have call successors, (68), 32 states have call predecessors, (68), 43 states have return successors, (201), 82 states have call predecessors, (201), 68 states have call successors, (201) [2025-03-08 05:42:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 394 transitions. [2025-03-08 05:42:57,109 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 394 transitions. Word has length 178 [2025-03-08 05:42:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:57,109 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 394 transitions. [2025-03-08 05:42:57,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 14 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (20), 9 states have call predecessors, (20), 14 states have call successors, (20) [2025-03-08 05:42:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 394 transitions. [2025-03-08 05:42:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2025-03-08 05:42:57,112 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:57,112 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 20, 19, 19, 19, 19, 19, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:57,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:42:57,317 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 05:42:57,317 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:57,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash -962330129, now seen corresponding path program 10 times [2025-03-08 05:42:57,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:57,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960591487] [2025-03-08 05:42:57,318 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:57,325 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 224 statements into 2 equivalence classes. [2025-03-08 05:42:57,367 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 217 of 224 statements. [2025-03-08 05:42:57,368 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:57,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 523 proven. 649 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2025-03-08 05:42:57,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960591487] [2025-03-08 05:42:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960591487] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083875117] [2025-03-08 05:42:57,617 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:57,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:57,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:57,623 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 05:42:57,636 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 05:42:57,708 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 224 statements into 2 equivalence classes. [2025-03-08 05:42:57,787 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 217 of 224 statements. [2025-03-08 05:42:57,787 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:42:57,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:57,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:42:57,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 523 proven. 649 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2025-03-08 05:42:57,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3336 backedges. 523 proven. 674 refuted. 0 times theorem prover too weak. 2139 trivial. 0 not checked. [2025-03-08 05:42:59,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083875117] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:59,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:59,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 23 [2025-03-08 05:42:59,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886688169] [2025-03-08 05:42:59,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:59,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:42:59,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:59,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:42:59,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:42:59,088 INFO L87 Difference]: Start difference. First operand 228 states and 394 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 18 states have call successors, (25), 2 states have call predecessors, (25), 11 states have return successors, (31), 12 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:42:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:59,321 INFO L93 Difference]: Finished difference Result 350 states and 633 transitions. [2025-03-08 05:42:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:42:59,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 18 states have call successors, (25), 2 states have call predecessors, (25), 11 states have return successors, (31), 12 states have call predecessors, (31), 18 states have call successors, (31) Word has length 224 [2025-03-08 05:42:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:59,324 INFO L225 Difference]: With dead ends: 350 [2025-03-08 05:42:59,324 INFO L226 Difference]: Without dead ends: 208 [2025-03-08 05:42:59,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 436 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:42:59,325 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:59,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 230 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2025-03-08 05:42:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 177. [2025-03-08 05:42:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 53 states have call successors, (53), 24 states have call predecessors, (53), 33 states have return successors, (94), 62 states have call predecessors, (94), 53 states have call successors, (94) [2025-03-08 05:42:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 242 transitions. [2025-03-08 05:42:59,346 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 242 transitions. Word has length 224 [2025-03-08 05:42:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:59,347 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 242 transitions. [2025-03-08 05:42:59,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 18 states have call successors, (25), 2 states have call predecessors, (25), 11 states have return successors, (31), 12 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:42:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 242 transitions. [2025-03-08 05:42:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2025-03-08 05:42:59,348 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:59,348 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:59,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:42:59,553 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 05:42:59,553 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:59,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1305684335, now seen corresponding path program 11 times [2025-03-08 05:42:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317793476] [2025-03-08 05:42:59,553 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:59,560 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 184 statements into 27 equivalence classes. [2025-03-08 05:42:59,585 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) and asserted 184 of 184 statements. [2025-03-08 05:42:59,585 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2025-03-08 05:42:59,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 74 proven. 705 refuted. 0 times theorem prover too weak. 1321 trivial. 0 not checked. [2025-03-08 05:43:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317793476] [2025-03-08 05:43:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317793476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526680320] [2025-03-08 05:43:00,434 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:00,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:00,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:43:00,512 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 184 statements into 27 equivalence classes. [2025-03-08 05:43:00,579 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) and asserted 184 of 184 statements. [2025-03-08 05:43:00,579 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2025-03-08 05:43:00,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:00,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 175 conjuncts are in the unsatisfiable core [2025-03-08 05:43:00,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2025-03-08 05:43:00,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-08 05:43:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526680320] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:03,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:03,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 58] total 82 [2025-03-08 05:43:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408057150] [2025-03-08 05:43:03,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:03,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2025-03-08 05:43:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:03,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2025-03-08 05:43:03,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=6346, Unknown=0, NotChecked=0, Total=6642 [2025-03-08 05:43:03,312 INFO L87 Difference]: Start difference. First operand 177 states and 242 transitions. Second operand has 82 states, 64 states have (on average 1.65625) internal successors, (106), 61 states have internal predecessors, (106), 29 states have call successors, (43), 19 states have call predecessors, (43), 40 states have return successors, (54), 41 states have call predecessors, (54), 29 states have call successors, (54) [2025-03-08 05:43:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:18,123 INFO L93 Difference]: Finished difference Result 469 states and 637 transitions. [2025-03-08 05:43:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2025-03-08 05:43:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 64 states have (on average 1.65625) internal successors, (106), 61 states have internal predecessors, (106), 29 states have call successors, (43), 19 states have call predecessors, (43), 40 states have return successors, (54), 41 states have call predecessors, (54), 29 states have call successors, (54) Word has length 184 [2025-03-08 05:43:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:18,127 INFO L225 Difference]: With dead ends: 469 [2025-03-08 05:43:18,127 INFO L226 Difference]: Without dead ends: 465 [2025-03-08 05:43:18,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16616 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=7684, Invalid=49198, Unknown=0, NotChecked=0, Total=56882 [2025-03-08 05:43:18,135 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1772 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 3415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1778 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 6250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3415 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:18,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1778 Valid, 864 Invalid, 6250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3415 Valid, 2835 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-08 05:43:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2025-03-08 05:43:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 431. [2025-03-08 05:43:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 222 states have (on average 1.063063063063063) internal successors, (236), 223 states have internal predecessors, (236), 127 states have call successors, (127), 64 states have call predecessors, (127), 81 states have return successors, (233), 143 states have call predecessors, (233), 127 states have call successors, (233) [2025-03-08 05:43:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 596 transitions. [2025-03-08 05:43:18,192 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 596 transitions. Word has length 184 [2025-03-08 05:43:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:18,192 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 596 transitions. [2025-03-08 05:43:18,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 64 states have (on average 1.65625) internal successors, (106), 61 states have internal predecessors, (106), 29 states have call successors, (43), 19 states have call predecessors, (43), 40 states have return successors, (54), 41 states have call predecessors, (54), 29 states have call successors, (54) [2025-03-08 05:43:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 596 transitions. [2025-03-08 05:43:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2025-03-08 05:43:18,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:18,196 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:18,203 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 05:43:18,397 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 05:43:18,397 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:18,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -438038656, now seen corresponding path program 12 times [2025-03-08 05:43:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:18,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357846626] [2025-03-08 05:43:18,397 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:18,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:18,404 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 190 statements into 27 equivalence classes. [2025-03-08 05:43:18,411 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 92 of 190 statements. [2025-03-08 05:43:18,411 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 05:43:18,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 183 proven. 367 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2025-03-08 05:43:18,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357846626] [2025-03-08 05:43:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357846626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180605254] [2025-03-08 05:43:18,590 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:18,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:18,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:18,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:18,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:43:18,668 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 190 statements into 27 equivalence classes. [2025-03-08 05:43:18,698 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 92 of 190 statements. [2025-03-08 05:43:18,699 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 05:43:18,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:18,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:43:18,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 192 proven. 338 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2025-03-08 05:43:18,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 194 proven. 368 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2025-03-08 05:43:19,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180605254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:19,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:19,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 23] total 30 [2025-03-08 05:43:19,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540438685] [2025-03-08 05:43:19,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:19,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 05:43:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:19,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 05:43:19,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:43:19,823 INFO L87 Difference]: Start difference. First operand 431 states and 596 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 17 states have call successors, (21), 1 states have call predecessors, (21), 13 states have return successors, (29), 14 states have call predecessors, (29), 17 states have call successors, (29) [2025-03-08 05:43:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:20,086 INFO L93 Difference]: Finished difference Result 473 states and 658 transitions. [2025-03-08 05:43:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 05:43:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 17 states have call successors, (21), 1 states have call predecessors, (21), 13 states have return successors, (29), 14 states have call predecessors, (29), 17 states have call successors, (29) Word has length 190 [2025-03-08 05:43:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:20,090 INFO L225 Difference]: With dead ends: 473 [2025-03-08 05:43:20,090 INFO L226 Difference]: Without dead ends: 426 [2025-03-08 05:43:20,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 362 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:43:20,092 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:20,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 367 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2025-03-08 05:43:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 394. [2025-03-08 05:43:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 201 states have (on average 1.0597014925373134) internal successors, (213), 201 states have internal predecessors, (213), 119 states have call successors, (119), 59 states have call predecessors, (119), 73 states have return successors, (219), 133 states have call predecessors, (219), 119 states have call successors, (219) [2025-03-08 05:43:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 551 transitions. [2025-03-08 05:43:20,144 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 551 transitions. Word has length 190 [2025-03-08 05:43:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:20,145 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 551 transitions. [2025-03-08 05:43:20,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 17 states have call successors, (21), 1 states have call predecessors, (21), 13 states have return successors, (29), 14 states have call predecessors, (29), 17 states have call successors, (29) [2025-03-08 05:43:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 551 transitions. [2025-03-08 05:43:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2025-03-08 05:43:20,147 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:20,147 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 24, 23, 23, 23, 23, 23, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:20,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:20,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:20,348 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:20,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:20,348 INFO L85 PathProgramCache]: Analyzing trace with hash -950976913, now seen corresponding path program 13 times [2025-03-08 05:43:20,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:20,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484309173] [2025-03-08 05:43:20,348 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:20,356 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 264 statements into 1 equivalence classes. [2025-03-08 05:43:20,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 264 of 264 statements. [2025-03-08 05:43:20,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:20,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 645 proven. 819 refuted. 0 times theorem prover too weak. 3396 trivial. 0 not checked. [2025-03-08 05:43:20,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:20,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484309173] [2025-03-08 05:43:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484309173] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852507778] [2025-03-08 05:43:20,610 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:20,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:20,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:43:20,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 264 statements into 1 equivalence classes. [2025-03-08 05:43:20,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 264 of 264 statements. [2025-03-08 05:43:20,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:20,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:20,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:43:20,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 645 proven. 819 refuted. 0 times theorem prover too weak. 3396 trivial. 0 not checked. [2025-03-08 05:43:20,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 645 proven. 844 refuted. 0 times theorem prover too weak. 3371 trivial. 0 not checked. [2025-03-08 05:43:22,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852507778] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:22,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:22,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 23 [2025-03-08 05:43:22,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654006611] [2025-03-08 05:43:22,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:22,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:43:22,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:22,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:43:22,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:43:22,088 INFO L87 Difference]: Start difference. First operand 394 states and 551 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 19 states have call successors, (24), 2 states have call predecessors, (24), 11 states have return successors, (30), 10 states have call predecessors, (30), 19 states have call successors, (30) [2025-03-08 05:43:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:22,316 INFO L93 Difference]: Finished difference Result 570 states and 838 transitions. [2025-03-08 05:43:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:43:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 19 states have call successors, (24), 2 states have call predecessors, (24), 11 states have return successors, (30), 10 states have call predecessors, (30), 19 states have call successors, (30) Word has length 264 [2025-03-08 05:43:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:22,320 INFO L225 Difference]: With dead ends: 570 [2025-03-08 05:43:22,320 INFO L226 Difference]: Without dead ends: 464 [2025-03-08 05:43:22,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 516 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:43:22,322 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:22,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 233 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2025-03-08 05:43:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 391. [2025-03-08 05:43:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 200 states have (on average 1.06) internal successors, (212), 200 states have internal predecessors, (212), 119 states have call successors, (119), 60 states have call predecessors, (119), 71 states have return successors, (203), 130 states have call predecessors, (203), 119 states have call successors, (203) [2025-03-08 05:43:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 534 transitions. [2025-03-08 05:43:22,387 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 534 transitions. Word has length 264 [2025-03-08 05:43:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:22,387 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 534 transitions. [2025-03-08 05:43:22,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 19 states have call successors, (24), 2 states have call predecessors, (24), 11 states have return successors, (30), 10 states have call predecessors, (30), 19 states have call successors, (30) [2025-03-08 05:43:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 534 transitions. [2025-03-08 05:43:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2025-03-08 05:43:22,392 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:22,392 INFO L218 NwaCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:22,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:22,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 05:43:22,592 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:22,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1907893393, now seen corresponding path program 14 times [2025-03-08 05:43:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:22,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399625918] [2025-03-08 05:43:22,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:22,605 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 344 statements into 2 equivalence classes. [2025-03-08 05:43:22,632 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 344 of 344 statements. [2025-03-08 05:43:22,632 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:22,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1090 refuted. 0 times theorem prover too weak. 7428 trivial. 0 not checked. [2025-03-08 05:43:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399625918] [2025-03-08 05:43:23,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399625918] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:23,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375613263] [2025-03-08 05:43:23,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:23,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:23,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:23,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:43:23,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 344 statements into 2 equivalence classes. [2025-03-08 05:43:23,303 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 344 of 344 statements. [2025-03-08 05:43:23,303 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:23,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:23,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:43:23,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2025-03-08 05:43:23,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2025-03-08 05:43:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375613263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:24,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:24,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 27 [2025-03-08 05:43:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811155550] [2025-03-08 05:43:24,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:24,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:43:24,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:24,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:43:24,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:43:24,691 INFO L87 Difference]: Start difference. First operand 391 states and 534 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 17 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-08 05:43:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:24,905 INFO L93 Difference]: Finished difference Result 424 states and 567 transitions. [2025-03-08 05:43:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:43:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 17 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 344 [2025-03-08 05:43:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:24,909 INFO L225 Difference]: With dead ends: 424 [2025-03-08 05:43:24,909 INFO L226 Difference]: Without dead ends: 420 [2025-03-08 05:43:24,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 673 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:43:24,909 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:24,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 208 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:43:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2025-03-08 05:43:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 394. [2025-03-08 05:43:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 202 states have (on average 1.0594059405940595) internal successors, (214), 202 states have internal predecessors, (214), 119 states have call successors, (119), 60 states have call predecessors, (119), 72 states have return successors, (204), 131 states have call predecessors, (204), 119 states have call successors, (204) [2025-03-08 05:43:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 537 transitions. [2025-03-08 05:43:24,961 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 537 transitions. Word has length 344 [2025-03-08 05:43:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:24,962 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 537 transitions. [2025-03-08 05:43:24,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 17 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2025-03-08 05:43:24,962 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 537 transitions. [2025-03-08 05:43:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2025-03-08 05:43:24,965 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:24,965 INFO L218 NwaCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:24,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:25,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 05:43:25,165 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:25,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash 344670592, now seen corresponding path program 15 times [2025-03-08 05:43:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177615782] [2025-03-08 05:43:25,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:25,176 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 350 statements into 56 equivalence classes. [2025-03-08 05:43:25,252 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) and asserted 348 of 350 statements. [2025-03-08 05:43:25,253 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) [2025-03-08 05:43:25,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 154 proven. 2940 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2025-03-08 05:43:28,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:28,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177615782] [2025-03-08 05:43:28,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177615782] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:28,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858849949] [2025-03-08 05:43:28,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:28,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:28,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:28,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:43:28,337 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 350 statements into 56 equivalence classes. [2025-03-08 05:43:28,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) and asserted 348 of 350 statements. [2025-03-08 05:43:28,560 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) [2025-03-08 05:43:28,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:28,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 339 conjuncts are in the unsatisfiable core [2025-03-08 05:43:28,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2025-03-08 05:43:29,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2025-03-08 05:43:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858849949] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:34,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 108] total 139 [2025-03-08 05:43:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641257824] [2025-03-08 05:43:34,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:34,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2025-03-08 05:43:34,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:34,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2025-03-08 05:43:34,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=18689, Unknown=0, NotChecked=0, Total=19182 [2025-03-08 05:43:34,847 INFO L87 Difference]: Start difference. First operand 394 states and 537 transitions. Second operand has 139 states, 104 states have (on average 1.7211538461538463) internal successors, (179), 106 states have internal predecessors, (179), 54 states have call successors, (77), 36 states have call predecessors, (77), 68 states have return successors, (91), 70 states have call predecessors, (91), 54 states have call successors, (91)