./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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/Ackermann01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 02:39:10,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 02:39:10,414 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-09 02:39:10,418 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 02:39:10,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 02:39:10,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 02:39:10,436 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 02:39:10,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 02:39:10,436 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 02:39:10,436 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 02:39:10,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 02:39:10,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 02:39:10,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 02:39:10,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 02:39:10,437 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 02:39:10,437 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 02:39:10,437 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-09 02:39:10,437 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 02:39:10,437 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 02:39:10,437 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 02:39:10,439 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 02:39:10,439 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-09 02:39:10,440 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 02:39:10,440 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-09 02:39:10,440 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-09 02:39:10,440 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 02:39:10,440 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 02:39:10,440 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-09 02:39:10,441 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 02:39:10,441 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 02:39:10,441 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 02:39:10,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 02:39:10,441 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 02:39:10,441 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 02:39:10,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 02:39:10,442 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 02:39:10,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 02:39:10,442 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 ! overflow) ) 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 -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2025-03-09 02:39:10,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 02:39:10,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 02:39:10,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 02:39:10,662 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 02:39:10,662 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 02:39:10,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann01-2.c [2025-03-09 02:39:11,872 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3566110bd/440d073f4d754aa2804013ed2da624bd/FLAGe2acfc955 [2025-03-09 02:39:12,081 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 02:39:12,081 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c [2025-03-09 02:39:12,086 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3566110bd/440d073f4d754aa2804013ed2da624bd/FLAGe2acfc955 [2025-03-09 02:39:12,442 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3566110bd/440d073f4d754aa2804013ed2da624bd [2025-03-09 02:39:12,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 02:39:12,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 02:39:12,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 02:39:12,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 02:39:12,449 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 02:39:12,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5c60b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12, skipping insertion in model container [2025-03-09 02:39:12,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,459 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 02:39:12,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 02:39:12,574 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 02:39:12,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 02:39:12,598 INFO L204 MainTranslator]: Completed translation [2025-03-09 02:39:12,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12 WrapperNode [2025-03-09 02:39:12,599 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 02:39:12,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 02:39:12,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 02:39:12,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 02:39:12,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,621 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2025-03-09 02:39:12,621 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 02:39:12,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 02:39:12,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 02:39:12,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 02:39:12,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,631 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,646 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]. [2025-03-09 02:39:12,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,649 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 02:39:12,654 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 02:39:12,654 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 02:39:12,654 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 02:39:12,655 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (1/1) ... [2025-03-09 02:39:12,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 02:39:12,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:12,689 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) [2025-03-09 02:39:12,698 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 [2025-03-09 02:39:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 02:39:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 02:39:12,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 02:39:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-03-09 02:39:12,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-03-09 02:39:12,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 02:39:12,754 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 02:39:12,755 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 02:39:12,860 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret5;havoc #t~ret6; [2025-03-09 02:39:12,861 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4; [2025-03-09 02:39:12,867 INFO L? ?]: Removed 21 outVars from TransFormulas that were not future-live. [2025-03-09 02:39:12,868 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 02:39:12,874 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 02:39:12,874 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 02:39:12,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 02:39:12 BoogieIcfgContainer [2025-03-09 02:39:12,875 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 02:39:12,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 02:39:12,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 02:39:12,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 02:39:12,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 02:39:12" (1/3) ... [2025-03-09 02:39:12,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1843cdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 02:39:12, skipping insertion in model container [2025-03-09 02:39:12,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:12" (2/3) ... [2025-03-09 02:39:12,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1843cdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 02:39:12, skipping insertion in model container [2025-03-09 02:39:12,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 02:39:12" (3/3) ... [2025-03-09 02:39:12,881 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2025-03-09 02:39:12,899 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 02:39:12,901 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann01-2.c that has 2 procedures, 39 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2025-03-09 02:39:12,945 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 02:39:12,954 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;@1d1f4d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 02:39:12,954 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-09 02:39:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-09 02:39:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-09 02:39:12,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:12,961 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:12,961 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:12,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -489113992, now seen corresponding path program 1 times [2025-03-09 02:39:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154181400] [2025-03-09 02:39:12,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 02:39:13,035 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 02:39:13,035 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:13,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154181400] [2025-03-09 02:39:13,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154181400] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:13,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:13,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:13,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098325214] [2025-03-09 02:39:13,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:13,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:13,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:13,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:13,141 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:13,275 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2025-03-09 02:39:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-09 02:39:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:13,281 INFO L225 Difference]: With dead ends: 71 [2025-03-09 02:39:13,281 INFO L226 Difference]: Without dead ends: 59 [2025-03-09 02:39:13,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 02:39:13,285 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:13,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-09 02:39:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2025-03-09 02:39:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-09 02:39:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2025-03-09 02:39:13,322 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2025-03-09 02:39:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:13,322 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2025-03-09 02:39:13,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2025-03-09 02:39:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-09 02:39:13,322 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,322 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 02:39:13,323 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2017335443, now seen corresponding path program 1 times [2025-03-09 02:39:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094530614] [2025-03-09 02:39:13,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 02:39:13,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 02:39:13,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:13,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094530614] [2025-03-09 02:39:13,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094530614] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:13,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:13,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569900822] [2025-03-09 02:39:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:13,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:13,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:13,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:13,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:13,369 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:13,458 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2025-03-09 02:39:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:13,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-09 02:39:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:13,459 INFO L225 Difference]: With dead ends: 82 [2025-03-09 02:39:13,459 INFO L226 Difference]: Without dead ends: 80 [2025-03-09 02:39:13,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 02:39:13,460 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:13,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 100 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-09 02:39:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2025-03-09 02:39:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.489795918367347) internal successors, (73), 57 states have internal predecessors, (73), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-09 02:39:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2025-03-09 02:39:13,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 9 [2025-03-09 02:39:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:13,469 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2025-03-09 02:39:13,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2025-03-09 02:39:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-09 02:39:13,470 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,470 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 02:39:13,470 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2017336276, now seen corresponding path program 1 times [2025-03-09 02:39:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161481311] [2025-03-09 02:39:13,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 02:39:13,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 02:39:13,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:13,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161481311] [2025-03-09 02:39:13,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161481311] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:13,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:13,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263665382] [2025-03-09 02:39:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:13,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:13,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:13,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:13,528 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:13,607 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2025-03-09 02:39:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-09 02:39:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:13,609 INFO L225 Difference]: With dead ends: 118 [2025-03-09 02:39:13,612 INFO L226 Difference]: Without dead ends: 108 [2025-03-09 02:39:13,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 02:39:13,613 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:13,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 101 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-09 02:39:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2025-03-09 02:39:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-09 02:39:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2025-03-09 02:39:13,635 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2025-03-09 02:39:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:13,635 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2025-03-09 02:39:13,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2025-03-09 02:39:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-09 02:39:13,636 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,636 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 02:39:13,637 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1887084879, now seen corresponding path program 1 times [2025-03-09 02:39:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176878142] [2025-03-09 02:39:13,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 02:39:13,647 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 02:39:13,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:13,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176878142] [2025-03-09 02:39:13,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176878142] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:13,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:13,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:13,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574328371] [2025-03-09 02:39:13,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:13,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:13,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:13,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:13,701 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:13,766 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2025-03-09 02:39:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-09 02:39:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:13,768 INFO L225 Difference]: With dead ends: 110 [2025-03-09 02:39:13,769 INFO L226 Difference]: Without dead ends: 108 [2025-03-09 02:39:13,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 02:39:13,770 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:13,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 02:39:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-09 02:39:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2025-03-09 02:39:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-09 02:39:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2025-03-09 02:39:13,783 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2025-03-09 02:39:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:13,784 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2025-03-09 02:39:13,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2025-03-09 02:39:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-09 02:39:13,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,784 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 02:39:13,784 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash -224957691, now seen corresponding path program 1 times [2025-03-09 02:39:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171722752] [2025-03-09 02:39:13,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 02:39:13,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 02:39:13,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:13,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171722752] [2025-03-09 02:39:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171722752] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:13,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024663585] [2025-03-09 02:39:13,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:13,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 02:39:13,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:13,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 02:39:13,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 02:39:13,838 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:13,879 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2025-03-09 02:39:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 02:39:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-09 02:39:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:13,881 INFO L225 Difference]: With dead ends: 170 [2025-03-09 02:39:13,881 INFO L226 Difference]: Without dead ends: 99 [2025-03-09 02:39:13,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:13,882 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:13,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 02:39:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-09 02:39:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2025-03-09 02:39:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-09 02:39:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2025-03-09 02:39:13,894 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2025-03-09 02:39:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:13,894 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2025-03-09 02:39:13,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2025-03-09 02:39:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-09 02:39:13,894 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,894 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-09 02:39:13,896 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -224957667, now seen corresponding path program 1 times [2025-03-09 02:39:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540921259] [2025-03-09 02:39:13,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 02:39:13,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 02:39:13,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:13,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540921259] [2025-03-09 02:39:13,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540921259] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:13,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789253885] [2025-03-09 02:39:13,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:13,957 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) [2025-03-09 02:39:13,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 02:39:13,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 02:39:13,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 02:39:13,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 02:39:13,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:14,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:14,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789253885] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:14,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:14,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-09 02:39:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129656970] [2025-03-09 02:39:14,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 02:39:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 02:39:14,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-09 02:39:14,113 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,345 INFO L93 Difference]: Finished difference Result 276 states and 359 transitions. [2025-03-09 02:39:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 02:39:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-09 02:39:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,347 INFO L225 Difference]: With dead ends: 276 [2025-03-09 02:39:14,347 INFO L226 Difference]: Without dead ends: 274 [2025-03-09 02:39:14,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-09 02:39:14,348 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 171 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:14,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 219 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-03-09 02:39:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 236. [2025-03-09 02:39:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2025-03-09 02:39:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2025-03-09 02:39:14,383 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2025-03-09 02:39:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:14,383 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2025-03-09 02:39:14,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2025-03-09 02:39:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-09 02:39:14,384 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:14,384 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:14,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 02:39:14,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-09 02:39:14,585 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:14,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2020160200, now seen corresponding path program 1 times [2025-03-09 02:39:14,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:14,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533513397] [2025-03-09 02:39:14,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:14,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 02:39:14,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 02:39:14,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:14,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533513397] [2025-03-09 02:39:14,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533513397] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841413301] [2025-03-09 02:39:14,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:14,666 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) [2025-03-09 02:39:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 02:39:14,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 02:39:14,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 02:39:14,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 02:39:14,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:14,722 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 02:39:14,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841413301] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:14,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 02:39:14,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2025-03-09 02:39:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764362843] [2025-03-09 02:39:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:14,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-09 02:39:14,724 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,805 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2025-03-09 02:39:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 02:39:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-09 02:39:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,808 INFO L225 Difference]: With dead ends: 328 [2025-03-09 02:39:14,808 INFO L226 Difference]: Without dead ends: 327 [2025-03-09 02:39:14,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-09 02:39:14,809 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:14,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 90 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 02:39:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-09 02:39:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2025-03-09 02:39:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-09 02:39:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2025-03-09 02:39:14,834 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2025-03-09 02:39:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:14,834 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2025-03-09 02:39:14,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2025-03-09 02:39:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-09 02:39:14,835 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:14,835 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:14,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:15,035 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,SelfDestructingSolverStorable6 [2025-03-09 02:39:15,035 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:15,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1511600730, now seen corresponding path program 1 times [2025-03-09 02:39:15,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:15,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578965985] [2025-03-09 02:39:15,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:15,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 02:39:15,041 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 02:39:15,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:15,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578965985] [2025-03-09 02:39:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578965985] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:15,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862005562] [2025-03-09 02:39:15,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:15,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:15,092 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) [2025-03-09 02:39:15,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 02:39:15,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 02:39:15,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 02:39:15,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 02:39:15,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:15,144 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862005562] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:15,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-09 02:39:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735810377] [2025-03-09 02:39:15,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:15,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 02:39:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:15,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 02:39:15,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-09 02:39:15,198 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:15,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:15,389 INFO L93 Difference]: Finished difference Result 577 states and 766 transitions. [2025-03-09 02:39:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 02:39:15,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-09 02:39:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:15,392 INFO L225 Difference]: With dead ends: 577 [2025-03-09 02:39:15,393 INFO L226 Difference]: Without dead ends: 576 [2025-03-09 02:39:15,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-09 02:39:15,393 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 169 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:15,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 183 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2025-03-09 02:39:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 521. [2025-03-09 02:39:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2025-03-09 02:39:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2025-03-09 02:39:15,435 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2025-03-09 02:39:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:15,435 INFO L471 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2025-03-09 02:39:15,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2025-03-09 02:39:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-09 02:39:15,438 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:15,438 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:15,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:15,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:15,639 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:15,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1980210359, now seen corresponding path program 1 times [2025-03-09 02:39:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041249239] [2025-03-09 02:39:15,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:15,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 02:39:15,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 02:39:15,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 02:39:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041249239] [2025-03-09 02:39:15,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041249239] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87817619] [2025-03-09 02:39:15,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:15,736 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) [2025-03-09 02:39:15,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 02:39:15,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 02:39:15,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 02:39:15,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 02:39:15,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 02:39:15,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 02:39:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87817619] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:15,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:15,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-09 02:39:15,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984839137] [2025-03-09 02:39:15,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:15,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 02:39:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:15,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 02:39:15,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2025-03-09 02:39:15,902 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 02:39:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:16,350 INFO L93 Difference]: Finished difference Result 1306 states and 1818 transitions. [2025-03-09 02:39:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-09 02:39:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-03-09 02:39:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:16,355 INFO L225 Difference]: With dead ends: 1306 [2025-03-09 02:39:16,355 INFO L226 Difference]: Without dead ends: 915 [2025-03-09 02:39:16,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2025-03-09 02:39:16,359 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:16,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 105 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2025-03-09 02:39:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 715. [2025-03-09 02:39:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 560 states have (on average 1.1982142857142857) internal successors, (671), 581 states have internal predecessors, (671), 103 states have call successors, (103), 47 states have call predecessors, (103), 46 states have return successors, (106), 86 states have call predecessors, (106), 78 states have call successors, (106) [2025-03-09 02:39:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 880 transitions. [2025-03-09 02:39:16,438 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 880 transitions. Word has length 24 [2025-03-09 02:39:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:16,438 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 880 transitions. [2025-03-09 02:39:16,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 02:39:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 880 transitions. [2025-03-09 02:39:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-09 02:39:16,440 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:16,440 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:16,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 02:39:16,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:16,641 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:16,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1184768225, now seen corresponding path program 1 times [2025-03-09 02:39:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230937199] [2025-03-09 02:39:16,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:16,645 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-09 02:39:16,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-09 02:39:16,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:16,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-09 02:39:16,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:16,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230937199] [2025-03-09 02:39:16,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230937199] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:16,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107250412] [2025-03-09 02:39:16,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:16,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:16,722 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) [2025-03-09 02:39:16,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 02:39:16,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-09 02:39:16,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-09 02:39:16,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:16,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:16,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 02:39:16,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 02:39:16,788 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 02:39:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107250412] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:16,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 02:39:16,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2025-03-09 02:39:16,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800016264] [2025-03-09 02:39:16,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:16,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:16,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:16,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-09 02:39:16,790 INFO L87 Difference]: Start difference. First operand 715 states and 880 transitions. Second operand has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-09 02:39:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:16,911 INFO L93 Difference]: Finished difference Result 762 states and 976 transitions. [2025-03-09 02:39:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 02:39:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2025-03-09 02:39:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:16,918 INFO L225 Difference]: With dead ends: 762 [2025-03-09 02:39:16,918 INFO L226 Difference]: Without dead ends: 761 [2025-03-09 02:39:16,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-03-09 02:39:16,919 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:16,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 110 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 02:39:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2025-03-09 02:39:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 686. [2025-03-09 02:39:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 534 states have (on average 1.1779026217228465) internal successors, (629), 556 states have internal predecessors, (629), 101 states have call successors, (101), 43 states have call predecessors, (101), 46 states have return successors, (106), 86 states have call predecessors, (106), 78 states have call successors, (106) [2025-03-09 02:39:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 836 transitions. [2025-03-09 02:39:16,988 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 836 transitions. Word has length 28 [2025-03-09 02:39:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:16,988 INFO L471 AbstractCegarLoop]: Abstraction has 686 states and 836 transitions. [2025-03-09 02:39:16,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-09 02:39:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 836 transitions. [2025-03-09 02:39:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-09 02:39:16,990 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:16,990 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:16,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-09 02:39:17,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-09 02:39:17,195 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:17,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1930986427, now seen corresponding path program 1 times [2025-03-09 02:39:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179228089] [2025-03-09 02:39:17,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:17,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:17,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 02:39:17,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 02:39:17,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:17,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179228089] [2025-03-09 02:39:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179228089] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015657092] [2025-03-09 02:39:17,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:17,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:17,298 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) [2025-03-09 02:39:17,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 02:39:17,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 02:39:17,333 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 02:39:17,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:17,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:17,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:17,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:17,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015657092] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:17,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 02:39:17,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-09 02:39:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757649580] [2025-03-09 02:39:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:17,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 02:39:17,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:17,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 02:39:17,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:17,554 INFO L87 Difference]: Start difference. First operand 686 states and 836 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-09 02:39:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:17,753 INFO L93 Difference]: Finished difference Result 793 states and 1000 transitions. [2025-03-09 02:39:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 02:39:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2025-03-09 02:39:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:17,757 INFO L225 Difference]: With dead ends: 793 [2025-03-09 02:39:17,758 INFO L226 Difference]: Without dead ends: 792 [2025-03-09 02:39:17,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-03-09 02:39:17,758 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:17,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 159 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2025-03-09 02:39:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 685. [2025-03-09 02:39:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 534 states have (on average 1.1704119850187267) internal successors, (625), 555 states have internal predecessors, (625), 101 states have call successors, (101), 43 states have call predecessors, (101), 46 states have return successors, (106), 86 states have call predecessors, (106), 78 states have call successors, (106) [2025-03-09 02:39:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 832 transitions. [2025-03-09 02:39:17,801 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 832 transitions. Word has length 33 [2025-03-09 02:39:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:17,801 INFO L471 AbstractCegarLoop]: Abstraction has 685 states and 832 transitions. [2025-03-09 02:39:17,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-09 02:39:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 832 transitions. [2025-03-09 02:39:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-09 02:39:17,801 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:17,802 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:17,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-09 02:39:18,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:18,002 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:18,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash 268962918, now seen corresponding path program 1 times [2025-03-09 02:39:18,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:18,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144003305] [2025-03-09 02:39:18,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:18,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:18,005 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-09 02:39:18,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-09 02:39:18,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:18,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:18,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:18,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144003305] [2025-03-09 02:39:18,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144003305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:18,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31864552] [2025-03-09 02:39:18,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:18,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:18,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:18,091 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) [2025-03-09 02:39:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 02:39:18,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-09 02:39:18,121 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-09 02:39:18,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:18,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:18,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:18,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:18,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31864552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:18,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-09 02:39:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347261367] [2025-03-09 02:39:18,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:18,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 02:39:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:18,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 02:39:18,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:18,308 INFO L87 Difference]: Start difference. First operand 685 states and 832 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-09 02:39:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:18,746 INFO L93 Difference]: Finished difference Result 1135 states and 1689 transitions. [2025-03-09 02:39:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 02:39:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2025-03-09 02:39:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:18,752 INFO L225 Difference]: With dead ends: 1135 [2025-03-09 02:39:18,752 INFO L226 Difference]: Without dead ends: 1134 [2025-03-09 02:39:18,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2025-03-09 02:39:18,754 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:18,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 236 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2025-03-09 02:39:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 945. [2025-03-09 02:39:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 705 states have (on average 1.1602836879432623) internal successors, (818), 740 states have internal predecessors, (818), 150 states have call successors, (150), 50 states have call predecessors, (150), 86 states have return successors, (301), 154 states have call predecessors, (301), 126 states have call successors, (301) [2025-03-09 02:39:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1269 transitions. [2025-03-09 02:39:18,829 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1269 transitions. Word has length 34 [2025-03-09 02:39:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:18,830 INFO L471 AbstractCegarLoop]: Abstraction has 945 states and 1269 transitions. [2025-03-09 02:39:18,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-09 02:39:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1269 transitions. [2025-03-09 02:39:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-09 02:39:18,831 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:18,831 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:18,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 02:39:19,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:19,032 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:19,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash -54654743, now seen corresponding path program 1 times [2025-03-09 02:39:19,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:19,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539353533] [2025-03-09 02:39:19,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:19,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:19,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-09 02:39:19,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 02:39:19,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:19,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 02:39:19,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:19,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539353533] [2025-03-09 02:39:19,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539353533] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:19,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322293953] [2025-03-09 02:39:19,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:19,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:19,122 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) [2025-03-09 02:39:19,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 02:39:19,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-09 02:39:19,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 02:39:19,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:19,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:19,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 02:39:19,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 02:39:19,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 02:39:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322293953] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:19,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:19,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-09 02:39:19,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796608445] [2025-03-09 02:39:19,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:19,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 02:39:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:19,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 02:39:19,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:19,330 INFO L87 Difference]: Start difference. First operand 945 states and 1269 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 02:39:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:19,723 INFO L93 Difference]: Finished difference Result 1154 states and 1562 transitions. [2025-03-09 02:39:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-09 02:39:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2025-03-09 02:39:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:19,731 INFO L225 Difference]: With dead ends: 1154 [2025-03-09 02:39:19,731 INFO L226 Difference]: Without dead ends: 1153 [2025-03-09 02:39:19,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2025-03-09 02:39:19,732 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 188 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:19,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 215 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2025-03-09 02:39:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 986. [2025-03-09 02:39:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 739 states have (on average 1.1610284167794316) internal successors, (858), 771 states have internal predecessors, (858), 157 states have call successors, (157), 56 states have call predecessors, (157), 86 states have return successors, (301), 158 states have call predecessors, (301), 126 states have call successors, (301) [2025-03-09 02:39:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1316 transitions. [2025-03-09 02:39:19,800 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1316 transitions. Word has length 35 [2025-03-09 02:39:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:19,800 INFO L471 AbstractCegarLoop]: Abstraction has 986 states and 1316 transitions. [2025-03-09 02:39:19,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 02:39:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1316 transitions. [2025-03-09 02:39:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-09 02:39:19,802 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:19,802 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:19,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:20,006 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,SelfDestructingSolverStorable12 [2025-03-09 02:39:20,006 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:20,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash 776149949, now seen corresponding path program 1 times [2025-03-09 02:39:20,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:20,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827854864] [2025-03-09 02:39:20,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:20,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:20,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-09 02:39:20,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-09 02:39:20,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:20,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:20,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:20,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827854864] [2025-03-09 02:39:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827854864] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916557809] [2025-03-09 02:39:20,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:20,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:20,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:20,080 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) [2025-03-09 02:39:20,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 02:39:20,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-09 02:39:20,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-09 02:39:20,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:20,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:20,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:20,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:20,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916557809] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:20,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 02:39:20,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-09 02:39:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809562250] [2025-03-09 02:39:20,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:20,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 02:39:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:20,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 02:39:20,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:20,293 INFO L87 Difference]: Start difference. First operand 986 states and 1316 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-09 02:39:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:20,516 INFO L93 Difference]: Finished difference Result 1136 states and 1594 transitions. [2025-03-09 02:39:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-09 02:39:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2025-03-09 02:39:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:20,521 INFO L225 Difference]: With dead ends: 1136 [2025-03-09 02:39:20,522 INFO L226 Difference]: Without dead ends: 1135 [2025-03-09 02:39:20,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2025-03-09 02:39:20,523 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:20,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 183 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2025-03-09 02:39:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 994. [2025-03-09 02:39:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 747 states have (on average 1.1552878179384203) internal successors, (863), 775 states have internal predecessors, (863), 161 states have call successors, (161), 56 states have call predecessors, (161), 82 states have return successors, (241), 162 states have call predecessors, (241), 130 states have call successors, (241) [2025-03-09 02:39:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1265 transitions. [2025-03-09 02:39:20,607 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1265 transitions. Word has length 36 [2025-03-09 02:39:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:20,607 INFO L471 AbstractCegarLoop]: Abstraction has 994 states and 1265 transitions. [2025-03-09 02:39:20,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-09 02:39:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1265 transitions. [2025-03-09 02:39:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-09 02:39:20,609 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:20,609 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:20,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 02:39:20,809 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,SelfDestructingSolverStorable13 [2025-03-09 02:39:20,810 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:20,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1235994774, now seen corresponding path program 2 times [2025-03-09 02:39:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889063466] [2025-03-09 02:39:20,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:20,813 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 02:39:20,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 02:39:20,817 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:20,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:20,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889063466] [2025-03-09 02:39:20,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889063466] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984642388] [2025-03-09 02:39:20,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:20,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:20,911 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) [2025-03-09 02:39:20,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 02:39:20,931 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 02:39:20,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 02:39:20,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:20,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:20,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 02:39:20,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:20,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:39:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984642388] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:21,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:21,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-09 02:39:21,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685376861] [2025-03-09 02:39:21,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:21,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 02:39:21,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:21,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 02:39:21,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-09 02:39:21,125 INFO L87 Difference]: Start difference. First operand 994 states and 1265 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:21,549 INFO L93 Difference]: Finished difference Result 1989 states and 2570 transitions. [2025-03-09 02:39:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-09 02:39:21,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-09 02:39:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:21,556 INFO L225 Difference]: With dead ends: 1989 [2025-03-09 02:39:21,556 INFO L226 Difference]: Without dead ends: 1988 [2025-03-09 02:39:21,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2025-03-09 02:39:21,557 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 515 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:21,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 305 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2025-03-09 02:39:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1709. [2025-03-09 02:39:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1282 states have (on average 1.1365054602184088) internal successors, (1457), 1336 states have internal predecessors, (1457), 269 states have call successors, (269), 90 states have call predecessors, (269), 154 states have return successors, (409), 282 states have call predecessors, (409), 226 states have call successors, (409) [2025-03-09 02:39:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2135 transitions. [2025-03-09 02:39:21,682 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2135 transitions. Word has length 43 [2025-03-09 02:39:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:21,682 INFO L471 AbstractCegarLoop]: Abstraction has 1709 states and 2135 transitions. [2025-03-09 02:39:21,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2135 transitions. [2025-03-09 02:39:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-09 02:39:21,684 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:21,684 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:21,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 02:39:21,888 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,SelfDestructingSolverStorable14 [2025-03-09 02:39:21,888 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:21,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1489943149, now seen corresponding path program 2 times [2025-03-09 02:39:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806487422] [2025-03-09 02:39:21,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:21,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-09 02:39:21,895 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-09 02:39:21,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:21,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806487422] [2025-03-09 02:39:21,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806487422] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675154174] [2025-03-09 02:39:21,990 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:21,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:21,992 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) [2025-03-09 02:39:21,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 02:39:22,014 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-09 02:39:22,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-09 02:39:22,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:22,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:22,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-09 02:39:22,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:22,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675154174] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:22,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:22,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2025-03-09 02:39:22,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453576316] [2025-03-09 02:39:22,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:22,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 02:39:22,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:22,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 02:39:22,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-09 02:39:22,270 INFO L87 Difference]: Start difference. First operand 1709 states and 2135 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-09 02:39:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:23,067 INFO L93 Difference]: Finished difference Result 3697 states and 5359 transitions. [2025-03-09 02:39:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-09 02:39:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2025-03-09 02:39:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:23,078 INFO L225 Difference]: With dead ends: 3697 [2025-03-09 02:39:23,079 INFO L226 Difference]: Without dead ends: 2573 [2025-03-09 02:39:23,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2025-03-09 02:39:23,086 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 181 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:23,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 321 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:39:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2025-03-09 02:39:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1888. [2025-03-09 02:39:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1419 states have (on average 1.1310782241014798) internal successors, (1605), 1479 states have internal predecessors, (1605), 293 states have call successors, (293), 104 states have call predecessors, (293), 172 states have return successors, (443), 304 states have call predecessors, (443), 245 states have call successors, (443) [2025-03-09 02:39:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2341 transitions. [2025-03-09 02:39:23,234 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2341 transitions. Word has length 44 [2025-03-09 02:39:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:23,235 INFO L471 AbstractCegarLoop]: Abstraction has 1888 states and 2341 transitions. [2025-03-09 02:39:23,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-09 02:39:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2341 transitions. [2025-03-09 02:39:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-09 02:39:23,263 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:23,263 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:23,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 02:39:23,463 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,SelfDestructingSolverStorable15 [2025-03-09 02:39:23,464 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:23,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -460172098, now seen corresponding path program 1 times [2025-03-09 02:39:23,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089150703] [2025-03-09 02:39:23,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:23,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:23,468 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-09 02:39:23,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:23,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:23,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-09 02:39:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089150703] [2025-03-09 02:39:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089150703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738839555] [2025-03-09 02:39:23,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:23,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:23,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:23,538 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) [2025-03-09 02:39:23,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 02:39:23,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-09 02:39:23,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:23,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:23,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:23,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:23,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-09 02:39:23,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-09 02:39:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738839555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:23,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:23,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2025-03-09 02:39:23,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107759592] [2025-03-09 02:39:23,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:23,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 02:39:23,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:23,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 02:39:23,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-09 02:39:23,674 INFO L87 Difference]: Start difference. First operand 1888 states and 2341 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-09 02:39:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:23,900 INFO L93 Difference]: Finished difference Result 2110 states and 2763 transitions. [2025-03-09 02:39:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 02:39:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2025-03-09 02:39:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:23,907 INFO L225 Difference]: With dead ends: 2110 [2025-03-09 02:39:23,907 INFO L226 Difference]: Without dead ends: 2010 [2025-03-09 02:39:23,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-03-09 02:39:23,909 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:23,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 129 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2025-03-09 02:39:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1894. [2025-03-09 02:39:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1425 states have (on average 1.1298245614035087) internal successors, (1610), 1483 states have internal predecessors, (1610), 293 states have call successors, (293), 106 states have call predecessors, (293), 172 states have return successors, (443), 304 states have call predecessors, (443), 245 states have call successors, (443) [2025-03-09 02:39:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2346 transitions. [2025-03-09 02:39:24,060 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2346 transitions. Word has length 51 [2025-03-09 02:39:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:24,060 INFO L471 AbstractCegarLoop]: Abstraction has 1894 states and 2346 transitions. [2025-03-09 02:39:24,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-09 02:39:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2346 transitions. [2025-03-09 02:39:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-09 02:39:24,062 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:24,062 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:24,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-09 02:39:24,263 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,SelfDestructingSolverStorable16 [2025-03-09 02:39:24,263 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:24,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash -682664631, now seen corresponding path program 2 times [2025-03-09 02:39:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126470310] [2025-03-09 02:39:24,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:24,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:24,267 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-09 02:39:24,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:24,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:24,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 02:39:24,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:24,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126470310] [2025-03-09 02:39:24,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126470310] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315135374] [2025-03-09 02:39:24,394 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:24,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:24,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:24,395 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) [2025-03-09 02:39:24,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 02:39:24,419 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-09 02:39:24,429 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:24,430 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:24,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:24,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 02:39:24,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 02:39:24,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 02:39:24,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315135374] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:24,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:24,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-09 02:39:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146214378] [2025-03-09 02:39:24,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:24,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 02:39:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:24,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 02:39:24,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-09 02:39:24,669 INFO L87 Difference]: Start difference. First operand 1894 states and 2346 transitions. Second operand has 26 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 02:39:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:25,352 INFO L93 Difference]: Finished difference Result 2409 states and 3101 transitions. [2025-03-09 02:39:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-09 02:39:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2025-03-09 02:39:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:25,368 INFO L225 Difference]: With dead ends: 2409 [2025-03-09 02:39:25,368 INFO L226 Difference]: Without dead ends: 2408 [2025-03-09 02:39:25,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=1937, Unknown=0, NotChecked=0, Total=2450 [2025-03-09 02:39:25,370 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 369 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:25,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 306 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2025-03-09 02:39:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1937. [2025-03-09 02:39:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1459 states have (on average 1.1309115832762167) internal successors, (1650), 1515 states have internal predecessors, (1650), 302 states have call successors, (302), 111 states have call predecessors, (302), 172 states have return successors, (443), 310 states have call predecessors, (443), 245 states have call successors, (443) [2025-03-09 02:39:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2395 transitions. [2025-03-09 02:39:25,526 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2395 transitions. Word has length 51 [2025-03-09 02:39:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:25,526 INFO L471 AbstractCegarLoop]: Abstraction has 1937 states and 2395 transitions. [2025-03-09 02:39:25,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 02:39:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2395 transitions. [2025-03-09 02:39:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-09 02:39:25,528 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:25,528 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:25,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 02:39:25,729 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,SelfDestructingSolverStorable17 [2025-03-09 02:39:25,729 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:25,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:25,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1951011931, now seen corresponding path program 1 times [2025-03-09 02:39:25,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:25,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037389910] [2025-03-09 02:39:25,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:25,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:25,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-09 02:39:25,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 02:39:25,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:25,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-09 02:39:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037389910] [2025-03-09 02:39:25,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037389910] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296859504] [2025-03-09 02:39:25,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:25,858 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) [2025-03-09 02:39:25,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 02:39:25,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-09 02:39:25,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 02:39:25,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:25,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:25,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 02:39:25,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-09 02:39:25,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-09 02:39:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296859504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:26,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-09 02:39:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884440920] [2025-03-09 02:39:26,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:26,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 02:39:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:26,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 02:39:26,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2025-03-09 02:39:26,271 INFO L87 Difference]: Start difference. First operand 1937 states and 2395 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-09 02:39:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:27,798 INFO L93 Difference]: Finished difference Result 4673 states and 8176 transitions. [2025-03-09 02:39:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-09 02:39:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2025-03-09 02:39:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:27,819 INFO L225 Difference]: With dead ends: 4673 [2025-03-09 02:39:27,819 INFO L226 Difference]: Without dead ends: 4672 [2025-03-09 02:39:27,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1475, Invalid=7081, Unknown=0, NotChecked=0, Total=8556 [2025-03-09 02:39:27,824 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:27,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 246 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:39:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2025-03-09 02:39:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 3296. [2025-03-09 02:39:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 2306 states have (on average 1.1019080659150042) internal successors, (2541), 2372 states have internal predecessors, (2541), 581 states have call successors, (581), 125 states have call predecessors, (581), 405 states have return successors, (2934), 798 states have call predecessors, (2934), 522 states have call successors, (2934) [2025-03-09 02:39:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 6056 transitions. [2025-03-09 02:39:28,187 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 6056 transitions. Word has length 53 [2025-03-09 02:39:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:28,187 INFO L471 AbstractCegarLoop]: Abstraction has 3296 states and 6056 transitions. [2025-03-09 02:39:28,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-09 02:39:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 6056 transitions. [2025-03-09 02:39:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-09 02:39:28,189 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:28,189 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:28,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-09 02:39:28,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:28,393 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:28,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1491656896, now seen corresponding path program 1 times [2025-03-09 02:39:28,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:28,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131317286] [2025-03-09 02:39:28,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:28,396 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-09 02:39:28,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-09 02:39:28,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:28,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-09 02:39:28,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131317286] [2025-03-09 02:39:28,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131317286] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291740139] [2025-03-09 02:39:28,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:28,519 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) [2025-03-09 02:39:28,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 02:39:28,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-09 02:39:28,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-09 02:39:28,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:28,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:28,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-09 02:39:28,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-09 02:39:28,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-09 02:39:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291740139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:28,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:28,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-09 02:39:28,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788478746] [2025-03-09 02:39:28,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:28,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 02:39:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:28,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 02:39:28,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-09 02:39:28,770 INFO L87 Difference]: Start difference. First operand 3296 states and 6056 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:29,910 INFO L93 Difference]: Finished difference Result 8935 states and 16870 transitions. [2025-03-09 02:39:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-09 02:39:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-09 02:39:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:29,961 INFO L225 Difference]: With dead ends: 8935 [2025-03-09 02:39:29,961 INFO L226 Difference]: Without dead ends: 8933 [2025-03-09 02:39:29,967 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2025-03-09 02:39:29,968 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 600 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:29,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 335 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2025-03-09 02:39:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 8720. [2025-03-09 02:39:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 6122 states have (on average 1.0991506043776544) internal successors, (6729), 6296 states have internal predecessors, (6729), 1535 states have call successors, (1535), 341 states have call predecessors, (1535), 1059 states have return successors, (7710), 2082 states have call predecessors, (7710), 1368 states have call successors, (7710) [2025-03-09 02:39:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 15974 transitions. [2025-03-09 02:39:30,899 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 15974 transitions. Word has length 57 [2025-03-09 02:39:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:30,899 INFO L471 AbstractCegarLoop]: Abstraction has 8720 states and 15974 transitions. [2025-03-09 02:39:30,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:39:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 15974 transitions. [2025-03-09 02:39:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-09 02:39:30,901 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:30,901 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:30,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 02:39:31,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:31,102 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:31,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1977419150, now seen corresponding path program 1 times [2025-03-09 02:39:31,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:31,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763775227] [2025-03-09 02:39:31,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:31,106 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-09 02:39:31,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-09 02:39:31,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:31,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-09 02:39:31,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:31,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763775227] [2025-03-09 02:39:31,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763775227] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65750937] [2025-03-09 02:39:31,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:31,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:31,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:31,248 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) [2025-03-09 02:39:31,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 02:39:31,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-09 02:39:31,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-09 02:39:31,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:31,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:31,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 02:39:31,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-09 02:39:31,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-09 02:39:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65750937] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:31,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:31,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-09 02:39:31,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29539164] [2025-03-09 02:39:31,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:31,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 02:39:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:31,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 02:39:31,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2025-03-09 02:39:31,688 INFO L87 Difference]: Start difference. First operand 8720 states and 15974 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-09 02:39:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:36,098 INFO L93 Difference]: Finished difference Result 37045 states and 112394 transitions. [2025-03-09 02:39:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-09 02:39:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2025-03-09 02:39:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:36,345 INFO L225 Difference]: With dead ends: 37045 [2025-03-09 02:39:36,345 INFO L226 Difference]: Without dead ends: 28996 [2025-03-09 02:39:36,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1752, Invalid=7560, Unknown=0, NotChecked=0, Total=9312 [2025-03-09 02:39:36,493 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 219 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:36,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 406 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-09 02:39:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2025-03-09 02:39:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 20092. [2025-03-09 02:39:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20092 states, 13074 states have (on average 1.0577482025393912) internal successors, (13829), 13284 states have internal predecessors, (13829), 4021 states have call successors, (4021), 427 states have call predecessors, (4021), 2993 states have return successors, (45035), 6380 states have call predecessors, (45035), 3840 states have call successors, (45035) [2025-03-09 02:39:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20092 states to 20092 states and 62885 transitions. [2025-03-09 02:39:39,834 INFO L78 Accepts]: Start accepts. Automaton has 20092 states and 62885 transitions. Word has length 55 [2025-03-09 02:39:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:39,834 INFO L471 AbstractCegarLoop]: Abstraction has 20092 states and 62885 transitions. [2025-03-09 02:39:39,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-09 02:39:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 20092 states and 62885 transitions. [2025-03-09 02:39:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-09 02:39:39,838 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:39,838 INFO L218 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:39,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:40,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:40,043 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:40,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:40,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1986508700, now seen corresponding path program 2 times [2025-03-09 02:39:40,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:40,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114856063] [2025-03-09 02:39:40,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:40,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:40,048 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-03-09 02:39:40,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-09 02:39:40,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:40,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 83 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-09 02:39:40,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:40,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114856063] [2025-03-09 02:39:40,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114856063] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:40,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132835302] [2025-03-09 02:39:40,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:40,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:40,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:40,226 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) [2025-03-09 02:39:40,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 02:39:40,256 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-03-09 02:39:40,271 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-09 02:39:40,271 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:40,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:40,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-09 02:39:40,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-09 02:39:40,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-09 02:39:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132835302] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:40,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:40,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2025-03-09 02:39:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810746360] [2025-03-09 02:39:40,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:40,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-09 02:39:40,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:40,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-09 02:39:40,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2025-03-09 02:39:40,901 INFO L87 Difference]: Start difference. First operand 20092 states and 62885 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-09 02:39:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:44,214 INFO L93 Difference]: Finished difference Result 34821 states and 105928 transitions. [2025-03-09 02:39:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-09 02:39:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 80 [2025-03-09 02:39:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:44,289 INFO L225 Difference]: With dead ends: 34821 [2025-03-09 02:39:44,289 INFO L226 Difference]: Without dead ends: 15389 [2025-03-09 02:39:44,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1108, Invalid=5212, Unknown=0, NotChecked=0, Total=6320 [2025-03-09 02:39:44,540 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 177 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:44,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 395 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-09 02:39:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15389 states. [2025-03-09 02:39:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15389 to 12581. [2025-03-09 02:39:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12581 states, 8648 states have (on average 1.0882284921369103) internal successors, (9411), 9009 states have internal predecessors, (9411), 2410 states have call successors, (2410), 459 states have call predecessors, (2410), 1519 states have return successors, (6313), 3112 states have call predecessors, (6313), 2233 states have call successors, (6313) [2025-03-09 02:39:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12581 states to 12581 states and 18134 transitions. [2025-03-09 02:39:45,936 INFO L78 Accepts]: Start accepts. Automaton has 12581 states and 18134 transitions. Word has length 80 [2025-03-09 02:39:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:45,937 INFO L471 AbstractCegarLoop]: Abstraction has 12581 states and 18134 transitions. [2025-03-09 02:39:45,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-09 02:39:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 12581 states and 18134 transitions. [2025-03-09 02:39:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-09 02:39:45,940 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:45,940 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:45,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-09 02:39:46,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:46,141 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:46,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:46,142 INFO L85 PathProgramCache]: Analyzing trace with hash 173863337, now seen corresponding path program 3 times [2025-03-09 02:39:46,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:46,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502621068] [2025-03-09 02:39:46,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:46,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:46,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 67 statements into 7 equivalence classes. [2025-03-09 02:39:46,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 67 statements. [2025-03-09 02:39:46,150 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 02:39:46,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-09 02:39:46,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:46,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502621068] [2025-03-09 02:39:46,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502621068] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:46,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 02:39:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775143435] [2025-03-09 02:39:46,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:46,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:46,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:46,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:46,179 INFO L87 Difference]: Start difference. First operand 12581 states and 18134 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-09 02:39:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:47,361 INFO L93 Difference]: Finished difference Result 12681 states and 19705 transitions. [2025-03-09 02:39:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2025-03-09 02:39:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:47,406 INFO L225 Difference]: With dead ends: 12681 [2025-03-09 02:39:47,406 INFO L226 Difference]: Without dead ends: 10670 [2025-03-09 02:39:47,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 02:39:47,418 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:47,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 02:39:47,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10670 states. [2025-03-09 02:39:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10670 to 10486. [2025-03-09 02:39:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10486 states, 6985 states have (on average 1.0564065855404439) internal successors, (7379), 7108 states have internal predecessors, (7379), 2240 states have call successors, (2240), 331 states have call predecessors, (2240), 1258 states have return successors, (5982), 3046 states have call predecessors, (5982), 2233 states have call successors, (5982) [2025-03-09 02:39:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10486 states to 10486 states and 15601 transitions. [2025-03-09 02:39:48,557 INFO L78 Accepts]: Start accepts. Automaton has 10486 states and 15601 transitions. Word has length 67 [2025-03-09 02:39:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:48,557 INFO L471 AbstractCegarLoop]: Abstraction has 10486 states and 15601 transitions. [2025-03-09 02:39:48,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-09 02:39:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10486 states and 15601 transitions. [2025-03-09 02:39:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-09 02:39:48,559 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:48,560 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:48,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-09 02:39:48,560 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:48,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1635289475, now seen corresponding path program 3 times [2025-03-09 02:39:48,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:48,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961759770] [2025-03-09 02:39:48,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:48,564 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 8 equivalence classes. [2025-03-09 02:39:48,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 68 of 68 statements. [2025-03-09 02:39:48,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-09 02:39:48,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 46 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-09 02:39:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961759770] [2025-03-09 02:39:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961759770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:48,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386022139] [2025-03-09 02:39:48,730 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:48,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:48,732 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:39:48,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 02:39:48,770 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 8 equivalence classes. [2025-03-09 02:39:48,785 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 68 of 68 statements. [2025-03-09 02:39:48,785 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-09 02:39:48,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:48,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 02:39:48,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:48,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 02:39:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386022139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:49,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:49,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2025-03-09 02:39:49,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661358476] [2025-03-09 02:39:49,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:49,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-09 02:39:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:49,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-09 02:39:49,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2025-03-09 02:39:49,332 INFO L87 Difference]: Start difference. First operand 10486 states and 15601 transitions. Second operand has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 29 states have internal predecessors, (132), 16 states have call successors, (18), 13 states have call predecessors, (18), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-09 02:39:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:51,434 INFO L93 Difference]: Finished difference Result 20433 states and 35844 transitions. [2025-03-09 02:39:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-09 02:39:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 29 states have internal predecessors, (132), 16 states have call successors, (18), 13 states have call predecessors, (18), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2025-03-09 02:39:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:51,495 INFO L225 Difference]: With dead ends: 20433 [2025-03-09 02:39:51,495 INFO L226 Difference]: Without dead ends: 10519 [2025-03-09 02:39:51,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2025-03-09 02:39:51,562 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 354 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:51,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 202 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:39:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2025-03-09 02:39:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10235. [2025-03-09 02:39:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10235 states, 6682 states have (on average 1.0428015564202335) internal successors, (6968), 6813 states have internal predecessors, (6968), 2128 states have call successors, (2128), 279 states have call predecessors, (2128), 1423 states have return successors, (5603), 3142 states have call predecessors, (5603), 2122 states have call successors, (5603) [2025-03-09 02:39:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10235 states to 10235 states and 14699 transitions. [2025-03-09 02:39:52,869 INFO L78 Accepts]: Start accepts. Automaton has 10235 states and 14699 transitions. Word has length 68 [2025-03-09 02:39:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:52,869 INFO L471 AbstractCegarLoop]: Abstraction has 10235 states and 14699 transitions. [2025-03-09 02:39:52,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 29 states have internal predecessors, (132), 16 states have call successors, (18), 13 states have call predecessors, (18), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-09 02:39:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10235 states and 14699 transitions. [2025-03-09 02:39:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-09 02:39:52,871 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:52,871 INFO L218 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:52,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:53,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:53,076 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:53,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash -694576220, now seen corresponding path program 2 times [2025-03-09 02:39:53,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:53,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484595467] [2025-03-09 02:39:53,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:53,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:53,080 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 81 statements into 2 equivalence classes. [2025-03-09 02:39:53,084 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-09 02:39:53,084 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:53,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 78 proven. 31 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2025-03-09 02:39:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484595467] [2025-03-09 02:39:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484595467] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701782363] [2025-03-09 02:39:53,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:53,146 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:39:53,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-09 02:39:53,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 81 statements into 2 equivalence classes. [2025-03-09 02:39:53,201 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-09 02:39:53,201 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:53,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:53,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-09 02:39:53,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-09 02:39:53,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-09 02:39:53,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701782363] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:53,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:53,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 11 [2025-03-09 02:39:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916934892] [2025-03-09 02:39:53,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:53,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 02:39:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:53,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 02:39:53,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-09 02:39:53,476 INFO L87 Difference]: Start difference. First operand 10235 states and 14699 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 10 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2025-03-09 02:39:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:55,450 INFO L93 Difference]: Finished difference Result 22118 states and 33837 transitions. [2025-03-09 02:39:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 02:39:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 10 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) Word has length 81 [2025-03-09 02:39:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:55,512 INFO L225 Difference]: With dead ends: 22118 [2025-03-09 02:39:55,512 INFO L226 Difference]: Without dead ends: 12286 [2025-03-09 02:39:55,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2025-03-09 02:39:55,568 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:55,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 109 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12286 states. [2025-03-09 02:39:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12286 to 10000. [2025-03-09 02:39:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 6542 states have (on average 1.043717517578722) internal successors, (6828), 6673 states have internal predecessors, (6828), 2078 states have call successors, (2078), 279 states have call predecessors, (2078), 1378 states have return successors, (5412), 3047 states have call predecessors, (5412), 2045 states have call successors, (5412) [2025-03-09 02:39:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 14318 transitions. [2025-03-09 02:39:57,285 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 14318 transitions. Word has length 81 [2025-03-09 02:39:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:57,285 INFO L471 AbstractCegarLoop]: Abstraction has 10000 states and 14318 transitions. [2025-03-09 02:39:57,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 10 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2025-03-09 02:39:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 14318 transitions. [2025-03-09 02:39:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-09 02:39:57,287 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:57,287 INFO L218 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:57,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-09 02:39:57,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:57,492 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:57,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -456104179, now seen corresponding path program 3 times [2025-03-09 02:39:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:57,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542019193] [2025-03-09 02:39:57,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:57,497 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 7 equivalence classes. [2025-03-09 02:39:57,504 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 86 of 100 statements. [2025-03-09 02:39:57,505 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 02:39:57,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 127 proven. 43 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-09 02:39:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542019193] [2025-03-09 02:39:57,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542019193] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:57,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403395137] [2025-03-09 02:39:57,581 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:57,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:57,583 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:39:57,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-09 02:39:57,625 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 7 equivalence classes. [2025-03-09 02:39:57,643 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 86 of 100 statements. [2025-03-09 02:39:57,643 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 02:39:57,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:57,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 02:39:57,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-09 02:39:57,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-09 02:39:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403395137] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:58,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:58,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 15 [2025-03-09 02:39:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542727467] [2025-03-09 02:39:58,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:58,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-09 02:39:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:58,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-09 02:39:58,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-09 02:39:58,230 INFO L87 Difference]: Start difference. First operand 10000 states and 14318 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-09 02:39:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:59,570 INFO L93 Difference]: Finished difference Result 20552 states and 34945 transitions. [2025-03-09 02:39:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 02:39:59,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) Word has length 100 [2025-03-09 02:39:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:59,626 INFO L225 Difference]: With dead ends: 20552 [2025-03-09 02:39:59,626 INFO L226 Difference]: Without dead ends: 11109 [2025-03-09 02:39:59,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 195 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-09 02:39:59,667 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:59,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 154 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11109 states. [2025-03-09 02:40:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11109 to 6185. [2025-03-09 02:40:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 4146 states have (on average 1.0381090207428847) internal successors, (4304), 4258 states have internal predecessors, (4304), 1225 states have call successors, (1225), 214 states have call predecessors, (1225), 812 states have return successors, (2059), 1712 states have call predecessors, (2059), 1203 states have call successors, (2059) [2025-03-09 02:40:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 7588 transitions. [2025-03-09 02:40:00,532 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 7588 transitions. Word has length 100 [2025-03-09 02:40:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:00,533 INFO L471 AbstractCegarLoop]: Abstraction has 6185 states and 7588 transitions. [2025-03-09 02:40:00,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-09 02:40:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 7588 transitions. [2025-03-09 02:40:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-09 02:40:00,535 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:00,535 INFO L218 NwaCegarLoop]: trace histogram [12, 10, 8, 8, 8, 7, 7, 7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:40:00,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-09 02:40:00,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-09 02:40:00,736 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:00,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1767133044, now seen corresponding path program 3 times [2025-03-09 02:40:00,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:00,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786766869] [2025-03-09 02:40:00,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:00,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:00,739 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 104 statements into 10 equivalence classes. [2025-03-09 02:40:00,755 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 104 of 104 statements. [2025-03-09 02:40:00,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-09 02:40:00,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 179 proven. 91 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-09 02:40:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786766869] [2025-03-09 02:40:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786766869] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108581616] [2025-03-09 02:40:01,083 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:01,085 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:40:01,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-09 02:40:01,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 104 statements into 10 equivalence classes. [2025-03-09 02:40:01,156 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 104 of 104 statements. [2025-03-09 02:40:01,156 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-09 02:40:01,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:01,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-09 02:40:01,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 171 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-09 02:40:01,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 191 proven. 79 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-09 02:40:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108581616] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:02,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:02,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 22] total 43 [2025-03-09 02:40:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319173290] [2025-03-09 02:40:02,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:02,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-09 02:40:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:02,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-09 02:40:02,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2025-03-09 02:40:02,094 INFO L87 Difference]: Start difference. First operand 6185 states and 7588 transitions. Second operand has 44 states, 43 states have (on average 2.697674418604651) internal successors, (116), 28 states have internal predecessors, (116), 13 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-09 02:40:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:03,604 INFO L93 Difference]: Finished difference Result 11662 states and 14984 transitions. [2025-03-09 02:40:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-09 02:40:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.697674418604651) internal successors, (116), 28 states have internal predecessors, (116), 13 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2025-03-09 02:40:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:03,630 INFO L225 Difference]: With dead ends: 11662 [2025-03-09 02:40:03,630 INFO L226 Difference]: Without dead ends: 6110 [2025-03-09 02:40:03,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1344, Invalid=5628, Unknown=0, NotChecked=0, Total=6972 [2025-03-09 02:40:03,646 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 171 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:03,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 390 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:40:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2025-03-09 02:40:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 6028. [2025-03-09 02:40:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 4059 states have (on average 1.0344912540034492) internal successors, (4199), 4171 states have internal predecessors, (4199), 1172 states have call successors, (1172), 214 states have call predecessors, (1172), 795 states have return successors, (1953), 1642 states have call predecessors, (1953), 1150 states have call successors, (1953) [2025-03-09 02:40:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 7324 transitions. [2025-03-09 02:40:04,379 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 7324 transitions. Word has length 104 [2025-03-09 02:40:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:04,379 INFO L471 AbstractCegarLoop]: Abstraction has 6028 states and 7324 transitions. [2025-03-09 02:40:04,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.697674418604651) internal successors, (116), 28 states have internal predecessors, (116), 13 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-09 02:40:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 7324 transitions. [2025-03-09 02:40:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-09 02:40:04,381 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:04,381 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2025-03-09 02:40:04,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-09 02:40:04,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-09 02:40:04,586 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:04,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:04,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1997819510, now seen corresponding path program 3 times [2025-03-09 02:40:04,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:04,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985981632] [2025-03-09 02:40:04,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:04,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:04,590 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-03-09 02:40:04,608 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-03-09 02:40:04,609 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-09 02:40:04,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:40:04,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985981632] [2025-03-09 02:40:04,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985981632] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19598461] [2025-03-09 02:40:04,885 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:04,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:04,887 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:40:04,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-09 02:40:04,938 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-03-09 02:40:04,958 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-03-09 02:40:04,958 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-09 02:40:04,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:04,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-09 02:40:04,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:40:05,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 02:40:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19598461] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:05,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:05,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-03-09 02:40:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250519749] [2025-03-09 02:40:05,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:05,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-09 02:40:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:05,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-09 02:40:05,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2025-03-09 02:40:05,483 INFO L87 Difference]: Start difference. First operand 6028 states and 7324 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:40:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:07,356 INFO L93 Difference]: Finished difference Result 10945 states and 13321 transitions. [2025-03-09 02:40:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-09 02:40:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2025-03-09 02:40:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:07,388 INFO L225 Difference]: With dead ends: 10945 [2025-03-09 02:40:07,388 INFO L226 Difference]: Without dead ends: 10944 [2025-03-09 02:40:07,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2025-03-09 02:40:07,392 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 837 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:07,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 621 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:40:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2025-03-09 02:40:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10900. [2025-03-09 02:40:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10900 states, 7275 states have (on average 1.0357388316151204) internal successors, (7535), 7495 states have internal predecessors, (7535), 2120 states have call successors, (2120), 334 states have call predecessors, (2120), 1503 states have return successors, (3609), 3070 states have call predecessors, (3609), 2098 states have call successors, (3609) [2025-03-09 02:40:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10900 states to 10900 states and 13264 transitions. [2025-03-09 02:40:08,798 INFO L78 Accepts]: Start accepts. Automaton has 10900 states and 13264 transitions. Word has length 91 [2025-03-09 02:40:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:08,798 INFO L471 AbstractCegarLoop]: Abstraction has 10900 states and 13264 transitions. [2025-03-09 02:40:08,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 02:40:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10900 states and 13264 transitions. [2025-03-09 02:40:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-09 02:40:08,800 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:08,800 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:40:08,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-09 02:40:09,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-09 02:40:09,001 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:09,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2745563, now seen corresponding path program 4 times [2025-03-09 02:40:09,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:09,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145074350] [2025-03-09 02:40:09,001 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 02:40:09,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:09,005 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-09 02:40:09,010 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-09 02:40:09,010 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 02:40:09,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 43 proven. 71 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2025-03-09 02:40:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145074350] [2025-03-09 02:40:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145074350] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850967471] [2025-03-09 02:40:09,265 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 02:40:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:09,267 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:40:09,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-09 02:40:09,319 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-09 02:40:09,337 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-09 02:40:09,337 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 02:40:09,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:09,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 02:40:09,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-09 02:40:09,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-09 02:40:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850967471] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:10,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 40 [2025-03-09 02:40:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639157844] [2025-03-09 02:40:10,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:10,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-09 02:40:10,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:10,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-09 02:40:10,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2025-03-09 02:40:10,586 INFO L87 Difference]: Start difference. First operand 10900 states and 13264 transitions. Second operand has 41 states, 40 states have (on average 1.875) internal successors, (75), 31 states have internal predecessors, (75), 9 states have call successors, (11), 3 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2025-03-09 02:40:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:16,807 INFO L93 Difference]: Finished difference Result 40082 states and 58409 transitions. [2025-03-09 02:40:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2025-03-09 02:40:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.875) internal successors, (75), 31 states have internal predecessors, (75), 9 states have call successors, (11), 3 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) Word has length 91 [2025-03-09 02:40:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:16,957 INFO L225 Difference]: With dead ends: 40082 [2025-03-09 02:40:16,957 INFO L226 Difference]: Without dead ends: 38981 [2025-03-09 02:40:16,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8876 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4423, Invalid=22637, Unknown=0, NotChecked=0, Total=27060 [2025-03-09 02:40:16,986 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 332 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:16,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 297 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:40:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38981 states. [2025-03-09 02:40:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38981 to 18407. [2025-03-09 02:40:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18407 states, 11855 states have (on average 1.023281315900464) internal successors, (12131), 12065 states have internal predecessors, (12131), 3710 states have call successors, (3710), 395 states have call predecessors, (3710), 2840 states have return successors, (7522), 5946 states have call predecessors, (7522), 3679 states have call successors, (7522) [2025-03-09 02:40:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18407 states to 18407 states and 23363 transitions. [2025-03-09 02:40:20,143 INFO L78 Accepts]: Start accepts. Automaton has 18407 states and 23363 transitions. Word has length 91 [2025-03-09 02:40:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:20,144 INFO L471 AbstractCegarLoop]: Abstraction has 18407 states and 23363 transitions. [2025-03-09 02:40:20,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.875) internal successors, (75), 31 states have internal predecessors, (75), 9 states have call successors, (11), 3 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2025-03-09 02:40:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18407 states and 23363 transitions. [2025-03-09 02:40:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2025-03-09 02:40:20,156 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:20,156 INFO L218 NwaCegarLoop]: trace histogram [18, 16, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:40:20,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-09 02:40:20,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:20,359 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:20,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1870843355, now seen corresponding path program 5 times [2025-03-09 02:40:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:20,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576119741] [2025-03-09 02:40:20,360 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 02:40:20,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:20,366 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 167 statements into 13 equivalence classes. [2025-03-09 02:40:20,390 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 167 of 167 statements. [2025-03-09 02:40:20,390 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-09 02:40:20,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 134 proven. 297 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2025-03-09 02:40:21,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:21,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576119741] [2025-03-09 02:40:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576119741] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:21,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469505077] [2025-03-09 02:40:21,087 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 02:40:21,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:21,089 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 02:40:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-09 02:40:21,160 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 167 statements into 13 equivalence classes. [2025-03-09 02:40:21,199 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 167 of 167 statements. [2025-03-09 02:40:21,199 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-09 02:40:21,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:21,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-09 02:40:21,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 98 proven. 285 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2025-03-09 02:40:21,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 114 proven. 409 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2025-03-09 02:40:28,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469505077] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:28,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:28,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 43] total 72 [2025-03-09 02:40:28,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251002133] [2025-03-09 02:40:28,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:28,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-09 02:40:28,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:28,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-09 02:40:28,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4646, Unknown=0, NotChecked=0, Total=5256 [2025-03-09 02:40:28,316 INFO L87 Difference]: Start difference. First operand 18407 states and 23363 transitions. Second operand has 73 states, 72 states have (on average 1.6527777777777777) internal successors, (119), 55 states have internal predecessors, (119), 17 states have call successors, (19), 3 states have call predecessors, (19), 25 states have return successors, (32), 32 states have call predecessors, (32), 15 states have call successors, (32)