./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann02.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/Ackermann02.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 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 02:39:11,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 02:39:11,547 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-09 02:39:11,551 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 02:39:11,551 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 02:39:11,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 02:39:11,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 02:39:11,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 02:39:11,573 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 02:39:11,573 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 02:39:11,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 02:39:11,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 02:39:11,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 02:39:11,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-09 02:39:11,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 02:39:11,576 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 02:39:11,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 02:39:11,577 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 02:39:11,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 02:39:11,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 02:39:11,578 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 -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2025-03-09 02:39:11,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 02:39:11,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 02:39:11,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 02:39:11,795 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 02:39:11,795 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 02:39:11,796 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2025-03-09 02:39:12,923 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f0bc0ec/eb3d608df7c141d08e345dc527c29f99/FLAGf6cef52df [2025-03-09 02:39:13,111 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 02:39:13,112 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2025-03-09 02:39:13,133 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f0bc0ec/eb3d608df7c141d08e345dc527c29f99/FLAGf6cef52df [2025-03-09 02:39:13,142 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33f0bc0ec/eb3d608df7c141d08e345dc527c29f99 [2025-03-09 02:39:13,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 02:39:13,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 02:39:13,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 02:39:13,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 02:39:13,148 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 02:39:13,149 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575fa61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13, skipping insertion in model container [2025-03-09 02:39:13,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,157 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 02:39:13,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 02:39:13,260 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 02:39:13,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 02:39:13,282 INFO L204 MainTranslator]: Completed translation [2025-03-09 02:39:13,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13 WrapperNode [2025-03-09 02:39:13,282 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 02:39:13,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 02:39:13,284 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 02:39:13,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 02:39:13,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,305 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2025-03-09 02:39:13,305 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 02:39:13,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 02:39:13,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 02:39:13,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 02:39:13,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,316 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,323 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 02:39:13,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,329 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,330 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 02:39:13,335 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 02:39:13,335 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 02:39:13,335 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 02:39:13,335 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (1/1) ... [2025-03-09 02:39:13,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 02:39:13,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:13,361 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 02:39:13,365 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 02:39:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 02:39:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 02:39:13,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 02:39:13,385 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-03-09 02:39:13,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-03-09 02:39:13,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 02:39:13,432 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 02:39:13,434 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 02:39:13,557 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: havoc #t~ret5;havoc #t~ret6; [2025-03-09 02:39:13,557 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L21: havoc #t~ret4; [2025-03-09 02:39:13,571 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2025-03-09 02:39:13,571 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 02:39:13,578 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 02:39:13,579 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 02:39:13,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 02:39:13 BoogieIcfgContainer [2025-03-09 02:39:13,579 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 02:39:13,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 02:39:13,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 02:39:13,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 02:39:13,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 02:39:13" (1/3) ... [2025-03-09 02:39:13,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5784217e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 02:39:13, skipping insertion in model container [2025-03-09 02:39:13,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 02:39:13" (2/3) ... [2025-03-09 02:39:13,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5784217e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 02:39:13, skipping insertion in model container [2025-03-09 02:39:13,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 02:39:13" (3/3) ... [2025-03-09 02:39:13,587 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2025-03-09 02:39:13,599 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 02:39:13,601 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann02.c that has 2 procedures, 39 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2025-03-09 02:39:13,638 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 02:39:13,647 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;@1089c1df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 02:39:13,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-09 02:39:13,650 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 02:39:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-09 02:39:13,655 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,656 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,656 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,660 INFO L85 PathProgramCache]: Analyzing trace with hash -489113992, now seen corresponding path program 1 times [2025-03-09 02:39:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882514221] [2025-03-09 02:39:13,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 02:39:13,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 02:39:13,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:13,817 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 02:39:13,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:13,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882514221] [2025-03-09 02:39:13,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882514221] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:13,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:13,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263958070] [2025-03-09 02:39:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:13,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:13,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:13,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:13,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:13,835 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 02:39:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:13,943 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2025-03-09 02:39:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:13,945 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 02:39:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:13,949 INFO L225 Difference]: With dead ends: 72 [2025-03-09 02:39:13,949 INFO L226 Difference]: Without dead ends: 59 [2025-03-09 02:39:13,951 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 02:39:13,954 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 38 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:13,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 128 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-09 02:39:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2025-03-09 02:39:13,978 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 02:39:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2025-03-09 02:39:13,982 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2025-03-09 02:39:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:13,982 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2025-03-09 02:39:13,982 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 02:39:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2025-03-09 02:39:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-09 02:39:13,983 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:13,983 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:13,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 02:39:13,983 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:13,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2017335443, now seen corresponding path program 1 times [2025-03-09 02:39:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:13,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227400453] [2025-03-09 02:39:13,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:13,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 02:39:13,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 02:39:13,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:13,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,050 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 02:39:14,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:14,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227400453] [2025-03-09 02:39:14,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227400453] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:14,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:14,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:14,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551531805] [2025-03-09 02:39:14,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:14,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:14,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:14,054 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 02:39:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,150 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2025-03-09 02:39:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:14,151 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 02:39:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,153 INFO L225 Difference]: With dead ends: 82 [2025-03-09 02:39:14,153 INFO L226 Difference]: Without dead ends: 80 [2025-03-09 02:39:14,155 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 02:39:14,155 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 02:39:14,156 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 02:39:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-09 02:39:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2025-03-09 02:39:14,165 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 02:39:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2025-03-09 02:39:14,167 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 9 [2025-03-09 02:39:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:14,168 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2025-03-09 02:39:14,168 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 02:39:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2025-03-09 02:39:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-09 02:39:14,168 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:14,168 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:14,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 02:39:14,169 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:14,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2017336276, now seen corresponding path program 1 times [2025-03-09 02:39:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:14,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263721650] [2025-03-09 02:39:14,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:14,174 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 02:39:14,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 02:39:14,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,221 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 02:39:14,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263721650] [2025-03-09 02:39:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263721650] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:14,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:14,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561662230] [2025-03-09 02:39:14,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:14,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:14,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:14,222 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 02:39:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,295 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2025-03-09 02:39:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:14,297 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 02:39:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,298 INFO L225 Difference]: With dead ends: 118 [2025-03-09 02:39:14,298 INFO L226 Difference]: Without dead ends: 108 [2025-03-09 02:39:14,298 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 02:39:14,299 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 02:39:14,299 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 02:39:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-09 02:39:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2025-03-09 02:39:14,308 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 02:39:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2025-03-09 02:39:14,310 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2025-03-09 02:39:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:14,310 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2025-03-09 02:39:14,310 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 02:39:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2025-03-09 02:39:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-09 02:39:14,311 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:14,311 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:14,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 02:39:14,311 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:14,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1887084879, now seen corresponding path program 1 times [2025-03-09 02:39:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243499404] [2025-03-09 02:39:14,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:14,317 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 02:39:14,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 02:39:14,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,364 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 02:39:14,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:14,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243499404] [2025-03-09 02:39:14,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243499404] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:14,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:14,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769474073] [2025-03-09 02:39:14,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:14,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:14,366 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 02:39:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,411 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2025-03-09 02:39:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:14,412 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 02:39:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,412 INFO L225 Difference]: With dead ends: 110 [2025-03-09 02:39:14,412 INFO L226 Difference]: Without dead ends: 108 [2025-03-09 02:39:14,413 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 02:39:14,413 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 02:39:14,414 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 02:39:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-09 02:39:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2025-03-09 02:39:14,433 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 02:39:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2025-03-09 02:39:14,435 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2025-03-09 02:39:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:14,436 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2025-03-09 02:39:14,436 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 02:39:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2025-03-09 02:39:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-09 02:39:14,436 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:14,437 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:14,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 02:39:14,437 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:14,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash -224957691, now seen corresponding path program 1 times [2025-03-09 02:39:14,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105672851] [2025-03-09 02:39:14,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:14,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 02:39:14,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 02:39:14,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,485 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 02:39:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105672851] [2025-03-09 02:39:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105672851] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 02:39:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138831091] [2025-03-09 02:39:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 02:39:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 02:39:14,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 02:39:14,486 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 02:39:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,539 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2025-03-09 02:39:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 02:39:14,539 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 02:39:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,540 INFO L225 Difference]: With dead ends: 170 [2025-03-09 02:39:14,540 INFO L226 Difference]: Without dead ends: 99 [2025-03-09 02:39:14,540 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 02:39:14,541 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 02:39:14,541 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 02:39:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-09 02:39:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2025-03-09 02:39:14,549 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 02:39:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2025-03-09 02:39:14,550 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2025-03-09 02:39:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:14,550 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2025-03-09 02:39:14,550 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 02:39:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2025-03-09 02:39:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-09 02:39:14,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:14,551 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:14,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-09 02:39:14,551 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:14,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:14,551 INFO L85 PathProgramCache]: Analyzing trace with hash -224957667, now seen corresponding path program 1 times [2025-03-09 02:39:14,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:14,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076625580] [2025-03-09 02:39:14,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:14,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 02:39:14,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 02:39:14,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,614 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 02:39:14,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:14,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076625580] [2025-03-09 02:39:14,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076625580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:14,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117789977] [2025-03-09 02:39:14,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:14,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:14,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:14,618 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 02:39:14,620 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 02:39:14,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 02:39:14,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 02:39:14,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:14,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:14,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 02:39:14,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:14,694 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 02:39:14,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:14,751 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 02:39:14,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117789977] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:14,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:14,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-09 02:39:14,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734560462] [2025-03-09 02:39:14,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:14,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 02:39:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:14,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 02:39:14,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-09 02:39:14,753 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 02:39:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:14,974 INFO L93 Difference]: Finished difference Result 276 states and 359 transitions. [2025-03-09 02:39:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 02:39:14,974 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 02:39:14,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:14,976 INFO L225 Difference]: With dead ends: 276 [2025-03-09 02:39:14,976 INFO L226 Difference]: Without dead ends: 274 [2025-03-09 02:39:14,977 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 02:39:14,977 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 217 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:14,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 201 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-03-09 02:39:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 236. [2025-03-09 02:39:15,026 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 02:39:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2025-03-09 02:39:15,030 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2025-03-09 02:39:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:15,031 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2025-03-09 02:39:15,031 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 02:39:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2025-03-09 02:39:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-09 02:39:15,031 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:15,031 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:15,038 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 02:39:15,232 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 02:39:15,232 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:15,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2020160200, now seen corresponding path program 1 times [2025-03-09 02:39:15,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:15,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357397192] [2025-03-09 02:39:15,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:15,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 02:39:15,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 02:39:15,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,308 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 02:39:15,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357397192] [2025-03-09 02:39:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357397192] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238988540] [2025-03-09 02:39:15,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:15,311 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 02:39:15,312 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 02:39:15,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 02:39:15,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 02:39:15,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 02:39:15,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:15,369 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 02:39:15,369 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 02:39:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238988540] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:15,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 02:39:15,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2025-03-09 02:39:15,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072519813] [2025-03-09 02:39:15,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:15,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:15,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:15,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:15,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-09 02:39:15,370 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 02:39:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:15,455 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2025-03-09 02:39:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 02:39:15,456 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 02:39:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:15,458 INFO L225 Difference]: With dead ends: 328 [2025-03-09 02:39:15,458 INFO L226 Difference]: Without dead ends: 327 [2025-03-09 02:39:15,458 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 02:39:15,460 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:15,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 108 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 02:39:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-09 02:39:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2025-03-09 02:39:15,488 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 02:39:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2025-03-09 02:39:15,490 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2025-03-09 02:39:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:15,490 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2025-03-09 02:39:15,490 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 02:39:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2025-03-09 02:39:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-09 02:39:15,491 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:15,491 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:15,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 02:39:15,695 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 02:39:15,695 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:15,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1511600730, now seen corresponding path program 1 times [2025-03-09 02:39:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16005621] [2025-03-09 02:39:15,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:15,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 02:39:15,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 02:39:15,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,747 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 02:39:15,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:15,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16005621] [2025-03-09 02:39:15,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16005621] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:15,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728994998] [2025-03-09 02:39:15,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:15,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:15,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:15,750 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 02:39:15,751 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 02:39:15,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 02:39:15,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 02:39:15,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:15,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:15,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 02:39:15,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:15,823 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 02:39:15,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:15,887 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 02:39:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728994998] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:15,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-09 02:39:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659110852] [2025-03-09 02:39:15,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:15,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 02:39:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:15,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 02:39:15,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-09 02:39:15,888 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 02:39:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:16,092 INFO L93 Difference]: Finished difference Result 577 states and 766 transitions. [2025-03-09 02:39:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 02:39:16,093 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 02:39:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:16,095 INFO L225 Difference]: With dead ends: 577 [2025-03-09 02:39:16,095 INFO L226 Difference]: Without dead ends: 576 [2025-03-09 02:39:16,096 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 02:39:16,096 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 158 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:16,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 193 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2025-03-09 02:39:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 521. [2025-03-09 02:39:16,131 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 02:39:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2025-03-09 02:39:16,134 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2025-03-09 02:39:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:16,134 INFO L471 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2025-03-09 02:39:16,134 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 02:39:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2025-03-09 02:39:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-09 02:39:16,135 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:16,135 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 02:39:16,141 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 02:39:16,335 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 02:39:16,336 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:16,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1980210359, now seen corresponding path program 1 times [2025-03-09 02:39:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:16,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169983149] [2025-03-09 02:39:16,336 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:16,339 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 02:39:16,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 02:39:16,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:16,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:16,400 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 02:39:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169983149] [2025-03-09 02:39:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169983149] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:16,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601712085] [2025-03-09 02:39:16,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:16,403 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 02:39:16,405 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 02:39:16,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 02:39:16,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 02:39:16,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:16,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:16,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 02:39:16,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:16,485 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 02:39:16,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:16,558 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 02:39:16,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601712085] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:16,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:16,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-09 02:39:16,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757830481] [2025-03-09 02:39:16,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:16,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 02:39:16,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:16,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 02:39:16,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2025-03-09 02:39:16,560 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 02:39:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:16,958 INFO L93 Difference]: Finished difference Result 1306 states and 1818 transitions. [2025-03-09 02:39:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-09 02:39:16,959 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 02:39:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:16,964 INFO L225 Difference]: With dead ends: 1306 [2025-03-09 02:39:16,965 INFO L226 Difference]: Without dead ends: 915 [2025-03-09 02:39:16,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2025-03-09 02:39:16,972 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:16,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 99 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2025-03-09 02:39:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 715. [2025-03-09 02:39:17,048 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 02:39:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 880 transitions. [2025-03-09 02:39:17,054 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 880 transitions. Word has length 24 [2025-03-09 02:39:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:17,055 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 880 transitions. [2025-03-09 02:39:17,055 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 02:39:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 880 transitions. [2025-03-09 02:39:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-09 02:39:17,057 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:17,057 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 02:39:17,063 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 02:39:17,258 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 02:39:17,258 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:17,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1184768225, now seen corresponding path program 1 times [2025-03-09 02:39:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:17,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408096059] [2025-03-09 02:39:17,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:17,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:17,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-09 02:39:17,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-09 02:39:17,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:17,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:17,338 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 02:39:17,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408096059] [2025-03-09 02:39:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408096059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084028873] [2025-03-09 02:39:17,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:17,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:17,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:17,340 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 02:39:17,342 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 02:39:17,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-09 02:39:17,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-09 02:39:17,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:17,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:17,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 02:39:17,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:17,396 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 02:39:17,397 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 02:39:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084028873] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:17,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 02:39:17,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2025-03-09 02:39:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726377688] [2025-03-09 02:39:17,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:17,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:17,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:17,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-09 02:39:17,399 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 02:39:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:17,516 INFO L93 Difference]: Finished difference Result 762 states and 976 transitions. [2025-03-09 02:39:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 02:39:17,516 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 02:39:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:17,520 INFO L225 Difference]: With dead ends: 762 [2025-03-09 02:39:17,520 INFO L226 Difference]: Without dead ends: 761 [2025-03-09 02:39:17,520 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 02:39:17,520 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, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:17,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 110 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2025-03-09 02:39:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 686. [2025-03-09 02:39:17,554 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 02:39:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 836 transitions. [2025-03-09 02:39:17,557 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 836 transitions. Word has length 28 [2025-03-09 02:39:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:17,558 INFO L471 AbstractCegarLoop]: Abstraction has 686 states and 836 transitions. [2025-03-09 02:39:17,558 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 02:39:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 836 transitions. [2025-03-09 02:39:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-09 02:39:17,559 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:17,559 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 02:39:17,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:17,759 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 02:39:17,759 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:17,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1930986427, now seen corresponding path program 1 times [2025-03-09 02:39:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:17,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139130057] [2025-03-09 02:39:17,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:17,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 02:39:17,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 02:39:17,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:17,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:17,850 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 02:39:17,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:17,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139130057] [2025-03-09 02:39:17,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139130057] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:17,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865387859] [2025-03-09 02:39:17,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:17,856 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 02:39:17,868 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 02:39:17,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 02:39:17,908 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 02:39:17,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:17,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:17,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:17,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:17,946 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 02:39:17,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:18,131 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 02:39:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865387859] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:18,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 02:39:18,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-09 02:39:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314069390] [2025-03-09 02:39:18,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:18,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 02:39:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:18,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 02:39:18,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:18,134 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 02:39:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:18,346 INFO L93 Difference]: Finished difference Result 793 states and 1000 transitions. [2025-03-09 02:39:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 02:39:18,346 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 02:39:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:18,350 INFO L225 Difference]: With dead ends: 793 [2025-03-09 02:39:18,350 INFO L226 Difference]: Without dead ends: 792 [2025-03-09 02:39:18,351 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 02:39:18,351 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:18,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2025-03-09 02:39:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 685. [2025-03-09 02:39:18,413 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 02:39:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 832 transitions. [2025-03-09 02:39:18,417 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 832 transitions. Word has length 33 [2025-03-09 02:39:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:18,417 INFO L471 AbstractCegarLoop]: Abstraction has 685 states and 832 transitions. [2025-03-09 02:39:18,417 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 02:39:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 832 transitions. [2025-03-09 02:39:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-09 02:39:18,418 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:18,418 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 02:39:18,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:18,619 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 02:39:18,619 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:18,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 268962918, now seen corresponding path program 1 times [2025-03-09 02:39:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438688333] [2025-03-09 02:39:18,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:18,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-09 02:39:18,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-09 02:39:18,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:18,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:18,717 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 02:39:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:18,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438688333] [2025-03-09 02:39:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438688333] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:18,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37139900] [2025-03-09 02:39:18,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:18,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:18,720 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 02:39:18,734 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 02:39:18,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-09 02:39:18,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-09 02:39:18,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:18,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:18,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:18,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:18,815 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 02:39:18,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:19,005 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 02:39:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37139900] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:19,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:19,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-09 02:39:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475507573] [2025-03-09 02:39:19,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:19,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 02:39:19,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:19,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 02:39:19,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:19,009 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 02:39:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:19,491 INFO L93 Difference]: Finished difference Result 1135 states and 1689 transitions. [2025-03-09 02:39:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 02:39:19,491 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 02:39:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:19,499 INFO L225 Difference]: With dead ends: 1135 [2025-03-09 02:39:19,499 INFO L226 Difference]: Without dead ends: 1134 [2025-03-09 02:39:19,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2025-03-09 02:39:19,501 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 92 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:19,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 223 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2025-03-09 02:39:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 945. [2025-03-09 02:39:19,583 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 02:39:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1269 transitions. [2025-03-09 02:39:19,590 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1269 transitions. Word has length 34 [2025-03-09 02:39:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:19,590 INFO L471 AbstractCegarLoop]: Abstraction has 945 states and 1269 transitions. [2025-03-09 02:39:19,590 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 02:39:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1269 transitions. [2025-03-09 02:39:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-09 02:39:19,591 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:19,591 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 02:39:19,600 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 02:39:19,795 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 02:39:19,795 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:19,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -54654743, now seen corresponding path program 1 times [2025-03-09 02:39:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:19,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314206407] [2025-03-09 02:39:19,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:19,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-09 02:39:19,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 02:39:19,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:19,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:19,878 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 02:39:19,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314206407] [2025-03-09 02:39:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314206407] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:19,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189991005] [2025-03-09 02:39:19,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:19,880 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 02:39:19,882 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 02:39:19,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-09 02:39:19,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 02:39:19,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:19,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:19,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 02:39:19,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:19,944 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 02:39:19,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:20,074 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 02:39:20,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189991005] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:20,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:20,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-09 02:39:20,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355601099] [2025-03-09 02:39:20,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:20,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 02:39:20,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:20,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 02:39:20,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:20,075 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 02:39:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:20,422 INFO L93 Difference]: Finished difference Result 1154 states and 1562 transitions. [2025-03-09 02:39:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-09 02:39:20,422 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 02:39:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:20,427 INFO L225 Difference]: With dead ends: 1154 [2025-03-09 02:39:20,427 INFO L226 Difference]: Without dead ends: 1153 [2025-03-09 02:39:20,427 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 02:39:20,428 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 221 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:20,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 201 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2025-03-09 02:39:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 986. [2025-03-09 02:39:20,503 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 02:39:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1316 transitions. [2025-03-09 02:39:20,508 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1316 transitions. Word has length 35 [2025-03-09 02:39:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:20,508 INFO L471 AbstractCegarLoop]: Abstraction has 986 states and 1316 transitions. [2025-03-09 02:39:20,508 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 02:39:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1316 transitions. [2025-03-09 02:39:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-09 02:39:20,509 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:20,509 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 02:39:20,515 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 02:39:20,713 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 02:39:20,713 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:20,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 776149949, now seen corresponding path program 1 times [2025-03-09 02:39:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570137732] [2025-03-09 02:39:20,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:20,716 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-09 02:39:20,718 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-09 02:39:20,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:20,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:20,788 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 02:39:20,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570137732] [2025-03-09 02:39:20,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570137732] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374665227] [2025-03-09 02:39:20,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:20,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:20,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:20,790 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 02:39:20,792 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 02:39:20,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-09 02:39:20,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-09 02:39:20,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:20,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:20,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:20,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:20,854 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 02:39:20,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:21,003 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 02:39:21,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374665227] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:21,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 02:39:21,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-09 02:39:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290839861] [2025-03-09 02:39:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:21,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 02:39:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:21,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 02:39:21,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-09 02:39:21,004 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 02:39:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:21,302 INFO L93 Difference]: Finished difference Result 1136 states and 1594 transitions. [2025-03-09 02:39:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-09 02:39:21,306 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 02:39:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:21,315 INFO L225 Difference]: With dead ends: 1136 [2025-03-09 02:39:21,315 INFO L226 Difference]: Without dead ends: 1135 [2025-03-09 02:39:21,316 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 02:39:21,316 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:21,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 154 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2025-03-09 02:39:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 994. [2025-03-09 02:39:21,414 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 02:39:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1265 transitions. [2025-03-09 02:39:21,418 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1265 transitions. Word has length 36 [2025-03-09 02:39:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:21,418 INFO L471 AbstractCegarLoop]: Abstraction has 994 states and 1265 transitions. [2025-03-09 02:39:21,418 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 02:39:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1265 transitions. [2025-03-09 02:39:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-09 02:39:21,419 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:21,419 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:21,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:21,619 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 02:39:21,620 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:21,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1235994774, now seen corresponding path program 2 times [2025-03-09 02:39:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354280707] [2025-03-09 02:39:21,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:21,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 02:39:21,626 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 02:39:21,627 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:21,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:21,714 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 02:39:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354280707] [2025-03-09 02:39:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354280707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261652709] [2025-03-09 02:39:21,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:21,716 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 02:39:21,717 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 02:39:21,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-09 02:39:21,744 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-09 02:39:21,744 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:21,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:21,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 02:39:21,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:21,798 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 02:39:21,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:21,920 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 02:39:21,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261652709] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:21,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:21,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-09 02:39:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91993922] [2025-03-09 02:39:21,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:21,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 02:39:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:21,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 02:39:21,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-09 02:39:21,925 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 02:39:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:22,354 INFO L93 Difference]: Finished difference Result 1989 states and 2570 transitions. [2025-03-09 02:39:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-09 02:39:22,355 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 02:39:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:22,363 INFO L225 Difference]: With dead ends: 1989 [2025-03-09 02:39:22,363 INFO L226 Difference]: Without dead ends: 1988 [2025-03-09 02:39:22,364 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 02:39:22,365 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 516 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:22,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 355 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2025-03-09 02:39:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1709. [2025-03-09 02:39:22,493 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 02:39:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2135 transitions. [2025-03-09 02:39:22,499 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2135 transitions. Word has length 43 [2025-03-09 02:39:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:22,499 INFO L471 AbstractCegarLoop]: Abstraction has 1709 states and 2135 transitions. [2025-03-09 02:39:22,500 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 02:39:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2135 transitions. [2025-03-09 02:39:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-09 02:39:22,505 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:22,505 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 02:39:22,511 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 02:39:22,705 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 02:39:22,705 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:22,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1489943149, now seen corresponding path program 2 times [2025-03-09 02:39:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709806010] [2025-03-09 02:39:22,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:22,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-09 02:39:22,712 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-09 02:39:22,712 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:22,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:22,794 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 02:39:22,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:22,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709806010] [2025-03-09 02:39:22,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709806010] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:22,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286726401] [2025-03-09 02:39:22,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:22,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:22,796 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 02:39:22,798 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 02:39:22,820 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-09 02:39:22,830 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-09 02:39:22,830 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:22,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:22,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-09 02:39:22,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:22,869 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 02:39:22,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:23,037 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 02:39:23,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286726401] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:23,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:23,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2025-03-09 02:39:23,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598614794] [2025-03-09 02:39:23,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:23,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 02:39:23,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:23,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 02:39:23,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-09 02:39:23,038 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 02:39:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:23,950 INFO L93 Difference]: Finished difference Result 3697 states and 5359 transitions. [2025-03-09 02:39:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-09 02:39:23,951 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 02:39:23,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:23,961 INFO L225 Difference]: With dead ends: 3697 [2025-03-09 02:39:23,961 INFO L226 Difference]: Without dead ends: 2573 [2025-03-09 02:39:23,967 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2025-03-09 02:39:23,968 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 189 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:23,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 295 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:39:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2025-03-09 02:39:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1888. [2025-03-09 02:39:24,106 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 02:39:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2341 transitions. [2025-03-09 02:39:24,113 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2341 transitions. Word has length 44 [2025-03-09 02:39:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:24,113 INFO L471 AbstractCegarLoop]: Abstraction has 1888 states and 2341 transitions. [2025-03-09 02:39:24,113 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 02:39:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2341 transitions. [2025-03-09 02:39:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-09 02:39:24,115 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:24,115 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 02:39:24,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:24,315 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 02:39:24,316 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:24,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash -460172098, now seen corresponding path program 1 times [2025-03-09 02:39:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:24,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696523855] [2025-03-09 02:39:24,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:24,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-09 02:39:24,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:24,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:24,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:24,400 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 02:39:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696523855] [2025-03-09 02:39:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696523855] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501204688] [2025-03-09 02:39:24,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:24,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:24,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:24,402 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 02:39:24,404 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 02:39:24,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-09 02:39:24,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:24,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:24,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:24,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 02:39:24,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:24,460 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 02:39:24,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:24,541 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 02:39:24,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501204688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:24,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2025-03-09 02:39:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600873206] [2025-03-09 02:39:24,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:24,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 02:39:24,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:24,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 02:39:24,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-09 02:39:24,543 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 02:39:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:24,821 INFO L93 Difference]: Finished difference Result 2110 states and 2763 transitions. [2025-03-09 02:39:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 02:39:24,821 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 02:39:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:24,829 INFO L225 Difference]: With dead ends: 2110 [2025-03-09 02:39:24,830 INFO L226 Difference]: Without dead ends: 2010 [2025-03-09 02:39:24,831 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 02:39:24,831 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:24,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 127 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2025-03-09 02:39:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1894. [2025-03-09 02:39:25,011 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 02:39:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2346 transitions. [2025-03-09 02:39:25,019 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2346 transitions. Word has length 51 [2025-03-09 02:39:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:25,019 INFO L471 AbstractCegarLoop]: Abstraction has 1894 states and 2346 transitions. [2025-03-09 02:39:25,019 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 02:39:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2346 transitions. [2025-03-09 02:39:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-09 02:39:25,021 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:25,022 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 02:39:25,033 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 02:39:25,226 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 02:39:25,226 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:25,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash -682664631, now seen corresponding path program 2 times [2025-03-09 02:39:25,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:25,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464137170] [2025-03-09 02:39:25,227 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:25,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:25,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-09 02:39:25,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:25,239 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:25,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:25,363 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 02:39:25,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464137170] [2025-03-09 02:39:25,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464137170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843298521] [2025-03-09 02:39:25,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:25,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:25,366 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 02:39:25,368 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 02:39:25,392 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-09 02:39:25,401 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 02:39:25,402 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:25,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:25,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 02:39:25,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:25,450 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 02:39:25,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:25,638 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 02:39:25,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843298521] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:25,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:25,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-09 02:39:25,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215720588] [2025-03-09 02:39:25,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:25,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 02:39:25,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:25,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 02:39:25,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-09 02:39:25,639 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 02:39:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:26,290 INFO L93 Difference]: Finished difference Result 2409 states and 3101 transitions. [2025-03-09 02:39:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-09 02:39:26,291 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 02:39:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:26,298 INFO L225 Difference]: With dead ends: 2409 [2025-03-09 02:39:26,298 INFO L226 Difference]: Without dead ends: 2408 [2025-03-09 02:39:26,299 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 02:39:26,299 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 435 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:26,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 297 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2025-03-09 02:39:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1937. [2025-03-09 02:39:26,506 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 02:39:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2395 transitions. [2025-03-09 02:39:26,511 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2395 transitions. Word has length 51 [2025-03-09 02:39:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:26,511 INFO L471 AbstractCegarLoop]: Abstraction has 1937 states and 2395 transitions. [2025-03-09 02:39:26,511 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 02:39:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2395 transitions. [2025-03-09 02:39:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-09 02:39:26,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:26,513 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 02:39:26,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:26,717 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 02:39:26,717 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:26,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:26,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1951011931, now seen corresponding path program 1 times [2025-03-09 02:39:26,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:26,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855993272] [2025-03-09 02:39:26,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:26,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:26,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-09 02:39:26,723 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 02:39:26,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:26,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:26,855 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 02:39:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855993272] [2025-03-09 02:39:26,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855993272] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38218279] [2025-03-09 02:39:26,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:26,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:26,858 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 02:39:26,860 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 02:39:26,885 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-09 02:39:26,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 02:39:26,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:26,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:26,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 02:39:26,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:26,934 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 02:39:26,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:27,341 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 02:39:27,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38218279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:27,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:27,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-09 02:39:27,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693120864] [2025-03-09 02:39:27,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:27,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 02:39:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:27,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 02:39:27,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2025-03-09 02:39:27,343 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 02:39:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:29,253 INFO L93 Difference]: Finished difference Result 4673 states and 8176 transitions. [2025-03-09 02:39:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-09 02:39:29,254 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 02:39:29,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:29,277 INFO L225 Difference]: With dead ends: 4673 [2025-03-09 02:39:29,278 INFO L226 Difference]: Without dead ends: 4672 [2025-03-09 02:39:29,282 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1475, Invalid=7081, Unknown=0, NotChecked=0, Total=8556 [2025-03-09 02:39:29,283 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 187 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:29,283 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 246 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-09 02:39:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2025-03-09 02:39:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 3296. [2025-03-09 02:39:29,687 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 02:39:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 6056 transitions. [2025-03-09 02:39:29,706 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 6056 transitions. Word has length 53 [2025-03-09 02:39:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:29,706 INFO L471 AbstractCegarLoop]: Abstraction has 3296 states and 6056 transitions. [2025-03-09 02:39:29,706 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 02:39:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 6056 transitions. [2025-03-09 02:39:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-09 02:39:29,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:29,709 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 02:39:29,717 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 02:39:29,910 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 02:39:29,910 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:29,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1491656896, now seen corresponding path program 1 times [2025-03-09 02:39:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6441055] [2025-03-09 02:39:29,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:29,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-09 02:39:29,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-09 02:39:29,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:29,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:30,054 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 02:39:30,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6441055] [2025-03-09 02:39:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6441055] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249577538] [2025-03-09 02:39:30,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:30,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:30,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:30,057 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 02:39:30,058 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 02:39:30,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-09 02:39:30,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-09 02:39:30,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:30,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:30,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-09 02:39:30,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:30,149 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 02:39:30,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:30,302 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 02:39:30,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249577538] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:30,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:30,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-09 02:39:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367244263] [2025-03-09 02:39:30,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:30,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 02:39:30,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:30,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 02:39:30,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-09 02:39:30,305 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 02:39:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:31,379 INFO L93 Difference]: Finished difference Result 8935 states and 16870 transitions. [2025-03-09 02:39:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-09 02:39:31,379 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 02:39:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:31,442 INFO L225 Difference]: With dead ends: 8935 [2025-03-09 02:39:31,443 INFO L226 Difference]: Without dead ends: 8933 [2025-03-09 02:39:31,449 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 02:39:31,449 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 456 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:31,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 341 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 02:39:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2025-03-09 02:39:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 8720. [2025-03-09 02:39:32,438 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 02:39:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 15974 transitions. [2025-03-09 02:39:32,496 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 15974 transitions. Word has length 57 [2025-03-09 02:39:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:32,496 INFO L471 AbstractCegarLoop]: Abstraction has 8720 states and 15974 transitions. [2025-03-09 02:39:32,496 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 02:39:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 15974 transitions. [2025-03-09 02:39:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-09 02:39:32,498 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:32,498 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 02:39:32,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-09 02:39:32,698 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 02:39:32,699 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:32,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1977419150, now seen corresponding path program 1 times [2025-03-09 02:39:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:32,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612347309] [2025-03-09 02:39:32,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:32,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-09 02:39:32,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-09 02:39:32,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:32,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:32,843 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 02:39:32,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612347309] [2025-03-09 02:39:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612347309] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787698355] [2025-03-09 02:39:32,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 02:39:32,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:32,845 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 02:39:32,847 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 02:39:32,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-09 02:39:32,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-09 02:39:32,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 02:39:32,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:32,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 02:39:32,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:32,927 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 02:39:32,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:33,342 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 02:39:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787698355] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:33,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-09 02:39:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875942267] [2025-03-09 02:39:33,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:33,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 02:39:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:33,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 02:39:33,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2025-03-09 02:39:33,343 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 02:39:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:38,064 INFO L93 Difference]: Finished difference Result 37045 states and 112394 transitions. [2025-03-09 02:39:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-09 02:39:38,064 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 02:39:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:38,320 INFO L225 Difference]: With dead ends: 37045 [2025-03-09 02:39:38,320 INFO L226 Difference]: Without dead ends: 28996 [2025-03-09 02:39:38,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1752, Invalid=7560, Unknown=0, NotChecked=0, Total=9312 [2025-03-09 02:39:38,461 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 172 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:38,461 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 354 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-09 02:39:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2025-03-09 02:39:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 20092. [2025-03-09 02:39:41,987 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 02:39:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20092 states to 20092 states and 62885 transitions. [2025-03-09 02:39:42,299 INFO L78 Accepts]: Start accepts. Automaton has 20092 states and 62885 transitions. Word has length 55 [2025-03-09 02:39:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:42,300 INFO L471 AbstractCegarLoop]: Abstraction has 20092 states and 62885 transitions. [2025-03-09 02:39:42,300 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 02:39:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20092 states and 62885 transitions. [2025-03-09 02:39:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-09 02:39:42,303 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:42,303 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:42,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-09 02:39:42,507 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 02:39:42,507 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:42,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1779584020, now seen corresponding path program 2 times [2025-03-09 02:39:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:42,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822273740] [2025-03-09 02:39:42,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:42,511 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-09 02:39:42,516 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-09 02:39:42,516 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:42,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-09 02:39:42,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822273740] [2025-03-09 02:39:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822273740] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:42,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011453766] [2025-03-09 02:39:42,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:42,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:42,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:42,714 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 02:39:42,715 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 02:39:42,745 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-09 02:39:42,760 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-09 02:39:42,760 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:42,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:42,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-09 02:39:42,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-09 02:39:42,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-09 02:39:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011453766] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:43,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:43,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2025-03-09 02:39:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613851922] [2025-03-09 02:39:43,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:43,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-09 02:39:43,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:43,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-09 02:39:43,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2025-03-09 02:39:43,485 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 02:39:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:46,636 INFO L93 Difference]: Finished difference Result 34821 states and 105928 transitions. [2025-03-09 02:39:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-09 02:39:46,637 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 72 [2025-03-09 02:39:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:46,716 INFO L225 Difference]: With dead ends: 34821 [2025-03-09 02:39:46,716 INFO L226 Difference]: Without dead ends: 15389 [2025-03-09 02:39:46,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1108, Invalid=5212, Unknown=0, NotChecked=0, Total=6320 [2025-03-09 02:39:46,970 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 183 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:46,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 488 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-09 02:39:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15389 states. [2025-03-09 02:39:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15389 to 12581. [2025-03-09 02:39:48,327 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 02:39:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12581 states to 12581 states and 18134 transitions. [2025-03-09 02:39:48,381 INFO L78 Accepts]: Start accepts. Automaton has 12581 states and 18134 transitions. Word has length 72 [2025-03-09 02:39:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:48,382 INFO L471 AbstractCegarLoop]: Abstraction has 12581 states and 18134 transitions. [2025-03-09 02:39:48,382 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 02:39:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12581 states and 18134 transitions. [2025-03-09 02:39:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-09 02:39:48,385 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:48,385 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 02:39:48,391 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 02:39:48,585 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 02:39:48,586 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:48,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 173863337, now seen corresponding path program 3 times [2025-03-09 02:39:48,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821842815] [2025-03-09 02:39:48,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:48,591 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 67 statements into 7 equivalence classes. [2025-03-09 02:39:48,599 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 67 statements. [2025-03-09 02:39:48,599 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 02:39:48,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:48,634 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 02:39:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:48,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821842815] [2025-03-09 02:39:48,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821842815] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 02:39:48,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 02:39:48,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 02:39:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308909964] [2025-03-09 02:39:48,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 02:39:48,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 02:39:48,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:48,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 02:39:48,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 02:39:48,636 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 02:39:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:50,227 INFO L93 Difference]: Finished difference Result 12681 states and 19705 transitions. [2025-03-09 02:39:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 02:39:50,228 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 02:39:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:50,281 INFO L225 Difference]: With dead ends: 12681 [2025-03-09 02:39:50,281 INFO L226 Difference]: Without dead ends: 10670 [2025-03-09 02:39:50,294 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 02:39:50,295 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 02:39:50,295 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 02:39:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10670 states. [2025-03-09 02:39:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10670 to 10486. [2025-03-09 02:39:51,804 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 02:39:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10486 states to 10486 states and 15601 transitions. [2025-03-09 02:39:51,853 INFO L78 Accepts]: Start accepts. Automaton has 10486 states and 15601 transitions. Word has length 67 [2025-03-09 02:39:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:51,853 INFO L471 AbstractCegarLoop]: Abstraction has 10486 states and 15601 transitions. [2025-03-09 02:39:51,853 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 02:39:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 10486 states and 15601 transitions. [2025-03-09 02:39:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-09 02:39:51,856 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:51,856 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 02:39:51,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-09 02:39:51,856 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:51,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1635289475, now seen corresponding path program 3 times [2025-03-09 02:39:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133007281] [2025-03-09 02:39:51,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:51,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 8 equivalence classes. [2025-03-09 02:39:51,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 68 of 68 statements. [2025-03-09 02:39:51,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-09 02:39:51,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:51,996 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 02:39:51,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133007281] [2025-03-09 02:39:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133007281] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380087855] [2025-03-09 02:39:51,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:39:51,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:52,002 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 02:39:52,004 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 02:39:52,037 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 8 equivalence classes. [2025-03-09 02:39:52,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 68 of 68 statements. [2025-03-09 02:39:52,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-09 02:39:52,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:52,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 02:39:52,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:52,258 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 02:39:52,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:52,622 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 02:39:52,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380087855] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:52,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:52,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2025-03-09 02:39:52,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049920349] [2025-03-09 02:39:52,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:52,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-09 02:39:52,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:52,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-09 02:39:52,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2025-03-09 02:39:52,624 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 02:39:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:54,989 INFO L93 Difference]: Finished difference Result 20433 states and 35844 transitions. [2025-03-09 02:39:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-09 02:39:54,989 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 02:39:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:55,036 INFO L225 Difference]: With dead ends: 20433 [2025-03-09 02:39:55,036 INFO L226 Difference]: Without dead ends: 10519 [2025-03-09 02:39:55,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2025-03-09 02:39:55,084 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 289 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:55,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 216 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:39:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2025-03-09 02:39:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10235. [2025-03-09 02:39:56,258 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 02:39:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10235 states to 10235 states and 14699 transitions. [2025-03-09 02:39:56,305 INFO L78 Accepts]: Start accepts. Automaton has 10235 states and 14699 transitions. Word has length 68 [2025-03-09 02:39:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:56,306 INFO L471 AbstractCegarLoop]: Abstraction has 10235 states and 14699 transitions. [2025-03-09 02:39:56,306 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 02:39:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10235 states and 14699 transitions. [2025-03-09 02:39:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-09 02:39:56,308 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:56,308 INFO L218 NwaCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 02:39:56,314 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 02:39:56,509 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 02:39:56,509 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:39:56,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:39:56,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1272830796, now seen corresponding path program 2 times [2025-03-09 02:39:56,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:39:56,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359552493] [2025-03-09 02:39:56,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:56,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:39:56,514 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 105 statements into 2 equivalence classes. [2025-03-09 02:39:56,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 105 of 105 statements. [2025-03-09 02:39:56,523 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:56,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 31 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2025-03-09 02:39:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:39:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359552493] [2025-03-09 02:39:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359552493] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:39:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867497468] [2025-03-09 02:39:56,586 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 02:39:56,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:39:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:39:56,588 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 02:39:56,590 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 02:39:56,628 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 105 statements into 2 equivalence classes. [2025-03-09 02:39:56,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 105 of 105 statements. [2025-03-09 02:39:56,648 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 02:39:56,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:39:56,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-09 02:39:56,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:39:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2025-03-09 02:39:56,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:39:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-09 02:39:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867497468] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:39:56,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:39:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 11 [2025-03-09 02:39:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191974491] [2025-03-09 02:39:56,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:39:56,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 02:39:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:39:56,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 02:39:56,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-09 02:39:56,902 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 02:39:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:39:58,513 INFO L93 Difference]: Finished difference Result 22118 states and 33837 transitions. [2025-03-09 02:39:58,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 02:39:58,513 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 105 [2025-03-09 02:39:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:39:58,571 INFO L225 Difference]: With dead ends: 22118 [2025-03-09 02:39:58,571 INFO L226 Difference]: Without dead ends: 12286 [2025-03-09 02:39:58,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 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 02:39:58,617 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:39:58,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 88 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:39:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12286 states. [2025-03-09 02:39:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12286 to 10000. [2025-03-09 02:39:59,924 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 02:39:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 14318 transitions. [2025-03-09 02:39:59,956 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 14318 transitions. Word has length 105 [2025-03-09 02:39:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:39:59,956 INFO L471 AbstractCegarLoop]: Abstraction has 10000 states and 14318 transitions. [2025-03-09 02:39:59,956 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 02:39:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 14318 transitions. [2025-03-09 02:39:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-09 02:39:59,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:39:59,959 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 02:39:59,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-09 02:40:00,159 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 02:40:00,160 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:00,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash -456104179, now seen corresponding path program 3 times [2025-03-09 02:40:00,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:00,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984023546] [2025-03-09 02:40:00,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:00,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:00,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 7 equivalence classes. [2025-03-09 02:40:00,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 86 of 100 statements. [2025-03-09 02:40:00,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 02:40:00,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:00,273 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 02:40:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984023546] [2025-03-09 02:40:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984023546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087170829] [2025-03-09 02:40:00,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:00,276 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 02:40:00,285 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 02:40:00,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 7 equivalence classes. [2025-03-09 02:40:00,353 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 86 of 100 statements. [2025-03-09 02:40:00,353 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 02:40:00,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:00,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 02:40:00,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:00,407 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 02:40:00,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:00,930 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 02:40:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087170829] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:00,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:00,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 15 [2025-03-09 02:40:00,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138234304] [2025-03-09 02:40:00,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:00,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-09 02:40:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:00,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-09 02:40:00,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-09 02:40:00,931 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 02:40:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:02,281 INFO L93 Difference]: Finished difference Result 20552 states and 34945 transitions. [2025-03-09 02:40:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 02:40:02,282 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 02:40:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:02,361 INFO L225 Difference]: With dead ends: 20552 [2025-03-09 02:40:02,361 INFO L226 Difference]: Without dead ends: 11109 [2025-03-09 02:40:02,420 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 02:40:02,421 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 66 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:02,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 02:40:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11109 states. [2025-03-09 02:40:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11109 to 6185. [2025-03-09 02:40:03,395 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 02:40:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 7588 transitions. [2025-03-09 02:40:03,422 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 7588 transitions. Word has length 100 [2025-03-09 02:40:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:03,423 INFO L471 AbstractCegarLoop]: Abstraction has 6185 states and 7588 transitions. [2025-03-09 02:40:03,423 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 02:40:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 7588 transitions. [2025-03-09 02:40:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-09 02:40:03,425 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:03,425 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 02:40:03,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-09 02:40:03,626 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 02:40:03,626 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:03,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1767133044, now seen corresponding path program 3 times [2025-03-09 02:40:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481774144] [2025-03-09 02:40:03,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:03,633 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 104 statements into 10 equivalence classes. [2025-03-09 02:40:03,654 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 104 of 104 statements. [2025-03-09 02:40:03,654 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-09 02:40:03,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:04,035 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 02:40:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481774144] [2025-03-09 02:40:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481774144] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102401743] [2025-03-09 02:40:04,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:04,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:04,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:04,039 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 02:40:04,040 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 02:40:04,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 104 statements into 10 equivalence classes. [2025-03-09 02:40:04,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 104 of 104 statements. [2025-03-09 02:40:04,112 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-09 02:40:04,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:04,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-09 02:40:04,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:04,170 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 02:40:04,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:04,940 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 02:40:04,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102401743] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:04,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:04,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 22] total 43 [2025-03-09 02:40:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595970494] [2025-03-09 02:40:04,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:04,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-09 02:40:04,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:04,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-09 02:40:04,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2025-03-09 02:40:04,942 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 02:40:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:06,648 INFO L93 Difference]: Finished difference Result 11662 states and 14984 transitions. [2025-03-09 02:40:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-09 02:40:06,648 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 02:40:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:06,695 INFO L225 Difference]: With dead ends: 11662 [2025-03-09 02:40:06,695 INFO L226 Difference]: Without dead ends: 6110 [2025-03-09 02:40:06,721 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 02:40:06,722 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 181 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:06,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 453 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:40:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2025-03-09 02:40:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 6028. [2025-03-09 02:40:07,656 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 02:40:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 7324 transitions. [2025-03-09 02:40:07,678 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 7324 transitions. Word has length 104 [2025-03-09 02:40:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:07,678 INFO L471 AbstractCegarLoop]: Abstraction has 6028 states and 7324 transitions. [2025-03-09 02:40:07,678 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 02:40:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 7324 transitions. [2025-03-09 02:40:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-09 02:40:07,681 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:07,681 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2025-03-09 02:40:07,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-09 02:40:07,881 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 02:40:07,881 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:07,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1997819510, now seen corresponding path program 3 times [2025-03-09 02:40:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095378816] [2025-03-09 02:40:07,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:07,885 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-03-09 02:40:07,896 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-03-09 02:40:07,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-09 02:40:07,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:08,164 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 02:40:08,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095378816] [2025-03-09 02:40:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095378816] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586664279] [2025-03-09 02:40:08,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 02:40:08,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:08,167 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 02:40:08,168 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 02:40:08,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-03-09 02:40:08,238 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-03-09 02:40:08,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-09 02:40:08,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:08,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-09 02:40:08,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:08,320 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 02:40:08,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:08,766 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 02:40:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586664279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:08,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-03-09 02:40:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645392125] [2025-03-09 02:40:08,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:08,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-09 02:40:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:08,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-09 02:40:08,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2025-03-09 02:40:08,768 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 02:40:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:10,903 INFO L93 Difference]: Finished difference Result 10945 states and 13321 transitions. [2025-03-09 02:40:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-09 02:40:10,904 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 02:40:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:10,941 INFO L225 Difference]: With dead ends: 10945 [2025-03-09 02:40:10,941 INFO L226 Difference]: Without dead ends: 10944 [2025-03-09 02:40:10,945 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 02:40:10,946 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 900 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:10,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 605 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:40:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2025-03-09 02:40:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10900. [2025-03-09 02:40:12,291 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 02:40:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10900 states to 10900 states and 13264 transitions. [2025-03-09 02:40:12,320 INFO L78 Accepts]: Start accepts. Automaton has 10900 states and 13264 transitions. Word has length 91 [2025-03-09 02:40:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:12,320 INFO L471 AbstractCegarLoop]: Abstraction has 10900 states and 13264 transitions. [2025-03-09 02:40:12,321 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 02:40:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10900 states and 13264 transitions. [2025-03-09 02:40:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-09 02:40:12,323 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:12,323 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 02:40:12,329 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 02:40:12,523 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 02:40:12,524 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:12,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2745563, now seen corresponding path program 4 times [2025-03-09 02:40:12,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817036836] [2025-03-09 02:40:12,524 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 02:40:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:12,529 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-09 02:40:12,537 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 02:40:12,537 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 02:40:12,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:12,847 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 02:40:12,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:12,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817036836] [2025-03-09 02:40:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817036836] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754669608] [2025-03-09 02:40:12,848 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 02:40:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:12,850 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 02:40:12,852 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 02:40:12,908 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-09 02:40:12,925 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 02:40:12,926 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 02:40:12,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:12,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 02:40:12,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:12,969 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 02:40:12,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:14,342 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 02:40:14,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754669608] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:14,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:14,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 40 [2025-03-09 02:40:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988126255] [2025-03-09 02:40:14,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:14,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-09 02:40:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:14,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-09 02:40:14,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2025-03-09 02:40:14,344 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 02:40:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 02:40:20,904 INFO L93 Difference]: Finished difference Result 40082 states and 58409 transitions. [2025-03-09 02:40:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2025-03-09 02:40:20,905 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 02:40:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 02:40:21,061 INFO L225 Difference]: With dead ends: 40082 [2025-03-09 02:40:21,061 INFO L226 Difference]: Without dead ends: 38981 [2025-03-09 02:40:21,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8927 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4423, Invalid=22637, Unknown=0, NotChecked=0, Total=27060 [2025-03-09 02:40:21,095 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 214 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-09 02:40:21,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 342 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-09 02:40:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38981 states. [2025-03-09 02:40:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38981 to 18407. [2025-03-09 02:40:24,245 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 02:40:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18407 states to 18407 states and 23363 transitions. [2025-03-09 02:40:24,307 INFO L78 Accepts]: Start accepts. Automaton has 18407 states and 23363 transitions. Word has length 91 [2025-03-09 02:40:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 02:40:24,307 INFO L471 AbstractCegarLoop]: Abstraction has 18407 states and 23363 transitions. [2025-03-09 02:40:24,307 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 02:40:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 18407 states and 23363 transitions. [2025-03-09 02:40:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2025-03-09 02:40:24,320 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 02:40:24,320 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 02:40:24,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-09 02:40:24,520 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 02:40:24,520 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-09 02:40:24,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 02:40:24,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1870843355, now seen corresponding path program 5 times [2025-03-09 02:40:24,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 02:40:24,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883791090] [2025-03-09 02:40:24,521 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 02:40:24,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 02:40:24,526 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 167 statements into 13 equivalence classes. [2025-03-09 02:40:24,549 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 167 of 167 statements. [2025-03-09 02:40:24,550 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-09 02:40:24,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:25,248 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 02:40:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 02:40:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883791090] [2025-03-09 02:40:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883791090] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 02:40:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438762080] [2025-03-09 02:40:25,249 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 02:40:25,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 02:40:25,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 02:40:25,251 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 02:40:25,252 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 02:40:25,314 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 167 statements into 13 equivalence classes. [2025-03-09 02:40:25,344 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 167 of 167 statements. [2025-03-09 02:40:25,344 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-09 02:40:25,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 02:40:25,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-09 02:40:25,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 02:40:25,427 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 02:40:25,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 02:40:32,809 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 02:40:32,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438762080] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 02:40:32,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 02:40:32,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 43] total 72 [2025-03-09 02:40:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503888443] [2025-03-09 02:40:32,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 02:40:32,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-09 02:40:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 02:40:32,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-09 02:40:32,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4646, Unknown=0, NotChecked=0, Total=5256 [2025-03-09 02:40:32,811 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)