./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 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/termination-numeric/Ackermann01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:48:27,732 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:48:27,796 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2025-03-17 14:48:27,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:48:27,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:48:27,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:48:27,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:48:27,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:48:27,827 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:48:27,827 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:48:27,828 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:48:27,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:48:27,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:48:27,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:48:27,829 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:48:27,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:48:27,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 14:48:27,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:48:27,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:48:27,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:48:27,830 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:48:27,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:48:27,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:48:27,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:48:27,831 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 14:48:27,831 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 14:48:27,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:48:27,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:48:27,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:48:27,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:48:27,832 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:48:27,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:48:27,832 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2025-03-17 14:48:28,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:48:28,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:48:28,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:48:28,087 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:48:28,087 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:48:28,091 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2025-03-17 14:48:29,230 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85f52bc4/71aa3581913d4a4eae1cd7e97c736db0/FLAG928254caa [2025-03-17 14:48:29,473 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:48:29,473 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2025-03-17 14:48:29,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85f52bc4/71aa3581913d4a4eae1cd7e97c736db0/FLAG928254caa [2025-03-17 14:48:29,802 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85f52bc4/71aa3581913d4a4eae1cd7e97c736db0 [2025-03-17 14:48:29,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:48:29,805 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:48:29,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:48:29,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:48:29,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:48:29,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:29,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c453938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29, skipping insertion in model container [2025-03-17 14:48:29,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:29,822 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:48:29,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:48:29,934 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:48:29,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:48:29,955 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:48:29,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29 WrapperNode [2025-03-17 14:48:29,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:48:29,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:48:29,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:48:29,957 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:48:29,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:29,967 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:29,978 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2025-03-17 14:48:29,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:48:29,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:48:29,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:48:29,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:48:29,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:29,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:29,990 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,000 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]. [2025-03-17 14:48:30,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,004 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:48:30,011 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:48:30,012 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:48:30,012 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:48:30,013 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (1/1) ... [2025-03-17 14:48:30,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:48:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:30,039 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) [2025-03-17 14:48:30,043 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 [2025-03-17 14:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:48:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-03-17 14:48:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-03-17 14:48:30,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:48:30,100 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:48:30,102 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:48:30,203 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: havoc #t~ret5;havoc #t~ret6; [2025-03-17 14:48:30,204 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L21: havoc #t~ret4; [2025-03-17 14:48:30,210 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2025-03-17 14:48:30,210 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:48:30,216 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:48:30,216 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:48:30,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:48:30 BoogieIcfgContainer [2025-03-17 14:48:30,216 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:48:30,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:48:30,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:48:30,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:48:30,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:48:29" (1/3) ... [2025-03-17 14:48:30,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a11ddfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:48:30, skipping insertion in model container [2025-03-17 14:48:30,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:48:29" (2/3) ... [2025-03-17 14:48:30,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a11ddfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:48:30, skipping insertion in model container [2025-03-17 14:48:30,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:48:30" (3/3) ... [2025-03-17 14:48:30,225 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2025-03-17 14:48:30,234 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:48:30,235 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann01-1.c that has 2 procedures, 36 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2025-03-17 14:48:30,268 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:48:30,275 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;@ce1a624, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:48:30,275 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-17 14:48:30,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 30 states have internal predecessors, (35), 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) [2025-03-17 14:48:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-17 14:48:30,281 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:30,281 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:30,282 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:30,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1663941125, now seen corresponding path program 1 times [2025-03-17 14:48:30,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:30,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322842439] [2025-03-17 14:48:30,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:30,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:30,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:48:30,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:48:30,360 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:30,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:30,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322842439] [2025-03-17 14:48:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322842439] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:30,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:48:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:48:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713755183] [2025-03-17 14:48:30,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:30,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:48:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:30,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:48:30,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:48:30,499 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 30 states have internal predecessors, (35), 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 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-03-17 14:48:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:30,624 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2025-03-17 14:48:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:48:30,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2025-03-17 14:48:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:30,630 INFO L225 Difference]: With dead ends: 68 [2025-03-17 14:48:30,630 INFO L226 Difference]: Without dead ends: 58 [2025-03-17 14:48:30,632 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 [2025-03-17 14:48:30,636 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:30,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 115 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:48:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-17 14:48:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2025-03-17 14:48:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 41 states have internal predecessors, (51), 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) [2025-03-17 14:48:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2025-03-17 14:48:30,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 7 [2025-03-17 14:48:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:30,662 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2025-03-17 14:48:30,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2025-03-17 14:48:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2025-03-17 14:48:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 14:48:30,663 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:30,663 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:30,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:48:30,663 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:30,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash 42567331, now seen corresponding path program 1 times [2025-03-17 14:48:30,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:30,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107298407] [2025-03-17 14:48:30,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:30,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:48:30,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:48:30,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:30,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:30,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:30,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107298407] [2025-03-17 14:48:30,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107298407] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:30,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:48:30,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:48:30,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277783001] [2025-03-17 14:48:30,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:30,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:48:30,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:30,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:48:30,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:48:30,725 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. 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) [2025-03-17 14:48:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:30,813 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2025-03-17 14:48:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:48:30,814 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 [2025-03-17 14:48:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:30,815 INFO L225 Difference]: With dead ends: 81 [2025-03-17 14:48:30,817 INFO L226 Difference]: Without dead ends: 79 [2025-03-17 14:48:30,817 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 [2025-03-17 14:48:30,817 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 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 [2025-03-17 14:48:30,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:48:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-17 14:48:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2025-03-17 14:48:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5) internal successors, (72), 56 states have internal predecessors, (72), 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) [2025-03-17 14:48:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2025-03-17 14:48:30,827 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 8 [2025-03-17 14:48:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:30,827 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2025-03-17 14:48:30,828 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) [2025-03-17 14:48:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2025-03-17 14:48:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 14:48:30,828 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:30,828 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:30,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:48:30,828 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:30,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 42568164, now seen corresponding path program 1 times [2025-03-17 14:48:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305814731] [2025-03-17 14:48:30,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:30,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:48:30,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:48:30,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:30,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:30,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:30,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305814731] [2025-03-17 14:48:30,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305814731] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:30,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:48:30,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:48:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003861561] [2025-03-17 14:48:30,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:30,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:48:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:30,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:48:30,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:48:30,885 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2025-03-17 14:48:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:30,956 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2025-03-17 14:48:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:48:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2025-03-17 14:48:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:30,958 INFO L225 Difference]: With dead ends: 117 [2025-03-17 14:48:30,960 INFO L226 Difference]: Without dead ends: 107 [2025-03-17 14:48:30,960 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 [2025-03-17 14:48:30,961 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:30,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 14:48:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-17 14:48:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2025-03-17 14:48:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.452054794520548) internal successors, (106), 82 states have internal predecessors, (106), 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) [2025-03-17 14:48:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2025-03-17 14:48:30,977 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 8 [2025-03-17 14:48:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:30,977 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2025-03-17 14:48:30,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2025-03-17 14:48:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2025-03-17 14:48:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-17 14:48:30,979 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:30,979 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:30,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:48:30,979 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:30,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1319613086, now seen corresponding path program 1 times [2025-03-17 14:48:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628308943] [2025-03-17 14:48:30,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:30,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:48:30,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:48:30,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:30,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:31,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628308943] [2025-03-17 14:48:31,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628308943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:31,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:48:31,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:48:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138831091] [2025-03-17 14:48:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:31,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:48:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:31,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:48:31,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:48:31,048 INFO L87 Difference]: Start difference. First operand 101 states and 135 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) [2025-03-17 14:48:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:31,109 INFO L93 Difference]: Finished difference Result 109 states and 152 transitions. [2025-03-17 14:48:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:48:31,109 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 [2025-03-17 14:48:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:31,110 INFO L225 Difference]: With dead ends: 109 [2025-03-17 14:48:31,110 INFO L226 Difference]: Without dead ends: 107 [2025-03-17 14:48:31,111 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 [2025-03-17 14:48:31,111 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 50 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 [2025-03-17 14:48:31,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 50 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 14:48:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-17 14:48:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2025-03-17 14:48:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 80 states have internal predecessors, (96), 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) [2025-03-17 14:48:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2025-03-17 14:48:31,124 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 9 [2025-03-17 14:48:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:31,124 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2025-03-17 14:48:31,124 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) [2025-03-17 14:48:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2025-03-17 14:48:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-17 14:48:31,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:31,124 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:31,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:48:31,124 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:31,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1892559883, now seen corresponding path program 1 times [2025-03-17 14:48:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:31,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403167002] [2025-03-17 14:48:31,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:31,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:48:31,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:48:31,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:31,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:31,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403167002] [2025-03-17 14:48:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403167002] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:48:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:48:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341818950] [2025-03-17 14:48:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:31,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:48:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:31,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:48:31,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:48:31,169 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-03-17 14:48:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:31,217 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2025-03-17 14:48:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:48:31,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2025-03-17 14:48:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:31,218 INFO L225 Difference]: With dead ends: 169 [2025-03-17 14:48:31,218 INFO L226 Difference]: Without dead ends: 98 [2025-03-17 14:48:31,219 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 [2025-03-17 14:48:31,220 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 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 [2025-03-17 14:48:31,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 14:48:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-17 14:48:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2025-03-17 14:48:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.3) internal successors, (91), 77 states have internal predecessors, (91), 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) [2025-03-17 14:48:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2025-03-17 14:48:31,233 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 14 [2025-03-17 14:48:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:31,234 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2025-03-17 14:48:31,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2025-03-17 14:48:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2025-03-17 14:48:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-17 14:48:31,235 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:31,235 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:31,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:48:31,235 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:31,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1892559859, now seen corresponding path program 1 times [2025-03-17 14:48:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:31,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100642337] [2025-03-17 14:48:31,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:31,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:31,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:48:31,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:48:31,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:31,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100642337] [2025-03-17 14:48:31,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100642337] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:31,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206378123] [2025-03-17 14:48:31,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:31,323 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) [2025-03-17 14:48:31,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:48:31,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 14:48:31,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 14:48:31,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:31,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:31,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:48:31,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:31,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206378123] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:31,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-17 14:48:31,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908786364] [2025-03-17 14:48:31,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:31,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:48:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:31,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:48:31,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:48:31,491 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 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) [2025-03-17 14:48:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:31,718 INFO L93 Difference]: Finished difference Result 275 states and 358 transitions. [2025-03-17 14:48:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:48:31,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 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 14 [2025-03-17 14:48:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:31,721 INFO L225 Difference]: With dead ends: 275 [2025-03-17 14:48:31,721 INFO L226 Difference]: Without dead ends: 273 [2025-03-17 14:48:31,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:48:31,722 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:31,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 229 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 14:48:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-17 14:48:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 235. [2025-03-17 14:48:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 181 states have (on average 1.2651933701657458) internal successors, (229), 188 states have internal predecessors, (229), 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) [2025-03-17 14:48:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 298 transitions. [2025-03-17 14:48:31,750 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 298 transitions. Word has length 14 [2025-03-17 14:48:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:31,751 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 298 transitions. [2025-03-17 14:48:31,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 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) [2025-03-17 14:48:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 298 transitions. [2025-03-17 14:48:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-17 14:48:31,751 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:31,751 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:31,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:48:31,952 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 [2025-03-17 14:48:31,952 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:31,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1864099797, now seen corresponding path program 1 times [2025-03-17 14:48:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:31,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028414830] [2025-03-17 14:48:31,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:31,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:31,955 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:48:31,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:48:31,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:31,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:32,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:32,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028414830] [2025-03-17 14:48:32,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028414830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:32,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958763200] [2025-03-17 14:48:32,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:32,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:32,024 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) [2025-03-17 14:48:32,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:48:32,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:48:32,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:48:32,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:32,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:32,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 14:48:32,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:32,079 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:48:32,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958763200] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:32,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:48:32,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2025-03-17 14:48:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772095473] [2025-03-17 14:48:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:32,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:48:32,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:32,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:48:32,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:48:32,081 INFO L87 Difference]: Start difference. First operand 235 states and 298 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-17 14:48:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:32,167 INFO L93 Difference]: Finished difference Result 327 states and 436 transitions. [2025-03-17 14:48:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:48:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15 [2025-03-17 14:48:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:32,172 INFO L225 Difference]: With dead ends: 327 [2025-03-17 14:48:32,172 INFO L226 Difference]: Without dead ends: 326 [2025-03-17 14:48:32,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:48:32,175 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:32,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 87 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 14:48:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2025-03-17 14:48:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 292. [2025-03-17 14:48:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 226 states have (on average 1.261061946902655) internal successors, (285), 233 states have internal predecessors, (285), 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) [2025-03-17 14:48:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 372 transitions. [2025-03-17 14:48:32,211 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 372 transitions. Word has length 15 [2025-03-17 14:48:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:32,211 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 372 transitions. [2025-03-17 14:48:32,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-03-17 14:48:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 372 transitions. [2025-03-17 14:48:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-17 14:48:32,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:32,212 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:32,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:48:32,415 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 [2025-03-17 14:48:32,415 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:32,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash -529253750, now seen corresponding path program 1 times [2025-03-17 14:48:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572742464] [2025-03-17 14:48:32,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:32,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:32,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:48:32,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:48:32,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:32,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:32,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572742464] [2025-03-17 14:48:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572742464] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609075522] [2025-03-17 14:48:32,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:32,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:32,471 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) [2025-03-17 14:48:32,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:48:32,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:48:32,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:48:32,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:32,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:32,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:48:32,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:32,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:32,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609075522] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:32,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:32,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-17 14:48:32,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044936715] [2025-03-17 14:48:32,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:32,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:48:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:32,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:48:32,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:48:32,582 INFO L87 Difference]: Start difference. First operand 292 states and 372 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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) [2025-03-17 14:48:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:32,788 INFO L93 Difference]: Finished difference Result 576 states and 765 transitions. [2025-03-17 14:48:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:48:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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 18 [2025-03-17 14:48:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:32,791 INFO L225 Difference]: With dead ends: 576 [2025-03-17 14:48:32,792 INFO L226 Difference]: Without dead ends: 575 [2025-03-17 14:48:32,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:48:32,793 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 159 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:32,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 186 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:48:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2025-03-17 14:48:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 520. [2025-03-17 14:48:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 406 states have (on average 1.2044334975369457) internal successors, (489), 413 states have internal predecessors, (489), 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) [2025-03-17 14:48:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 648 transitions. [2025-03-17 14:48:32,826 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 648 transitions. Word has length 18 [2025-03-17 14:48:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:32,827 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 648 transitions. [2025-03-17 14:48:32,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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) [2025-03-17 14:48:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 648 transitions. [2025-03-17 14:48:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-17 14:48:32,827 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:32,827 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] [2025-03-17 14:48:32,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:48:33,032 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 [2025-03-17 14:48:33,032 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:33,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1124120106, now seen corresponding path program 1 times [2025-03-17 14:48:33,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:33,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008174973] [2025-03-17 14:48:33,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:33,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 14:48:33,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:48:33,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:33,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:48:33,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008174973] [2025-03-17 14:48:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008174973] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954111123] [2025-03-17 14:48:33,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:33,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:33,118 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) [2025-03-17 14:48:33,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:48:33,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 14:48:33,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 14:48:33,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:33,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:33,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:48:33,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:48:33,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:48:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954111123] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:33,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:33,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 14:48:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860479042] [2025-03-17 14:48:33,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:33,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:48:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:33,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:48:33,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:48:33,296 INFO L87 Difference]: Start difference. First operand 520 states and 648 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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) [2025-03-17 14:48:33,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:33,709 INFO L93 Difference]: Finished difference Result 1305 states and 1817 transitions. [2025-03-17 14:48:33,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:48:33,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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 23 [2025-03-17 14:48:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:33,715 INFO L225 Difference]: With dead ends: 1305 [2025-03-17 14:48:33,715 INFO L226 Difference]: Without dead ends: 914 [2025-03-17 14:48:33,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2025-03-17 14:48:33,720 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 138 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:33,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 97 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 14:48:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2025-03-17 14:48:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 714. [2025-03-17 14:48:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 559 states have (on average 1.1985688729874777) internal successors, (670), 580 states have internal predecessors, (670), 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) [2025-03-17 14:48:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 879 transitions. [2025-03-17 14:48:33,785 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 879 transitions. Word has length 23 [2025-03-17 14:48:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:33,785 INFO L471 AbstractCegarLoop]: Abstraction has 714 states and 879 transitions. [2025-03-17 14:48:33,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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) [2025-03-17 14:48:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 879 transitions. [2025-03-17 14:48:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-17 14:48:33,786 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:33,786 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] [2025-03-17 14:48:33,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:33,989 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 [2025-03-17 14:48:33,989 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:33,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash 931369006, now seen corresponding path program 1 times [2025-03-17 14:48:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:33,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181163186] [2025-03-17 14:48:33,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:33,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:33,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:48:33,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:48:33,996 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:33,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:48:34,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:34,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181163186] [2025-03-17 14:48:34,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181163186] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:34,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120451130] [2025-03-17 14:48:34,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:34,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:34,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:34,067 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) [2025-03-17 14:48:34,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:48:34,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:48:34,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:48:34,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:34,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:34,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 14:48:34,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:48:34,131 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:48:34,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120451130] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:48:34,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:48:34,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2025-03-17 14:48:34,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962821292] [2025-03-17 14:48:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:34,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:48:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:34,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:48:34,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:48:34,133 INFO L87 Difference]: Start difference. First operand 714 states and 879 transitions. Second operand has 5 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2025-03-17 14:48:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:34,230 INFO L93 Difference]: Finished difference Result 761 states and 975 transitions. [2025-03-17 14:48:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:48:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 27 [2025-03-17 14:48:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:34,234 INFO L225 Difference]: With dead ends: 761 [2025-03-17 14:48:34,235 INFO L226 Difference]: Without dead ends: 760 [2025-03-17 14:48:34,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:48:34,238 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:34,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 106 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 14:48:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2025-03-17 14:48:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 685. [2025-03-17 14:48:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 533 states have (on average 1.1782363977485928) internal successors, (628), 555 states have internal predecessors, (628), 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) [2025-03-17 14:48:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 835 transitions. [2025-03-17 14:48:34,301 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 835 transitions. Word has length 27 [2025-03-17 14:48:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:34,302 INFO L471 AbstractCegarLoop]: Abstraction has 685 states and 835 transitions. [2025-03-17 14:48:34,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2025-03-17 14:48:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 835 transitions. [2025-03-17 14:48:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-17 14:48:34,303 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:34,303 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] [2025-03-17 14:48:34,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:34,503 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 [2025-03-17 14:48:34,504 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:34,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1346954709, now seen corresponding path program 1 times [2025-03-17 14:48:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:34,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537309244] [2025-03-17 14:48:34,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:34,507 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:48:34,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:48:34,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:34,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:34,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:34,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537309244] [2025-03-17 14:48:34,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537309244] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:34,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796527898] [2025-03-17 14:48:34,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:34,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:34,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:34,596 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) [2025-03-17 14:48:34,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:48:34,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:48:34,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:48:34,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:34,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:34,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:48:34,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:34,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796527898] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:34,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:48:34,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-17 14:48:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862842470] [2025-03-17 14:48:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:34,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:48:34,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:34,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:48:34,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:48:34,829 INFO L87 Difference]: Start difference. First operand 685 states and 835 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2025-03-17 14:48:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:35,027 INFO L93 Difference]: Finished difference Result 792 states and 999 transitions. [2025-03-17 14:48:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:48:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 32 [2025-03-17 14:48:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:35,031 INFO L225 Difference]: With dead ends: 792 [2025-03-17 14:48:35,032 INFO L226 Difference]: Without dead ends: 791 [2025-03-17 14:48:35,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:48:35,033 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:35,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:48:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2025-03-17 14:48:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 684. [2025-03-17 14:48:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 533 states have (on average 1.170731707317073) internal successors, (624), 554 states have internal predecessors, (624), 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) [2025-03-17 14:48:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 831 transitions. [2025-03-17 14:48:35,078 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 831 transitions. Word has length 32 [2025-03-17 14:48:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:35,078 INFO L471 AbstractCegarLoop]: Abstraction has 684 states and 831 transitions. [2025-03-17 14:48:35,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2025-03-17 14:48:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 831 transitions. [2025-03-17 14:48:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-17 14:48:35,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:35,080 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] [2025-03-17 14:48:35,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:35,281 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 [2025-03-17 14:48:35,281 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:35,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1194076973, now seen corresponding path program 1 times [2025-03-17 14:48:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:35,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683274483] [2025-03-17 14:48:35,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:35,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:35,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 14:48:35,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:48:35,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:35,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683274483] [2025-03-17 14:48:35,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683274483] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:35,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772076588] [2025-03-17 14:48:35,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:35,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:35,393 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) [2025-03-17 14:48:35,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:48:35,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 14:48:35,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:48:35,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:35,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:35,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:48:35,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:35,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:35,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772076588] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:35,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:35,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-17 14:48:35,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784741979] [2025-03-17 14:48:35,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:35,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:48:35,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:35,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:48:35,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:48:35,608 INFO L87 Difference]: Start difference. First operand 684 states and 831 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 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) [2025-03-17 14:48:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:36,040 INFO L93 Difference]: Finished difference Result 1134 states and 1688 transitions. [2025-03-17 14:48:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:48:36,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 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 33 [2025-03-17 14:48:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:36,046 INFO L225 Difference]: With dead ends: 1134 [2025-03-17 14:48:36,046 INFO L226 Difference]: Without dead ends: 1133 [2025-03-17 14:48:36,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2025-03-17 14:48:36,048 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:36,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 200 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 14:48:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2025-03-17 14:48:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 944. [2025-03-17 14:48:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 704 states have (on average 1.1605113636363635) internal successors, (817), 739 states have internal predecessors, (817), 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) [2025-03-17 14:48:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1268 transitions. [2025-03-17 14:48:36,133 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1268 transitions. Word has length 33 [2025-03-17 14:48:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:36,133 INFO L471 AbstractCegarLoop]: Abstraction has 944 states and 1268 transitions. [2025-03-17 14:48:36,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 14 states have internal predecessors, (42), 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) [2025-03-17 14:48:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1268 transitions. [2025-03-17 14:48:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-17 14:48:36,134 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:36,134 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] [2025-03-17 14:48:36,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:48:36,339 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 [2025-03-17 14:48:36,339 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:36,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1835748889, now seen corresponding path program 1 times [2025-03-17 14:48:36,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:36,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942193001] [2025-03-17 14:48:36,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:36,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:48:36,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:48:36,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:36,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:48:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942193001] [2025-03-17 14:48:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942193001] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235852620] [2025-03-17 14:48:36,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:36,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:36,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:36,433 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) [2025-03-17 14:48:36,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:48:36,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:48:36,460 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:48:36,460 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:36,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:36,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:48:36,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:48:36,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:48:36,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235852620] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:36,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:36,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-17 14:48:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995900080] [2025-03-17 14:48:36,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:36,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:48:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:36,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:48:36,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:48:36,641 INFO L87 Difference]: Start difference. First operand 944 states and 1268 transitions. Second operand has 18 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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) [2025-03-17 14:48:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:37,031 INFO L93 Difference]: Finished difference Result 1153 states and 1561 transitions. [2025-03-17 14:48:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 14:48:37,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 34 [2025-03-17 14:48:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:37,036 INFO L225 Difference]: With dead ends: 1153 [2025-03-17 14:48:37,036 INFO L226 Difference]: Without dead ends: 1152 [2025-03-17 14:48:37,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2025-03-17 14:48:37,037 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 271 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:37,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 192 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 14:48:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2025-03-17 14:48:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 985. [2025-03-17 14:48:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 738 states have (on average 1.1612466124661247) internal successors, (857), 770 states have internal predecessors, (857), 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) [2025-03-17 14:48:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1315 transitions. [2025-03-17 14:48:37,127 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1315 transitions. Word has length 34 [2025-03-17 14:48:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:37,127 INFO L471 AbstractCegarLoop]: Abstraction has 985 states and 1315 transitions. [2025-03-17 14:48:37,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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) [2025-03-17 14:48:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1315 transitions. [2025-03-17 14:48:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-17 14:48:37,128 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:37,128 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] [2025-03-17 14:48:37,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:37,329 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 [2025-03-17 14:48:37,329 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:37,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -750879606, now seen corresponding path program 1 times [2025-03-17 14:48:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753963841] [2025-03-17 14:48:37,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:37,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:48:37,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:48:37,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:37,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753963841] [2025-03-17 14:48:37,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753963841] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553333981] [2025-03-17 14:48:37,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:37,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:37,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:37,412 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) [2025-03-17 14:48:37,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:48:37,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:48:37,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:48:37,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:37,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:37,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:48:37,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:37,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553333981] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:37,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:48:37,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-17 14:48:37,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681969555] [2025-03-17 14:48:37,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:48:37,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:48:37,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:37,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:48:37,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:48:37,663 INFO L87 Difference]: Start difference. First operand 985 states and 1315 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2025-03-17 14:48:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:37,880 INFO L93 Difference]: Finished difference Result 1135 states and 1593 transitions. [2025-03-17 14:48:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:48:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 35 [2025-03-17 14:48:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:37,885 INFO L225 Difference]: With dead ends: 1135 [2025-03-17 14:48:37,885 INFO L226 Difference]: Without dead ends: 1134 [2025-03-17 14:48:37,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:48:37,886 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:37,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 189 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:48:37,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2025-03-17 14:48:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 993. [2025-03-17 14:48:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 746 states have (on average 1.155495978552279) internal successors, (862), 774 states have internal predecessors, (862), 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) [2025-03-17 14:48:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1264 transitions. [2025-03-17 14:48:37,964 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1264 transitions. Word has length 35 [2025-03-17 14:48:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:37,964 INFO L471 AbstractCegarLoop]: Abstraction has 993 states and 1264 transitions. [2025-03-17 14:48:37,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2025-03-17 14:48:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1264 transitions. [2025-03-17 14:48:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-17 14:48:37,965 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:37,966 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-17 14:48:37,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:38,170 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 [2025-03-17 14:48:38,170 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:38,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1927226598, now seen corresponding path program 2 times [2025-03-17 14:48:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:38,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053007402] [2025-03-17 14:48:38,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:38,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:38,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:48:38,177 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:48:38,177 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:38,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053007402] [2025-03-17 14:48:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053007402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040144090] [2025-03-17 14:48:38,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:38,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:38,278 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) [2025-03-17 14:48:38,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:48:38,299 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:48:38,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:48:38,308 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:38,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:38,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:48:38,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:38,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:48:38,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040144090] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:38,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:38,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-17 14:48:38,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240899651] [2025-03-17 14:48:38,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:38,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:48:38,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:38,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:48:38,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:48:38,494 INFO L87 Difference]: Start difference. First operand 993 states and 1264 transitions. Second operand has 24 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 14 states have internal predecessors, (72), 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) [2025-03-17 14:48:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:38,983 INFO L93 Difference]: Finished difference Result 1988 states and 2569 transitions. [2025-03-17 14:48:38,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:48:38,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 14 states have internal predecessors, (72), 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 42 [2025-03-17 14:48:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:38,990 INFO L225 Difference]: With dead ends: 1988 [2025-03-17 14:48:38,990 INFO L226 Difference]: Without dead ends: 1987 [2025-03-17 14:48:38,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 14:48:38,992 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 424 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:38,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 359 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 14:48:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2025-03-17 14:48:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1708. [2025-03-17 14:48:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1281 states have (on average 1.1366120218579234) internal successors, (1456), 1335 states have internal predecessors, (1456), 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) [2025-03-17 14:48:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2134 transitions. [2025-03-17 14:48:39,125 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2134 transitions. Word has length 42 [2025-03-17 14:48:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:39,125 INFO L471 AbstractCegarLoop]: Abstraction has 1708 states and 2134 transitions. [2025-03-17 14:48:39,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 14 states have internal predecessors, (72), 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) [2025-03-17 14:48:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2134 transitions. [2025-03-17 14:48:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-17 14:48:39,128 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:39,128 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] [2025-03-17 14:48:39,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 14:48:39,328 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 [2025-03-17 14:48:39,328 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:39,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1536593082, now seen corresponding path program 2 times [2025-03-17 14:48:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:39,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200633071] [2025-03-17 14:48:39,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:39,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:39,331 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-17 14:48:39,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 14:48:39,335 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:39,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:39,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200633071] [2025-03-17 14:48:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200633071] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018980794] [2025-03-17 14:48:39,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:39,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:39,422 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) [2025-03-17 14:48:39,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:48:39,448 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-17 14:48:39,460 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 14:48:39,460 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:39,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:39,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 14:48:39,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:39,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:48:39,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018980794] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:39,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:39,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2025-03-17 14:48:39,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177660068] [2025-03-17 14:48:39,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:39,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:48:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:39,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:48:39,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:48:39,682 INFO L87 Difference]: Start difference. First operand 1708 states and 2134 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 16 states have internal predecessors, (60), 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) [2025-03-17 14:48:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:40,521 INFO L93 Difference]: Finished difference Result 3696 states and 5358 transitions. [2025-03-17 14:48:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-17 14:48:40,521 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 16 states have internal predecessors, (60), 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 43 [2025-03-17 14:48:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:40,530 INFO L225 Difference]: With dead ends: 3696 [2025-03-17 14:48:40,530 INFO L226 Difference]: Without dead ends: 2572 [2025-03-17 14:48:40,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 14:48:40,537 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 189 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:40,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 319 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:48:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2025-03-17 14:48:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1887. [2025-03-17 14:48:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1418 states have (on average 1.1311706629055007) internal successors, (1604), 1478 states have internal predecessors, (1604), 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) [2025-03-17 14:48:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2340 transitions. [2025-03-17 14:48:40,720 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2340 transitions. Word has length 43 [2025-03-17 14:48:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:40,720 INFO L471 AbstractCegarLoop]: Abstraction has 1887 states and 2340 transitions. [2025-03-17 14:48:40,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 16 states have internal predecessors, (60), 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) [2025-03-17 14:48:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2340 transitions. [2025-03-17 14:48:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-17 14:48:40,722 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:40,722 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] [2025-03-17 14:48:40,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:40,925 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 [2025-03-17 14:48:40,925 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:40,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash -713566482, now seen corresponding path program 1 times [2025-03-17 14:48:40,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:40,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033449858] [2025-03-17 14:48:40,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:40,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:40,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-17 14:48:40,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:48:40,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:40,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-17 14:48:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033449858] [2025-03-17 14:48:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033449858] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104323249] [2025-03-17 14:48:40,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:40,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:41,001 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) [2025-03-17 14:48:41,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:48:41,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-17 14:48:41,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:48:41,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:41,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:41,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:48:41,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 14:48:41,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 14:48:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104323249] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:41,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2025-03-17 14:48:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85882492] [2025-03-17 14:48:41,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:41,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:48:41,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:41,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:48:41,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:48:41,132 INFO L87 Difference]: Start difference. First operand 1887 states and 2340 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 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) [2025-03-17 14:48:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:41,347 INFO L93 Difference]: Finished difference Result 2109 states and 2762 transitions. [2025-03-17 14:48:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:48:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 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 50 [2025-03-17 14:48:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:41,359 INFO L225 Difference]: With dead ends: 2109 [2025-03-17 14:48:41,359 INFO L226 Difference]: Without dead ends: 2009 [2025-03-17 14:48:41,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:48:41,361 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:41,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 139 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:48:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2025-03-17 14:48:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1893. [2025-03-17 14:48:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1424 states have (on average 1.1299157303370786) internal successors, (1609), 1482 states have internal predecessors, (1609), 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) [2025-03-17 14:48:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2345 transitions. [2025-03-17 14:48:41,514 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2345 transitions. Word has length 50 [2025-03-17 14:48:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:41,514 INFO L471 AbstractCegarLoop]: Abstraction has 1893 states and 2345 transitions. [2025-03-17 14:48:41,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 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) [2025-03-17 14:48:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2345 transitions. [2025-03-17 14:48:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-17 14:48:41,516 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:41,516 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] [2025-03-17 14:48:41,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:41,720 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 [2025-03-17 14:48:41,720 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:41,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash -936059015, now seen corresponding path program 2 times [2025-03-17 14:48:41,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:41,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270309001] [2025-03-17 14:48:41,721 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:41,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:41,724 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-17 14:48:41,729 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:48:41,729 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:41,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:48:41,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270309001] [2025-03-17 14:48:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270309001] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316718417] [2025-03-17 14:48:41,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:41,835 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) [2025-03-17 14:48:41,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:48:41,858 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-17 14:48:41,869 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:48:41,869 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:41,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:41,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:48:41,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:48:41,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:48:42,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316718417] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:42,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:42,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-17 14:48:42,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406137812] [2025-03-17 14:48:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:42,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:48:42,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:42,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:48:42,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:48:42,115 INFO L87 Difference]: Start difference. First operand 1893 states and 2345 transitions. Second operand has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 18 states have internal predecessors, (70), 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) [2025-03-17 14:48:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:42,820 INFO L93 Difference]: Finished difference Result 2408 states and 3100 transitions. [2025-03-17 14:48:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-17 14:48:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 18 states have internal predecessors, (70), 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 50 [2025-03-17 14:48:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:42,828 INFO L225 Difference]: With dead ends: 2408 [2025-03-17 14:48:42,828 INFO L226 Difference]: Without dead ends: 2407 [2025-03-17 14:48:42,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=1937, Unknown=0, NotChecked=0, Total=2450 [2025-03-17 14:48:42,829 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 439 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:42,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 321 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 14:48:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2025-03-17 14:48:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1936. [2025-03-17 14:48:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1458 states have (on average 1.1310013717421126) internal successors, (1649), 1514 states have internal predecessors, (1649), 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) [2025-03-17 14:48:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2394 transitions. [2025-03-17 14:48:42,996 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2394 transitions. Word has length 50 [2025-03-17 14:48:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:42,997 INFO L471 AbstractCegarLoop]: Abstraction has 1936 states and 2394 transitions. [2025-03-17 14:48:42,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 18 states have internal predecessors, (70), 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) [2025-03-17 14:48:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2394 transitions. [2025-03-17 14:48:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-17 14:48:42,999 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:42,999 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] [2025-03-17 14:48:43,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:43,199 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 [2025-03-17 14:48:43,199 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:43,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1042822613, now seen corresponding path program 1 times [2025-03-17 14:48:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:43,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716551309] [2025-03-17 14:48:43,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:43,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-17 14:48:43,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-17 14:48:43,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:43,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:48:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716551309] [2025-03-17 14:48:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716551309] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829166602] [2025-03-17 14:48:43,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:43,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:43,359 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) [2025-03-17 14:48:43,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:48:43,385 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-17 14:48:43,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-17 14:48:43,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:43,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:43,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:48:43,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-17 14:48:43,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:48:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829166602] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:43,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:43,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-17 14:48:43,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960511272] [2025-03-17 14:48:43,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:43,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:48:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:43,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:48:43,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:48:43,814 INFO L87 Difference]: Start difference. First operand 1936 states and 2394 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 20 states have internal predecessors, (53), 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) [2025-03-17 14:48:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:45,352 INFO L93 Difference]: Finished difference Result 4672 states and 8175 transitions. [2025-03-17 14:48:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-17 14:48:45,356 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 20 states have internal predecessors, (53), 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 52 [2025-03-17 14:48:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:45,379 INFO L225 Difference]: With dead ends: 4672 [2025-03-17 14:48:45,379 INFO L226 Difference]: Without dead ends: 4671 [2025-03-17 14:48:45,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1475, Invalid=7081, Unknown=0, NotChecked=0, Total=8556 [2025-03-17 14:48:45,383 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:45,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 284 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:48:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2025-03-17 14:48:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 3295. [2025-03-17 14:48:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 2305 states have (on average 1.1019522776572668) internal successors, (2540), 2371 states have internal predecessors, (2540), 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) [2025-03-17 14:48:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 6055 transitions. [2025-03-17 14:48:45,728 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 6055 transitions. Word has length 52 [2025-03-17 14:48:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:45,728 INFO L471 AbstractCegarLoop]: Abstraction has 3295 states and 6055 transitions. [2025-03-17 14:48:45,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 20 states have internal predecessors, (53), 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) [2025-03-17 14:48:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 6055 transitions. [2025-03-17 14:48:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-17 14:48:45,730 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:45,730 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2025-03-17 14:48:45,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:48:45,934 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 [2025-03-17 14:48:45,934 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:45,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1748239440, now seen corresponding path program 1 times [2025-03-17 14:48:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:45,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083704432] [2025-03-17 14:48:45,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:45,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-17 14:48:45,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-17 14:48:45,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:45,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:48:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083704432] [2025-03-17 14:48:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083704432] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891506955] [2025-03-17 14:48:46,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:46,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:46,048 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) [2025-03-17 14:48:46,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:48:46,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-17 14:48:46,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-17 14:48:46,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:46,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:46,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:48:46,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:48:46,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-17 14:48:46,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891506955] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:46,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:46,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-17 14:48:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844046314] [2025-03-17 14:48:46,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:46,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:48:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:46,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:48:46,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:48:46,339 INFO L87 Difference]: Start difference. First operand 3295 states and 6055 transitions. Second operand has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 14 states have internal predecessors, (83), 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) [2025-03-17 14:48:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:47,418 INFO L93 Difference]: Finished difference Result 8934 states and 16869 transitions. [2025-03-17 14:48:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:48:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 14 states have internal predecessors, (83), 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 56 [2025-03-17 14:48:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:47,461 INFO L225 Difference]: With dead ends: 8934 [2025-03-17 14:48:47,461 INFO L226 Difference]: Without dead ends: 8932 [2025-03-17 14:48:47,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 14:48:47,466 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 556 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:47,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 345 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:48:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2025-03-17 14:48:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8719. [2025-03-17 14:48:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 6121 states have (on average 1.0991668028099983) internal successors, (6728), 6295 states have internal predecessors, (6728), 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) [2025-03-17 14:48:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 15973 transitions. [2025-03-17 14:48:48,510 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 15973 transitions. Word has length 56 [2025-03-17 14:48:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:48,511 INFO L471 AbstractCegarLoop]: Abstraction has 8719 states and 15973 transitions. [2025-03-17 14:48:48,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 14 states have internal predecessors, (83), 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) [2025-03-17 14:48:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 15973 transitions. [2025-03-17 14:48:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-17 14:48:48,512 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:48,512 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] [2025-03-17 14:48:48,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 14:48:48,717 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 [2025-03-17 14:48:48,717 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:48,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1424327710, now seen corresponding path program 1 times [2025-03-17 14:48:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200878498] [2025-03-17 14:48:48,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:48,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-17 14:48:48,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 14:48:48,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:48,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:48:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200878498] [2025-03-17 14:48:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200878498] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137263173] [2025-03-17 14:48:48,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:48:48,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:48,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:48,840 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) [2025-03-17 14:48:48,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:48:48,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-17 14:48:48,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 14:48:48,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:48:48,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:48,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:48:48,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-17 14:48:48,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:48:49,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137263173] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:49,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:49,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-17 14:48:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401852071] [2025-03-17 14:48:49,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:49,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:48:49,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:49,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:48:49,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:48:49,259 INFO L87 Difference]: Start difference. First operand 8719 states and 15973 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 20 states have internal predecessors, (57), 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) [2025-03-17 14:48:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:48:53,701 INFO L93 Difference]: Finished difference Result 37044 states and 112393 transitions. [2025-03-17 14:48:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-17 14:48:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 20 states have internal predecessors, (57), 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 54 [2025-03-17 14:48:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:48:53,943 INFO L225 Difference]: With dead ends: 37044 [2025-03-17 14:48:53,944 INFO L226 Difference]: Without dead ends: 28995 [2025-03-17 14:48:54,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1752, Invalid=7560, Unknown=0, NotChecked=0, Total=9312 [2025-03-17 14:48:54,236 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 171 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 14:48:54,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 416 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 14:48:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28995 states. [2025-03-17 14:48:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28995 to 20091. [2025-03-17 14:48:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20091 states, 13073 states have (on average 1.0577526199036182) internal successors, (13828), 13283 states have internal predecessors, (13828), 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) [2025-03-17 14:48:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20091 states to 20091 states and 62884 transitions. [2025-03-17 14:48:57,672 INFO L78 Accepts]: Start accepts. Automaton has 20091 states and 62884 transitions. Word has length 54 [2025-03-17 14:48:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:48:57,673 INFO L471 AbstractCegarLoop]: Abstraction has 20091 states and 62884 transitions. [2025-03-17 14:48:57,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 20 states have internal predecessors, (57), 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) [2025-03-17 14:48:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 20091 states and 62884 transitions. [2025-03-17 14:48:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-17 14:48:57,677 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:48:57,677 INFO L218 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:48:57,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 14:48:57,877 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 [2025-03-17 14:48:57,877 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:48:57,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:48:57,878 INFO L85 PathProgramCache]: Analyzing trace with hash 132286833, now seen corresponding path program 2 times [2025-03-17 14:48:57,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:48:57,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990065918] [2025-03-17 14:48:57,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:57,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:48:57,881 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-17 14:48:57,885 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-17 14:48:57,886 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:57,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 83 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-17 14:48:58,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:48:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990065918] [2025-03-17 14:48:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990065918] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:48:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576638319] [2025-03-17 14:48:58,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:48:58,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:48:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:48:58,055 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) [2025-03-17 14:48:58,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:48:58,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-17 14:48:58,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-17 14:48:58,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:48:58,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:48:58,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:48:58,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:48:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-17 14:48:58,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:48:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-17 14:48:58,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576638319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:48:58,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:48:58,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2025-03-17 14:48:58,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732741378] [2025-03-17 14:48:58,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:48:58,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 14:48:58,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:48:58,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 14:48:58,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2025-03-17 14:48:58,714 INFO L87 Difference]: Start difference. First operand 20091 states and 62884 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 22 states have internal predecessors, (73), 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) [2025-03-17 14:49:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:02,195 INFO L93 Difference]: Finished difference Result 34820 states and 105927 transitions. [2025-03-17 14:49:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-17 14:49:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 22 states have internal predecessors, (73), 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 79 [2025-03-17 14:49:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:02,287 INFO L225 Difference]: With dead ends: 34820 [2025-03-17 14:49:02,287 INFO L226 Difference]: Without dead ends: 15388 [2025-03-17 14:49:02,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1108, Invalid=5212, Unknown=0, NotChecked=0, Total=6320 [2025-03-17 14:49:02,587 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 161 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:02,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 370 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:49:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2025-03-17 14:49:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 12580. [2025-03-17 14:49:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12580 states, 8647 states have (on average 1.08823869550133) internal successors, (9410), 9008 states have internal predecessors, (9410), 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) [2025-03-17 14:49:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12580 states to 12580 states and 18133 transitions. [2025-03-17 14:49:04,000 INFO L78 Accepts]: Start accepts. Automaton has 12580 states and 18133 transitions. Word has length 79 [2025-03-17 14:49:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:04,000 INFO L471 AbstractCegarLoop]: Abstraction has 12580 states and 18133 transitions. [2025-03-17 14:49:04,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 22 states have internal predecessors, (73), 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) [2025-03-17 14:49:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 12580 states and 18133 transitions. [2025-03-17 14:49:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-17 14:49:04,005 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:04,005 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] [2025-03-17 14:49:04,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 14:49:04,205 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 [2025-03-17 14:49:04,206 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:04,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2057260839, now seen corresponding path program 3 times [2025-03-17 14:49:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:04,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112286729] [2025-03-17 14:49:04,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:04,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 66 statements into 7 equivalence classes. [2025-03-17 14:49:04,216 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 58 of 66 statements. [2025-03-17 14:49:04,216 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 14:49:04,216 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-17 14:49:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:04,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112286729] [2025-03-17 14:49:04,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112286729] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:49:04,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:49:04,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:49:04,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803578106] [2025-03-17 14:49:04,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:49:04,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:49:04,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:04,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:49:04,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:49:04,270 INFO L87 Difference]: Start difference. First operand 12580 states and 18133 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2025-03-17 14:49:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:05,431 INFO L93 Difference]: Finished difference Result 12680 states and 19704 transitions. [2025-03-17 14:49:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:49:05,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 66 [2025-03-17 14:49:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:05,472 INFO L225 Difference]: With dead ends: 12680 [2025-03-17 14:49:05,472 INFO L226 Difference]: Without dead ends: 10669 [2025-03-17 14:49:05,482 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 [2025-03-17 14:49:05,482 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 48 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 [2025-03-17 14:49:05,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 48 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 14:49:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2025-03-17 14:49:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10485. [2025-03-17 14:49:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10485 states, 6984 states have (on average 1.0564146620847652) internal successors, (7378), 7107 states have internal predecessors, (7378), 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) [2025-03-17 14:49:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10485 states to 10485 states and 15600 transitions. [2025-03-17 14:49:06,651 INFO L78 Accepts]: Start accepts. Automaton has 10485 states and 15600 transitions. Word has length 66 [2025-03-17 14:49:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:06,652 INFO L471 AbstractCegarLoop]: Abstraction has 10485 states and 15600 transitions. [2025-03-17 14:49:06,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2025-03-17 14:49:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10485 states and 15600 transitions. [2025-03-17 14:49:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-17 14:49:06,654 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:06,654 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] [2025-03-17 14:49:06,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 14:49:06,654 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:06,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:06,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2080662198, now seen corresponding path program 3 times [2025-03-17 14:49:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:06,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642808342] [2025-03-17 14:49:06,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:06,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:06,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 67 statements into 8 equivalence classes. [2025-03-17 14:49:06,664 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 67 of 67 statements. [2025-03-17 14:49:06,664 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-17 14:49:06,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 46 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-17 14:49:06,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:06,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642808342] [2025-03-17 14:49:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642808342] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:06,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193831416] [2025-03-17 14:49:06,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:06,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:06,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:06,820 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) [2025-03-17 14:49:06,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:49:06,857 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 67 statements into 8 equivalence classes. [2025-03-17 14:49:06,872 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 67 of 67 statements. [2025-03-17 14:49:06,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-17 14:49:06,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:06,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:49:06,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:49:07,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:49:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193831416] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:07,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:07,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2025-03-17 14:49:07,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377408017] [2025-03-17 14:49:07,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:07,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-17 14:49:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:07,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-17 14:49:07,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2025-03-17 14:49:07,385 INFO L87 Difference]: Start difference. First operand 10485 states and 15600 transitions. Second operand has 42 states, 42 states have (on average 3.119047619047619) internal successors, (131), 29 states have internal predecessors, (131), 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) [2025-03-17 14:49:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:09,506 INFO L93 Difference]: Finished difference Result 20432 states and 35843 transitions. [2025-03-17 14:49:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-17 14:49:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.119047619047619) internal successors, (131), 29 states have internal predecessors, (131), 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 67 [2025-03-17 14:49:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:09,582 INFO L225 Difference]: With dead ends: 20432 [2025-03-17 14:49:09,582 INFO L226 Difference]: Without dead ends: 10518 [2025-03-17 14:49:09,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2025-03-17 14:49:09,646 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 314 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:09,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 172 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:49:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2025-03-17 14:49:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 10234. [2025-03-17 14:49:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10234 states, 6681 states have (on average 1.0428079628798084) internal successors, (6967), 6812 states have internal predecessors, (6967), 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) [2025-03-17 14:49:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10234 states to 10234 states and 14698 transitions. [2025-03-17 14:49:11,020 INFO L78 Accepts]: Start accepts. Automaton has 10234 states and 14698 transitions. Word has length 67 [2025-03-17 14:49:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:11,020 INFO L471 AbstractCegarLoop]: Abstraction has 10234 states and 14698 transitions. [2025-03-17 14:49:11,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.119047619047619) internal successors, (131), 29 states have internal predecessors, (131), 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) [2025-03-17 14:49:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 10234 states and 14698 transitions. [2025-03-17 14:49:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-17 14:49:11,022 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:11,022 INFO L218 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 14:49:11,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-17 14:49:11,222 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 [2025-03-17 14:49:11,223 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:11,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1761499236, now seen corresponding path program 2 times [2025-03-17 14:49:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:11,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577644862] [2025-03-17 14:49:11,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:49:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:11,227 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 88 statements into 2 equivalence classes. [2025-03-17 14:49:11,231 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 88 of 88 statements. [2025-03-17 14:49:11,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:49:11,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 96 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2025-03-17 14:49:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:11,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577644862] [2025-03-17 14:49:11,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577644862] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68526278] [2025-03-17 14:49:11,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:49:11,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:11,289 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) [2025-03-17 14:49:11,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:49:11,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 88 statements into 2 equivalence classes. [2025-03-17 14:49:11,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 88 of 88 statements. [2025-03-17 14:49:11,345 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:49:11,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:11,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:49:11,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-03-17 14:49:11,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2025-03-17 14:49:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68526278] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:11,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:11,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 11 [2025-03-17 14:49:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108027035] [2025-03-17 14:49:11,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:11,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:49:11,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:11,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:49:11,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:49:11,613 INFO L87 Difference]: Start difference. First operand 10234 states and 14698 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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) [2025-03-17 14:49:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:13,109 INFO L93 Difference]: Finished difference Result 22117 states and 33836 transitions. [2025-03-17 14:49:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:49:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 88 [2025-03-17 14:49:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:13,171 INFO L225 Difference]: With dead ends: 22117 [2025-03-17 14:49:13,171 INFO L226 Difference]: Without dead ends: 12285 [2025-03-17 14:49:13,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:49:13,222 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:13,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 84 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:49:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12285 states. [2025-03-17 14:49:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12285 to 9999. [2025-03-17 14:49:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 6541 states have (on average 1.043724201192478) internal successors, (6827), 6672 states have internal predecessors, (6827), 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) [2025-03-17 14:49:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 14317 transitions. [2025-03-17 14:49:14,485 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 14317 transitions. Word has length 88 [2025-03-17 14:49:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:14,485 INFO L471 AbstractCegarLoop]: Abstraction has 9999 states and 14317 transitions. [2025-03-17 14:49:14,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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) [2025-03-17 14:49:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 14317 transitions. [2025-03-17 14:49:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-17 14:49:14,487 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:14,487 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] [2025-03-17 14:49:14,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-17 14:49:14,688 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 [2025-03-17 14:49:14,688 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:14,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash 103109594, now seen corresponding path program 3 times [2025-03-17 14:49:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613480427] [2025-03-17 14:49:14,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:14,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 7 equivalence classes. [2025-03-17 14:49:14,698 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 85 of 99 statements. [2025-03-17 14:49:14,698 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 14:49:14,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 127 proven. 43 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-17 14:49:14,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:14,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613480427] [2025-03-17 14:49:14,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613480427] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:14,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304068190] [2025-03-17 14:49:14,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:14,775 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) [2025-03-17 14:49:14,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 14:49:14,819 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 7 equivalence classes. [2025-03-17 14:49:14,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 85 of 99 statements. [2025-03-17 14:49:14,839 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 14:49:14,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:14,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:49:14,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-17 14:49:14,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-17 14:49:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304068190] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:15,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 15 [2025-03-17 14:49:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305309215] [2025-03-17 14:49:15,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:15,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:49:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:15,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:49:15,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:49:15,413 INFO L87 Difference]: Start difference. First operand 9999 states and 14317 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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) [2025-03-17 14:49:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:16,754 INFO L93 Difference]: Finished difference Result 20551 states and 34944 transitions. [2025-03-17 14:49:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:49:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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 99 [2025-03-17 14:49:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:16,801 INFO L225 Difference]: With dead ends: 20551 [2025-03-17 14:49:16,802 INFO L226 Difference]: Without dead ends: 11108 [2025-03-17 14:49:16,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:49:16,835 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:16,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 14:49:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11108 states. [2025-03-17 14:49:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11108 to 6184. [2025-03-17 14:49:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 4145 states have (on average 1.038118214716526) internal successors, (4303), 4257 states have internal predecessors, (4303), 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) [2025-03-17 14:49:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 7587 transitions. [2025-03-17 14:49:17,671 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 7587 transitions. Word has length 99 [2025-03-17 14:49:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:17,672 INFO L471 AbstractCegarLoop]: Abstraction has 6184 states and 7587 transitions. [2025-03-17 14:49:17,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 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) [2025-03-17 14:49:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 7587 transitions. [2025-03-17 14:49:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-17 14:49:17,674 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:17,674 INFO L218 NwaCegarLoop]: trace histogram [11, 9, 7, 7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:49:17,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 14:49:17,874 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 [2025-03-17 14:49:17,874 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:17,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash -474257615, now seen corresponding path program 3 times [2025-03-17 14:49:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284590587] [2025-03-17 14:49:17,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:17,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 95 statements into 10 equivalence classes. [2025-03-17 14:49:17,893 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 95 of 95 statements. [2025-03-17 14:49:17,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-17 14:49:17,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 139 proven. 91 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-17 14:49:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284590587] [2025-03-17 14:49:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284590587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443871052] [2025-03-17 14:49:18,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:18,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:18,218 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) [2025-03-17 14:49:18,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 14:49:18,268 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 95 statements into 10 equivalence classes. [2025-03-17 14:49:18,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 95 of 95 statements. [2025-03-17 14:49:18,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-17 14:49:18,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:18,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 14:49:18,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 131 proven. 94 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-17 14:49:18,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 151 proven. 79 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-17 14:49:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443871052] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:19,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:19,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 22] total 43 [2025-03-17 14:49:19,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199946394] [2025-03-17 14:49:19,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:19,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-17 14:49:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:19,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-17 14:49:19,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2025-03-17 14:49:19,034 INFO L87 Difference]: Start difference. First operand 6184 states and 7587 transitions. Second operand has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 28 states have internal predecessors, (115), 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) [2025-03-17 14:49:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:20,595 INFO L93 Difference]: Finished difference Result 11661 states and 14983 transitions. [2025-03-17 14:49:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-17 14:49:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 28 states have internal predecessors, (115), 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 95 [2025-03-17 14:49:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:20,620 INFO L225 Difference]: With dead ends: 11661 [2025-03-17 14:49:20,621 INFO L226 Difference]: Without dead ends: 6109 [2025-03-17 14:49:20,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1344, Invalid=5628, Unknown=0, NotChecked=0, Total=6972 [2025-03-17 14:49:20,637 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 234 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:20,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 447 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:49:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2025-03-17 14:49:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 6027. [2025-03-17 14:49:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 4058 states have (on average 1.0344997535731888) internal successors, (4198), 4170 states have internal predecessors, (4198), 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) [2025-03-17 14:49:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 7323 transitions. [2025-03-17 14:49:21,387 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 7323 transitions. Word has length 95 [2025-03-17 14:49:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:21,387 INFO L471 AbstractCegarLoop]: Abstraction has 6027 states and 7323 transitions. [2025-03-17 14:49:21,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 28 states have internal predecessors, (115), 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) [2025-03-17 14:49:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 7323 transitions. [2025-03-17 14:49:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-17 14:49:21,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:21,389 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2025-03-17 14:49:21,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-17 14:49:21,590 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 [2025-03-17 14:49:21,590 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:21,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1668025402, now seen corresponding path program 3 times [2025-03-17 14:49:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258301035] [2025-03-17 14:49:21,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:21,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 90 statements into 11 equivalence classes. [2025-03-17 14:49:21,606 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 90 of 90 statements. [2025-03-17 14:49:21,606 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 14:49:21,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:49:21,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:21,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258301035] [2025-03-17 14:49:21,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258301035] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:21,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275223054] [2025-03-17 14:49:21,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:49:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:21,882 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) [2025-03-17 14:49:21,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-17 14:49:21,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 90 statements into 11 equivalence classes. [2025-03-17 14:49:21,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 90 of 90 statements. [2025-03-17 14:49:21,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 14:49:21,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:21,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 14:49:21,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:49:22,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:49:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275223054] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:22,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-03-17 14:49:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450849271] [2025-03-17 14:49:22,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:22,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-17 14:49:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:22,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-17 14:49:22,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2025-03-17 14:49:22,537 INFO L87 Difference]: Start difference. First operand 6027 states and 7323 transitions. Second operand has 48 states, 45 states have (on average 3.466666666666667) internal successors, (156), 26 states have internal predecessors, (156), 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) [2025-03-17 14:49:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:24,411 INFO L93 Difference]: Finished difference Result 10944 states and 13320 transitions. [2025-03-17 14:49:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-17 14:49:24,412 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.466666666666667) internal successors, (156), 26 states have internal predecessors, (156), 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 90 [2025-03-17 14:49:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:24,444 INFO L225 Difference]: With dead ends: 10944 [2025-03-17 14:49:24,444 INFO L226 Difference]: Without dead ends: 10943 [2025-03-17 14:49:24,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2025-03-17 14:49:24,450 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 887 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:24,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 574 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:49:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10943 states. [2025-03-17 14:49:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10943 to 10899. [2025-03-17 14:49:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10899 states, 7274 states have (on average 1.0357437448446523) internal successors, (7534), 7494 states have internal predecessors, (7534), 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) [2025-03-17 14:49:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10899 states to 10899 states and 13263 transitions. [2025-03-17 14:49:25,873 INFO L78 Accepts]: Start accepts. Automaton has 10899 states and 13263 transitions. Word has length 90 [2025-03-17 14:49:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:25,873 INFO L471 AbstractCegarLoop]: Abstraction has 10899 states and 13263 transitions. [2025-03-17 14:49:25,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.466666666666667) internal successors, (156), 26 states have internal predecessors, (156), 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) [2025-03-17 14:49:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10899 states and 13263 transitions. [2025-03-17 14:49:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-17 14:49:25,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:25,876 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] [2025-03-17 14:49:25,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-17 14:49:26,076 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 [2025-03-17 14:49:26,076 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:26,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash -626376821, now seen corresponding path program 4 times [2025-03-17 14:49:26,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:26,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417385650] [2025-03-17 14:49:26,077 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:49:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:26,081 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-03-17 14:49:26,085 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-03-17 14:49:26,085 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:49:26,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 43 proven. 71 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2025-03-17 14:49:26,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:26,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417385650] [2025-03-17 14:49:26,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417385650] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:26,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491825640] [2025-03-17 14:49:26,370 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:49:26,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:26,372 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) [2025-03-17 14:49:26,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-17 14:49:26,426 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-03-17 14:49:26,444 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-03-17 14:49:26,445 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:49:26,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:26,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 14:49:26,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-17 14:49:26,490 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-17 14:49:27,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491825640] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:27,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:27,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 40 [2025-03-17 14:49:27,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017061919] [2025-03-17 14:49:27,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:27,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-17 14:49:27,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:27,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-17 14:49:27,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 14:49:27,742 INFO L87 Difference]: Start difference. First operand 10899 states and 13263 transitions. Second operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 31 states have internal predecessors, (74), 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) [2025-03-17 14:49:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 14:49:34,185 INFO L93 Difference]: Finished difference Result 40081 states and 58408 transitions. [2025-03-17 14:49:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2025-03-17 14:49:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.85) internal successors, (74), 31 states have internal predecessors, (74), 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 90 [2025-03-17 14:49:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 14:49:34,330 INFO L225 Difference]: With dead ends: 40081 [2025-03-17 14:49:34,330 INFO L226 Difference]: Without dead ends: 38980 [2025-03-17 14:49:34,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8903 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4423, Invalid=22637, Unknown=0, NotChecked=0, Total=27060 [2025-03-17 14:49:34,352 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 299 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 14:49:34,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 306 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 14:49:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38980 states. [2025-03-17 14:49:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38980 to 18406. [2025-03-17 14:49:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18406 states, 11854 states have (on average 1.0232832799055172) internal successors, (12130), 12064 states have internal predecessors, (12130), 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) [2025-03-17 14:49:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18406 states to 18406 states and 23362 transitions. [2025-03-17 14:49:37,557 INFO L78 Accepts]: Start accepts. Automaton has 18406 states and 23362 transitions. Word has length 90 [2025-03-17 14:49:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 14:49:37,557 INFO L471 AbstractCegarLoop]: Abstraction has 18406 states and 23362 transitions. [2025-03-17 14:49:37,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.85) internal successors, (74), 31 states have internal predecessors, (74), 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) [2025-03-17 14:49:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 18406 states and 23362 transitions. [2025-03-17 14:49:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2025-03-17 14:49:37,571 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 14:49:37,571 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] [2025-03-17 14:49:37,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-17 14:49:37,776 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 [2025-03-17 14:49:37,776 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 14:49:37,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:49:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 811498059, now seen corresponding path program 5 times [2025-03-17 14:49:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:49:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082745607] [2025-03-17 14:49:37,776 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:49:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:49:37,783 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 166 statements into 13 equivalence classes. [2025-03-17 14:49:37,814 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 166 of 166 statements. [2025-03-17 14:49:37,814 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-17 14:49:37,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 137 proven. 291 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2025-03-17 14:49:38,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:49:38,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082745607] [2025-03-17 14:49:38,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082745607] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:49:38,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695225747] [2025-03-17 14:49:38,552 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:49:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:49:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:49:38,554 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) [2025-03-17 14:49:38,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-17 14:49:38,625 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 166 statements into 13 equivalence classes. [2025-03-17 14:49:38,664 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 166 of 166 statements. [2025-03-17 14:49:38,664 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-17 14:49:38,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:49:38,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-17 14:49:38,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:49:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 98 proven. 285 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2025-03-17 14:49:38,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:49:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 114 proven. 409 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2025-03-17 14:49:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695225747] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:49:46,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:49:46,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 43] total 72 [2025-03-17 14:49:46,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655474297] [2025-03-17 14:49:46,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:49:46,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-17 14:49:46,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:49:46,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-17 14:49:46,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4646, Unknown=0, NotChecked=0, Total=5256 [2025-03-17 14:49:46,438 INFO L87 Difference]: Start difference. First operand 18406 states and 23362 transitions. Second operand has 73 states, 72 states have (on average 1.6388888888888888) internal successors, (118), 55 states have internal predecessors, (118), 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)