./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 11:26:42,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 11:26:42,676 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-04 11:26:42,681 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 11:26:42,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 11:26:42,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 11:26:42,713 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 11:26:42,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 11:26:42,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 11:26:42,714 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 11:26:42,714 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 11:26:42,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 11:26:42,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 11:26:42,715 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 11:26:42,715 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 11:26:42,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 11:26:42,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 11:26:42,716 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 11:26:42,717 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 11:26:42,717 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 11:26:42,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 11:26:42,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 11:26:42,718 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 11:26:42,718 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 11:26:42,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 11:26:42,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 11:26:42,718 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2025-03-04 11:26:42,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 11:26:42,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 11:26:42,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 11:26:42,914 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 11:26:42,914 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 11:26:42,915 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2025-03-04 11:26:43,997 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0b5485a/381a8fbe05304145b4b5318b786e671b/FLAGa2cb32d1c [2025-03-04 11:26:44,208 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 11:26:44,208 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2025-03-04 11:26:44,213 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0b5485a/381a8fbe05304145b4b5318b786e671b/FLAGa2cb32d1c [2025-03-04 11:26:44,559 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0b5485a/381a8fbe05304145b4b5318b786e671b [2025-03-04 11:26:44,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 11:26:44,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 11:26:44,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 11:26:44,564 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 11:26:44,567 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 11:26:44,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ca4528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44, skipping insertion in model container [2025-03-04 11:26:44,568 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,576 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 11:26:44,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 11:26:44,674 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 11:26:44,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 11:26:44,695 INFO L204 MainTranslator]: Completed translation [2025-03-04 11:26:44,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44 WrapperNode [2025-03-04 11:26:44,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 11:26:44,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 11:26:44,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 11:26:44,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 11:26:44,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,705 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,716 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2025-03-04 11:26:44,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 11:26:44,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 11:26:44,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 11:26:44,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 11:26:44,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,735 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]. [2025-03-04 11:26:44,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,737 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 11:26:44,742 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 11:26:44,742 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 11:26:44,742 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 11:26:44,743 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (1/1) ... [2025-03-04 11:26:44,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 11:26:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:44,764 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) [2025-03-04 11:26:44,769 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 [2025-03-04 11:26:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 11:26:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 11:26:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 11:26:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2025-03-04 11:26:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2025-03-04 11:26:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 11:26:44,822 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 11:26:44,823 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 11:26:44,915 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L23: havoc #t~ret5;havoc #t~ret6; [2025-03-04 11:26:44,916 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L21: havoc #t~ret4; [2025-03-04 11:26:44,924 INFO L? ?]: Removed 21 outVars from TransFormulas that were not future-live. [2025-03-04 11:26:44,924 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 11:26:44,931 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 11:26:44,931 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 11:26:44,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 11:26:44 BoogieIcfgContainer [2025-03-04 11:26:44,932 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 11:26:44,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 11:26:44,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 11:26:44,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 11:26:44,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 11:26:44" (1/3) ... [2025-03-04 11:26:44,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f03c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 11:26:44, skipping insertion in model container [2025-03-04 11:26:44,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:26:44" (2/3) ... [2025-03-04 11:26:44,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f03c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 11:26:44, skipping insertion in model container [2025-03-04 11:26:44,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 11:26:44" (3/3) ... [2025-03-04 11:26:44,937 INFO L128 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2025-03-04 11:26:44,946 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 11:26:44,948 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann04.c that has 2 procedures, 39 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2025-03-04 11:26:44,986 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 11:26:44,995 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;@1dcb82ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 11:26:44,995 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-04 11:26:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 11:26:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-04 11:26:45,001 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:45,001 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:45,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:45,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:45,004 INFO L85 PathProgramCache]: Analyzing trace with hash -489113992, now seen corresponding path program 1 times [2025-03-04 11:26:45,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:45,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482718936] [2025-03-04 11:26:45,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:45,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 11:26:45,058 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 11:26:45,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482718936] [2025-03-04 11:26:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482718936] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:45,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:26:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:26:45,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295172748] [2025-03-04 11:26:45,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:45,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:26:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:45,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:26:45,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:26:45,163 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:45,275 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2025-03-04 11:26:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:26:45,276 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 [2025-03-04 11:26:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:45,281 INFO L225 Difference]: With dead ends: 71 [2025-03-04 11:26:45,281 INFO L226 Difference]: Without dead ends: 59 [2025-03-04 11:26:45,282 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 [2025-03-04 11:26:45,284 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:45,284 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:26:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-04 11:26:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2025-03-04 11:26:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-04 11:26:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2025-03-04 11:26:45,313 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2025-03-04 11:26:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:45,313 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2025-03-04 11:26:45,313 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) [2025-03-04 11:26:45,313 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2025-03-04 11:26:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-04 11:26:45,314 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:45,314 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:45,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 11:26:45,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:45,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2017335443, now seen corresponding path program 1 times [2025-03-04 11:26:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:45,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958864501] [2025-03-04 11:26:45,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:45,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 11:26:45,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 11:26:45,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:45,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958864501] [2025-03-04 11:26:45,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958864501] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:45,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:26:45,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:26:45,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352025556] [2025-03-04 11:26:45,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:45,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:26:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:45,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:26:45,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:26:45,364 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:45,427 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2025-03-04 11:26:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:26:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-04 11:26:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:45,432 INFO L225 Difference]: With dead ends: 82 [2025-03-04 11:26:45,432 INFO L226 Difference]: Without dead ends: 80 [2025-03-04 11:26:45,432 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 [2025-03-04 11:26:45,432 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:45,433 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 100 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:26:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-04 11:26:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2025-03-04 11:26:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.489795918367347) internal successors, (73), 57 states have internal predecessors, (73), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-04 11:26:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2025-03-04 11:26:45,444 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 9 [2025-03-04 11:26:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:45,444 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2025-03-04 11:26:45,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2025-03-04 11:26:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-04 11:26:45,445 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:45,445 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:45,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 11:26:45,445 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:45,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2017336276, now seen corresponding path program 1 times [2025-03-04 11:26:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:45,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635501478] [2025-03-04 11:26:45,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:45,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 11:26:45,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 11:26:45,459 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:45,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635501478] [2025-03-04 11:26:45,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635501478] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:45,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:26:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:26:45,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853518776] [2025-03-04 11:26:45,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:45,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:26:45,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:45,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:26:45,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:26:45,499 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:45,564 INFO L93 Difference]: Finished difference Result 118 states and 152 transitions. [2025-03-04 11:26:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:26:45,566 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 [2025-03-04 11:26:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:45,567 INFO L225 Difference]: With dead ends: 118 [2025-03-04 11:26:45,567 INFO L226 Difference]: Without dead ends: 108 [2025-03-04 11:26:45,568 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 [2025-03-04 11:26:45,568 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:45,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 101 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:26:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-04 11:26:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2025-03-04 11:26:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 11:26:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2025-03-04 11:26:45,584 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2025-03-04 11:26:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:45,584 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2025-03-04 11:26:45,584 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) [2025-03-04 11:26:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2025-03-04 11:26:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-04 11:26:45,585 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:45,585 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:45,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 11:26:45,585 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:45,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1887084879, now seen corresponding path program 1 times [2025-03-04 11:26:45,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:45,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932707103] [2025-03-04 11:26:45,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:45,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 11:26:45,593 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 11:26:45,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932707103] [2025-03-04 11:26:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932707103] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:45,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:26:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:26:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949376700] [2025-03-04 11:26:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:45,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:26:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:45,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:26:45,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:26:45,653 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:45,708 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2025-03-04 11:26:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:26:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-04 11:26:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:45,710 INFO L225 Difference]: With dead ends: 110 [2025-03-04 11:26:45,711 INFO L226 Difference]: Without dead ends: 108 [2025-03-04 11:26:45,711 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 [2025-03-04 11:26:45,711 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:45,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:26:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2025-03-04 11:26:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2025-03-04 11:26:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 11:26:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2025-03-04 11:26:45,722 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2025-03-04 11:26:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:45,722 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2025-03-04 11:26:45,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2025-03-04 11:26:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-04 11:26:45,723 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:45,723 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:45,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 11:26:45,723 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:45,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash -224957691, now seen corresponding path program 1 times [2025-03-04 11:26:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:45,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446556986] [2025-03-04 11:26:45,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:45,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 11:26:45,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 11:26:45,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:45,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446556986] [2025-03-04 11:26:45,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446556986] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:45,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:26:45,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:26:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386217862] [2025-03-04 11:26:45,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:45,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 11:26:45,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:45,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 11:26:45,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 11:26:45,770 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:45,812 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2025-03-04 11:26:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 11:26:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-04 11:26:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:45,813 INFO L225 Difference]: With dead ends: 170 [2025-03-04 11:26:45,813 INFO L226 Difference]: Without dead ends: 99 [2025-03-04 11:26:45,814 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 [2025-03-04 11:26:45,815 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:45,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:26:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-04 11:26:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2025-03-04 11:26:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-04 11:26:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2025-03-04 11:26:45,823 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2025-03-04 11:26:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:45,823 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2025-03-04 11:26:45,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2025-03-04 11:26:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-04 11:26:45,823 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:45,823 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:45,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-04 11:26:45,824 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:45,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash -224957667, now seen corresponding path program 1 times [2025-03-04 11:26:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122806823] [2025-03-04 11:26:45,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:45,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 11:26:45,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 11:26:45,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:45,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122806823] [2025-03-04 11:26:45,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122806823] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786923970] [2025-03-04 11:26:45,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:45,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:45,903 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) [2025-03-04 11:26:45,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 11:26:45,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 11:26:45,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 11:26:45,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:45,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:45,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 11:26:45,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:45,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:46,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786923970] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:46,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:46,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-04 11:26:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880988434] [2025-03-04 11:26:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:46,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 11:26:46,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:46,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 11:26:46,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-04 11:26:46,050 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:46,250 INFO L93 Difference]: Finished difference Result 276 states and 359 transitions. [2025-03-04 11:26:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 11:26:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-04 11:26:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:46,253 INFO L225 Difference]: With dead ends: 276 [2025-03-04 11:26:46,254 INFO L226 Difference]: Without dead ends: 274 [2025-03-04 11:26:46,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-04 11:26:46,255 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 171 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:46,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 219 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:26:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2025-03-04 11:26:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 236. [2025-03-04 11:26:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2025-03-04 11:26:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2025-03-04 11:26:46,292 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2025-03-04 11:26:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:46,292 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2025-03-04 11:26:46,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2025-03-04 11:26:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-04 11:26:46,292 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:46,292 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:46,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:46,493 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 [2025-03-04 11:26:46,493 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:46,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2020160200, now seen corresponding path program 1 times [2025-03-04 11:26:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:46,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557369592] [2025-03-04 11:26:46,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:46,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 11:26:46,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 11:26:46,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:46,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:46,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:46,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557369592] [2025-03-04 11:26:46,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557369592] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:46,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258058880] [2025-03-04 11:26:46,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:46,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:46,559 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) [2025-03-04 11:26:46,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 11:26:46,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 11:26:46,583 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 11:26:46,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:46,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:46,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 11:26:46,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:46,610 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 11:26:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258058880] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 11:26:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2025-03-04 11:26:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551181854] [2025-03-04 11:26:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:46,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:26:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:46,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:26:46,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-04 11:26:46,612 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:46,685 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2025-03-04 11:26:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 11:26:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-04 11:26:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:46,688 INFO L225 Difference]: With dead ends: 328 [2025-03-04 11:26:46,688 INFO L226 Difference]: Without dead ends: 327 [2025-03-04 11:26:46,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-04 11:26:46,689 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:46,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 90 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:26:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-04 11:26:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2025-03-04 11:26:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-04 11:26:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2025-03-04 11:26:46,723 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2025-03-04 11:26:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:46,723 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2025-03-04 11:26:46,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2025-03-04 11:26:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-04 11:26:46,724 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:46,724 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:46,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:46,924 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 [2025-03-04 11:26:46,925 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:46,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:46,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1511600730, now seen corresponding path program 1 times [2025-03-04 11:26:46,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:46,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163281213] [2025-03-04 11:26:46,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:46,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:46,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 11:26:46,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 11:26:46,931 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:46,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:46,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163281213] [2025-03-04 11:26:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163281213] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913256433] [2025-03-04 11:26:46,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:46,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:46,978 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) [2025-03-04 11:26:46,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 11:26:46,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-04 11:26:47,005 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 11:26:47,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:47,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:47,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 11:26:47,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:47,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913256433] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:47,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:47,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-04 11:26:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080383986] [2025-03-04 11:26:47,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:47,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 11:26:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:47,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 11:26:47,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-04 11:26:47,083 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:47,273 INFO L93 Difference]: Finished difference Result 577 states and 766 transitions. [2025-03-04 11:26:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 11:26:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-04 11:26:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:47,277 INFO L225 Difference]: With dead ends: 577 [2025-03-04 11:26:47,280 INFO L226 Difference]: Without dead ends: 576 [2025-03-04 11:26:47,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-04 11:26:47,281 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 169 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:47,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 183 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:26:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2025-03-04 11:26:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 521. [2025-03-04 11:26:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2025-03-04 11:26:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2025-03-04 11:26:47,324 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2025-03-04 11:26:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:47,324 INFO L471 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2025-03-04 11:26:47,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2025-03-04 11:26:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-04 11:26:47,326 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:47,326 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:47,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:47,526 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 [2025-03-04 11:26:47,527 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:47,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:47,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1980210359, now seen corresponding path program 1 times [2025-03-04 11:26:47,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:47,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64522573] [2025-03-04 11:26:47,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:47,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 11:26:47,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 11:26:47,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:47,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 11:26:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64522573] [2025-03-04 11:26:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64522573] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437941318] [2025-03-04 11:26:47,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:47,609 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) [2025-03-04 11:26:47,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 11:26:47,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 11:26:47,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 11:26:47,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:47,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:47,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 11:26:47,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 11:26:47,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 11:26:47,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437941318] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:47,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-04 11:26:47,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394624442] [2025-03-04 11:26:47,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:47,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 11:26:47,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:47,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 11:26:47,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2025-03-04 11:26:47,783 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:26:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:48,206 INFO L93 Difference]: Finished difference Result 1306 states and 1818 transitions. [2025-03-04 11:26:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-04 11:26:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-03-04 11:26:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:48,211 INFO L225 Difference]: With dead ends: 1306 [2025-03-04 11:26:48,211 INFO L226 Difference]: Without dead ends: 915 [2025-03-04 11:26:48,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2025-03-04 11:26:48,216 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:48,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 105 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:26:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2025-03-04 11:26:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 715. [2025-03-04 11:26:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 560 states have (on average 1.1982142857142857) internal successors, (671), 581 states have internal predecessors, (671), 103 states have call successors, (103), 47 states have call predecessors, (103), 46 states have return successors, (106), 86 states have call predecessors, (106), 78 states have call successors, (106) [2025-03-04 11:26:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 880 transitions. [2025-03-04 11:26:48,271 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 880 transitions. Word has length 24 [2025-03-04 11:26:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:48,272 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 880 transitions. [2025-03-04 11:26:48,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:26:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 880 transitions. [2025-03-04 11:26:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-04 11:26:48,273 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:48,273 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:48,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:48,473 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 [2025-03-04 11:26:48,473 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:48,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:48,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1184768225, now seen corresponding path program 1 times [2025-03-04 11:26:48,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:48,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832913749] [2025-03-04 11:26:48,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:48,476 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 11:26:48,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 11:26:48,480 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:48,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 11:26:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832913749] [2025-03-04 11:26:48,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832913749] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845635704] [2025-03-04 11:26:48,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:48,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:48,549 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) [2025-03-04 11:26:48,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 11:26:48,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 11:26:48,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 11:26:48,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:48,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:48,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 11:26:48,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 11:26:48,609 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 11:26:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845635704] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:26:48,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 11:26:48,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2025-03-04 11:26:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600051167] [2025-03-04 11:26:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:48,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:26:48,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:48,611 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:26:48,611 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-04 11:26:48,611 INFO L87 Difference]: Start difference. First operand 715 states and 880 transitions. Second operand has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 11:26:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:48,706 INFO L93 Difference]: Finished difference Result 762 states and 976 transitions. [2025-03-04 11:26:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 11:26:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2025-03-04 11:26:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:48,722 INFO L225 Difference]: With dead ends: 762 [2025-03-04 11:26:48,722 INFO L226 Difference]: Without dead ends: 761 [2025-03-04 11:26:48,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2025-03-04 11:26:48,723 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:48,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 110 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:26:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2025-03-04 11:26:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 686. [2025-03-04 11:26:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 534 states have (on average 1.1779026217228465) internal successors, (629), 556 states have internal predecessors, (629), 101 states have call successors, (101), 43 states have call predecessors, (101), 46 states have return successors, (106), 86 states have call predecessors, (106), 78 states have call successors, (106) [2025-03-04 11:26:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 836 transitions. [2025-03-04 11:26:48,769 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 836 transitions. Word has length 28 [2025-03-04 11:26:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:48,770 INFO L471 AbstractCegarLoop]: Abstraction has 686 states and 836 transitions. [2025-03-04 11:26:48,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 11:26:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 836 transitions. [2025-03-04 11:26:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-04 11:26:48,772 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:48,772 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:48,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 11:26:48,973 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 [2025-03-04 11:26:48,973 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:48,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1930986427, now seen corresponding path program 1 times [2025-03-04 11:26:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:48,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39275204] [2025-03-04 11:26:48,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:48,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-04 11:26:48,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-04 11:26:48,980 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:48,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:49,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39275204] [2025-03-04 11:26:49,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39275204] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:49,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096981904] [2025-03-04 11:26:49,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:49,044 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) [2025-03-04 11:26:49,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 11:26:49,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-04 11:26:49,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-04 11:26:49,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:49,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:49,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 11:26:49,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:49,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:49,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096981904] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:49,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 11:26:49,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-04 11:26:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620845979] [2025-03-04 11:26:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:49,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 11:26:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:49,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 11:26:49,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-04 11:26:49,302 INFO L87 Difference]: Start difference. First operand 686 states and 836 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 11:26:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:49,530 INFO L93 Difference]: Finished difference Result 793 states and 1000 transitions. [2025-03-04 11:26:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-04 11:26:49,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2025-03-04 11:26:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:49,534 INFO L225 Difference]: With dead ends: 793 [2025-03-04 11:26:49,534 INFO L226 Difference]: Without dead ends: 792 [2025-03-04 11:26:49,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2025-03-04 11:26:49,535 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:49,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 159 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:26:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2025-03-04 11:26:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 685. [2025-03-04 11:26:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 534 states have (on average 1.1704119850187267) internal successors, (625), 555 states have internal predecessors, (625), 101 states have call successors, (101), 43 states have call predecessors, (101), 46 states have return successors, (106), 86 states have call predecessors, (106), 78 states have call successors, (106) [2025-03-04 11:26:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 832 transitions. [2025-03-04 11:26:49,604 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 832 transitions. Word has length 33 [2025-03-04 11:26:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:49,605 INFO L471 AbstractCegarLoop]: Abstraction has 685 states and 832 transitions. [2025-03-04 11:26:49,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 11:26:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 832 transitions. [2025-03-04 11:26:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-04 11:26:49,606 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:49,606 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:49,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:49,806 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 [2025-03-04 11:26:49,807 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:49,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash 268962918, now seen corresponding path program 1 times [2025-03-04 11:26:49,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:49,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055899411] [2025-03-04 11:26:49,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:49,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-04 11:26:49,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-04 11:26:49,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:49,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:49,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055899411] [2025-03-04 11:26:49,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055899411] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:49,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325488260] [2025-03-04 11:26:49,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:49,924 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) [2025-03-04 11:26:49,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 11:26:49,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-04 11:26:49,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-04 11:26:49,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:49,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:49,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 11:26:49,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:49,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325488260] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:50,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:50,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-04 11:26:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279901324] [2025-03-04 11:26:50,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:50,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 11:26:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:50,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 11:26:50,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2025-03-04 11:26:50,159 INFO L87 Difference]: Start difference. First operand 685 states and 832 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-04 11:26:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:50,562 INFO L93 Difference]: Finished difference Result 1135 states and 1689 transitions. [2025-03-04 11:26:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-04 11:26:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2025-03-04 11:26:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:50,568 INFO L225 Difference]: With dead ends: 1135 [2025-03-04 11:26:50,568 INFO L226 Difference]: Without dead ends: 1134 [2025-03-04 11:26:50,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2025-03-04 11:26:50,570 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:50,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 236 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:26:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2025-03-04 11:26:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 945. [2025-03-04 11:26:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 705 states have (on average 1.1602836879432623) internal successors, (818), 740 states have internal predecessors, (818), 150 states have call successors, (150), 50 states have call predecessors, (150), 86 states have return successors, (301), 154 states have call predecessors, (301), 126 states have call successors, (301) [2025-03-04 11:26:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1269 transitions. [2025-03-04 11:26:50,653 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1269 transitions. Word has length 34 [2025-03-04 11:26:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:50,653 INFO L471 AbstractCegarLoop]: Abstraction has 945 states and 1269 transitions. [2025-03-04 11:26:50,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-04 11:26:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1269 transitions. [2025-03-04 11:26:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-04 11:26:50,654 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:50,654 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:50,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:50,858 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 [2025-03-04 11:26:50,858 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:50,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash -54654743, now seen corresponding path program 1 times [2025-03-04 11:26:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:50,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735767504] [2025-03-04 11:26:50,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:50,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-04 11:26:50,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 11:26:50,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:50,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 11:26:50,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:50,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735767504] [2025-03-04 11:26:50,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735767504] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:50,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861783287] [2025-03-04 11:26:50,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:50,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:50,941 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) [2025-03-04 11:26:50,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 11:26:50,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-04 11:26:50,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 11:26:50,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:50,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:50,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 11:26:50,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 11:26:51,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 11:26:51,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861783287] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:51,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:51,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-04 11:26:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484685806] [2025-03-04 11:26:51,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:51,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 11:26:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:51,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 11:26:51,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2025-03-04 11:26:51,150 INFO L87 Difference]: Start difference. First operand 945 states and 1269 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:26:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:51,529 INFO L93 Difference]: Finished difference Result 1154 states and 1562 transitions. [2025-03-04 11:26:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-04 11:26:51,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2025-03-04 11:26:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:51,534 INFO L225 Difference]: With dead ends: 1154 [2025-03-04 11:26:51,534 INFO L226 Difference]: Without dead ends: 1153 [2025-03-04 11:26:51,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2025-03-04 11:26:51,535 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 188 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:51,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 215 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:26:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2025-03-04 11:26:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 986. [2025-03-04 11:26:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 739 states have (on average 1.1610284167794316) internal successors, (858), 771 states have internal predecessors, (858), 157 states have call successors, (157), 56 states have call predecessors, (157), 86 states have return successors, (301), 158 states have call predecessors, (301), 126 states have call successors, (301) [2025-03-04 11:26:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1316 transitions. [2025-03-04 11:26:51,602 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1316 transitions. Word has length 35 [2025-03-04 11:26:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:51,602 INFO L471 AbstractCegarLoop]: Abstraction has 986 states and 1316 transitions. [2025-03-04 11:26:51,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:26:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1316 transitions. [2025-03-04 11:26:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-04 11:26:51,603 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:51,603 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:51,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:51,807 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 [2025-03-04 11:26:51,808 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:51,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 776149949, now seen corresponding path program 1 times [2025-03-04 11:26:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:51,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594786066] [2025-03-04 11:26:51,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:51,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 11:26:51,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 11:26:51,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:51,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:51,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594786066] [2025-03-04 11:26:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594786066] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:51,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250326708] [2025-03-04 11:26:51,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:51,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:51,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:51,883 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) [2025-03-04 11:26:51,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 11:26:51,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 11:26:51,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 11:26:51,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:51,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:51,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 11:26:51,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:51,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250326708] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:52,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 11:26:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2025-03-04 11:26:52,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856634406] [2025-03-04 11:26:52,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:26:52,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 11:26:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:52,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 11:26:52,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-03-04 11:26:52,093 INFO L87 Difference]: Start difference. First operand 986 states and 1316 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 11:26:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:52,324 INFO L93 Difference]: Finished difference Result 1136 states and 1594 transitions. [2025-03-04 11:26:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 11:26:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2025-03-04 11:26:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:52,329 INFO L225 Difference]: With dead ends: 1136 [2025-03-04 11:26:52,329 INFO L226 Difference]: Without dead ends: 1135 [2025-03-04 11:26:52,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2025-03-04 11:26:52,330 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:52,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 183 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:26:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2025-03-04 11:26:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 994. [2025-03-04 11:26:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 747 states have (on average 1.1552878179384203) internal successors, (863), 775 states have internal predecessors, (863), 161 states have call successors, (161), 56 states have call predecessors, (161), 82 states have return successors, (241), 162 states have call predecessors, (241), 130 states have call successors, (241) [2025-03-04 11:26:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1265 transitions. [2025-03-04 11:26:52,428 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1265 transitions. Word has length 36 [2025-03-04 11:26:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:52,428 INFO L471 AbstractCegarLoop]: Abstraction has 994 states and 1265 transitions. [2025-03-04 11:26:52,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 11:26:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1265 transitions. [2025-03-04 11:26:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-04 11:26:52,430 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:52,430 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:52,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:52,634 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 [2025-03-04 11:26:52,634 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:52,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1235994774, now seen corresponding path program 2 times [2025-03-04 11:26:52,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:52,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812690907] [2025-03-04 11:26:52,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:26:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:52,637 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 11:26:52,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 11:26:52,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:26:52,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:52,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812690907] [2025-03-04 11:26:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812690907] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126507893] [2025-03-04 11:26:52,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:26:52,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:52,751 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) [2025-03-04 11:26:52,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 11:26:52,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-04 11:26:52,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-04 11:26:52,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:26:52,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:52,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 11:26:52,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:52,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:26:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126507893] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:52,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-04 11:26:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703805493] [2025-03-04 11:26:52,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:52,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 11:26:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:52,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 11:26:52,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-04 11:26:52,979 INFO L87 Difference]: Start difference. First operand 994 states and 1265 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:53,422 INFO L93 Difference]: Finished difference Result 1989 states and 2570 transitions. [2025-03-04 11:26:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 11:26:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-04 11:26:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:53,429 INFO L225 Difference]: With dead ends: 1989 [2025-03-04 11:26:53,429 INFO L226 Difference]: Without dead ends: 1988 [2025-03-04 11:26:53,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2025-03-04 11:26:53,430 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 515 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:53,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 305 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:26:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2025-03-04 11:26:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1709. [2025-03-04 11:26:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1282 states have (on average 1.1365054602184088) internal successors, (1457), 1336 states have internal predecessors, (1457), 269 states have call successors, (269), 90 states have call predecessors, (269), 154 states have return successors, (409), 282 states have call predecessors, (409), 226 states have call successors, (409) [2025-03-04 11:26:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2135 transitions. [2025-03-04 11:26:53,553 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2135 transitions. Word has length 43 [2025-03-04 11:26:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:53,554 INFO L471 AbstractCegarLoop]: Abstraction has 1709 states and 2135 transitions. [2025-03-04 11:26:53,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:26:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2135 transitions. [2025-03-04 11:26:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-04 11:26:53,558 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:53,558 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:53,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 11:26:53,763 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 [2025-03-04 11:26:53,763 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:53,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1489943149, now seen corresponding path program 2 times [2025-03-04 11:26:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:53,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649269658] [2025-03-04 11:26:53,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:26:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:53,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-04 11:26:53,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-04 11:26:53,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:26:53,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649269658] [2025-03-04 11:26:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649269658] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045424843] [2025-03-04 11:26:53,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:26:53,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:53,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:53,861 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) [2025-03-04 11:26:53,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 11:26:53,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-04 11:26:53,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-04 11:26:53,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:26:53,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:53,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-04 11:26:53,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:53,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:26:54,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045424843] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:54,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:54,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2025-03-04 11:26:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876037672] [2025-03-04 11:26:54,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:54,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-04 11:26:54,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:54,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-04 11:26:54,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-04 11:26:54,114 INFO L87 Difference]: Start difference. First operand 1709 states and 2135 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-04 11:26:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:54,924 INFO L93 Difference]: Finished difference Result 3697 states and 5359 transitions. [2025-03-04 11:26:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-04 11:26:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2025-03-04 11:26:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:54,935 INFO L225 Difference]: With dead ends: 3697 [2025-03-04 11:26:54,935 INFO L226 Difference]: Without dead ends: 2573 [2025-03-04 11:26:54,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2025-03-04 11:26:54,942 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 181 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:54,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 321 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:26:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2025-03-04 11:26:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1888. [2025-03-04 11:26:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1419 states have (on average 1.1310782241014798) internal successors, (1605), 1479 states have internal predecessors, (1605), 293 states have call successors, (293), 104 states have call predecessors, (293), 172 states have return successors, (443), 304 states have call predecessors, (443), 245 states have call successors, (443) [2025-03-04 11:26:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2341 transitions. [2025-03-04 11:26:55,109 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2341 transitions. Word has length 44 [2025-03-04 11:26:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:55,109 INFO L471 AbstractCegarLoop]: Abstraction has 1888 states and 2341 transitions. [2025-03-04 11:26:55,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-04 11:26:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2341 transitions. [2025-03-04 11:26:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-04 11:26:55,112 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:55,112 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:55,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:55,313 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 [2025-03-04 11:26:55,313 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:55,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash -460172098, now seen corresponding path program 1 times [2025-03-04 11:26:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055779341] [2025-03-04 11:26:55,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:55,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:55,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-04 11:26:55,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-04 11:26:55,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:55,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-04 11:26:55,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:55,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055779341] [2025-03-04 11:26:55,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055779341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:55,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357623463] [2025-03-04 11:26:55,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:55,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:55,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:55,389 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) [2025-03-04 11:26:55,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 11:26:55,414 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-04 11:26:55,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-04 11:26:55,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:55,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:55,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 11:26:55,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-04 11:26:55,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-04 11:26:55,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357623463] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:55,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:55,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2025-03-04 11:26:55,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884591599] [2025-03-04 11:26:55,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:55,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 11:26:55,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:55,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 11:26:55,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-03-04 11:26:55,534 INFO L87 Difference]: Start difference. First operand 1888 states and 2341 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-04 11:26:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:55,784 INFO L93 Difference]: Finished difference Result 2110 states and 2763 transitions. [2025-03-04 11:26:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 11:26:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2025-03-04 11:26:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:55,791 INFO L225 Difference]: With dead ends: 2110 [2025-03-04 11:26:55,791 INFO L226 Difference]: Without dead ends: 2010 [2025-03-04 11:26:55,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-03-04 11:26:55,792 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:55,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 129 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:26:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2025-03-04 11:26:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1894. [2025-03-04 11:26:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1425 states have (on average 1.1298245614035087) internal successors, (1610), 1483 states have internal predecessors, (1610), 293 states have call successors, (293), 106 states have call predecessors, (293), 172 states have return successors, (443), 304 states have call predecessors, (443), 245 states have call successors, (443) [2025-03-04 11:26:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2346 transitions. [2025-03-04 11:26:56,019 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2346 transitions. Word has length 51 [2025-03-04 11:26:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:56,019 INFO L471 AbstractCegarLoop]: Abstraction has 1894 states and 2346 transitions. [2025-03-04 11:26:56,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-04 11:26:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2346 transitions. [2025-03-04 11:26:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-04 11:26:56,021 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:56,021 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:56,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 11:26:56,222 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 [2025-03-04 11:26:56,222 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:56,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash -682664631, now seen corresponding path program 2 times [2025-03-04 11:26:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542673630] [2025-03-04 11:26:56,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:26:56,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:56,226 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-04 11:26:56,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-04 11:26:56,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:26:56,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 11:26:56,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:56,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542673630] [2025-03-04 11:26:56,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542673630] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:56,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436958313] [2025-03-04 11:26:56,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:26:56,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:56,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:56,361 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) [2025-03-04 11:26:56,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 11:26:56,387 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 51 statements into 2 equivalence classes. [2025-03-04 11:26:56,398 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-03-04 11:26:56,398 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:26:56,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:56,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-04 11:26:56,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 11:26:56,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 11:26:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436958313] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:56,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-04 11:26:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914502160] [2025-03-04 11:26:56,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:56,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 11:26:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:56,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 11:26:56,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-04 11:26:56,637 INFO L87 Difference]: Start difference. First operand 1894 states and 2346 transitions. Second operand has 26 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:26:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:57,202 INFO L93 Difference]: Finished difference Result 2409 states and 3101 transitions. [2025-03-04 11:26:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-04 11:26:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2025-03-04 11:26:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:57,209 INFO L225 Difference]: With dead ends: 2409 [2025-03-04 11:26:57,209 INFO L226 Difference]: Without dead ends: 2408 [2025-03-04 11:26:57,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=1937, Unknown=0, NotChecked=0, Total=2450 [2025-03-04 11:26:57,210 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 369 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:57,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 306 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:26:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2025-03-04 11:26:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1937. [2025-03-04 11:26:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1459 states have (on average 1.1309115832762167) internal successors, (1650), 1515 states have internal predecessors, (1650), 302 states have call successors, (302), 111 states have call predecessors, (302), 172 states have return successors, (443), 310 states have call predecessors, (443), 245 states have call successors, (443) [2025-03-04 11:26:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2395 transitions. [2025-03-04 11:26:57,356 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2395 transitions. Word has length 51 [2025-03-04 11:26:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:26:57,356 INFO L471 AbstractCegarLoop]: Abstraction has 1937 states and 2395 transitions. [2025-03-04 11:26:57,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:26:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2395 transitions. [2025-03-04 11:26:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-04 11:26:57,358 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:26:57,358 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:26:57,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 11:26:57,562 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 [2025-03-04 11:26:57,562 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:26:57,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:26:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1951011931, now seen corresponding path program 1 times [2025-03-04 11:26:57,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:26:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751074536] [2025-03-04 11:26:57,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:26:57,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-04 11:26:57,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-04 11:26:57,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:57,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-04 11:26:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:26:57,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751074536] [2025-03-04 11:26:57,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751074536] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:26:57,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559777687] [2025-03-04 11:26:57,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:26:57,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:26:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:26:57,688 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) [2025-03-04 11:26:57,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 11:26:57,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-04 11:26:57,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-04 11:26:57,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:26:57,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:26:57,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 11:26:57,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:26:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-04 11:26:57,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:26:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-04 11:26:58,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559777687] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:26:58,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:26:58,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-04 11:26:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319677318] [2025-03-04 11:26:58,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:26:58,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 11:26:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:26:58,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 11:26:58,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2025-03-04 11:26:58,102 INFO L87 Difference]: Start difference. First operand 1937 states and 2395 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-04 11:26:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:26:59,683 INFO L93 Difference]: Finished difference Result 4673 states and 8176 transitions. [2025-03-04 11:26:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-04 11:26:59,683 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2025-03-04 11:26:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:26:59,702 INFO L225 Difference]: With dead ends: 4673 [2025-03-04 11:26:59,702 INFO L226 Difference]: Without dead ends: 4672 [2025-03-04 11:26:59,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1475, Invalid=7081, Unknown=0, NotChecked=0, Total=8556 [2025-03-04 11:26:59,706 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:26:59,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 246 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:26:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2025-03-04 11:27:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 3296. [2025-03-04 11:27:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 2306 states have (on average 1.1019080659150042) internal successors, (2541), 2372 states have internal predecessors, (2541), 581 states have call successors, (581), 125 states have call predecessors, (581), 405 states have return successors, (2934), 798 states have call predecessors, (2934), 522 states have call successors, (2934) [2025-03-04 11:27:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 6056 transitions. [2025-03-04 11:27:00,035 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 6056 transitions. Word has length 53 [2025-03-04 11:27:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:00,035 INFO L471 AbstractCegarLoop]: Abstraction has 3296 states and 6056 transitions. [2025-03-04 11:27:00,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-04 11:27:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 6056 transitions. [2025-03-04 11:27:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-04 11:27:00,037 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:00,037 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:00,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:00,242 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 [2025-03-04 11:27:00,242 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:00,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1491656896, now seen corresponding path program 1 times [2025-03-04 11:27:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790474370] [2025-03-04 11:27:00,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:00,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-04 11:27:00,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-04 11:27:00,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:00,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-04 11:27:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790474370] [2025-03-04 11:27:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790474370] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523919352] [2025-03-04 11:27:00,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:00,355 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) [2025-03-04 11:27:00,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 11:27:00,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-04 11:27:00,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-04 11:27:00,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:00,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:00,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-04 11:27:00,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-04 11:27:00,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-04 11:27:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523919352] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:00,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:00,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-04 11:27:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929114781] [2025-03-04 11:27:00,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:00,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 11:27:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:00,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 11:27:00,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2025-03-04 11:27:00,584 INFO L87 Difference]: Start difference. First operand 3296 states and 6056 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:27:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:01,652 INFO L93 Difference]: Finished difference Result 8935 states and 16870 transitions. [2025-03-04 11:27:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 11:27:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2025-03-04 11:27:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:01,691 INFO L225 Difference]: With dead ends: 8935 [2025-03-04 11:27:01,691 INFO L226 Difference]: Without dead ends: 8933 [2025-03-04 11:27:01,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2025-03-04 11:27:01,696 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 600 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:01,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 335 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:27:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2025-03-04 11:27:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 8720. [2025-03-04 11:27:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 6122 states have (on average 1.0991506043776544) internal successors, (6729), 6296 states have internal predecessors, (6729), 1535 states have call successors, (1535), 341 states have call predecessors, (1535), 1059 states have return successors, (7710), 2082 states have call predecessors, (7710), 1368 states have call successors, (7710) [2025-03-04 11:27:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 15974 transitions. [2025-03-04 11:27:02,740 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 15974 transitions. Word has length 57 [2025-03-04 11:27:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:02,741 INFO L471 AbstractCegarLoop]: Abstraction has 8720 states and 15974 transitions. [2025-03-04 11:27:02,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:27:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 15974 transitions. [2025-03-04 11:27:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-04 11:27:02,743 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:02,743 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:02,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 11:27:02,946 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 [2025-03-04 11:27:02,947 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:02,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1977419150, now seen corresponding path program 1 times [2025-03-04 11:27:02,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:02,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955340118] [2025-03-04 11:27:02,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:02,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:02,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-04 11:27:02,953 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-04 11:27:02,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:02,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-04 11:27:03,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:03,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955340118] [2025-03-04 11:27:03,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955340118] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:03,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698758579] [2025-03-04 11:27:03,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:03,053 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) [2025-03-04 11:27:03,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 11:27:03,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-04 11:27:03,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-04 11:27:03,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:03,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:03,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 11:27:03,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-04 11:27:03,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-04 11:27:03,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698758579] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:03,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:03,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2025-03-04 11:27:03,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945229045] [2025-03-04 11:27:03,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:03,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 11:27:03,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:03,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 11:27:03,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2025-03-04 11:27:03,434 INFO L87 Difference]: Start difference. First operand 8720 states and 15974 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-04 11:27:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:07,624 INFO L93 Difference]: Finished difference Result 37045 states and 112394 transitions. [2025-03-04 11:27:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-04 11:27:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2025-03-04 11:27:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:07,855 INFO L225 Difference]: With dead ends: 37045 [2025-03-04 11:27:07,855 INFO L226 Difference]: Without dead ends: 28996 [2025-03-04 11:27:07,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1752, Invalid=7560, Unknown=0, NotChecked=0, Total=9312 [2025-03-04 11:27:07,970 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 219 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:07,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 406 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-04 11:27:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2025-03-04 11:27:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 20092. [2025-03-04 11:27:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20092 states, 13074 states have (on average 1.0577482025393912) internal successors, (13829), 13284 states have internal predecessors, (13829), 4021 states have call successors, (4021), 427 states have call predecessors, (4021), 2993 states have return successors, (45035), 6380 states have call predecessors, (45035), 3840 states have call successors, (45035) [2025-03-04 11:27:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20092 states to 20092 states and 62885 transitions. [2025-03-04 11:27:11,458 INFO L78 Accepts]: Start accepts. Automaton has 20092 states and 62885 transitions. Word has length 55 [2025-03-04 11:27:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:11,458 INFO L471 AbstractCegarLoop]: Abstraction has 20092 states and 62885 transitions. [2025-03-04 11:27:11,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-04 11:27:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20092 states and 62885 transitions. [2025-03-04 11:27:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-04 11:27:11,461 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:11,461 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:11,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:11,665 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 [2025-03-04 11:27:11,665 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:11,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:11,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1779584020, now seen corresponding path program 2 times [2025-03-04 11:27:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961883724] [2025-03-04 11:27:11,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:11,668 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-04 11:27:11,672 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-04 11:27:11,672 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:11,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-04 11:27:11,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:11,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961883724] [2025-03-04 11:27:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961883724] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:11,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387664861] [2025-03-04 11:27:11,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:11,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:11,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:11,821 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) [2025-03-04 11:27:11,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 11:27:11,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 72 statements into 2 equivalence classes. [2025-03-04 11:27:11,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 72 of 72 statements. [2025-03-04 11:27:11,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:11,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:11,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-04 11:27:11,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-04 11:27:11,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-04 11:27:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387664861] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:12,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 31 [2025-03-04 11:27:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912576048] [2025-03-04 11:27:12,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:12,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-04 11:27:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:12,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-04 11:27:12,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2025-03-04 11:27:12,606 INFO L87 Difference]: Start difference. First operand 20092 states and 62885 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-04 11:27:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:15,196 INFO L93 Difference]: Finished difference Result 34821 states and 105928 transitions. [2025-03-04 11:27:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-04 11:27:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2025-03-04 11:27:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:15,277 INFO L225 Difference]: With dead ends: 34821 [2025-03-04 11:27:15,277 INFO L226 Difference]: Without dead ends: 15389 [2025-03-04 11:27:15,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1108, Invalid=5212, Unknown=0, NotChecked=0, Total=6320 [2025-03-04 11:27:15,536 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:15,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 571 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:27:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15389 states. [2025-03-04 11:27:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15389 to 12581. [2025-03-04 11:27:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12581 states, 8648 states have (on average 1.0882284921369103) internal successors, (9411), 9009 states have internal predecessors, (9411), 2410 states have call successors, (2410), 459 states have call predecessors, (2410), 1519 states have return successors, (6313), 3112 states have call predecessors, (6313), 2233 states have call successors, (6313) [2025-03-04 11:27:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12581 states to 12581 states and 18134 transitions. [2025-03-04 11:27:17,101 INFO L78 Accepts]: Start accepts. Automaton has 12581 states and 18134 transitions. Word has length 72 [2025-03-04 11:27:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:17,102 INFO L471 AbstractCegarLoop]: Abstraction has 12581 states and 18134 transitions. [2025-03-04 11:27:17,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-04 11:27:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 12581 states and 18134 transitions. [2025-03-04 11:27:17,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-04 11:27:17,105 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:17,105 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:17,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:17,306 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 [2025-03-04 11:27:17,306 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:17,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 173863337, now seen corresponding path program 3 times [2025-03-04 11:27:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482643072] [2025-03-04 11:27:17,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:17,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 67 statements into 7 equivalence classes. [2025-03-04 11:27:17,321 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 59 of 67 statements. [2025-03-04 11:27:17,321 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 11:27:17,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-04 11:27:17,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:17,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482643072] [2025-03-04 11:27:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482643072] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:17,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:27:17,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 11:27:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171584518] [2025-03-04 11:27:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:17,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:27:17,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:17,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:27:17,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:27:17,369 INFO L87 Difference]: Start difference. First operand 12581 states and 18134 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 11:27:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:18,991 INFO L93 Difference]: Finished difference Result 12681 states and 19705 transitions. [2025-03-04 11:27:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:27:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2025-03-04 11:27:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:19,027 INFO L225 Difference]: With dead ends: 12681 [2025-03-04 11:27:19,027 INFO L226 Difference]: Without dead ends: 10670 [2025-03-04 11:27:19,038 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 [2025-03-04 11:27:19,039 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:19,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10670 states. [2025-03-04 11:27:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10670 to 10486. [2025-03-04 11:27:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10486 states, 6985 states have (on average 1.0564065855404439) internal successors, (7379), 7108 states have internal predecessors, (7379), 2240 states have call successors, (2240), 331 states have call predecessors, (2240), 1258 states have return successors, (5982), 3046 states have call predecessors, (5982), 2233 states have call successors, (5982) [2025-03-04 11:27:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10486 states to 10486 states and 15601 transitions. [2025-03-04 11:27:20,152 INFO L78 Accepts]: Start accepts. Automaton has 10486 states and 15601 transitions. Word has length 67 [2025-03-04 11:27:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:20,152 INFO L471 AbstractCegarLoop]: Abstraction has 10486 states and 15601 transitions. [2025-03-04 11:27:20,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 11:27:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 10486 states and 15601 transitions. [2025-03-04 11:27:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-04 11:27:20,156 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:20,156 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:20,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-04 11:27:20,156 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:20,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1635289475, now seen corresponding path program 3 times [2025-03-04 11:27:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764131586] [2025-03-04 11:27:20,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:20,161 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 8 equivalence classes. [2025-03-04 11:27:20,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 68 of 68 statements. [2025-03-04 11:27:20,175 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-04 11:27:20,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 46 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-04 11:27:20,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764131586] [2025-03-04 11:27:20,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764131586] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:20,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988062391] [2025-03-04 11:27:20,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:20,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:20,324 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) [2025-03-04 11:27:20,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 11:27:20,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 68 statements into 8 equivalence classes. [2025-03-04 11:27:20,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 68 of 68 statements. [2025-03-04 11:27:20,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-04 11:27:20,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:20,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-04 11:27:20,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:27:20,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 11:27:20,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988062391] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:20,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2025-03-04 11:27:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766985037] [2025-03-04 11:27:20,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:20,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-04 11:27:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:20,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-04 11:27:20,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2025-03-04 11:27:20,915 INFO L87 Difference]: Start difference. First operand 10486 states and 15601 transitions. Second operand has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 29 states have internal predecessors, (132), 16 states have call successors, (18), 13 states have call predecessors, (18), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-04 11:27:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:22,919 INFO L93 Difference]: Finished difference Result 20433 states and 35844 transitions. [2025-03-04 11:27:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-04 11:27:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 29 states have internal predecessors, (132), 16 states have call successors, (18), 13 states have call predecessors, (18), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2025-03-04 11:27:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:22,966 INFO L225 Difference]: With dead ends: 20433 [2025-03-04 11:27:22,966 INFO L226 Difference]: Without dead ends: 10519 [2025-03-04 11:27:23,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2025-03-04 11:27:23,015 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 351 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:23,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 190 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:27:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2025-03-04 11:27:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10235. [2025-03-04 11:27:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10235 states, 6682 states have (on average 1.0428015564202335) internal successors, (6968), 6813 states have internal predecessors, (6968), 2128 states have call successors, (2128), 279 states have call predecessors, (2128), 1423 states have return successors, (5603), 3142 states have call predecessors, (5603), 2122 states have call successors, (5603) [2025-03-04 11:27:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10235 states to 10235 states and 14699 transitions. [2025-03-04 11:27:24,281 INFO L78 Accepts]: Start accepts. Automaton has 10235 states and 14699 transitions. Word has length 68 [2025-03-04 11:27:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:24,281 INFO L471 AbstractCegarLoop]: Abstraction has 10235 states and 14699 transitions. [2025-03-04 11:27:24,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.142857142857143) internal successors, (132), 29 states have internal predecessors, (132), 16 states have call successors, (18), 13 states have call predecessors, (18), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-04 11:27:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10235 states and 14699 transitions. [2025-03-04 11:27:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-04 11:27:24,283 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:24,284 INFO L218 NwaCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:24,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:24,484 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 [2025-03-04 11:27:24,484 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:24,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1272830796, now seen corresponding path program 2 times [2025-03-04 11:27:24,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:24,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050129865] [2025-03-04 11:27:24,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:24,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 105 statements into 2 equivalence classes. [2025-03-04 11:27:24,496 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 105 of 105 statements. [2025-03-04 11:27:24,496 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:24,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 132 proven. 31 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2025-03-04 11:27:24,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050129865] [2025-03-04 11:27:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050129865] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97651793] [2025-03-04 11:27:24,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:24,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:24,556 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) [2025-03-04 11:27:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 11:27:24,599 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 105 statements into 2 equivalence classes. [2025-03-04 11:27:24,620 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 105 of 105 statements. [2025-03-04 11:27:24,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:24,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:24,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 11:27:24,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2025-03-04 11:27:24,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2025-03-04 11:27:24,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97651793] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:24,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 11 [2025-03-04 11:27:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819831622] [2025-03-04 11:27:24,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:24,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 11:27:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:24,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 11:27:24,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-04 11:27:24,890 INFO L87 Difference]: Start difference. First operand 10235 states and 14699 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 10 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2025-03-04 11:27:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:26,393 INFO L93 Difference]: Finished difference Result 22118 states and 33837 transitions. [2025-03-04 11:27:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 11:27:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 10 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) Word has length 105 [2025-03-04 11:27:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:26,437 INFO L225 Difference]: With dead ends: 22118 [2025-03-04 11:27:26,437 INFO L226 Difference]: Without dead ends: 12286 [2025-03-04 11:27:26,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2025-03-04 11:27:26,473 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:26,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 109 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12286 states. [2025-03-04 11:27:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12286 to 10000. [2025-03-04 11:27:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10000 states, 6542 states have (on average 1.043717517578722) internal successors, (6828), 6673 states have internal predecessors, (6828), 2078 states have call successors, (2078), 279 states have call predecessors, (2078), 1378 states have return successors, (5412), 3047 states have call predecessors, (5412), 2045 states have call successors, (5412) [2025-03-04 11:27:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10000 states to 10000 states and 14318 transitions. [2025-03-04 11:27:27,717 INFO L78 Accepts]: Start accepts. Automaton has 10000 states and 14318 transitions. Word has length 105 [2025-03-04 11:27:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:27,717 INFO L471 AbstractCegarLoop]: Abstraction has 10000 states and 14318 transitions. [2025-03-04 11:27:27,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 10 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2025-03-04 11:27:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 10000 states and 14318 transitions. [2025-03-04 11:27:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-04 11:27:27,719 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:27,719 INFO L218 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:27,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-04 11:27:27,919 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 [2025-03-04 11:27:27,920 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:27,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash -456104179, now seen corresponding path program 3 times [2025-03-04 11:27:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405984861] [2025-03-04 11:27:27,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:27,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:27,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 7 equivalence classes. [2025-03-04 11:27:27,929 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 86 of 100 statements. [2025-03-04 11:27:27,930 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 11:27:27,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 127 proven. 43 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-04 11:27:28,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:28,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405984861] [2025-03-04 11:27:28,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405984861] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:28,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175903149] [2025-03-04 11:27:28,002 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:28,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:28,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:28,004 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) [2025-03-04 11:27:28,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 11:27:28,043 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 7 equivalence classes. [2025-03-04 11:27:28,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 86 of 100 statements. [2025-03-04 11:27:28,061 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 11:27:28,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:28,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 11:27:28,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2025-03-04 11:27:28,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-04 11:27:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175903149] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:28,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 15 [2025-03-04 11:27:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617578492] [2025-03-04 11:27:28,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:28,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-04 11:27:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:28,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-04 11:27:28,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-04 11:27:28,629 INFO L87 Difference]: Start difference. First operand 10000 states and 14318 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-04 11:27:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:30,011 INFO L93 Difference]: Finished difference Result 20552 states and 34945 transitions. [2025-03-04 11:27:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 11:27:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) Word has length 100 [2025-03-04 11:27:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:30,062 INFO L225 Difference]: With dead ends: 20552 [2025-03-04 11:27:30,062 INFO L226 Difference]: Without dead ends: 11109 [2025-03-04 11:27:30,099 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 195 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2025-03-04 11:27:30,100 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:30,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 138 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11109 states. [2025-03-04 11:27:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11109 to 6185. [2025-03-04 11:27:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 4146 states have (on average 1.0381090207428847) internal successors, (4304), 4258 states have internal predecessors, (4304), 1225 states have call successors, (1225), 214 states have call predecessors, (1225), 812 states have return successors, (2059), 1712 states have call predecessors, (2059), 1203 states have call successors, (2059) [2025-03-04 11:27:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 7588 transitions. [2025-03-04 11:27:30,961 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 7588 transitions. Word has length 100 [2025-03-04 11:27:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:30,961 INFO L471 AbstractCegarLoop]: Abstraction has 6185 states and 7588 transitions. [2025-03-04 11:27:30,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-04 11:27:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 7588 transitions. [2025-03-04 11:27:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-03-04 11:27:30,964 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:30,964 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, 1] [2025-03-04 11:27:30,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:31,164 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 [2025-03-04 11:27:31,164 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:31,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1844069156, now seen corresponding path program 3 times [2025-03-04 11:27:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079968353] [2025-03-04 11:27:31,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:31,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 96 statements into 10 equivalence classes. [2025-03-04 11:27:31,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 96 of 96 statements. [2025-03-04 11:27:31,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-04 11:27:31,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 139 proven. 91 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-04 11:27:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079968353] [2025-03-04 11:27:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079968353] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:31,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169151210] [2025-03-04 11:27:31,486 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:31,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:31,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:31,488 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) [2025-03-04 11:27:31,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-04 11:27:31,535 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 96 statements into 10 equivalence classes. [2025-03-04 11:27:31,558 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 96 of 96 statements. [2025-03-04 11:27:31,559 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-04 11:27:31,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:31,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-04 11:27:31,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 131 proven. 94 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-04 11:27:31,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 151 proven. 79 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-03-04 11:27:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169151210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:32,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:32,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 22] total 43 [2025-03-04 11:27:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960253781] [2025-03-04 11:27:32,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:32,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-04 11:27:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:32,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-04 11:27:32,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2025-03-04 11:27:32,440 INFO L87 Difference]: Start difference. First operand 6185 states and 7588 transitions. Second operand has 44 states, 43 states have (on average 2.697674418604651) internal successors, (116), 28 states have internal predecessors, (116), 13 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-04 11:27:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:33,877 INFO L93 Difference]: Finished difference Result 11662 states and 14984 transitions. [2025-03-04 11:27:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-04 11:27:33,877 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.697674418604651) internal successors, (116), 28 states have internal predecessors, (116), 13 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 96 [2025-03-04 11:27:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:33,902 INFO L225 Difference]: With dead ends: 11662 [2025-03-04 11:27:33,902 INFO L226 Difference]: Without dead ends: 6110 [2025-03-04 11:27:33,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1344, Invalid=5628, Unknown=0, NotChecked=0, Total=6972 [2025-03-04 11:27:33,917 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:33,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 383 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:27:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2025-03-04 11:27:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 6028. [2025-03-04 11:27:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 4059 states have (on average 1.0344912540034492) internal successors, (4199), 4171 states have internal predecessors, (4199), 1172 states have call successors, (1172), 214 states have call predecessors, (1172), 795 states have return successors, (1953), 1642 states have call predecessors, (1953), 1150 states have call successors, (1953) [2025-03-04 11:27:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 7324 transitions. [2025-03-04 11:27:34,714 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 7324 transitions. Word has length 96 [2025-03-04 11:27:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:34,714 INFO L471 AbstractCegarLoop]: Abstraction has 6028 states and 7324 transitions. [2025-03-04 11:27:34,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.697674418604651) internal successors, (116), 28 states have internal predecessors, (116), 13 states have call successors, (15), 11 states have call predecessors, (15), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-04 11:27:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 7324 transitions. [2025-03-04 11:27:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-04 11:27:34,716 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:34,716 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:34,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-04 11:27:34,916 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 [2025-03-04 11:27:34,917 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:34,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1997819510, now seen corresponding path program 3 times [2025-03-04 11:27:34,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:34,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674382377] [2025-03-04 11:27:34,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:34,920 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-03-04 11:27:34,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-03-04 11:27:34,933 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-04 11:27:34,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:27:35,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:35,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674382377] [2025-03-04 11:27:35,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674382377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:35,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279660572] [2025-03-04 11:27:35,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:35,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:35,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:35,189 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) [2025-03-04 11:27:35,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-04 11:27:35,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-03-04 11:27:35,258 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-03-04 11:27:35,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-04 11:27:35,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:35,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-04 11:27:35,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:27:35,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:27:35,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279660572] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:35,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:35,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-03-04 11:27:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146376713] [2025-03-04 11:27:35,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:35,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-04 11:27:35,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:35,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-04 11:27:35,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2025-03-04 11:27:35,794 INFO L87 Difference]: Start difference. First operand 6028 states and 7324 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:27:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:37,674 INFO L93 Difference]: Finished difference Result 10945 states and 13321 transitions. [2025-03-04 11:27:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-04 11:27:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2025-03-04 11:27:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:37,700 INFO L225 Difference]: With dead ends: 10945 [2025-03-04 11:27:37,700 INFO L226 Difference]: Without dead ends: 10944 [2025-03-04 11:27:37,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2025-03-04 11:27:37,702 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 788 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:37,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 649 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:27:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2025-03-04 11:27:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10900. [2025-03-04 11:27:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10900 states, 7275 states have (on average 1.0357388316151204) internal successors, (7535), 7495 states have internal predecessors, (7535), 2120 states have call successors, (2120), 334 states have call predecessors, (2120), 1503 states have return successors, (3609), 3070 states have call predecessors, (3609), 2098 states have call successors, (3609) [2025-03-04 11:27:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10900 states to 10900 states and 13264 transitions. [2025-03-04 11:27:39,102 INFO L78 Accepts]: Start accepts. Automaton has 10900 states and 13264 transitions. Word has length 91 [2025-03-04 11:27:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:39,102 INFO L471 AbstractCegarLoop]: Abstraction has 10900 states and 13264 transitions. [2025-03-04 11:27:39,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:27:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10900 states and 13264 transitions. [2025-03-04 11:27:39,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-04 11:27:39,105 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:39,105 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:39,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:39,305 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 [2025-03-04 11:27:39,305 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:39,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2745563, now seen corresponding path program 4 times [2025-03-04 11:27:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:39,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533239170] [2025-03-04 11:27:39,306 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 11:27:39,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:39,309 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-04 11:27:39,314 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-04 11:27:39,314 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 11:27:39,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 43 proven. 71 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2025-03-04 11:27:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533239170] [2025-03-04 11:27:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533239170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820538945] [2025-03-04 11:27:39,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 11:27:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:39,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:39,560 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) [2025-03-04 11:27:39,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-04 11:27:39,609 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-03-04 11:27:39,624 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 91 of 91 statements. [2025-03-04 11:27:39,624 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 11:27:39,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:39,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 11:27:39,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-04 11:27:39,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2025-03-04 11:27:40,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820538945] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:40,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:40,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 40 [2025-03-04 11:27:40,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149018301] [2025-03-04 11:27:40,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:40,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-04 11:27:40,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:40,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-04 11:27:40,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2025-03-04 11:27:40,799 INFO L87 Difference]: Start difference. First operand 10900 states and 13264 transitions. Second operand has 41 states, 40 states have (on average 1.875) internal successors, (75), 31 states have internal predecessors, (75), 9 states have call successors, (11), 3 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2025-03-04 11:27:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:47,282 INFO L93 Difference]: Finished difference Result 40082 states and 58409 transitions. [2025-03-04 11:27:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2025-03-04 11:27:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.875) internal successors, (75), 31 states have internal predecessors, (75), 9 states have call successors, (11), 3 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) Word has length 91 [2025-03-04 11:27:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:47,402 INFO L225 Difference]: With dead ends: 40082 [2025-03-04 11:27:47,402 INFO L226 Difference]: Without dead ends: 38981 [2025-03-04 11:27:47,422 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8918 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4423, Invalid=22637, Unknown=0, NotChecked=0, Total=27060 [2025-03-04 11:27:47,423 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 209 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:47,423 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 316 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:27:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38981 states. [2025-03-04 11:27:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38981 to 18407. [2025-03-04 11:27:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18407 states, 11855 states have (on average 1.023281315900464) internal successors, (12131), 12065 states have internal predecessors, (12131), 3710 states have call successors, (3710), 395 states have call predecessors, (3710), 2840 states have return successors, (7522), 5946 states have call predecessors, (7522), 3679 states have call successors, (7522) [2025-03-04 11:27:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18407 states to 18407 states and 23363 transitions. [2025-03-04 11:27:50,457 INFO L78 Accepts]: Start accepts. Automaton has 18407 states and 23363 transitions. Word has length 91 [2025-03-04 11:27:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:50,458 INFO L471 AbstractCegarLoop]: Abstraction has 18407 states and 23363 transitions. [2025-03-04 11:27:50,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.875) internal successors, (75), 31 states have internal predecessors, (75), 9 states have call successors, (11), 3 states have call predecessors, (11), 13 states have return successors, (16), 16 states have call predecessors, (16), 7 states have call successors, (16) [2025-03-04 11:27:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 18407 states and 23363 transitions. [2025-03-04 11:27:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2025-03-04 11:27:50,470 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:50,470 INFO L218 NwaCegarLoop]: trace histogram [18, 16, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:50,671 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 [2025-03-04 11:27:50,671 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:50,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1870843355, now seen corresponding path program 5 times [2025-03-04 11:27:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604705603] [2025-03-04 11:27:50,671 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 11:27:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:50,677 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 167 statements into 13 equivalence classes. [2025-03-04 11:27:50,689 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 167 of 167 statements. [2025-03-04 11:27:50,689 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-04 11:27:50,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 134 proven. 297 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2025-03-04 11:27:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604705603] [2025-03-04 11:27:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604705603] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60450175] [2025-03-04 11:27:51,332 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 11:27:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:51,334 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) [2025-03-04 11:27:51,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-04 11:27:51,399 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 167 statements into 13 equivalence classes. [2025-03-04 11:27:51,429 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 167 of 167 statements. [2025-03-04 11:27:51,429 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-04 11:27:51,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:51,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-04 11:27:51,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 98 proven. 285 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2025-03-04 11:27:51,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 114 proven. 409 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2025-03-04 11:27:58,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60450175] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:58,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:58,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 43] total 72 [2025-03-04 11:27:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382088399] [2025-03-04 11:27:58,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:58,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-04 11:27:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:58,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-04 11:27:58,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4646, Unknown=0, NotChecked=0, Total=5256 [2025-03-04 11:27:58,563 INFO L87 Difference]: Start difference. First operand 18407 states and 23363 transitions. Second operand has 73 states, 72 states have (on average 1.6527777777777777) internal successors, (119), 55 states have internal predecessors, (119), 17 states have call successors, (19), 3 states have call predecessors, (19), 25 states have return successors, (32), 32 states have call predecessors, (32), 15 states have call successors, (32)