./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-recursive-malloc/chunk1-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-recursive-malloc/chunk1-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6a66369f5c9a0270ee2408adc274f8f50150ff97d329dbc5d86329753dd9abac --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:55:21,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:55:21,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2025-03-09 01:55:21,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:55:21,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:55:21,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:55:21,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:55:21,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:55:21,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:55:21,354 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:55:21,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:55:21,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:55:21,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:55:21,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:55:21,355 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:55:21,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:55:21,356 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:55:21,357 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:55:21,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:55:21,357 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:55:21,357 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:55:21,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:55:21,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:55:21,358 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a66369f5c9a0270ee2408adc274f8f50150ff97d329dbc5d86329753dd9abac [2025-03-09 01:55:21,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:55:21,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:55:21,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:55:21,604 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:55:21,604 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:55:21,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-recursive-malloc/chunk1-2.i [2025-03-09 01:55:22,744 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d4d26ea/3bb260a771d24f5ba10e5ed2d6c6ac2a/FLAGc2a4ed82d [2025-03-09 01:55:22,973 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:55:22,977 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-recursive-malloc/chunk1-2.i [2025-03-09 01:55:22,991 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d4d26ea/3bb260a771d24f5ba10e5ed2d6c6ac2a/FLAGc2a4ed82d [2025-03-09 01:55:23,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d4d26ea/3bb260a771d24f5ba10e5ed2d6c6ac2a [2025-03-09 01:55:23,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:55:23,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:55:23,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:55:23,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:55:23,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:55:23,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3867afc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23, skipping insertion in model container [2025-03-09 01:55:23,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:55:23,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:55:23,125 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:55:23,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:55:23,143 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:55:23,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23 WrapperNode [2025-03-09 01:55:23,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:55:23,144 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:55:23,144 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:55:23,144 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:55:23,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,168 INFO L138 Inliner]: procedures = 11, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2025-03-09 01:55:23,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:55:23,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:55:23,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:55:23,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:55:23,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,175 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,182 INFO L175 MemorySlicer]: Split 6 memory accesses to 1 slices as follows [6]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 3 writes are split as follows [3]. [2025-03-09 01:55:23,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,185 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:55:23,188 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:55:23,188 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:55:23,188 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:55:23,189 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (1/1) ... [2025-03-09 01:55:23,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:55:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:55:23,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:55:23,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:55:23,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:55:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:55:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure chunk [2025-03-09 01:55:23,242 INFO L138 BoogieDeclarations]: Found implementation of procedure chunk [2025-03-09 01:55:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:55:23,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:55:23,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:55:23,280 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:55:23,281 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:55:23,344 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-09 01:55:23,344 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:55:23,350 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:55:23,351 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:55:23,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:55:23 BoogieIcfgContainer [2025-03-09 01:55:23,351 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:55:23,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:55:23,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:55:23,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:55:23,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:55:23" (1/3) ... [2025-03-09 01:55:23,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac71040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:55:23, skipping insertion in model container [2025-03-09 01:55:23,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:55:23" (2/3) ... [2025-03-09 01:55:23,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac71040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:55:23, skipping insertion in model container [2025-03-09 01:55:23,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:55:23" (3/3) ... [2025-03-09 01:55:23,357 INFO L128 eAbstractionObserver]: Analyzing ICFG chunk1-2.i [2025-03-09 01:55:23,369 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:55:23,370 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chunk1-2.i that has 2 procedures, 16 locations, 1 initial locations, 0 loop locations, and 2 error locations. [2025-03-09 01:55:23,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:55:23,408 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;@4f48f67e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:55:23,408 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-03-09 01:55:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:55:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-09 01:55:23,415 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:55:23,416 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:55:23,416 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting chunkErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [chunkErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, chunkErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2025-03-09 01:55:23,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:55:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1957229759, now seen corresponding path program 1 times [2025-03-09 01:55:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:55:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664262881] [2025-03-09 01:55:23,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:55:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:55:23,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-09 01:55:23,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-09 01:55:23,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:55:23,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:55:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:55:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:55:23,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664262881] [2025-03-09 01:55:23,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664262881] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:55:23,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:55:23,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-09 01:55:23,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590955613] [2025-03-09 01:55:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:55:23,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-09 01:55:23,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:55:23,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-09 01:55:23,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-09 01:55:23,761 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:55:23,880 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2025-03-09 01:55:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:55:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-09 01:55:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:55:23,888 INFO L225 Difference]: With dead ends: 21 [2025-03-09 01:55:23,888 INFO L226 Difference]: Without dead ends: 10 [2025-03-09 01:55:23,891 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:55:23,895 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:55:23,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:55:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-03-09 01:55:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-03-09 01:55:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2025-03-09 01:55:23,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2025-03-09 01:55:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:55:23,929 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2025-03-09 01:55:23,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2025-03-09 01:55:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-09 01:55:23,929 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:55:23,929 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:55:23,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:55:23,930 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting chunkErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [chunkErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, chunkErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2025-03-09 01:55:23,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:55:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash 544580356, now seen corresponding path program 1 times [2025-03-09 01:55:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:55:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781475292] [2025-03-09 01:55:23,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:55:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:55:23,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:55:23,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:55:23,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:55:23,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:55:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:55:24,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:55:24,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781475292] [2025-03-09 01:55:24,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781475292] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:55:24,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:55:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-09 01:55:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057310515] [2025-03-09 01:55:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:55:24,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-09 01:55:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:55:24,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-09 01:55:24,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-09 01:55:24,116 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:55:24,174 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2025-03-09 01:55:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:55:24,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-09 01:55:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:55:24,175 INFO L225 Difference]: With dead ends: 15 [2025-03-09 01:55:24,175 INFO L226 Difference]: Without dead ends: 14 [2025-03-09 01:55:24,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:55:24,176 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 01:55:24,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:55:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-09 01:55:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-09 01:55:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2025-03-09 01:55:24,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 8 [2025-03-09 01:55:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:55:24,180 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2025-03-09 01:55:24,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2025-03-09 01:55:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-09 01:55:24,181 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:55:24,181 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:55:24,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:55:24,182 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting chunkErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [chunkErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, chunkErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2025-03-09 01:55:24,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:55:24,183 INFO L85 PathProgramCache]: Analyzing trace with hash 216197680, now seen corresponding path program 1 times [2025-03-09 01:55:24,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:55:24,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704983140] [2025-03-09 01:55:24,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:55:24,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:55:24,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:55:24,199 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:55:24,199 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:55:24,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:55:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:55:24,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:55:24,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704983140] [2025-03-09 01:55:24,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704983140] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:55:24,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915584433] [2025-03-09 01:55:24,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:55:24,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:55:24,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:55:24,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:55:24,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:55:24,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:55:24,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:55:24,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:55:24,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:55:24,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-09 01:55:24,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:55:24,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2025-03-09 01:55:24,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-09 01:55:24,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:55:24,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2025-03-09 01:55:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:55:24,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:55:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:55:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915584433] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:55:25,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:55:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 18 [2025-03-09 01:55:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553760289] [2025-03-09 01:55:25,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:55:25,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-09 01:55:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:55:25,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-09 01:55:25,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2025-03-09 01:55:25,096 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:55:25,387 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2025-03-09 01:55:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:55:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-09 01:55:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:55:25,388 INFO L225 Difference]: With dead ends: 14 [2025-03-09 01:55:25,388 INFO L226 Difference]: Without dead ends: 0 [2025-03-09 01:55:25,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2025-03-09 01:55:25,389 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 01:55:25,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:55:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-09 01:55:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-09 01:55:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-09 01:55:25,390 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2025-03-09 01:55:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:55:25,390 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-09 01:55:25,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:55:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-09 01:55:25,390 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-09 01:55:25,393 INFO L782 garLoopResultBuilder]: Registering result SAFE for location chunkErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2025-03-09 01:55:25,393 INFO L782 garLoopResultBuilder]: Registering result SAFE for location chunkErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2025-03-09 01:55:25,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:55:25,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:55:25,600 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2025-03-09 01:55:25,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-09 01:55:25,835 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-09 01:55:25,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.03 01:55:25 BoogieIcfgContainer [2025-03-09 01:55:25,841 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-09 01:55:25,842 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-09 01:55:25,842 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-09 01:55:25,843 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-09 01:55:25,843 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:55:23" (3/4) ... [2025-03-09 01:55:25,845 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-09 01:55:25,849 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure chunk [2025-03-09 01:55:25,853 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2025-03-09 01:55:25,853 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-09 01:55:25,853 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-03-09 01:55:25,853 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-09 01:55:25,905 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-09 01:55:25,906 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-09 01:55:25,906 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-09 01:55:25,907 INFO L158 Benchmark]: Toolchain (without parser) took 2900.30ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 68.3MB in the end (delta: 44.6MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2025-03-09 01:55:25,907 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:55:25,907 INFO L158 Benchmark]: CACSL2BoogieTranslator took 136.84ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 102.7MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:55:25,907 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.12ms. Allocated memory is still 142.6MB. Free memory was 102.7MB in the beginning and 101.7MB in the end (delta: 998.0kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:55:25,907 INFO L158 Benchmark]: Boogie Preprocessor took 18.81ms. Allocated memory is still 142.6MB. Free memory was 101.7MB in the beginning and 100.7MB in the end (delta: 986.9kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:55:25,908 INFO L158 Benchmark]: IcfgBuilder took 162.95ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 90.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:55:25,908 INFO L158 Benchmark]: TraceAbstraction took 2488.87ms. Allocated memory is still 142.6MB. Free memory was 90.2MB in the beginning and 73.8MB in the end (delta: 16.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2025-03-09 01:55:25,908 INFO L158 Benchmark]: Witness Printer took 63.54ms. Allocated memory is still 142.6MB. Free memory was 73.8MB in the beginning and 68.3MB in the end (delta: 5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:55:25,909 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 201.3MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 136.84ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 102.7MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.12ms. Allocated memory is still 142.6MB. Free memory was 102.7MB in the beginning and 101.7MB in the end (delta: 998.0kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.81ms. Allocated memory is still 142.6MB. Free memory was 101.7MB in the beginning and 100.7MB in the end (delta: 986.9kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 162.95ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 90.7MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2488.87ms. Allocated memory is still 142.6MB. Free memory was 90.2MB in the beginning and 73.8MB in the end (delta: 16.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Witness Printer took 63.54ms. Allocated memory is still 142.6MB. Free memory was 73.8MB in the beginning and 68.3MB in the end (delta: 5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 12]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 20 edges, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 33 mSDsluCounter, 86 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 68 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 140 IncrementalHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 18 mSDtfsCounter, 140 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 480 SizeOfPredicates, 9 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 2/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-09 01:55:25,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE