./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/recursified_loop-simple/recursified_nested_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34a8492e255374aad098e162859199083b5b90fe0eb733edf5e3563474d7ceaa --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:37:53,777 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:37:53,810 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:37:53,813 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:37:53,813 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:37:53,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:37:53,831 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:37:53,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:37:53,832 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:37:53,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:37:53,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:37:53,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:37:53,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:37:53,834 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:37:53,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:37:53,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:37:53,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:37:53,835 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 ! call(reach_error())) ) 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 -> 34a8492e255374aad098e162859199083b5b90fe0eb733edf5e3563474d7ceaa [2025-03-03 14:37:54,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:37:54,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:37:54,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:37:54,046 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:37:54,046 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:37:54,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c [2025-03-03 14:37:55,087 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53ec968e/b343a235a17b4670937c7e13ac75693a/FLAGfbd7eddf1 [2025-03-03 14:37:55,286 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:37:55,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c [2025-03-03 14:37:55,292 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53ec968e/b343a235a17b4670937c7e13ac75693a/FLAGfbd7eddf1 [2025-03-03 14:37:55,301 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53ec968e/b343a235a17b4670937c7e13ac75693a [2025-03-03 14:37:55,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:37:55,304 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:37:55,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:37:55,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:37:55,307 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:37:55,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5e713b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55, skipping insertion in model container [2025-03-03 14:37:55,308 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,316 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:37:55,415 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c[1277,1290] [2025-03-03 14:37:55,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:37:55,425 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:37:55,433 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c[1277,1290] [2025-03-03 14:37:55,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:37:55,445 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:37:55,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55 WrapperNode [2025-03-03 14:37:55,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:37:55,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:37:55,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:37:55,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:37:55,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,469 INFO L138 Inliner]: procedures = 12, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2025-03-03 14:37:55,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:37:55,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:37:55,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:37:55,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:37:55,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,478 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,486 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 2 writes are split as follows [0, 2]. [2025-03-03 14:37:55,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,487 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,491 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,493 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,496 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:37:55,497 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:37:55,497 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:37:55,497 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:37:55,498 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (1/1) ... [2025-03-03 14:37:55,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:37:55,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:37:55,524 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) [2025-03-03 14:37:55,527 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 [2025-03-03 14:37:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 14:37:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 14:37:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:37:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_19_to_19_0 [2025-03-03 14:37:55,544 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_19_to_19_0 [2025-03-03 14:37:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:37:55,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:37:55,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 14:37:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 14:37:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:37:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 14:37:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 14:37:55,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 14:37:55,600 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:37:55,602 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:37:55,676 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L41: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-03 14:37:55,681 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2025-03-03 14:37:55,682 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:37:55,689 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:37:55,690 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:37:55,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:37:55 BoogieIcfgContainer [2025-03-03 14:37:55,690 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:37:55,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:37:55,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:37:55,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:37:55,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:37:55" (1/3) ... [2025-03-03 14:37:55,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caa8625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:37:55, skipping insertion in model container [2025-03-03 14:37:55,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:37:55" (2/3) ... [2025-03-03 14:37:55,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caa8625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:37:55, skipping insertion in model container [2025-03-03 14:37:55,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:37:55" (3/3) ... [2025-03-03 14:37:55,698 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_1.c [2025-03-03 14:37:55,709 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:37:55,710 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_1.c that has 2 procedures, 16 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:37:55,750 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:37:55,759 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;@29860b3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:37:55,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:37:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 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) [2025-03-03 14:37:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:37:55,768 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:37:55,768 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:37:55,768 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:37:55,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:37:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1232356904, now seen corresponding path program 1 times [2025-03-03 14:37:55,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:37:55,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570341205] [2025-03-03 14:37:55,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:37:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:37:55,831 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:37:55,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:37:55,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:37:55,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:37:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:37:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570341205] [2025-03-03 14:37:56,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570341205] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:37:56,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:37:56,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 14:37:56,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117080396] [2025-03-03 14:37:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:37:56,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 14:37:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:37:56,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 14:37:56,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 14:37:56,121 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 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 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:37:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:37:56,175 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2025-03-03 14:37:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 14:37:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-03 14:37:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:37:56,180 INFO L225 Difference]: With dead ends: 26 [2025-03-03 14:37:56,180 INFO L226 Difference]: Without dead ends: 14 [2025-03-03 14:37:56,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-03 14:37:56,184 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:37:56,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:37:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-03 14:37:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-03 14:37:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 14:37:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2025-03-03 14:37:56,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2025-03-03 14:37:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:37:56,205 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2025-03-03 14:37:56,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:37:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2025-03-03 14:37:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-03 14:37:56,206 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:37:56,206 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:37:56,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:37:56,207 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:37:56,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:37:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1216467219, now seen corresponding path program 1 times [2025-03-03 14:37:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:37:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911035285] [2025-03-03 14:37:56,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:37:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:37:56,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 14:37:56,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 14:37:56,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:37:56,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:37:56,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:37:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911035285] [2025-03-03 14:37:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911035285] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:37:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509321898] [2025-03-03 14:37:56,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:37:56,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:37:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:37:56,507 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) [2025-03-03 14:37:56,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:37:56,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-03 14:37:56,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-03 14:37:56,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:37:56,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:56,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 14:37:56,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:37:56,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 14:37:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:37:56,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:37:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:37:57,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509321898] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:37:57,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:37:57,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2025-03-03 14:37:57,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605027197] [2025-03-03 14:37:57,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:37:57,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:37:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:37:57,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:37:57,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:37:57,053 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 14:37:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:37:57,155 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2025-03-03 14:37:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:37:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 15 [2025-03-03 14:37:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:37:57,156 INFO L225 Difference]: With dead ends: 22 [2025-03-03 14:37:57,156 INFO L226 Difference]: Without dead ends: 18 [2025-03-03 14:37:57,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:37:57,157 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:37:57,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 66 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:37:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-03 14:37:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2025-03-03 14:37:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 14:37:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2025-03-03 14:37:57,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2025-03-03 14:37:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:37:57,161 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2025-03-03 14:37:57,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 14:37:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2025-03-03 14:37:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 14:37:57,161 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:37:57,161 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:37:57,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 14:37:57,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:37:57,362 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:37:57,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:37:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1022475313, now seen corresponding path program 2 times [2025-03-03 14:37:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:37:57,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539627038] [2025-03-03 14:37:57,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:37:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:37:57,368 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-03 14:37:57,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 14:37:57,373 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:37:57,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 14:37:57,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:37:57,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539627038] [2025-03-03 14:37:57,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539627038] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:37:57,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743745441] [2025-03-03 14:37:57,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:37:57,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:37:57,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:37:57,778 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) [2025-03-03 14:37:57,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:37:57,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-03 14:37:57,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 14:37:57,829 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:37:57,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:57,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-03 14:37:57,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:37:57,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 14:37:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:37:58,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:37:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:37:58,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743745441] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:37:58,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:37:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 18] total 32 [2025-03-03 14:37:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245454296] [2025-03-03 14:37:58,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:37:58,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 14:37:58,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:37:58,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 14:37:58,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:37:58,919 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 32 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 14:37:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:37:59,082 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2025-03-03 14:37:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:37:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 25 [2025-03-03 14:37:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:37:59,083 INFO L225 Difference]: With dead ends: 26 [2025-03-03 14:37:59,083 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 14:37:59,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:37:59,084 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:37:59,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:37:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 14:37:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2025-03-03 14:37:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 14:37:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2025-03-03 14:37:59,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 25 [2025-03-03 14:37:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:37:59,091 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2025-03-03 14:37:59,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2025-03-03 14:37:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2025-03-03 14:37:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 14:37:59,092 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:37:59,092 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:37:59,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:37:59,297 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,SelfDestructingSolverStorable2 [2025-03-03 14:37:59,297 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:37:59,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:37:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash -160467023, now seen corresponding path program 3 times [2025-03-03 14:37:59,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:37:59,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938708373] [2025-03-03 14:37:59,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:37:59,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:37:59,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 6 equivalence classes. [2025-03-03 14:37:59,312 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 14:37:59,312 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 14:37:59,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-03 14:37:59,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:37:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938708373] [2025-03-03 14:37:59,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938708373] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:37:59,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464563532] [2025-03-03 14:37:59,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:37:59,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:37:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:37:59,554 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) [2025-03-03 14:37:59,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:37:59,589 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 35 statements into 6 equivalence classes. [2025-03-03 14:37:59,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 35 of 35 statements. [2025-03-03 14:37:59,611 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 14:37:59,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:37:59,612 WARN L254 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-03 14:37:59,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:37:59,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 14:37:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-03 14:37:59,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:38:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:38:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464563532] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:38:01,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:38:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 26] total 45 [2025-03-03 14:38:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563596332] [2025-03-03 14:38:01,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:38:01,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-03 14:38:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:38:01,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-03 14:38:01,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 14:38:01,806 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 45 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2025-03-03 14:38:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:38:02,076 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2025-03-03 14:38:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:38:02,077 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 35 [2025-03-03 14:38:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:38:02,077 INFO L225 Difference]: With dead ends: 26 [2025-03-03 14:38:02,077 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 14:38:02,078 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=516, Invalid=2346, Unknown=0, NotChecked=0, Total=2862 [2025-03-03 14:38:02,079 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:38:02,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 64 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:38:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 14:38:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 14:38:02,079 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) [2025-03-03 14:38:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 14:38:02,079 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2025-03-03 14:38:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:38:02,079 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 14:38:02,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2025-03-03 14:38:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 14:38:02,080 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 14:38:02,085 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 14:38:02,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 14:38:02,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:38:02,291 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1] [2025-03-03 14:38:02,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-03 14:38:02,379 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-03 14:38:02,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 02:38:02 BoogieIcfgContainer [2025-03-03 14:38:02,383 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-03 14:38:02,383 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-03 14:38:02,383 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-03 14:38:02,383 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-03 14:38:02,384 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:37:55" (3/4) ... [2025-03-03 14:38:02,385 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-03 14:38:02,393 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_19_to_19_0 [2025-03-03 14:38:02,397 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-03-03 14:38:02,397 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-03 14:38:02,397 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-03 14:38:02,397 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-03 14:38:02,445 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-03 14:38:02,445 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-03 14:38:02,445 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-03 14:38:02,446 INFO L158 Benchmark]: Toolchain (without parser) took 7142.04ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 104.0MB in the beginning and 184.6MB in the end (delta: -80.5MB). Peak memory consumption was 119.0MB. Max. memory is 16.1GB. [2025-03-03 14:38:02,446 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 14:38:02,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.40ms. Allocated memory is still 142.6MB. Free memory was 104.0MB in the beginning and 93.6MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:38:02,447 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.80ms. Allocated memory is still 142.6MB. Free memory was 93.6MB in the beginning and 93.0MB in the end (delta: 601.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 14:38:02,447 INFO L158 Benchmark]: Boogie Preprocessor took 25.89ms. Allocated memory is still 142.6MB. Free memory was 93.0MB in the beginning and 91.8MB in the end (delta: 1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:38:02,448 INFO L158 Benchmark]: IcfgBuilder took 193.20ms. Allocated memory is still 142.6MB. Free memory was 91.8MB in the beginning and 81.3MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-03 14:38:02,448 INFO L158 Benchmark]: TraceAbstraction took 6691.09ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 80.1MB in the beginning and 188.4MB in the end (delta: -108.2MB). Peak memory consumption was 93.9MB. Max. memory is 16.1GB. [2025-03-03 14:38:02,449 INFO L158 Benchmark]: Witness Printer took 62.15ms. Allocated memory is still 343.9MB. Free memory was 188.4MB in the beginning and 184.6MB in the end (delta: 3.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-03 14:38:02,450 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.40ms. Allocated memory is still 142.6MB. Free memory was 104.0MB in the beginning and 93.6MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.80ms. Allocated memory is still 142.6MB. Free memory was 93.6MB in the beginning and 93.0MB in the end (delta: 601.3kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.89ms. Allocated memory is still 142.6MB. Free memory was 93.0MB in the beginning and 91.8MB in the end (delta: 1.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 193.20ms. Allocated memory is still 142.6MB. Free memory was 91.8MB in the beginning and 81.3MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 6691.09ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 80.1MB in the beginning and 188.4MB in the end (delta: -108.2MB). Peak memory consumption was 93.9MB. Max. memory is 16.1GB. * Witness Printer took 62.15ms. Allocated memory is still 343.9MB. Free memory was 188.4MB in the beginning and 184.6MB in the end (delta: 3.8MB). There was no memory consumed. 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: 48]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 253 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 216 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 351 IncrementalHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 37 mSDtfsCounter, 351 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, InterpolantAutomatonStates: 41, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 225 ConstructedInterpolants, 0 QuantifiedInterpolants, 2511 SizeOfPredicates, 24 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 126/303 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-03 14:38:02,466 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