./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.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 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 15:54:25,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 15:54:25,919 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 15:54:25,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 15:54:25,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 15:54:25,938 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 15:54:25,938 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 15:54:25,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 15:54:25,938 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 15:54:25,939 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 15:54:25,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 15:54:25,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 15:54:25,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 15:54:25,940 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 15:54:25,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 15:54:25,941 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 15:54:25,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 15:54:25,941 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 15:54:25,941 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 15:54:25,941 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 15:54:25,941 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 15:54:25,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 15:54:25,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 15:54:25,943 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 15:54:25,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 15:54:25,943 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 15:54:25,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 15:54:25,943 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 -> 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 [2025-03-16 15:54:26,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 15:54:26,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 15:54:26,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 15:54:26,171 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 15:54:26,171 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 15:54:26,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2025-03-16 15:54:27,334 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad565afdc/e715576992b54f749d944772f465762e/FLAG022dad909 [2025-03-16 15:54:27,582 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 15:54:27,583 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2025-03-16 15:54:27,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad565afdc/e715576992b54f749d944772f465762e/FLAG022dad909 [2025-03-16 15:54:27,921 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad565afdc/e715576992b54f749d944772f465762e [2025-03-16 15:54:27,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 15:54:27,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 15:54:27,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 15:54:27,925 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 15:54:27,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 15:54:27,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 03:54:27" (1/1) ... [2025-03-16 15:54:27,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0d30d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:27, skipping insertion in model container [2025-03-16 15:54:27,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 03:54:27" (1/1) ... [2025-03-16 15:54:27,940 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 15:54:28,048 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2025-03-16 15:54:28,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 15:54:28,065 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 15:54:28,082 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2025-03-16 15:54:28,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 15:54:28,101 INFO L204 MainTranslator]: Completed translation [2025-03-16 15:54:28,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28 WrapperNode [2025-03-16 15:54:28,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 15:54:28,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 15:54:28,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 15:54:28,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 15:54:28,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,129 INFO L138 Inliner]: procedures = 18, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 149 [2025-03-16 15:54:28,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 15:54:28,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 15:54:28,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 15:54:28,129 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 15:54:28,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,156 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 11, 8]. 52 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 0 writes are split as follows [0, 0, 0]. [2025-03-16 15:54:28,159 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,159 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,166 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 15:54:28,175 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 15:54:28,175 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 15:54:28,175 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 15:54:28,175 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (1/1) ... [2025-03-16 15:54:28,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 15:54:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 15:54:28,200 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) [2025-03-16 15:54:28,207 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 [2025-03-16 15:54:28,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 15:54:28,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2025-03-16 15:54:28,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2025-03-16 15:54:28,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 15:54:28,265 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 15:54:28,267 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 15:54:28,383 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L44: havoc main_~__tmp_1~0#1, main_~__VERIFIER_assert__cond~0#1;havoc main_~main____CPAchecker_TMP_1~0#1;call ULTIMATE.dealloc(main_~#main__min~0#1.base, main_~#main__min~0#1.offset);havoc main_~#main__min~0#1.base, main_~#main__min~0#1.offset;call ULTIMATE.dealloc(main_~#main__max~0#1.base, main_~#main__max~0#1.offset);havoc main_~#main__max~0#1.base, main_~#main__max~0#1.offset; [2025-03-16 15:54:28,391 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2025-03-16 15:54:28,391 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 15:54:28,398 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 15:54:28,398 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 15:54:28,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 03:54:28 BoogieIcfgContainer [2025-03-16 15:54:28,399 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 15:54:28,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 15:54:28,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 15:54:28,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 15:54:28,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 03:54:27" (1/3) ... [2025-03-16 15:54:28,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c521d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 03:54:28, skipping insertion in model container [2025-03-16 15:54:28,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:28" (2/3) ... [2025-03-16 15:54:28,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c521d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 03:54:28, skipping insertion in model container [2025-03-16 15:54:28,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 03:54:28" (3/3) ... [2025-03-16 15:54:28,407 INFO L128 eAbstractionObserver]: Analyzing ICFG interpolation.c.v+nlh-reducer.c [2025-03-16 15:54:28,416 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 15:54:28,418 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG interpolation.c.v+nlh-reducer.c that has 1 procedures, 24 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 15:54:28,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 15:54:28,464 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;@d9eb125, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 15:54:28,464 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 15:54:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 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) [2025-03-16 15:54:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 15:54:28,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 15:54:28,473 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 15:54:28,474 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 15:54:28,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 15:54:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1800049565, now seen corresponding path program 1 times [2025-03-16 15:54:28,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 15:54:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907408192] [2025-03-16 15:54:28,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 15:54:28,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 15:54:28,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 15:54:28,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 15:54:28,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 15:54:28,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 15:54:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 15:54:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 15:54:28,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907408192] [2025-03-16 15:54:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907408192] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 15:54:28,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 15:54:28,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 15:54:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500857928] [2025-03-16 15:54:28,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 15:54:28,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 15:54:28,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 15:54:28,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 15:54:28,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 15:54:28,721 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 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) Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2025-03-16 15:54:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 15:54:28,760 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2025-03-16 15:54:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 15:54:28,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) Word has length 12 [2025-03-16 15:54:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 15:54:28,766 INFO L225 Difference]: With dead ends: 31 [2025-03-16 15:54:28,766 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 15:54:28,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 15:54:28,772 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 15:54:28,773 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 15:54:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 15:54:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-16 15:54:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2025-03-16 15:54:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2025-03-16 15:54:28,795 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2025-03-16 15:54:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 15:54:28,795 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2025-03-16 15:54:28,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2025-03-16 15:54:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2025-03-16 15:54:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 15:54:28,795 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 15:54:28,797 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 15:54:28,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 15:54:28,797 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 15:54:28,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 15:54:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1801032668, now seen corresponding path program 1 times [2025-03-16 15:54:28,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 15:54:28,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477567554] [2025-03-16 15:54:28,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 15:54:28,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 15:54:28,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 15:54:28,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 15:54:28,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 15:54:28,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 15:54:28,826 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-16 15:54:28,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 15:54:28,840 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 15:54:28,843 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 15:54:28,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 15:54:28,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-16 15:54:28,859 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-16 15:54:28,860 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 15:54:28,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 15:54:28,863 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-16 15:54:28,875 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 15:54:28,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 03:54:28 BoogieIcfgContainer [2025-03-16 15:54:28,878 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 15:54:28,880 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 15:54:28,880 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 15:54:28,880 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 15:54:28,880 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 03:54:28" (3/4) ... [2025-03-16 15:54:28,882 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-16 15:54:28,882 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 15:54:28,883 INFO L158 Benchmark]: Toolchain (without parser) took 959.20ms. Allocated memory is still 167.8MB. Free memory was 123.3MB in the beginning and 65.2MB in the end (delta: 58.1MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2025-03-16 15:54:28,883 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 116.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 15:54:28,883 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.19ms. Allocated memory is still 167.8MB. Free memory was 123.3MB in the beginning and 111.6MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 15:54:28,883 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.60ms. Allocated memory is still 167.8MB. Free memory was 111.6MB in the beginning and 110.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 15:54:28,884 INFO L158 Benchmark]: Boogie Preprocessor took 44.61ms. Allocated memory is still 167.8MB. Free memory was 110.1MB in the beginning and 108.1MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 15:54:28,884 INFO L158 Benchmark]: IcfgBuilder took 224.03ms. Allocated memory is still 167.8MB. Free memory was 108.1MB in the beginning and 93.7MB in the end (delta: 14.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 15:54:28,884 INFO L158 Benchmark]: TraceAbstraction took 477.67ms. Allocated memory is still 167.8MB. Free memory was 93.7MB in the beginning and 66.2MB in the end (delta: 27.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-16 15:54:28,884 INFO L158 Benchmark]: Witness Printer took 2.68ms. Allocated memory is still 167.8MB. Free memory is still 65.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 15:54:28,885 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 116.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.19ms. Allocated memory is still 167.8MB. Free memory was 123.3MB in the beginning and 111.6MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.60ms. Allocated memory is still 167.8MB. Free memory was 111.6MB in the beginning and 110.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.61ms. Allocated memory is still 167.8MB. Free memory was 110.1MB in the beginning and 108.1MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 224.03ms. Allocated memory is still 167.8MB. Free memory was 108.1MB in the beginning and 93.7MB in the end (delta: 14.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 477.67ms. Allocated memory is still 167.8MB. Free memory was 93.7MB in the beginning and 66.2MB in the end (delta: 27.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 2.68ms. Allocated memory is still 167.8MB. Free memory is still 65.2MB. 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 - UnprovableResult [Line: 51]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 24, overapproximation of someBinaryFLOATComparisonOperation at line 32, overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryDOUBLEComparisonOperation at line 38, overapproximation of to_real at line 18, overapproximation of someBinaryArithmeticFLOAToperation at line 36. Possible FailurePath: [L1] int __return_main; [L12] int __return_132; [L15] int main__i; [L16] float main__z; [L17] float main__t; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L18] float main__min[5] = { 5, 10, 12, 30, 150 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L19] float main__max[5] = { 10, 12, 30, 150, 300 }; [L20] main__t = __VERIFIER_nondet_float() [L21] int main____CPAchecker_TMP_0; [L22] EXPR main__min[0] VAL [__return_132=0, __return_main=0] [L22] COND TRUE main__t >= (main__min[0]) [L24] EXPR main__max[4UL] VAL [__return_132=0, __return_main=0] [L24] COND TRUE main__t <= (main__max[4UL]) [L26] main____CPAchecker_TMP_0 = 1 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_0=1, main__max={4:0}] [L27] COND TRUE main____CPAchecker_TMP_0 != 0 [L29] main__i = 0 VAL [__return_132=0, __return_main=0, main__i=0, main__max={4:0}] [L30] COND TRUE main__i < 5UL [L32] EXPR main__max[main__i] VAL [__return_132=0, __return_main=0] [L32] COND TRUE main__t <= (main__max[main__i]) [L36] EXPR main__min[main__i] [L36] EXPR main__max[main__i] [L36] EXPR main__min[main__i] [L36] main__z = (main__t - (main__min[main__i])) / ((main__max[main__i]) - (main__min[main__i])) [L37] int main____CPAchecker_TMP_1; VAL [__return_132=0, __return_main=0, main__i=0, main__max={4:0}] [L38] COND FALSE !(main__z >= 0.0) VAL [__return_132=0, __return_main=0, main__i=0, main__max={4:0}] [L64] main____CPAchecker_TMP_1 = 0 VAL [__return_132=0, __return_main=0, main____CPAchecker_TMP_1=0, main__i=0, main__max={4:0}] [L45] int __tmp_1; [L46] __tmp_1 = main____CPAchecker_TMP_1 [L47] int __VERIFIER_assert__cond; [L48] __VERIFIER_assert__cond = __tmp_1 VAL [__VERIFIER_assert__cond=0, __return_132=0, __return_main=0, main__i=0, main__max={4:0}] [L49] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_132=0, __return_main=0, main__i=0, main__max={4:0}] [L51] reach_error() VAL [__return_132=0, __return_main=0, main__i=0, main__max={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 37 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 117 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 85 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21 IncrementalHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 32 mSDtfsCounter, 21 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-16 15:54:28,896 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/float-benchs/interpolation.c.v+nlh-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 15:54:30,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 15:54:30,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2025-03-16 15:54:30,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 15:54:30,780 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 15:54:30,802 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 15:54:30,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 15:54:30,803 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 15:54:30,804 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 15:54:30,804 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 15:54:30,805 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 15:54:30,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 15:54:30,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 15:54:30,805 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 15:54:30,805 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 15:54:30,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 15:54:30,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 15:54:30,807 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 15:54:30,807 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 15:54:30,807 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 15:54:30,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 15:54:30,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 15:54:30,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 15:54:30,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 15:54:30,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 15:54:30,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 15:54:30,809 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 -> 3507c00d68b8e41390815967879286d70904cb2355267878593fbddaafb4b556 [2025-03-16 15:54:31,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 15:54:31,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 15:54:31,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 15:54:31,033 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 15:54:31,033 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 15:54:31,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2025-03-16 15:54:32,211 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131c7b306/6973289b92744c32a2da7ea672c3a43b/FLAG2c0e8be38 [2025-03-16 15:54:32,399 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 15:54:32,400 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/interpolation.c.v+nlh-reducer.c [2025-03-16 15:54:32,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131c7b306/6973289b92744c32a2da7ea672c3a43b/FLAG2c0e8be38 [2025-03-16 15:54:32,422 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131c7b306/6973289b92744c32a2da7ea672c3a43b [2025-03-16 15:54:32,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 15:54:32,425 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 15:54:32,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 15:54:32,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 15:54:32,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 15:54:32,430 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190536a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32, skipping insertion in model container [2025-03-16 15:54:32,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,445 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 15:54:32,552 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2025-03-16 15:54:32,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 15:54:32,574 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 15:54:32,590 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/float-benchs/interpolation.c.v+nlh-reducer.c[1314,1327] [2025-03-16 15:54:32,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 15:54:32,608 INFO L204 MainTranslator]: Completed translation [2025-03-16 15:54:32,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32 WrapperNode [2025-03-16 15:54:32,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 15:54:32,609 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 15:54:32,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 15:54:32,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 15:54:32,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,634 INFO L138 Inliner]: procedures = 19, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 150 [2025-03-16 15:54:32,634 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 15:54:32,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 15:54:32,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 15:54:32,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 15:54:32,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,646 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,656 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 11, 8]. 52 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 0 writes are split as follows [0, 0, 0]. [2025-03-16 15:54:32,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,663 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,670 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 15:54:32,670 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 15:54:32,671 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 15:54:32,671 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 15:54:32,671 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (1/1) ... [2025-03-16 15:54:32,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 15:54:32,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 15:54:32,698 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) [2025-03-16 15:54:32,702 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 [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4#0 [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4#1 [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE4#2 [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-16 15:54:32,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-16 15:54:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 15:54:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#0 [2025-03-16 15:54:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#1 [2025-03-16 15:54:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4#2 [2025-03-16 15:54:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 15:54:32,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 15:54:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 15:54:32,773 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 15:54:32,774 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 15:54:37,167 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L44: havoc main_~__tmp_1~0#1, main_~__VERIFIER_assert__cond~0#1;havoc main_~main____CPAchecker_TMP_1~0#1;call ULTIMATE.dealloc(main_~#main__min~0#1.base, main_~#main__min~0#1.offset);havoc main_~#main__min~0#1.base, main_~#main__min~0#1.offset;call ULTIMATE.dealloc(main_~#main__max~0#1.base, main_~#main__max~0#1.offset);havoc main_~#main__max~0#1.base, main_~#main__max~0#1.offset; [2025-03-16 15:54:37,172 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-03-16 15:54:37,172 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 15:54:37,177 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 15:54:37,177 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 15:54:37,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 03:54:37 BoogieIcfgContainer [2025-03-16 15:54:37,178 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 15:54:37,179 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 15:54:37,179 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 15:54:37,182 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 15:54:37,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 03:54:32" (1/3) ... [2025-03-16 15:54:37,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f320da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 03:54:37, skipping insertion in model container [2025-03-16 15:54:37,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 03:54:32" (2/3) ... [2025-03-16 15:54:37,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f320da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 03:54:37, skipping insertion in model container [2025-03-16 15:54:37,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 03:54:37" (3/3) ... [2025-03-16 15:54:37,184 INFO L128 eAbstractionObserver]: Analyzing ICFG interpolation.c.v+nlh-reducer.c [2025-03-16 15:54:37,193 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 15:54:37,194 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG interpolation.c.v+nlh-reducer.c that has 1 procedures, 24 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 15:54:37,222 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 15:54:37,232 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;@776a0eef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 15:54:37,232 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 15:54:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 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) [2025-03-16 15:54:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 15:54:37,239 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 15:54:37,239 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 15:54:37,240 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 15:54:37,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 15:54:37,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1800049565, now seen corresponding path program 1 times [2025-03-16 15:54:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 15:54:37,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884640820] [2025-03-16 15:54:37,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 15:54:37,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2025-03-16 15:54:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2025-03-16 15:54:37,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2025-03-16 15:54:37,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2025-03-16 15:54:37,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 15:54:37,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 15:54:37,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 15:54:37,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 15:54:37,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 15:54:37,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 15:54:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 15:54:37,602 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 15:54:37,602 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 15:54:37,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884640820] [2025-03-16 15:54:37,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884640820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 15:54:37,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 15:54:37,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 15:54:37,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040891427] [2025-03-16 15:54:37,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 15:54:37,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 15:54:37,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 15:54:37,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 15:54:37,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 15:54:37,625 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 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) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-16 15:54:39,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 15:54:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 15:54:39,350 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2025-03-16 15:54:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 15:54:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 12 [2025-03-16 15:54:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 15:54:39,356 INFO L225 Difference]: With dead ends: 31 [2025-03-16 15:54:39,356 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 15:54:39,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 15:54:39,359 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-16 15:54:39,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-16 15:54:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 15:54:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-16 15:54:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2025-03-16 15:54:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2025-03-16 15:54:39,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2025-03-16 15:54:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 15:54:39,380 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2025-03-16 15:54:39,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2025-03-16 15:54:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2025-03-16 15:54:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 15:54:39,380 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 15:54:39,380 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 15:54:39,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2025-03-16 15:54:39,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2025-03-16 15:54:39,581 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 15:54:39,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 15:54:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1801032668, now seen corresponding path program 1 times [2025-03-16 15:54:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 15:54:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94826815] [2025-03-16 15:54:39,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 15:54:39,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2025-03-16 15:54:39,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2025-03-16 15:54:39,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2025-03-16 15:54:39,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2025-03-16 15:54:39,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 15:54:39,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 15:54:39,852 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 15:54:39,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 15:54:39,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 15:54:39,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 15:54:40,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 15:54:40,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2025-03-16 15:54:40,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 99 treesize of output 51 [2025-03-16 15:55:12,063 WARN L286 SmtUtils]: Spent 11.97s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 15:55:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 15:55:15,353 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 15:55:15,353 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 15:55:15,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94826815] [2025-03-16 15:55:15,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94826815] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 15:55:15,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 15:55:15,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-16 15:55:15,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047380921] [2025-03-16 15:55:15,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 15:55:15,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 15:55:15,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 15:55:15,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 15:55:15,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-16 15:55:15,355 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2025-03-16 15:55:19,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 15:55:21,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:24,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:26,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:30,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:34,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:38,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:42,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:46,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:50,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:54,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:55:58,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:56:03,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:56:05,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:56:06,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:56:08,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-16 15:56:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 15:56:08,076 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2025-03-16 15:56:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 15:56:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) Word has length 12 [2025-03-16 15:56:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 15:56:08,077 INFO L225 Difference]: With dead ends: 29 [2025-03-16 15:56:08,077 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 15:56:08,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-16 15:56:08,078 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.7s IncrementalHoareTripleChecker+Time [2025-03-16 15:56:08,078 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 9 Unknown, 0 Unchecked, 52.7s Time] [2025-03-16 15:56:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 15:56:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2025-03-16 15:56:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2025-03-16 15:56:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2025-03-16 15:56:08,080 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2025-03-16 15:56:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 15:56:08,080 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2025-03-16 15:56:08,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2025-03-16 15:56:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2025-03-16 15:56:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 15:56:08,081 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 15:56:08,081 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 15:56:08,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2025-03-16 15:56:08,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2025-03-16 15:56:08,281 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 15:56:08,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 15:56:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash -30177337, now seen corresponding path program 1 times [2025-03-16 15:56:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 15:56:08,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362881132] [2025-03-16 15:56:08,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 15:56:08,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2025-03-16 15:56:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2025-03-16 15:56:08,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2025-03-16 15:56:08,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2025-03-16 15:56:08,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 15:56:08,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 15:56:08,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 15:56:08,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 15:56:08,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 15:56:08,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 15:56:09,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 15:56:09,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2025-03-16 15:56:09,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 99 treesize of output 51