java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AbstractInterpretationInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-5-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fa1c628-m [2019-01-31 15:27:23,362 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-31 15:27:23,364 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-31 15:27:23,376 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-31 15:27:23,377 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-31 15:27:23,378 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-31 15:27:23,379 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-31 15:27:23,381 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-31 15:27:23,383 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-31 15:27:23,384 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-31 15:27:23,385 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-31 15:27:23,412 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_oct.epf [2019-01-31 15:27:23,430 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-31 15:27:23,430 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-31 15:27:23,431 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-31 15:27:23,431 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-31 15:27:23,431 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-31 15:27:23,431 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-31 15:27:23,432 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-31 15:27:23,432 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-31 15:27:23,432 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-31 15:27:23,432 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-31 15:27:23,433 INFO L133 SettingsManager]: * Abstract domain=OctagonDomain [2019-01-31 15:27:23,434 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-31 15:27:23,434 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-31 15:27:23,435 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-31 15:27:23,435 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-31 15:27:23,435 INFO L133 SettingsManager]: * Use SBE=true [2019-01-31 15:27:23,436 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-31 15:27:23,436 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-31 15:27:23,436 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-31 15:27:23,436 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-31 15:27:23,436 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-31 15:27:23,437 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-31 15:27:23,438 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-31 15:27:23,438 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-31 15:27:23,439 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-31 15:27:23,439 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-31 15:27:23,439 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-31 15:27:23,439 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-31 15:27:23,440 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-31 15:27:23,440 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-31 15:27:23,440 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 15:27:23,440 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-31 15:27:23,440 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-31 15:27:23,442 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-31 15:27:23,442 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-31 15:27:23,442 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-31 15:27:23,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in [2019-01-31 15:27:23,442 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-31 15:27:23,442 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-31 15:27:23,492 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-31 15:27:23,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-31 15:27:23,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-31 15:27:23,514 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-31 15:27:23,515 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-31 15:27:23,515 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-5-limited.bpl [2019-01-31 15:27:23,516 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-5-limited.bpl' [2019-01-31 15:27:23,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-31 15:27:23,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-31 15:27:23,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-31 15:27:23,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-31 15:27:23,579 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-31 15:27:23,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-31 15:27:23,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-31 15:27:23,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-31 15:27:23,652 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-31 15:27:23,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... [2019-01-31 15:27:23,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-31 15:27:23,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-31 15:27:23,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-31 15:27:23,686 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-31 15:27:23,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 31.01 03:27:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8092 -smt2 -in -t:10000 [2019-01-31 15:27:23,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-31 15:27:23,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-31 15:27:24,417 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-31 15:27:24,417 INFO L286 CfgBuilder]: Removed 13 assue(true) statements. [2019-01-31 15:27:24,419 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:27:24 BoogieIcfgContainer [2019-01-31 15:27:24,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-31 15:27:24,420 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-01-31 15:27:24,420 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-01-31 15:27:24,420 INFO L276 PluginConnector]: Abstract Interpretation initialized [2019-01-31 15:27:24,421 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "speedup-poc-dd-5-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:27:24" (1/1) ... [2019-01-31 15:27:24,472 INFO L101 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-31 15:27:24,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-31 15:27:24,826 INFO L272 AbstractInterpreter]: Visited 17 different actions 17 times. Never merged. Never widened. Found 5 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-31 15:27:24,828 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-01-31 15:27:24,830 INFO L168 Benchmark]: Toolchain (without parser) took 1252.12 ms. Allocated memory is still 138.4 MB. Free memory was 105.5 MB in the beginning and 69.2 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. [2019-01-31 15:27:24,834 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory is still 106.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-31 15:27:24,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.73 ms. Allocated memory is still 138.4 MB. Free memory was 105.5 MB in the beginning and 102.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-01-31 15:27:24,836 INFO L168 Benchmark]: Boogie Preprocessor took 33.99 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 101.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-31 15:27:24,838 INFO L168 Benchmark]: RCFGBuilder took 733.09 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 83.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2019-01-31 15:27:24,839 INFO L168 Benchmark]: Abstract Interpretation took 407.81 ms. Allocated memory is still 138.4 MB. Free memory was 83.5 MB in the beginning and 69.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-01-31 15:27:24,844 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - GenericResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory is still 106.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 72.73 ms. Allocated memory is still 138.4 MB. Free memory was 105.5 MB in the beginning and 102.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.99 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 101.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 733.09 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 83.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 407.81 ms. Allocated memory is still 138.4 MB. Free memory was 83.5 MB in the beginning and 69.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 48]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L23] assume p1 < p2; [L24] assume p2 < p3; [L25] assume p3 < p4; [L26] assume p4 < p5; [L28] #memory_int[p1] := 0; [L29] #memory_int[p2] := 0; [L30] #memory_int[p3] := 0; [L31] #memory_int[p4] := 0; [L32] #memory_int[p5] := 0; [L48] assert #memory_int[p1] >= 0; - UnprovableResult [Line: 49]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L23] assume p1 < p2; [L24] assume p2 < p3; [L25] assume p3 < p4; [L26] assume p4 < p5; [L28] #memory_int[p1] := 0; [L29] #memory_int[p2] := 0; [L30] #memory_int[p3] := 0; [L31] #memory_int[p4] := 0; [L32] #memory_int[p5] := 0; [L48] assert #memory_int[p1] >= 0; [L49] assert #memory_int[p2] <= 0; - UnprovableResult [Line: 50]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L23] assume p1 < p2; [L24] assume p2 < p3; [L25] assume p3 < p4; [L26] assume p4 < p5; [L28] #memory_int[p1] := 0; [L29] #memory_int[p2] := 0; [L30] #memory_int[p3] := 0; [L31] #memory_int[p4] := 0; [L32] #memory_int[p5] := 0; [L48] assert #memory_int[p1] >= 0; [L49] assert #memory_int[p2] <= 0; [L50] assert #memory_int[p3] >= 0; - UnprovableResult [Line: 51]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L23] assume p1 < p2; [L24] assume p2 < p3; [L25] assume p3 < p4; [L26] assume p4 < p5; [L28] #memory_int[p1] := 0; [L29] #memory_int[p2] := 0; [L30] #memory_int[p3] := 0; [L31] #memory_int[p4] := 0; [L32] #memory_int[p5] := 0; [L48] assert #memory_int[p1] >= 0; [L49] assert #memory_int[p2] <= 0; [L50] assert #memory_int[p3] >= 0; [L51] assert #memory_int[p4] <= 0; - UnprovableResult [Line: 52]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L56-L57] modifies #valid; [L56-L58] ensures old(#valid)[ptr] == 0; [L56-L59] ensures #valid == old(#valid)[ptr := 1]; [L23] assume p1 < p2; [L24] assume p2 < p3; [L25] assume p3 < p4; [L26] assume p4 < p5; [L28] #memory_int[p1] := 0; [L29] #memory_int[p2] := 0; [L30] #memory_int[p3] := 0; [L31] #memory_int[p4] := 0; [L32] #memory_int[p5] := 0; [L48] assert #memory_int[p1] >= 0; [L49] assert #memory_int[p2] <= 0; [L50] assert #memory_int[p3] >= 0; [L51] assert #memory_int[p4] <= 0; [L52] assert #memory_int[p5] >= 0; RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...