java -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_compound_exp_cong.epf -i ../../../trunk/examples/Backtranslation/regression/bpl/SpecificationsInvariant.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 12:12:25,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 12:12:25,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 12:12:25,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 12:12:25,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 12:12:25,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 12:12:25,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 12:12:25,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 12:12:25,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 12:12:25,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 12:12:25,474 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 12:12:25,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 12:12:25,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 12:12:25,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 12:12:25,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 12:12:25,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 12:12:25,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 12:12:25,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 12:12:25,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 12:12:25,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 12:12:25,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 12:12:25,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 12:12:25,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 12:12:25,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 12:12:25,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 12:12:25,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 12:12:25,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 12:12:25,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 12:12:25,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 12:12:25,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 12:12:25,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 12:12:25,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 12:12:25,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 12:12:25,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 12:12:25,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 12:12:25,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 12:12:25,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 12:12:25,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 12:12:25,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 12:12:25,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 12:12:25,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 12:12:25,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-08-05 12:12:25,530 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-05 12:12:25,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-05 12:12:25,531 INFO L136 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-08-05 12:12:25,531 INFO L138 SettingsManager]: * Show backtranslation warnings=false [2019-08-05 12:12:25,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-08-05 12:12:25,533 INFO L138 SettingsManager]: * User list type=DISABLED [2019-08-05 12:12:25,533 INFO L138 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-08-05 12:12:25,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-08-05 12:12:25,534 INFO L138 SettingsManager]: * Explicit value domain=true [2019-08-05 12:12:25,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-08-05 12:12:25,534 INFO L138 SettingsManager]: * Octagon Domain=false [2019-08-05 12:12:25,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-08-05 12:12:25,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-08-05 12:12:25,535 INFO L138 SettingsManager]: * Interval Domain=false [2019-08-05 12:12:25,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-05 12:12:25,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-05 12:12:25,536 INFO L138 SettingsManager]: * Use SBE=true [2019-08-05 12:12:25,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-05 12:12:25,537 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-05 12:12:25,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-05 12:12:25,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-05 12:12:25,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-05 12:12:25,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-05 12:12:25,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-05 12:12:25,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-05 12:12:25,538 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-05 12:12:25,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-05 12:12:25,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-05 12:12:25,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-05 12:12:25,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-05 12:12:25,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-05 12:12:25,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-05 12:12:25,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-05 12:12:25,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-05 12:12:25,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-05 12:12:25,541 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-08-05 12:12:25,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-05 12:12:25,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-05 12:12:25,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-05 12:12:25,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-08-05 12:12:25,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 12:12:25,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 12:12:25,610 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 12:12:25,615 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 12:12:25,616 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 12:12:25,616 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/Backtranslation/regression/bpl/SpecificationsInvariant.bpl [2019-08-05 12:12:25,617 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/Backtranslation/regression/bpl/SpecificationsInvariant.bpl' [2019-08-05 12:12:25,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 12:12:25,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 12:12:25,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 12:12:25,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 12:12:25,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 12:12:25,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,690 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 12:12:25,690 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 12:12:25,690 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 12:12:25,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 12:12:25,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 12:12:25,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 12:12:25,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 12:12:25,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (1/1) ... [2019-08-05 12:12:25,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 12:12:25,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 12:12:25,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 12:12:25,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 12:12:25,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:12:25" (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:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-05 12:12:25,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Main given in one single declaration [2019-08-05 12:12:25,801 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2019-08-05 12:12:25,801 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2019-08-05 12:12:25,801 INFO L124 BoogieDeclarations]: Specification and implementation of procedure inc given in one single declaration [2019-08-05 12:12:25,801 INFO L130 BoogieDeclarations]: Found specification of procedure inc [2019-08-05 12:12:25,802 INFO L138 BoogieDeclarations]: Found implementation of procedure inc [2019-08-05 12:12:26,065 WARN L731 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-08-05 12:12:26,129 INFO L275 CfgBuilder]: Using library mode [2019-08-05 12:12:26,130 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-08-05 12:12:26,131 INFO L202 PluginConnector]: Adding new model SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 12:12:26 BoogieIcfgContainer [2019-08-05 12:12:26,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 12:12:26,134 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-08-05 12:12:26,134 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-08-05 12:12:26,138 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-08-05 12:12:26,140 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "SpecificationsInvariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 12:12:26" (1/1) ... [2019-08-05 12:12:26,169 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-08-05 12:12:26,337 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-08-05 12:12:26,369 INFO L272 AbstractInterpreter]: Visited 21 different actions 41 times. Merged at 6 different actions 12 times. Never widened. Performed 134 root evaluator evaluations with a maximum evaluation depth of 6. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-08-05 12:12:26,369 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-08-05 12:12:26,373 INFO L168 Benchmark]: Toolchain (without parser) took 716.58 ms. Allocated memory is still 141.0 MB. Free memory was 106.0 MB in the beginning and 83.6 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2019-08-05 12:12:26,373 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory is still 106.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 12:12:26,375 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.46 ms. Allocated memory is still 141.0 MB. Free memory was 106.0 MB in the beginning and 103.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-08-05 12:12:26,378 INFO L168 Benchmark]: Boogie Preprocessor took 23.93 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 102.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 12:12:26,379 INFO L168 Benchmark]: RCFGBuilder took 400.63 ms. Allocated memory is still 141.0 MB. Free memory was 102.5 MB in the beginning and 91.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-08-05 12:12:26,380 INFO L168 Benchmark]: Abstract Interpretation took 235.49 ms. Allocated memory is still 141.0 MB. Free memory was 91.4 MB in the beginning and 83.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 7.1 GB. [2019-08-05 12:12:26,387 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory is still 106.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 50.46 ms. Allocated memory is still 141.0 MB. Free memory was 106.0 MB in the beginning and 103.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.93 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 102.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.63 ms. Allocated memory is still 141.0 MB. Free memory was 102.5 MB in the beginning and 91.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 235.49 ms. Allocated memory is still 141.0 MB. Free memory was 91.4 MB in the beginning and 83.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 10]: Unable to prove that loop invariant is valid and assertion always holds Unable to prove that loop invariant is valid and assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L20] z := 1; [L2-L3] requires x > 0; [L8] y := 4; [L10] invariant inc_y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant inc_y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant inc_y > 0; - UnprovableResult [Line: 10]: Unable to prove that loop invariant is valid and assertion always holds Unable to prove that loop invariant is valid and assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L2-L3] requires x > 0; [L8] y := 4; [L10] invariant y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant y > 0; - UnprovableResult [Line: 2]: Unable to prove that procedure postcondition always holds and assertion always holds Unable to prove that procedure postcondition always holds and assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L20] z := 1; [L2-L3] requires x > 0; [L8] y := 4; [L10] invariant inc_y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant inc_y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant inc_y > 0; [L9] COND FALSE !(y > 0) - UnprovableResult [Line: 2]: Unable to prove that procedure postcondition always holds Unable to prove that procedure postcondition always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L2-L3] requires x > 0; [L8] y := 4; [L10] invariant y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant y > 0; [L9] COND FALSE !(y > 0) - UnprovableResult [Line: 2]: Unable to prove that procedure postcondition always holds Unable to prove that procedure postcondition always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L2-L3] requires x > 0; [L8] y := 4; [L10] invariant y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant y > 0; [L9] COND TRUE y > 0 [L12] res := res + x; [L13] y := y - 1; [L10] invariant y > 0; [L9] COND FALSE !(y > 0) - PositiveResult [Line: 2]: procedure postcondition always holds and assertion always holds For all program executions holds that procedure postcondition always holds and assertion always holds at this location - PositiveResult [Line: 2]: procedure precondition always holds and assertion always holds For all program executions holds that procedure precondition always holds and assertion always holds at this location RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...