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_array_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-4-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-07 19:05:58,538 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 19:05:58,540 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 19:05:58,559 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-07 19:05:58,560 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-07 19:05:58,561 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-07 19:05:58,562 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-07 19:05:58,564 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-07 19:05:58,566 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-07 19:05:58,567 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-07 19:05:58,568 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-07 19:05:58,614 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_compound_exp_cong.epf [2019-01-07 19:05:58,633 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 19:05:58,633 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 19:05:58,634 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 19:05:58,634 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 19:05:58,635 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 19:05:58,635 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 19:05:58,635 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 19:05:58,635 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 19:05:58,635 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-07 19:05:58,635 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 19:05:58,636 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-07 19:05:58,636 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-07 19:05:58,636 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 19:05:58,636 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 19:05:58,637 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 19:05:58,637 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 19:05:58,637 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 19:05:58,638 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 19:05:58,638 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 19:05:58,638 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 19:05:58,638 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 19:05:58,638 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 19:05:58,639 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 19:05:58,639 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 19:05:58,639 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 19:05:58,639 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 19:05:58,639 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 19:05:58,639 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 19:05:58,640 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 19:05:58,640 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 19:05:58,640 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 19:05:58,640 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 19:05:58,641 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 19:05:58,641 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 19:05:58,641 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 19:05:58,641 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 19:05:58,641 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 19:05:58,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 19:05:58,642 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 19:05:58,642 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 19:05:58,673 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 19:05:58,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 19:05:58,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 19:05:58,697 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 19:05:58,698 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 19:05:58,699 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-4-limited.bpl [2019-01-07 19:05:58,699 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-4-limited.bpl' [2019-01-07 19:05:58,762 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 19:05:58,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 19:05:58,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 19:05:58,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 19:05:58,765 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 19:05:58,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 19:05:58,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 19:05:58,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 19:05:58,833 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 19:05:58,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (1/1) ... [2019-01-07 19:05:58,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 19:05:58,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 19:05:58,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 19:05:58,860 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 19:05:58,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:58" (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 [2019-01-07 19:05:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-07 19:05:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-07 19:05:59,511 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-07 19:05:59,512 INFO L286 CfgBuilder]: Removed 11 assue(true) statements. [2019-01-07 19:05:59,513 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 07:05:59 BoogieIcfgContainer [2019-01-07 19:05:59,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 19:05:59,515 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-01-07 19:05:59,515 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-01-07 19:05:59,515 INFO L276 PluginConnector]: Abstract Interpretation initialized [2019-01-07 19:05:59,516 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "speedup-poc-dd-4-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 07:05:59" (1/1) ... [2019-01-07 19:05:59,557 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 19:06:02,880 WARN L212 ngHoareTripleChecker]: Soundness check inconclusive for the following hoare triple [2019-01-07 19:06:02,881 WARN L217 ngHoareTripleChecker]: Expected: VALID Actual: UNKNOWN [2019-01-07 19:06:02,882 WARN L219 ngHoareTripleChecker]: Solver was "Z3" in version "4.8.3" [2019-01-07 19:06:02,883 WARN L223 ngHoareTripleChecker]: -- [2019-01-07 19:06:02,883 WARN L224 ngHoareTripleChecker]: Pre: {2147483639#(forall ((v_idx_69 Int) (v_idx_67 Int) (v_idx_68 Int) (v_idx_65 Int) (v_idx_66 Int) (v_idx_63 Int) (v_idx_64 Int) (v_idx_70 Int) (v_idx_71 Int)) (exists ((v_b_31_1 Int) (v_v_36_1 Int) (v_b_23_1 Int) (v_b_22_1 Int) (v_v_56_1 Int) (v_b_30_1 Int) (v_v_44_1 Int) (v_v_42_1 Int) (v_v_54_1 Int) (v_v_2_1 Int) (v_v_4_1 Int)) (and (or (< v_idx_65 v_b_30_1) (<= v_b_31_1 v_idx_65) (= 0 (select |c_#memory_int| v_idx_65))) (= v_v_36_1 (select |c_ULTIMATE.start_malloc_old_#valid| v_idx_67)) (= v_v_4_1 (select |c_old(#memory_int)| v_idx_63)) (or (< v_idx_70 v_b_22_1) (= (select |c_#valid| v_idx_70) 1) (<= v_b_23_1 v_idx_70)) (or (= v_v_56_1 (select |c_#memory_int| v_idx_66)) (< v_idx_66 v_b_31_1)) (or (= (select |c_#memory_int| v_idx_64) v_v_54_1) (<= v_b_30_1 v_idx_64)) (or (= (select |c_#valid| v_idx_69) v_v_42_1) (<= v_b_22_1 v_idx_69)) (or (< v_idx_71 v_b_23_1) (= (select |c_#valid| v_idx_71) v_v_44_1)) (= v_v_2_1 (select |c_old(#valid)| v_idx_68)))))} [2019-01-07 19:06:02,886 WARN L228 ngHoareTripleChecker]: Action: #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; [2019-01-07 19:06:02,887 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (= |c_#memory_int_primed| (store |c_#memory_int| c_ULTIMATE.start_main_p1 (+ (select |c_#memory_int| c_ULTIMATE.start_main_p1) 1))) [2019-01-07 19:06:02,887 WARN L230 ngHoareTripleChecker]: Post: {2147483638#(forall ((v_idx_78 Int) (v_idx_76 Int) (v_idx_77 Int) (v_idx_74 Int) (v_idx_75 Int) (v_idx_72 Int) (v_idx_73 Int)) (exists ((v_b_23_1 Int) (v_v_36_1 Int) (v_b_22_1 Int) (v_v_44_1 Int) (v_v_42_1 Int) (v_v_75_1 Int) (v_v_2_1 Int) (v_v_4_1 Int)) (and (or (= (select |c_#valid| v_idx_76) v_v_42_1) (<= v_b_22_1 v_idx_76)) (or (< v_idx_77 v_b_22_1) (<= v_b_23_1 v_idx_77) (= (select |c_#valid| v_idx_77) 1)) (= v_v_4_1 (select |c_old(#memory_int)| v_idx_72)) (= (select |c_ULTIMATE.start_malloc_old_#valid| v_idx_74) v_v_36_1) (or (< v_idx_78 v_b_23_1) (= (select |c_#valid| v_idx_78) v_v_44_1)) (= (select |c_#memory_int| v_idx_73) v_v_75_1) (= v_v_2_1 (select |c_old(#valid)| v_idx_75)))))} [2019-01-07 19:06:02,888 WARN L263 ngHoareTripleChecker]: unsat core / model generation is disabled, enable it to get more details [2019-01-07 19:06:03,258 WARN L268 ngHoareTripleChecker]: -- [2019-01-07 19:06:03,258 WARN L269 ngHoareTripleChecker]: Simplified triple [2019-01-07 19:06:03,555 WARN L270 ngHoareTripleChecker]: Pre: {2147483639#true} [2019-01-07 19:06:03,555 WARN L274 ngHoareTripleChecker]: Action: #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; [2019-01-07 19:06:03,556 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (= |c_#memory_int_primed| (store |c_#memory_int| c_ULTIMATE.start_main_p1 (+ (select |c_#memory_int| c_ULTIMATE.start_main_p1) 1))) [2019-01-07 19:06:03,641 WARN L276 ngHoareTripleChecker]: Post: {2147483638#true} [2019-01-07 19:06:06,359 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 19:06:06,380 INFO L272 AbstractInterpreter]: Visited 14 different actions 20 times. Merged at 1 different actions 1 times. Never widened. Found 9 fixpoints after 6 different actions. Largest state had 0 variables. [2019-01-07 19:06:06,384 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-01-07 19:06:06,385 INFO L168 Benchmark]: Toolchain (without parser) took 7622.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2019-01-07 19:06:06,388 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 19:06:06,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 19:06:06,390 INFO L168 Benchmark]: Boogie Preprocessor took 27.05 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 19:06:06,392 INFO L168 Benchmark]: RCFGBuilder took 653.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-07 19:06:06,393 INFO L168 Benchmark]: Abstract Interpretation took 6869.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 158.6 MB). Peak memory consumption was 158.6 MB. Max. memory is 7.1 GB. [2019-01-07 19:06:06,398 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 67.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.05 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 653.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 6869.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 158.6 MB). Peak memory consumption was 158.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 43]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L22] assume p1 < p2; [L23] assume p2 < p3; [L24] assume p3 < p4; [L26] #memory_int[p1] := 0; [L27] #memory_int[p2] := 0; [L28] #memory_int[p3] := 0; [L29] #memory_int[p4] := 0; [L43] assert #memory_int[p1] >= 0; - UnprovableResult [Line: 44]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L22] assume p1 < p2; [L23] assume p2 < p3; [L24] assume p3 < p4; [L26] #memory_int[p1] := 0; [L27] #memory_int[p2] := 0; [L28] #memory_int[p3] := 0; [L29] #memory_int[p4] := 0; [L43] assert #memory_int[p1] >= 0; [L44] assert #memory_int[p2] <= 0; - UnprovableResult [Line: 45]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L22] assume p1 < p2; [L23] assume p2 < p3; [L24] assume p3 < p4; [L26] #memory_int[p1] := 0; [L27] #memory_int[p2] := 0; [L28] #memory_int[p3] := 0; [L29] #memory_int[p4] := 0; [L43] assert #memory_int[p1] >= 0; [L44] assert #memory_int[p2] <= 0; [L45] assert #memory_int[p3] >= 0; - UnprovableResult [Line: 46]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L50-L51] modifies #valid; [L50-L52] ensures old(#valid)[ptr] == 0; [L50-L53] ensures #valid == old(#valid)[ptr := 1]; [L22] assume p1 < p2; [L23] assume p2 < p3; [L24] assume p3 < p4; [L26] #memory_int[p1] := 0; [L27] #memory_int[p2] := 0; [L28] #memory_int[p3] := 0; [L29] #memory_int[p4] := 0; [L43] assert #memory_int[p1] >= 0; [L44] assert #memory_int[p2] <= 0; [L45] assert #memory_int[p3] >= 0; [L46] assert #memory_int[p4] <= 0; RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...