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/toy/tooDifficultLoopInvariant/ArrayInit01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-07 19:05:17,554 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 19:05:17,556 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 19:05:17,574 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-07 19:05:17,575 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-07 19:05:17,576 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-07 19:05:17,578 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-07 19:05:17,581 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-07 19:05:17,585 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-07 19:05:17,586 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-07 19:05:17,593 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-07 19:05:17,594 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-07 19:05:17,598 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-07 19:05:17,601 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-07 19:05:17,602 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-07 19:05:17,603 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-07 19:05:17,606 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-07 19:05:17,611 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-07 19:05:17,614 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-07 19:05:17,617 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-07 19:05:17,619 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-07 19:05:17,620 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-07 19:05:17,624 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-01-07 19:05:17,637 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 19:05:17,658 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 19:05:17,658 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 19:05:17,660 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 19:05:17,660 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 19:05:17,660 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 19:05:17,661 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 19:05:17,661 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 19:05:17,661 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 19:05:17,661 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-07 19:05:17,661 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 19:05:17,662 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-07 19:05:17,662 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-07 19:05:17,663 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 19:05:17,663 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 19:05:17,664 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 19:05:17,664 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 19:05:17,664 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 19:05:17,664 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 19:05:17,664 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 19:05:17,665 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 19:05:17,665 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 19:05:17,665 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 19:05:17,665 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 19:05:17,665 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 19:05:17,666 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 19:05:17,666 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 19:05:17,666 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 19:05:17,666 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 19:05:17,666 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 19:05:17,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 19:05:17,667 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 19:05:17,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 19:05:17,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 19:05:17,668 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 19:05:17,668 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 19:05:17,668 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 19:05:17,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 19:05:17,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 19:05:17,668 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 19:05:17,669 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 19:05:17,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 19:05:17,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 19:05:17,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 19:05:17,731 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 19:05:17,732 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 19:05:17,733 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit01.bpl [2019-01-07 19:05:17,733 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit01.bpl' [2019-01-07 19:05:17,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 19:05:17,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 19:05:17,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 19:05:17,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 19:05:17,777 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 19:05:17,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,811 WARN L165 Inliner]: Program contained no entry procedure! [2019-01-07 19:05:17,811 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-01-07 19:05:17,812 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-01-07 19:05:17,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 19:05:17,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 19:05:17,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 19:05:17,818 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 19:05:17,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (1/1) ... [2019-01-07 19:05:17,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 19:05:17,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 19:05:17,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 19:05:17,848 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 19:05:17,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 07:05:17" (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 19:05:17,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-01-07 19:05:17,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-07 19:05:17,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-07 19:05:18,221 INFO L278 CfgBuilder]: Using library mode [2019-01-07 19:05:18,221 INFO L286 CfgBuilder]: Removed 0 assue(true) statements. [2019-01-07 19:05:18,222 INFO L202 PluginConnector]: Adding new model ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 07:05:18 BoogieIcfgContainer [2019-01-07 19:05:18,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 19:05:18,223 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-01-07 19:05:18,223 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-01-07 19:05:18,224 INFO L276 PluginConnector]: Abstract Interpretation initialized [2019-01-07 19:05:18,225 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "ArrayInit01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 07:05:18" (1/1) ... [2019-01-07 19:05:18,255 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 19:05:22,339 WARN L212 ngHoareTripleChecker]: Soundness check inconclusive for the following hoare triple [2019-01-07 19:05:22,339 WARN L217 ngHoareTripleChecker]: Expected: VALID Actual: UNKNOWN [2019-01-07 19:05:22,340 WARN L219 ngHoareTripleChecker]: Solver was "Z3" in version "4.8.3" [2019-01-07 19:05:22,342 WARN L223 ngHoareTripleChecker]: -- [2019-01-07 19:05:22,342 WARN L224 ngHoareTripleChecker]: Pre: {2147483633#(or (forall ((v_idx_54 Int) (v_idx_53 Int)) (exists ((v_v_91_1 Int) (v_v_94_1 Int)) (and (= c_j 0) (= (select |c_old(a)| v_idx_54) v_v_94_1) (= (select c_a v_idx_53) v_v_91_1) (= (mod c_i 2) 0)))) (forall ((v_idx_52 Int) (v_idx_50 Int) (v_idx_51 Int) (v_idx_49 Int)) (exists ((v_v_1_1 Int) (v_v_2_1 Int) (v_v_4_1 Int)) (and (= (select |c_old(a)| v_idx_49) v_v_1_1) (= c_i 1) (= c_j 0) (not (= c_n 0)) (or (= (select c_a v_idx_50) v_v_2_1) (<= 0 v_idx_50)) (or (= (select c_a v_idx_52) v_v_4_1) (< v_idx_52 1)) (or (= 0 (select c_a v_idx_51)) (< v_idx_51 0) (<= 1 v_idx_51))))))} [2019-01-07 19:05:22,345 WARN L228 ngHoareTripleChecker]: Action: assume i < n;a := a[i := 0];i := i + 1; [2019-01-07 19:05:22,346 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (and (= c_i_primed (+ c_i 1)) (= c_a_primed (store c_a c_i 0)) (< c_i c_n)) [2019-01-07 19:05:22,347 WARN L230 ngHoareTripleChecker]: Post: {2147483632#(forall ((v_idx_58 Int) (v_idx_56 Int) (v_idx_57 Int) (v_idx_55 Int)) (exists ((v_b_14_1 Int) (v_b_15_1 Int) (v_v_138_1 Int) (v_v_94_1 Int) (v_v_136_1 Int)) (and (or (= (select c_a v_idx_56) v_v_136_1) (<= v_b_14_1 v_idx_56)) (or (<= v_b_15_1 v_idx_57) (= (select c_a v_idx_57) 0) (< v_idx_57 v_b_14_1)) (= c_j 0) (or (< v_idx_58 v_b_15_1) (= (select c_a v_idx_58) v_v_138_1)) (= (select |c_old(a)| v_idx_55) v_v_94_1) (not (= v_b_15_1 0)) (not (= c_i 0)) (= (mod v_b_14_1 2) 0))))} [2019-01-07 19:05:22,347 WARN L263 ngHoareTripleChecker]: unsat core / model generation is disabled, enable it to get more details [2019-01-07 19:05:22,349 WARN L268 ngHoareTripleChecker]: -- [2019-01-07 19:05:22,349 WARN L269 ngHoareTripleChecker]: Simplified triple [2019-01-07 19:05:22,629 WARN L181 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2019-01-07 19:05:22,629 WARN L270 ngHoareTripleChecker]: Pre: {2147483633#(or (forall ((v_idx_54 Int) (v_idx_53 Int)) (exists ((v_v_91_1 Int) (v_v_94_1 Int)) (and (= j 0) (= (select |old(a)| v_idx_54) v_v_94_1) (= (select a v_idx_53) v_v_91_1) (= (mod i 2) 0)))) (forall ((v_idx_52 Int) (v_idx_50 Int) (v_idx_51 Int) (v_idx_49 Int)) (exists ((v_v_1_1 Int) (v_v_2_1 Int) (v_v_4_1 Int)) (and (= (select |old(a)| v_idx_49) v_v_1_1) (= i 1) (= j 0) (not (= n 0)) (or (= (select a v_idx_50) v_v_2_1) (<= 0 v_idx_50)) (or (= (select a v_idx_52) v_v_4_1) (< v_idx_52 1)) (or (= 0 (select a v_idx_51)) (< v_idx_51 0) (<= 1 v_idx_51))))))} [2019-01-07 19:05:22,630 WARN L274 ngHoareTripleChecker]: Action: assume i < n;a := a[i := 0];i := i + 1; [2019-01-07 19:05:22,630 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (and (= c_i_primed (+ c_i 1)) (= c_a_primed (store c_a c_i 0)) (< c_i c_n)) [2019-01-07 19:05:22,746 WARN L276 ngHoareTripleChecker]: Post: {2147483632#(and (= j 0) (not (= i 0)))} [2019-01-07 19:05:25,737 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 19:05:25,753 INFO L272 AbstractInterpreter]: Visited 6 different actions 21 times. Merged at 5 different actions 15 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 19:05:25,755 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-01-07 19:05:25,757 INFO L168 Benchmark]: Toolchain (without parser) took 7982.23 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: 211.5 MB). Peak memory consumption was 211.5 MB. Max. memory is 7.1 GB. [2019-01-07 19:05:25,758 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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 19:05:25,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.31 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 19:05:25,760 INFO L168 Benchmark]: Boogie Preprocessor took 30.56 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 19:05:25,761 INFO L168 Benchmark]: RCFGBuilder took 374.68 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 19:05:25,762 INFO L168 Benchmark]: Abstract Interpretation took 7531.96 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: 190.4 MB). Peak memory consumption was 190.4 MB. Max. memory is 7.1 GB. [2019-01-07 19:05:25,766 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 0.22 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 40.31 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 30.56 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 374.68 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 7531.96 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: 190.4 MB). Peak memory consumption was 190.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 34]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L26] i := 0; [L27] assume j == i; [L29] COND FALSE !(i < n) [L33] assume 0 <= r && r < n; [L34] assert a[r] == 0; RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...