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/cookify/bpl false.bpl' -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 12:20:25,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 12:20:25,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 12:20:25,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 12:20:25,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 12:20:25,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 12:20:25,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 12:20:25,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 12:20:25,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 12:20:25,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 12:20:25,835 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 12:20:25,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-08-05 12:20:25,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 12:20:25,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 12:20:25,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 12:20:25,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 12:20:25,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 12:20:25,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 12:20:25,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 12:20:25,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-08-05 12:20:25,888 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 12:20:25,907 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-05 12:20:25,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-05 12:20:25,910 INFO L136 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-08-05 12:20:25,910 INFO L138 SettingsManager]: * Show backtranslation warnings=false [2019-08-05 12:20:25,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-08-05 12:20:25,911 INFO L138 SettingsManager]: * User list type=DISABLED [2019-08-05 12:20:25,911 INFO L138 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-08-05 12:20:25,911 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-08-05 12:20:25,912 INFO L138 SettingsManager]: * Explicit value domain=true [2019-08-05 12:20:25,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-08-05 12:20:25,912 INFO L138 SettingsManager]: * Octagon Domain=false [2019-08-05 12:20:25,912 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-08-05 12:20:25,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-08-05 12:20:25,913 INFO L138 SettingsManager]: * Interval Domain=false [2019-08-05 12:20:25,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-05 12:20:25,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-05 12:20:25,916 INFO L138 SettingsManager]: * Use SBE=true [2019-08-05 12:20:25,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-05 12:20:25,917 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-05 12:20:25,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-05 12:20:25,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-05 12:20:25,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-05 12:20:25,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-05 12:20:25,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-05 12:20:25,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-05 12:20:25,918 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-05 12:20:25,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-05 12:20:25,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-05 12:20:25,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-05 12:20:25,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-05 12:20:25,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-05 12:20:25,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-05 12:20:25,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-05 12:20:25,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-05 12:20:25,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-05 12:20:25,921 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-08-05 12:20:25,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-05 12:20:25,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-05 12:20:25,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-05 12:20:25,922 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-08-05 12:20:25,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 12:20:25,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 12:20:25,977 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 12:20:25,979 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 12:20:25,979 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 12:20:25,980 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/cookify/bpl false.bpl [2019-08-05 12:20:25,980 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/cookify/bpl false.bpl' [2019-08-05 12:20:26,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 12:20:26,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 12:20:26,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 12:20:26,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 12:20:26,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 12:20:26,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,076 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 12:20:26,076 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 12:20:26,076 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 12:20:26,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 12:20:26,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 12:20:26,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 12:20:26,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 12:20:26,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (1/1) ... [2019-08-05 12:20:26,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 12:20:26,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 12:20:26,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 12:20:26,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 12:20:26,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bpl false.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 12:20:26" (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 12:20:26,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTL given in one single declaration [2019-08-05 12:20:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure encTL [2019-08-05 12:20:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure encTL [2019-08-05 12:20:26,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLR given in one single declaration [2019-08-05 12:20:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure encTLR [2019-08-05 12:20:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLR [2019-08-05 12:20:26,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encT given in one single declaration [2019-08-05 12:20:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure encT [2019-08-05 12:20:26,430 INFO L138 BoogieDeclarations]: Found implementation of procedure encT [2019-08-05 12:20:26,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLRR given in one single declaration [2019-08-05 12:20:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure encTLRR [2019-08-05 12:20:26,431 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLRR [2019-08-05 12:20:26,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLRRR given in one single declaration [2019-08-05 12:20:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure encTLRRR [2019-08-05 12:20:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLRRR [2019-08-05 12:20:26,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLRL given in one single declaration [2019-08-05 12:20:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure encTLRL [2019-08-05 12:20:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLRL [2019-08-05 12:20:26,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLRRRL given in one single declaration [2019-08-05 12:20:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure encTLRRRL [2019-08-05 12:20:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLRRRL [2019-08-05 12:20:26,438 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 12:20:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 12:20:26,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 12:20:26,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLRRL given in one single declaration [2019-08-05 12:20:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure encTLRRL [2019-08-05 12:20:26,439 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLRRL [2019-08-05 12:20:26,439 INFO L124 BoogieDeclarations]: Specification and implementation of procedure encTLL given in one single declaration [2019-08-05 12:20:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure encTLL [2019-08-05 12:20:26,440 INFO L138 BoogieDeclarations]: Found implementation of procedure encTLL [2019-08-05 12:20:32,363 INFO L275 CfgBuilder]: Using library mode [2019-08-05 12:20:32,363 INFO L283 CfgBuilder]: Removed 714 assume(true) statements. [2019-08-05 12:20:32,365 INFO L202 PluginConnector]: Adding new model bpl false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 12:20:32 BoogieIcfgContainer [2019-08-05 12:20:32,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 12:20:32,366 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-08-05 12:20:32,366 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-08-05 12:20:32,366 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-08-05 12:20:32,367 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "bpl false.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 12:20:32" (1/1) ... [2019-08-05 12:20:32,413 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-08-05 12:20:33,441 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-08-05 12:20:33,469 INFO L272 AbstractInterpreter]: Visited 902 different actions 1925 times. Merged at 402 different actions 700 times. Widened at 4 different actions 4 times. Performed 11330 root evaluator evaluations with a maximum evaluation depth of 3. Performed 11330 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 428 fixpoints after 201 different actions. Largest state had 0 variables. [2019-08-05 12:20:33,469 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-08-05 12:20:33,473 INFO L168 Benchmark]: Toolchain (without parser) took 7433.16 ms. Allocated memory was 134.2 MB in the beginning and 235.4 MB in the end (delta: 101.2 MB). Free memory was 107.7 MB in the beginning and 105.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 103.2 MB. Max. memory is 7.1 GB. [2019-08-05 12:20:33,474 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 134.2 MB. Free memory is still 109.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 12:20:33,475 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.33 ms. Allocated memory is still 134.2 MB. Free memory was 107.7 MB in the beginning and 94.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2019-08-05 12:20:33,476 INFO L168 Benchmark]: Boogie Preprocessor took 151.32 ms. Allocated memory is still 134.2 MB. Free memory was 94.2 MB in the beginning and 86.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 7.1 GB. [2019-08-05 12:20:33,477 INFO L168 Benchmark]: RCFGBuilder took 6009.54 ms. Allocated memory was 134.2 MB in the beginning and 235.9 MB in the end (delta: 101.7 MB). Free memory was 86.2 MB in the beginning and 104.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. [2019-08-05 12:20:33,478 INFO L168 Benchmark]: Abstract Interpretation took 1103.32 ms. Allocated memory was 235.9 MB in the beginning and 235.4 MB in the end (delta: -524.3 kB). Free memory was 104.1 MB in the beginning and 105.7 MB in the end (delta: -1.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 12:20:33,484 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 0.18 ms. Allocated memory is still 134.2 MB. Free memory is still 109.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 165.33 ms. Allocated memory is still 134.2 MB. Free memory was 107.7 MB in the beginning and 94.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.32 ms. Allocated memory is still 134.2 MB. Free memory was 94.2 MB in the beginning and 86.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6009.54 ms. Allocated memory was 134.2 MB in the beginning and 235.9 MB in the end (delta: 101.7 MB). Free memory was 86.2 MB in the beginning and 104.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 1103.32 ms. Allocated memory was 235.9 MB in the beginning and 235.4 MB in the end (delta: -524.3 kB). Free memory was 104.1 MB in the beginning and 105.7 MB in the end (delta: -1.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 7]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L4] havoc warn, mad, t, tn; [L5] pp := 0; [L14] warn := awarn; [L15] mad := amad; [L16] t := at; [L17] tn := atn; [L18] COND FALSE !(pp == 4) [L19] COND FALSE !(pp == 5) [L20] COND FALSE !(pp == 7) [L21] COND FALSE !(pp == 8) [L23] havoc tn; [L24] t := tn - 10; [L27] assume t > 13; [L28] warn := true; [L75] ret := !warn; [L66] COND FALSE !(ret) [L82] warn := awarn; [L83] mad := amad; [L84] t := at; [L85] tn := atn; [L86] COND TRUE pp == 3 [L137] ret := warn; [L100] COND FALSE !(!ret) [L104] mad := true; [L137] ret := warn; [L108] COND FALSE !(!ret) [L91] havoc tn; [L92] t := tn - 10; [L114] assume t <= 13; [L115] warn := false; [L137] ret := warn; [L119] COND TRUE !ret [L157] warn := awarn; [L158] mad := amad; [L159] t := at; [L160] tn := atn; [L161] COND FALSE !(pp == 3) [L162] COND FALSE !(pp == 4) [L163] COND TRUE pp == 7 [L207] ret := mad; [L192] COND FALSE !(!ret) [L195] mad := false; [L207] ret := mad; [L199] COND TRUE !ret [L200] ret := false; [L32] COND TRUE !ret [L33] ret := false; [L7] assert ret != false; RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...