java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/Pdr/AutomizerBpl-pdr-smtinterpol.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 14:47:30,357 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 14:47:30,360 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 14:47:30,372 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 14:47:30,373 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 14:47:30,374 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 14:47:30,375 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 14:47:30,377 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 14:47:30,378 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 14:47:30,379 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 14:47:30,380 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 14:47:30,381 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 14:47:30,382 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 14:47:30,383 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 14:47:30,384 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 14:47:30,385 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 14:47:30,386 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 14:47:30,388 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 14:47:30,390 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 14:47:30,392 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 14:47:30,393 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 14:47:30,394 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 14:47:30,397 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-25 14:47:30,397 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-25 14:47:30,398 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-25 14:47:30,399 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-25 14:47:30,400 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-25 14:47:30,401 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-25 14:47:30,402 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-25 14:47:30,403 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-25 14:47:30,403 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-25 14:47:30,404 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-25 14:47:30,404 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-25 14:47:30,405 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-25 14:47:30,406 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-25 14:47:30,406 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-25 14:47:30,407 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-pdr-smtinterpol.epf [2018-07-25 14:47:30,415 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 14:47:30,415 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 14:47:30,417 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 14:47:30,417 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 14:47:30,417 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 14:47:30,417 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-07-25 14:47:30,418 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 14:47:30,418 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 14:47:30,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 14:47:30,480 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 14:47:30,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 14:47:30,486 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 14:47:30,486 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 14:47:30,487 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl [2018-07-25 14:47:30,488 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl' [2018-07-25 14:47:30,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 14:47:30,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 14:47:30,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 14:47:30,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 14:47:30,543 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 14:47:30,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 14:47:30,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 14:47:30,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 14:47:30,586 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 14:47:30,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 14:47:30,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 14:47:30,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 14:47:30,610 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 14:47:30,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/1) ... [2018-07-25 14:47:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-25 14:47:30,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-25 14:47:30,857 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-25 14:47:30,858 INFO L202 PluginConnector]: Adding new model half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 02:47:30 BoogieIcfgContainer [2018-07-25 14:47:30,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 14:47:30,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 14:47:30,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 14:47:30,864 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 14:47:30,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:47:30" (1/2) ... [2018-07-25 14:47:30,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b77a43 and model type half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 02:47:30, skipping insertion in model container [2018-07-25 14:47:30,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 02:47:30" (2/2) ... [2018-07-25 14:47:30,869 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i_3.bpl [2018-07-25 14:47:30,880 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-07-25 14:47:30,889 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 14:47:30,943 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 14:47:30,944 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 14:47:30,944 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 14:47:30,944 INFO L376 AbstractCegarLoop]: Compute interpolants for PDR [2018-07-25 14:47:30,945 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 14:47:30,945 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 14:47:30,945 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 14:47:30,946 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 14:47:30,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 14:47:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-25 14:47:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-25 14:47:30,972 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 14:47:30,973 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-25 14:47:30,975 INFO L415 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 14:47:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-07-25 14:47:30,989 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 14:47:31,198 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 14:47:31,198 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-25 14:47:31,204 INFO L451 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-25 14:47:31,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-25 14:47:31,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-25 14:47:31,214 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-07-25 14:47:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 14:47:31,246 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-07-25 14:47:31,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-25 14:47:31,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-07-25 14:47:31,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 14:47:31,262 INFO L225 Difference]: With dead ends: 10 [2018-07-25 14:47:31,262 INFO L226 Difference]: Without dead ends: 7 [2018-07-25 14:47:31,266 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-25 14:47:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-25 14:47:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-25 14:47:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-25 14:47:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-25 14:47:31,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-25 14:47:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 14:47:31,308 INFO L472 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-25 14:47:31,308 INFO L473 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-25 14:47:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-25 14:47:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-25 14:47:31,309 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 14:47:31,309 INFO L354 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-25 14:47:31,309 INFO L415 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 14:47:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-07-25 14:47:31,310 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 14:47:38,732 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2018-07-25 14:47:40,114 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2018-07-25 14:47:47,841 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2018-07-25 14:47:49,456 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2018-07-25 14:47:51,300 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2018-07-25 14:47:53,436 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2018-07-25 14:47:57,795 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2018-07-25 14:48:00,572 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 267 [2018-07-25 14:48:03,343 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2018-07-25 14:48:06,662 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2018-07-25 14:48:10,166 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2018-07-25 14:48:14,011 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2018-07-25 14:48:18,146 WARN L169 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2018-07-25 14:48:22,870 WARN L169 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2018-07-25 14:48:27,717 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2018-07-25 14:48:32,930 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2018-07-25 14:48:38,579 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2018-07-25 14:48:44,574 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2018-07-25 14:48:51,157 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2018-07-25 14:48:58,093 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 381 [2018-07-25 14:49:05,646 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2018-07-25 14:49:13,778 WARN L169 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2018-07-25 14:49:22,438 WARN L169 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 410 [2018-07-25 14:49:31,754 WARN L169 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 419 [2018-07-25 14:49:41,795 WARN L169 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 429 [2018-07-25 14:49:52,458 WARN L169 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 438 [2018-07-25 14:50:04,003 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 448 [2018-07-25 14:50:16,128 WARN L169 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 457 [2018-07-25 14:50:29,089 WARN L169 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 467 [2018-07-25 14:50:43,077 WARN L169 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 476 [2018-07-25 14:50:57,759 WARN L169 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2018-07-25 14:51:13,657 WARN L169 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 495 [2018-07-25 14:51:30,410 WARN L169 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 505 [2018-07-25 14:51:47,913 WARN L169 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 514 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown