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/toy/tooDifficultLoopInvariant/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 14:58:29,897 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 14:58:29,899 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 14:58:29,917 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 14:58:29,918 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 14:58:29,920 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 14:58:29,921 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 14:58:29,924 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 14:58:29,926 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 14:58:29,929 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 14:58:29,931 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 14:58:29,932 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 14:58:29,933 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 14:58:29,934 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 14:58:29,935 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 14:58:29,939 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 14:58:29,942 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 14:58:29,950 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 14:58:29,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 14:58:29,961 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 14:58:29,962 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 14:58:29,963 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 14:58:29,965 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-25 14:58:29,968 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-25 14:58:29,968 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-25 14:58:29,969 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-25 14:58:29,970 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-25 14:58:29,971 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-25 14:58:29,971 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-25 14:58:29,974 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-25 14:58:29,974 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-25 14:58:29,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-25 14:58:29,975 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-25 14:58:29,975 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-25 14:58:29,976 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-25 14:58:29,977 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-25 14:58:29,977 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 14:58:29,985 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 14:58:29,986 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 14:58:29,987 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-25 14:58:29,987 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-25 14:58:29,988 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 14:58:29,988 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-07-25 14:58:29,988 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 14:58:29,988 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 14:58:30,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 14:58:30,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 14:58:30,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 14:58:30,072 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 14:58:30,073 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 14:58:30,074 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-07-25 14:58:30,074 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-07-25 14:58:30,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 14:58:30,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 14:58:30,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 14:58:30,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 14:58:30,139 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 14:58:30,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,182 WARN L165 Inliner]: Program contained no entry procedure! [2018-07-25 14:58:30,183 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-07-25 14:58:30,183 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-07-25 14:58:30,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 14:58:30,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 14:58:30,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 14:58:30,186 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 14:58:30,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 14:58:30,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 14:58:30,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 14:58:30,213 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 14:58:30,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/1) ... [2018-07-25 14:58:30,287 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-07-25 14:58:30,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-25 14:58:30,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-25 14:58:30,398 INFO L270 CfgBuilder]: Using library mode [2018-07-25 14:58:30,399 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 02:58:30 BoogieIcfgContainer [2018-07-25 14:58:30,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 14:58:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 14:58:30,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 14:58:30,404 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 14:58:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.07 02:58:30" (1/2) ... [2018-07-25 14:58:30,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374d38cb and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 02:58:30, skipping insertion in model container [2018-07-25 14:58:30,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.07 02:58:30" (2/2) ... [2018-07-25 14:58:30,410 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-07-25 14:58:30,420 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-07-25 14:58:30,431 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 14:58:30,482 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 14:58:30,483 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 14:58:30,483 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 14:58:30,484 INFO L376 AbstractCegarLoop]: Compute interpolants for PDR [2018-07-25 14:58:30,484 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 14:58:30,484 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 14:58:30,485 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 14:58:30,485 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 14:58:30,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 14:58:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-25 14:58:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-25 14:58:30,514 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 14:58:30,515 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-25 14:58:30,516 INFO L415 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 14:58:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-07-25 14:58:30,529 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 14:58:30,623 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 14:58:30,624 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-25 14:58:30,629 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 14:58:30,635 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 14:58:30,636 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-25 14:58:30,639 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-07-25 14:58:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 14:58:30,683 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2018-07-25 14:58:30,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 14:58:30,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-07-25 14:58:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 14:58:30,696 INFO L225 Difference]: With dead ends: 11 [2018-07-25 14:58:30,696 INFO L226 Difference]: Without dead ends: 5 [2018-07-25 14:58:30,700 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-25 14:58:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-25 14:58:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-25 14:58:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-25 14:58:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-25 14:58:30,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-25 14:58:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 14:58:30,734 INFO L472 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-25 14:58:30,734 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 14:58:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-25 14:58:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-25 14:58:30,735 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 14:58:30,735 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-25 14:58:30,735 INFO L415 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 14:58:30,736 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-07-25 14:58:30,736 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 14:58:58,099 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2018-07-25 14:59:39,609 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 535 [2018-07-25 14:59:42,508 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 542 [2018-07-25 14:59:45,555 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 549 [2018-07-25 14:59:48,632 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 556 [2018-07-25 14:59:51,835 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 563 [2018-07-25 14:59:55,188 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 570 [2018-07-25 14:59:58,616 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 577 [2018-07-25 15:00:02,183 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 584 [2018-07-25 15:00:05,893 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 591 [2018-07-25 15:00:09,651 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 598 [2018-07-25 15:00:13,704 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 605 [2018-07-25 15:00:17,772 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 612 [2018-07-25 15:00:21,937 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 619 [2018-07-25 15:00:26,262 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 626 [2018-07-25 15:00:30,667 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 633 [2018-07-25 15:00:35,244 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 640 [2018-07-25 15:00:39,955 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 647 [2018-07-25 15:00:44,750 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 654 [2018-07-25 15:00:49,714 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 661 [2018-07-25 15:00:54,833 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 668 [2018-07-25 15:01:00,082 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 675 [2018-07-25 15:01:05,523 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 682 [2018-07-25 15:01:11,128 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 689 [2018-07-25 15:01:16,877 WARN L169 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 696 [2018-07-25 15:01:22,877 WARN L169 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 703 [2018-07-25 15:01:29,042 WARN L169 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 710 [2018-07-25 15:01:35,464 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 717 [2018-07-25 15:01:42,466 WARN L169 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 724 [2018-07-25 15:01:49,622 WARN L169 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 731 [2018-07-25 15:01:57,035 WARN L169 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 738 [2018-07-25 15:02:04,511 WARN L169 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 745 [2018-07-25 15:02:12,424 WARN L169 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 752 [2018-07-25 15:02:20,494 WARN L169 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 759 [2018-07-25 15:02:28,916 WARN L169 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 766 [2018-07-25 15:02:37,496 WARN L169 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 773 [2018-07-25 15:02:46,420 WARN L169 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 780 [2018-07-25 15:02:55,623 WARN L169 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 787 [2018-07-25 15:03:04,900 WARN L169 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 794 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown