java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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-ff8eab6 [2018-09-26 09:39:55,001 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 09:39:55,004 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 09:39:55,016 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 09:39:55,016 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 09:39:55,017 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 09:39:55,019 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 09:39:55,021 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 09:39:55,023 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 09:39:55,024 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 09:39:55,025 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 09:39:55,025 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 09:39:55,026 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 09:39:55,027 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 09:39:55,028 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 09:39:55,029 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 09:39:55,030 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 09:39:55,033 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 09:39:55,036 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 09:39:55,041 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 09:39:55,045 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 09:39:55,050 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 09:39:55,055 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-26 09:39:55,055 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 09:39:55,056 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 09:39:55,057 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 09:39:55,061 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 09:39:55,062 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 09:39:55,063 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 09:39:55,067 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 09:39:55,067 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 09:39:55,068 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-26 09:39:55,073 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-26 09:39:55,073 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-26 09:39:55,075 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-26 09:39:55,078 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-26 09:39:55,079 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-pdr-smtinterpol.epf [2018-09-26 09:39:55,099 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 09:39:55,099 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 09:39:55,102 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 09:39:55,103 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-09-26 09:39:55,103 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 09:39:55,103 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-09-26 09:39:55,104 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-09-26 09:39:55,104 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 09:39:55,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 09:39:55,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 09:39:55,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 09:39:55,227 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 09:39:55,228 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 09:39:55,229 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl [2018-09-26 09:39:55,229 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl' [2018-09-26 09:39:55,278 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 09:39:55,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 09:39:55,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 09:39:55,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 09:39:55,283 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 09:39:55,306 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,320 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 09:39:55,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 09:39:55,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 09:39:55,331 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 09:39:55,344 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,344 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,345 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,346 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,349 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,351 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,353 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 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 09:39:55,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 09:39:55,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 09:39:55,355 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 09:39:55,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:39:55" (1/1) ... [2018-09-26 09:39:55,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 09:39:55,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 09:39:55,631 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 09:39:55,632 INFO L202 PluginConnector]: Adding new model half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:39:55 BoogieIcfgContainer [2018-09-26 09:39:55,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 09:39:55,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 09:39:55,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 09:39:55,638 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 09:39:55,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:39:55" (1/2) ... [2018-09-26 09:39:55,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298c100b and model type half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:39:55, skipping insertion in model container [2018-09-26 09:39:55,641 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 26.09 09:39:55" (2/2) ... [2018-09-26 09:39:55,644 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i_3.bpl [2018-09-26 09:39:55,658 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-09-26 09:39:55,668 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 09:39:55,730 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 09:39:55,731 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 09:39:55,731 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 09:39:55,731 INFO L383 AbstractCegarLoop]: Compute interpolants for PDR [2018-09-26 09:39:55,731 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 09:39:55,732 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 09:39:55,732 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 09:39:55,732 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 09:39:55,733 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 09:39:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 09:39:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 09:39:55,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 09:39:55,764 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 09:39:55,766 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 09:39:55,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 09:39:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 09:39:55,783 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 09:39:56,009 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 09:39:56,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 09:39:56,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 09:39:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 09:39:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 09:39:56,028 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 09:39:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 09:39:56,064 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-09-26 09:39:56,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 09:39:56,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 09:39:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 09:39:56,081 INFO L225 Difference]: With dead ends: 10 [2018-09-26 09:39:56,082 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 09:39:56,086 INFO L605 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 [2018-09-26 09:39:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 09:39:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 09:39:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 09:39:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 09:39:56,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 09:39:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 09:39:56,134 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 09:39:56,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 09:39:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 09:39:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 09:39:56,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 09:39:56,137 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 09:39:56,138 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 09:39:56,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 09:39:56,138 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 09:39:56,138 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 09:39:58,897 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2018-09-26 09:40:07,878 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2018-09-26 09:40:11,138 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2018-09-26 09:40:13,026 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2018-09-26 09:40:14,760 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2018-09-26 09:40:16,624 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2018-09-26 09:40:18,734 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 239 [2018-09-26 09:40:21,018 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 248 [2018-09-26 09:40:23,482 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 258 [2018-09-26 09:40:29,109 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2018-09-26 09:40:32,261 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2018-09-26 09:40:35,598 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2018-09-26 09:40:39,416 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2018-09-26 09:40:44,191 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2018-09-26 09:40:49,167 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2018-09-26 09:40:54,160 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2018-09-26 09:40:59,264 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2018-09-26 09:41:04,898 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2018-09-26 09:41:10,927 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2018-09-26 09:41:17,487 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2018-09-26 09:41:24,442 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 381 [2018-09-26 09:41:31,897 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2018-09-26 09:41:39,991 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 400 [2018-09-26 09:41:48,677 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 410 [2018-09-26 09:41:58,008 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 419 [2018-09-26 09:42:07,958 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 429 [2018-09-26 09:42:18,509 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 438 [2018-09-26 09:42:29,892 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 448 [2018-09-26 09:42:42,005 WARN L178 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 457 [2018-09-26 09:42:54,940 WARN L178 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 467 [2018-09-26 09:43:08,715 WARN L178 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 476 [2018-09-26 09:43:23,742 WARN L178 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2018-09-26 09:43:39,316 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 495 [2018-09-26 09:43:56,268 WARN L178 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 505 [2018-09-26 09:44:14,354 WARN L178 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 514 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown