java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-pdr.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 16:09:53,805 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 16:09:53,810 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 16:09:53,830 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 16:09:53,830 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 16:09:53,831 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 16:09:53,832 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 16:09:53,834 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 16:09:53,836 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 16:09:53,837 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 16:09:53,838 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 16:09:53,838 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 16:09:53,839 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 16:09:53,840 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 16:09:53,841 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 16:09:53,842 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 16:09:53,843 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 16:09:53,845 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 16:09:53,847 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 16:09:53,849 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 16:09:53,850 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 16:09:53,851 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 16:09:53,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 16:09:53,853 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 16:09:53,853 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 16:09:53,854 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 16:09:53,855 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 16:09:53,856 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 16:09:53,857 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 16:09:53,858 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 16:09:53,858 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 16:09:53,859 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 16:09:53,859 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 16:09:53,859 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 16:09:53,860 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 16:09:53,861 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 16:09:53,861 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-pdr.epf [2018-07-23 16:09:53,869 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 16:09:53,869 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 16:09:53,870 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 16:09:53,871 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-07-23 16:09:53,871 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 16:09:53,871 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 16:09:53,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 16:09:53,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 16:09:53,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 16:09:53,935 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 16:09:53,936 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 16:09:53,937 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl [2018-07-23 16:09:53,937 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl' [2018-07-23 16:09:54,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 16:09:54,009 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 16:09:54,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 16:09:54,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 16:09:54,010 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 16:09:54,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/1) ... [2018-07-23 16:09:54,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 16:09:54,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 16:09:54,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 16:09:54,095 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 16:09:54,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (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:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-07-23 16:09:54,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 16:09:54,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 16:09:55,088 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 16:09:55,089 INFO L202 PluginConnector]: Adding new model pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 04:09:55 BoogieIcfgContainer [2018-07-23 16:09:55,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 16:09:55,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 16:09:55,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 16:09:55,094 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 16:09:55,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 04:09:53" (1/2) ... [2018-07-23 16:09:55,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765592c and model type pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 04:09:55, skipping insertion in model container [2018-07-23 16:09:55,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 04:09:55" (2/2) ... [2018-07-23 16:09:55,098 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c_13.bpl [2018-07-23 16:09:55,107 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-07-23 16:09:55,116 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 16:09:55,158 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 16:09:55,159 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 16:09:55,160 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 16:09:55,160 INFO L375 AbstractCegarLoop]: Compute interpolants for PDR [2018-07-23 16:09:55,160 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 16:09:55,160 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 16:09:55,160 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 16:09:55,160 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 16:09:55,161 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 16:09:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 16:09:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 16:09:55,183 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:09:55,184 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 16:09:55,184 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:09:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 987398, now seen corresponding path program 1 times [2018-07-23 16:09:55,195 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:09:55,763 WARN L169 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-07-23 16:09:55,949 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 16:09:55,950 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 16:09:55,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 16:09:55,959 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 16:09:55,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 16:09:55,962 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-07-23 16:09:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 16:09:56,042 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-07-23 16:09:56,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 16:09:56,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 16:09:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 16:09:56,056 INFO L225 Difference]: With dead ends: 10 [2018-07-23 16:09:56,056 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 16:09:56,059 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 16:09:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 16:09:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 16:09:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 16:09:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 16:09:56,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 16:09:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 16:09:56,096 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 16:09:56,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 16:09:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 16:09:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 16:09:56,097 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 16:09:56,097 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-23 16:09:56,097 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 16:09:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash 948966809, now seen corresponding path program 1 times [2018-07-23 16:09:56,098 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 16:09:56,991 WARN L169 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-07-23 16:09:57,379 WARN L169 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 114 [2018-07-23 16:09:57,716 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 202 [2018-07-23 16:09:58,123 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2018-07-23 16:09:59,106 WARN L169 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 230 [2018-07-23 16:09:59,794 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 281 [2018-07-23 16:10:00,623 WARN L169 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2018-07-23 16:10:03,016 WARN L169 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 331 [2018-07-23 16:10:05,472 WARN L169 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 361 [2018-07-23 16:10:06,892 WARN L169 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 431 [2018-07-23 16:10:10,661 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2018-07-23 16:10:11,288 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2018-07-23 16:10:12,629 WARN L169 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 435 [2018-07-23 16:10:18,311 WARN L169 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 443 [2018-07-23 16:10:19,645 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 444 [2018-07-23 16:10:21,079 WARN L169 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 535 [2018-07-23 16:10:30,609 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 446 [2018-07-23 16:10:31,763 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 447 [2018-07-23 16:10:34,074 WARN L169 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 538 DAG size of output: 538 [2018-07-23 16:10:48,050 WARN L169 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 523 [2018-07-23 16:10:49,747 WARN L169 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 524 [2018-07-23 16:10:52,077 WARN L169 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 638 [2018-07-23 16:11:16,356 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 527 [2018-07-23 16:11:18,032 WARN L169 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 528 [2018-07-23 16:11:21,568 WARN L169 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 641 DAG size of output: 641 [2018-07-23 16:11:55,415 WARN L169 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 604 [2018-07-23 16:11:58,667 WARN L169 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 605 [2018-07-23 16:12:02,510 WARN L169 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 741 [2018-07-23 16:12:55,552 WARN L169 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 609 [2018-07-23 16:12:57,973 WARN L169 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-07-23 16:13:04,105 WARN L169 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 745 DAG size of output: 745 [2018-07-23 16:14:27,598 WARN L169 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 689 DAG size of output: 686 [2018-07-23 16:14:32,591 WARN L169 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 687 [2018-07-23 16:14:38,041 WARN L169 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 845 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown