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-z3.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ff8eab6 [2018-09-26 09:02:59,038 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 09:02:59,040 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 09:02:59,055 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 09:02:59,055 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 09:02:59,057 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 09:02:59,058 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 09:02:59,060 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 09:02:59,061 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 09:02:59,062 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 09:02:59,063 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 09:02:59,063 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 09:02:59,064 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 09:02:59,065 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 09:02:59,066 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 09:02:59,067 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 09:02:59,068 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 09:02:59,070 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 09:02:59,072 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 09:02:59,073 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 09:02:59,074 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 09:02:59,076 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 09:02:59,078 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-26 09:02:59,078 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 09:02:59,079 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 09:02:59,081 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 09:02:59,083 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 09:02:59,087 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 09:02:59,088 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 09:02:59,090 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 09:02:59,090 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 09:02:59,090 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-26 09:02:59,091 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-26 09:02:59,091 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-26 09:02:59,094 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-26 09:02:59,096 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-26 09:02:59,096 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-pdr-z3.epf [2018-09-26 09:02:59,112 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 09:02:59,112 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 09:02:59,114 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 09:02:59,114 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-09-26 09:02:59,114 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 09:02:59,114 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in [2018-09-26 09:02:59,114 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 09:02:59,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 09:02:59,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 09:02:59,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 09:02:59,199 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 09:02:59,199 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 09:02:59,200 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl [2018-09-26 09:02:59,201 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl' [2018-09-26 09:02:59,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 09:02:59,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 09:02:59,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 09:02:59,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 09:02:59,287 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 09:02:59,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 09:02:59,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 09:02:59,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 09:02:59,333 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 09:02:59,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/1) ... [2018-09-26 09:02:59,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 09:02:59,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 09:02:59,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 09:02:59,368 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 09:02:59,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (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 [2018-09-26 09:02:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 09:02:59,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 09:03:00,385 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 09:03:00,385 INFO L202 PluginConnector]: Adding new model pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:03:00 BoogieIcfgContainer [2018-09-26 09:03:00,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 09:03:00,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 09:03:00,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 09:03:00,390 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 09:03:00,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:02:59" (1/2) ... [2018-09-26 09:03:00,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7559cdf7 and model type pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:03:00, skipping insertion in model container [2018-09-26 09:03:00,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:03:00" (2/2) ... [2018-09-26 09:03:00,394 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl [2018-09-26 09:03:00,402 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-09-26 09:03:00,411 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 09:03:00,457 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 09:03:00,458 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 09:03:00,458 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 09:03:00,458 INFO L383 AbstractCegarLoop]: Compute interpolants for PDR [2018-09-26 09:03:00,458 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 09:03:00,459 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 09:03:00,459 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 09:03:00,459 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 09:03:00,459 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 09:03:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 09:03:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 09:03:00,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 09:03:00,484 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 09:03:00,486 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 09:03:00,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 09:03:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash 987398, now seen corresponding path program 1 times No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in [2018-09-26 09:03:00,512 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 09:03:01,138 WARN L178 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-26 09:03:01,339 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-09-26 09:03:01,393 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 09:03:01,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 09:03:01,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 09:03:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 09:03:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 09:03:01,405 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-09-26 09:03:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 09:03:01,492 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-09-26 09:03:01,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 09:03:01,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 09:03:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 09:03:01,509 INFO L225 Difference]: With dead ends: 10 [2018-09-26 09:03:01,509 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 09:03:01,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 09:03:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 09:03:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 09:03:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 09:03:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 09:03:01,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 09:03:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 09:03:01,547 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 09:03:01,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 09:03:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 09:03:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 09:03:01,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 09:03:01,549 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 09:03:01,549 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 09:03:01,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 09:03:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash 948966809, now seen corresponding path program 1 times No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in [2018-09-26 09:03:01,558 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 09:03:01,910 WARN L178 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-09-26 09:03:02,452 WARN L178 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-09-26 09:03:02,661 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-09-26 09:03:03,064 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 109 [2018-09-26 09:03:03,545 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2018-09-26 09:03:04,656 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 219 [2018-09-26 09:03:05,298 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 269 [2018-09-26 09:03:06,039 WARN L178 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2018-09-26 09:03:08,323 WARN L178 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2018-09-26 09:03:11,658 WARN L178 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2018-09-26 09:03:16,566 WARN L178 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 413 [2018-09-26 09:03:21,401 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2018-09-26 09:03:23,546 WARN L178 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 507 [2018-09-26 09:03:34,467 WARN L178 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 511 [2018-09-26 09:03:49,091 WARN L178 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 605 [2018-09-26 09:04:12,115 WARN L178 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 610 DAG size of output: 609 [2018-09-26 09:04:37,162 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 581 [2018-09-26 09:04:41,878 WARN L178 SmtUtils]: Spent 949.00 ms on a formula simplification that was a NOOP. DAG size: 703 [2018-09-26 09:05:21,693 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 586 [2018-09-26 09:05:23,466 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 587 [2018-09-26 09:05:27,809 WARN L178 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 708 DAG size of output: 707 [2018-09-26 09:07:20,398 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 09:07:20,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 09:07:20,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 09:07:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 09:07:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 09:07:20,404 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 09:07:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 09:07:32,759 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-26 09:07:32,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 09:07:32,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 09:07:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 09:07:32,762 INFO L225 Difference]: With dead ends: 7 [2018-09-26 09:07:32,762 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 09:07:32,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1647 GetRequests, 1351 SyntacticMatches, 253 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6209 ImplicationChecksByTransitivity, 247.7s TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 09:07:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 09:07:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 09:07:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 09:07:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 09:07:32,765 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-09-26 09:07:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 09:07:32,765 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 09:07:32,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 09:07:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 09:07:32,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 09:07:32,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 09:07:34,299 WARN L178 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 953 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown