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.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-e6fd87c [2018-07-25 09:30:41,700 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-25 09:30:41,702 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-25 09:30:41,714 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-25 09:30:41,714 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-25 09:30:41,715 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-25 09:30:41,716 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-25 09:30:41,718 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-25 09:30:41,721 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-25 09:30:41,722 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-25 09:30:41,723 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-25 09:30:41,723 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-25 09:30:41,724 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-25 09:30:41,725 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-25 09:30:41,729 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-25 09:30:41,730 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-25 09:30:41,731 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-25 09:30:41,733 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-25 09:30:41,738 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-25 09:30:41,740 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-25 09:30:41,744 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-25 09:30:41,746 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-25 09:30:41,748 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-25 09:30:41,748 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-25 09:30:41,749 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-25 09:30:41,750 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-25 09:30:41,751 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-25 09:30:41,752 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-25 09:30:41,753 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-25 09:30:41,754 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-25 09:30:41,754 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-25 09:30:41,756 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-25 09:30:41,756 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-25 09:30:41,756 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-25 09:30:41,759 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-25 09:30:41,760 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-25 09:30:41,760 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-pdr.epf [2018-07-25 09:30:41,776 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-25 09:30:41,776 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-25 09:30:41,778 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-25 09:30:41,781 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=PDR [2018-07-25 09:30:41,782 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-25 09:30:41,782 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-25 09:30:41,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-25 09:30:41,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-25 09:30:41,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-25 09:30:41,859 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-25 09:30:41,860 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-25 09:30:41,860 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl [2018-07-25 09:30:41,861 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl' [2018-07-25 09:30:41,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-25 09:30:41,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-07-25 09:30:41,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-25 09:30:41,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-25 09:30:41,965 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-25 09:30:41,988 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,005 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-25 09:30:42,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-25 09:30:42,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-25 09:30:42,015 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-25 09:30:42,027 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,027 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,030 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,038 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,050 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,053 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,061 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 25.07 09:30:41" (1/1) ... [2018-07-25 09:30:42,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-25 09:30:42,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-25 09:30:42,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-25 09:30:42,069 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-25 09:30:42,070 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 25.07 09:30:41" (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 [2018-07-25 09:30:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-25 09:30:42,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-25 09:30:43,042 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-25 09:30:43,043 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 25.07 09:30:43 BoogieIcfgContainer [2018-07-25 09:30:43,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-25 09:30:43,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-25 09:30:43,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-25 09:30:43,048 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-25 09:30:43,048 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 25.07 09:30:41" (1/2) ... [2018-07-25 09:30:43,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436006bb and model type pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.07 09:30:43, skipping insertion in model container [2018-07-25 09:30:43,049 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 25.07 09:30:43" (2/2) ... [2018-07-25 09:30:43,051 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c_13.bpl [2018-07-25 09:30:43,062 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:PDR Determinization: PREDICATE_ABSTRACTION [2018-07-25 09:30:43,072 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-25 09:30:43,121 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-25 09:30:43,122 INFO L374 AbstractCegarLoop]: Interprodecural is true [2018-07-25 09:30:43,122 INFO L375 AbstractCegarLoop]: Hoare is true [2018-07-25 09:30:43,122 INFO L376 AbstractCegarLoop]: Compute interpolants for PDR [2018-07-25 09:30:43,122 INFO L377 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-25 09:30:43,123 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-25 09:30:43,123 INFO L379 AbstractCegarLoop]: Difference is false [2018-07-25 09:30:43,123 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-25 09:30:43,123 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-25 09:30:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-25 09:30:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-25 09:30:43,146 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 09:30:43,147 INFO L354 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-25 09:30:43,148 INFO L415 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 09:30:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash 987398, now seen corresponding path program 1 times [2018-07-25 09:30:43,160 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 09:30:43,625 WARN L169 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-07-25 09:30:43,805 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 09:30:43,805 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-25 09:30:43,810 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 09:30:43,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 09:30:43,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-25 09:30:43,820 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-07-25 09:30:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 09:30:43,897 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-07-25 09:30:43,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 09:30:43,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-25 09:30:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 09:30:43,910 INFO L225 Difference]: With dead ends: 10 [2018-07-25 09:30:43,910 INFO L226 Difference]: Without dead ends: 7 [2018-07-25 09:30:43,914 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-25 09:30:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-25 09:30:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-25 09:30:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-25 09:30:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-25 09:30:43,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-25 09:30:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 09:30:43,948 INFO L472 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-25 09:30:43,949 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 09:30:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-25 09:30:43,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-25 09:30:43,950 INFO L346 BasicCegarLoop]: Found error trace [2018-07-25 09:30:43,950 INFO L354 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-25 09:30:43,950 INFO L415 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-07-25 09:30:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash 948966809, now seen corresponding path program 1 times [2018-07-25 09:30:43,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-25 09:30:44,170 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-07-25 09:30:44,832 WARN L169 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-07-25 09:30:45,304 WARN L169 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 109 [2018-07-25 09:30:45,795 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2018-07-25 09:30:46,746 WARN L169 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 219 [2018-07-25 09:30:47,408 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 269 [2018-07-25 09:30:48,105 WARN L169 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2018-07-25 09:30:50,277 WARN L169 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2018-07-25 09:30:53,419 WARN L169 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 409 [2018-07-25 09:30:58,139 WARN L169 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 413 [2018-07-25 09:31:02,792 WARN L169 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2018-07-25 09:31:04,916 WARN L169 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 507 [2018-07-25 09:31:15,635 WARN L169 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 511 [2018-07-25 09:31:29,819 WARN L169 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 605 [2018-07-25 09:31:52,646 WARN L169 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 610 DAG size of output: 609 [2018-07-25 09:32:17,589 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 581 [2018-07-25 09:32:22,220 WARN L169 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 703 [2018-07-25 09:33:01,196 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 586 [2018-07-25 09:33:02,970 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 587 [2018-07-25 09:33:07,195 WARN L169 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 708 DAG size of output: 707 [2018-07-25 09:34:57,543 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-25 09:34:57,544 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-25 09:34:57,545 INFO L451 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-25 09:34:57,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-25 09:34:57,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2018-07-25 09:34:57,548 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-07-25 09:35:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-25 09:35:09,895 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-07-25 09:35:09,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-25 09:35:09,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-07-25 09:35:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-25 09:35:09,897 INFO L225 Difference]: With dead ends: 7 [2018-07-25 09:35:09,897 INFO L226 Difference]: Without dead ends: 0 [2018-07-25 09:35:09,899 INFO L574 BasicCegarLoop]: 0 DeclaredPredicates, 1647 GetRequests, 1351 SyntacticMatches, 253 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6209 ImplicationChecksByTransitivity, 243.0s TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2018-07-25 09:35:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-25 09:35:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-25 09:35:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-25 09:35:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-25 09:35:09,902 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-07-25 09:35:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-25 09:35:09,902 INFO L472 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-25 09:35:09,902 INFO L473 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-25 09:35:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-25 09:35:09,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-25 09:35:09,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-25 09:35:11,313 WARN L169 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 953 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown