java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested9.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:18:00,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:18:00,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:18:00,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:18:00,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:18:00,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:18:00,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:18:00,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:18:00,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:18:00,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:18:00,293 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:18:00,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:18:00,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:18:00,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:18:00,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:18:00,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:18:00,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:18:00,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:18:00,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:18:00,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:18:00,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:18:00,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:18:00,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:18:00,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:18:00,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:18:00,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:18:00,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:18:00,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:18:00,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:18:00,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:18:00,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:18:00,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:18:00,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:18:00,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:18:00,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:18:00,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:18:00,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:18:00,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:18:00,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:18:00,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:18:00,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:18:00,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:18:00,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:18:00,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:18:00,361 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:18:00,362 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:18:00,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested9.i_3.bpl [2019-08-05 10:18:00,363 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested9.i_3.bpl' [2019-08-05 10:18:00,400 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:18:00,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:18:00,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:18:00,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:18:00,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:18:00,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:18:00,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:18:00,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:18:00,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:18:00,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/1) ... [2019-08-05 10:18:00,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:18:00,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:18:00,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:18:00,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:18:00,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (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 [2019-08-05 10:18:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 10:18:00,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 10:18:00,809 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 10:18:00,810 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-08-05 10:18:00,811 INFO L202 PluginConnector]: Adding new model nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:18:00 BoogieIcfgContainer [2019-08-05 10:18:00,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:18:00,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:18:00,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:18:00,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:18:00,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:18:00" (1/2) ... [2019-08-05 10:18:00,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac320cc and model type nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:18:00, skipping insertion in model container [2019-08-05 10:18:00,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:18:00" (2/2) ... [2019-08-05 10:18:00,819 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i_3.bpl [2019-08-05 10:18:00,829 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:18:00,836 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:18:00,853 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:18:00,878 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:18:00,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:18:00,879 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:18:00,879 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:18:00,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:18:00,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:18:00,880 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:18:00,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:18:00,880 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:18:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-08-05 10:18:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:18:00,899 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:18:00,900 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-05 10:18:00,905 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:18:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:18:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2019-08-05 10:18:00,959 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:18:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:18:01,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:18:01,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:18:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:18:01,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:18:01,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 10:18:01,155 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:18:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:18:01,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:18:01,175 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 4 states. [2019-08-05 10:18:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:18:01,356 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-08-05 10:18:01,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:18:01,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-08-05 10:18:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:18:01,373 INFO L225 Difference]: With dead ends: 10 [2019-08-05 10:18:01,374 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 10:18:01,376 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:18:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 10:18:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 10:18:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 10:18:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-05 10:18:01,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-08-05 10:18:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:18:01,411 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-05 10:18:01,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:18:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-05 10:18:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 10:18:01,412 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:18:01,412 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-08-05 10:18:01,413 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:18:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:18:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 141423237, now seen corresponding path program 1 times [2019-08-05 10:18:01,414 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:18:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:18:01,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-05 10:18:01,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:18:01,599 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:18:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:18:01,647 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:18:01,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-08-05 10:18:01,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 10:18:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 10:18:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:18:01,650 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 7 states. [2019-08-05 10:18:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:18:01,942 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-08-05 10:18:01,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-05 10:18:01,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-08-05 10:18:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:18:01,943 INFO L225 Difference]: With dead ends: 12 [2019-08-05 10:18:01,944 INFO L226 Difference]: Without dead ends: 12 [2019-08-05 10:18:01,945 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-08-05 10:18:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-08-05 10:18:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-08-05 10:18:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 10:18:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-08-05 10:18:01,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-08-05 10:18:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:18:01,948 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-08-05 10:18:01,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 10:18:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-08-05 10:18:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-05 10:18:01,949 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:18:01,949 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-08-05 10:18:01,950 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:18:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:18:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2019-08-05 10:18:01,951 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:18:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:18:01,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:18:01,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:18:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:18:02,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:18:02,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:18:02,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:18:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:18:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:18:02,176 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2019-08-05 10:18:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:18:02,385 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-08-05 10:18:02,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:18:02,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-08-05 10:18:02,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:18:02,392 INFO L225 Difference]: With dead ends: 16 [2019-08-05 10:18:02,392 INFO L226 Difference]: Without dead ends: 13 [2019-08-05 10:18:02,393 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-08-05 10:18:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-08-05 10:18:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-08-05 10:18:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 10:18:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-08-05 10:18:02,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-08-05 10:18:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:18:02,396 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-08-05 10:18:02,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:18:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-08-05 10:18:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-05 10:18:02,397 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:18:02,397 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-08-05 10:18:02,398 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:18:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:18:02,399 INFO L82 PathProgramCache]: Analyzing trace with hash -505638469, now seen corresponding path program 2 times [2019-08-05 10:18:02,400 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:18:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:18:02,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:18:02,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:18:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-08-05 10:18:02,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:18:02,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-08-05 10:18:02,571 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 10:18:02,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 10:18:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:18:02,572 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-08-05 10:18:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:18:02,588 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2019-08-05 10:18:02,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 10:18:02,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-08-05 10:18:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:18:02,589 INFO L225 Difference]: With dead ends: 5 [2019-08-05 10:18:02,590 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:18:02,590 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:18:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:18:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:18:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:18:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:18:02,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-08-05 10:18:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:18:02,592 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:18:02,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 10:18:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:18:02,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:18:02,598 INFO L202 PluginConnector]: Adding new model nested9.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:18:02 BoogieIcfgContainer [2019-08-05 10:18:02,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:18:02,601 INFO L168 Benchmark]: Toolchain (without parser) took 2198.16 ms. Allocated memory was 133.2 MB in the beginning and 171.4 MB in the end (delta: 38.3 MB). Free memory was 109.0 MB in the beginning and 122.5 MB in the end (delta: -13.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2019-08-05 10:18:02,602 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:18:02,603 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.24 ms. Allocated memory is still 133.2 MB. Free memory was 109.0 MB in the beginning and 107.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-05 10:18:02,604 INFO L168 Benchmark]: Boogie Preprocessor took 25.25 ms. Allocated memory is still 133.2 MB. Free memory was 107.3 MB in the beginning and 106.4 MB in the end (delta: 872.5 kB). Peak memory consumption was 872.5 kB. Max. memory is 7.1 GB. [2019-08-05 10:18:02,605 INFO L168 Benchmark]: RCFGBuilder took 343.33 ms. Allocated memory is still 133.2 MB. Free memory was 106.4 MB in the beginning and 95.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-08-05 10:18:02,606 INFO L168 Benchmark]: TraceAbstraction took 1785.77 ms. Allocated memory was 133.2 MB in the beginning and 171.4 MB in the end (delta: 38.3 MB). Free memory was 95.4 MB in the beginning and 122.5 MB in the end (delta: -27.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-08-05 10:18:02,610 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.24 ms. Allocated memory is still 133.2 MB. Free memory was 109.0 MB in the beginning and 107.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.25 ms. Allocated memory is still 133.2 MB. Free memory was 107.3 MB in the beginning and 106.4 MB in the end (delta: 872.5 kB). Peak memory consumption was 872.5 kB. Max. memory is 7.1 GB. * RCFGBuilder took 343.33 ms. Allocated memory is still 133.2 MB. Free memory was 106.4 MB in the beginning and 95.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1785.77 ms. Allocated memory was 133.2 MB in the beginning and 171.4 MB in the end (delta: 38.3 MB). Free memory was 95.4 MB in the beginning and 122.5 MB in the end (delta: -27.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 80]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. SAFE Result, 1.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 12 SDslu, 16 SDs, 0 SdLazy, 70 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 4 QuantifiedInterpolants, 1085 SizeOfPredicates, 12 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 12/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...