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/recursive/regression/bpl/fibonacci.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:07:32,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:07:32,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:07:32,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:07:32,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:07:32,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:07:32,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:07:32,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:07:32,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:07:32,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:07:32,647 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:07:32,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:07:32,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:07:32,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:07:32,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:07:32,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:07:32,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:07:32,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:07:32,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:07:32,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:07:32,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:07:32,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:07:32,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:07:32,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:07:32,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:07:32,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:07:32,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:07:32,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:07:32,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:07:32,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:07:32,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:07:32,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:07:32,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:07:32,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:07:32,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:07:32,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:07:32,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:07:32,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:07:32,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:07:32,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:07:32,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:07:32,736 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:07:32,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:07:32,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:07:32,752 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:07:32,753 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:07:32,754 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/fibonacci.bpl [2019-08-05 11:07:32,754 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/fibonacci.bpl' [2019-08-05 11:07:32,785 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:07:32,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:07:32,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:32,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:07:32,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:07:32,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,822 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:07:32,822 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:07:32,822 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:07:32,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:32,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:07:32,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:07:32,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:07:32,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/1) ... [2019-08-05 11:07:32,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:07:32,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:07:32,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:07:32,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:07:32,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (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 11:07:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-08-05 11:07:32,924 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-08-05 11:07:33,181 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:07:33,182 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:07:33,183 INFO L202 PluginConnector]: Adding new model fibonacci.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:33 BoogieIcfgContainer [2019-08-05 11:07:33,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:07:33,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:07:33,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:07:33,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:07:33,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:32" (1/2) ... [2019-08-05 11:07:33,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dba300 and model type fibonacci.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:07:33, skipping insertion in model container [2019-08-05 11:07:33,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:33" (2/2) ... [2019-08-05 11:07:33,191 INFO L109 eAbstractionObserver]: Analyzing ICFG fibonacci.bpl [2019-08-05 11:07:33,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:07:33,207 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:07:33,221 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:07:33,242 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:07:33,243 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:07:33,243 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:07:33,244 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:07:33,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:07:33,244 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:07:33,244 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:07:33,244 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:07:33,244 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:07:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-08-05 11:07:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-08-05 11:07:33,264 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:33,265 INFO L399 BasicCegarLoop]: trace histogram [1, 1] [2019-08-05 11:07:33,267 INFO L418 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1038, now seen corresponding path program 1 times [2019-08-05 11:07:33,320 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:33,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 11:07:33,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:33,405 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 11:07:33,408 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:33,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-08-05 11:07:33,413 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:07:33,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:07:33,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:07:33,431 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-08-05 11:07:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:33,502 INFO L93 Difference]: Finished difference Result 9 states and 12 transitions. [2019-08-05 11:07:33,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:07:33,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-08-05 11:07:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:33,522 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:07:33,522 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:07:33,524 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:07:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:07:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:07:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:07:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2019-08-05 11:07:33,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 2 [2019-08-05 11:07:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:33,597 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2019-08-05 11:07:33,598 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:07:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2019-08-05 11:07:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-05 11:07:33,605 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:33,606 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:07:33,606 INFO L418 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash 115886195, now seen corresponding path program 1 times [2019-08-05 11:07:33,608 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:33,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:07:33,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:33,866 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2019-08-05 11:07:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-08-05 11:07:34,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:34,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-08-05 11:07:34,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:07:34,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:07:34,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:07:34,030 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 5 states. [2019-08-05 11:07:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:34,154 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2019-08-05 11:07:34,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:07:34,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-08-05 11:07:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:34,158 INFO L225 Difference]: With dead ends: 13 [2019-08-05 11:07:34,158 INFO L226 Difference]: Without dead ends: 13 [2019-08-05 11:07:34,159 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:07:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-08-05 11:07:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-08-05 11:07:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-08-05 11:07:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-08-05 11:07:34,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 12 [2019-08-05 11:07:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:34,167 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-08-05 11:07:34,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:07:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-08-05 11:07:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-08-05 11:07:34,168 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:34,168 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:07:34,169 INFO L418 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:34,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1592598856, now seen corresponding path program 1 times [2019-08-05 11:07:34,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:34,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 11:07:34,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-08-05 11:07:34,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:07:34,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 11:07:34,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 11:07:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 11:07:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:07:34,298 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 6 states. [2019-08-05 11:07:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:34,420 INFO L93 Difference]: Finished difference Result 12 states and 16 transitions. [2019-08-05 11:07:34,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 11:07:34,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-08-05 11:07:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:34,421 INFO L225 Difference]: With dead ends: 12 [2019-08-05 11:07:34,421 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:07:34,422 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:07:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:07:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:07:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:07:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:07:34,423 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-08-05 11:07:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:34,423 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:07:34,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 11:07:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:07:34,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:07:34,429 INFO L202 PluginConnector]: Adding new model fibonacci.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:07:34 BoogieIcfgContainer [2019-08-05 11:07:34,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:07:34,432 INFO L168 Benchmark]: Toolchain (without parser) took 1644.88 ms. Allocated memory was 134.2 MB in the beginning and 170.4 MB in the end (delta: 36.2 MB). Free memory was 110.7 MB in the beginning and 144.7 MB in the end (delta: -34.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:34,433 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 134.2 MB. Free memory was 111.7 MB in the beginning and 111.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:34,434 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.90 ms. Allocated memory is still 134.2 MB. Free memory was 110.5 MB in the beginning and 108.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:34,435 INFO L168 Benchmark]: Boogie Preprocessor took 24.71 ms. Allocated memory is still 134.2 MB. Free memory was 108.5 MB in the beginning and 107.6 MB in the end (delta: 900.6 kB). Peak memory consumption was 900.6 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:34,436 INFO L168 Benchmark]: RCFGBuilder took 333.10 ms. Allocated memory is still 134.2 MB. Free memory was 107.4 MB in the beginning and 98.7 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:34,437 INFO L168 Benchmark]: TraceAbstraction took 1245.03 ms. Allocated memory was 134.2 MB in the beginning and 170.4 MB in the end (delta: 36.2 MB). Free memory was 98.5 MB in the beginning and 144.7 MB in the end (delta: -46.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:07:34,442 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 0.21 ms. Allocated memory is still 134.2 MB. Free memory was 111.7 MB in the beginning and 111.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.90 ms. Allocated memory is still 134.2 MB. Free memory was 110.5 MB in the beginning and 108.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.71 ms. Allocated memory is still 134.2 MB. Free memory was 108.5 MB in the beginning and 107.6 MB in the end (delta: 900.6 kB). Peak memory consumption was 900.6 kB. Max. memory is 7.1 GB. * RCFGBuilder took 333.10 ms. Allocated memory is still 134.2 MB. Free memory was 107.4 MB in the beginning and 98.7 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1245.03 ms. Allocated memory was 134.2 MB in the beginning and 170.4 MB in the end (delta: 36.2 MB). Free memory was 98.5 MB in the beginning and 144.7 MB in the end (delta: -46.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: procedure postcondition always holds For all program executions holds that procedure postcondition 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, 1.1s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 11 SDslu, 33 SDs, 0 SdLazy, 40 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=2, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 627 SizeOfPredicates, 3 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 13/15 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...