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/abstractInterpretation/regression/non_con/recursive-easy-1.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:13:52,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:13:52,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:13:52,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:13:52,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:13:52,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:13:52,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:13:52,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:13:52,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:13:52,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:13:52,225 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:13:52,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:13:52,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:13:52,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:13:52,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:13:52,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:13:52,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:13:52,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:13:52,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:13:52,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:13:52,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:13:52,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:13:52,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:13:52,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:13:52,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:13:52,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:13:52,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:13:52,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:13:52,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:13:52,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:13:52,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:13:52,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:13:52,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:13:52,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:13:52,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:13:52,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:13:52,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:13:52,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:13:52,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:13:52,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:13:52,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:13:52,290 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:13:52,302 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:13:52,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:13:52,307 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:13:52,308 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:13:52,309 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/abstractInterpretation/regression/non_con/recursive-easy-1.bpl [2019-08-05 11:13:52,309 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/abstractInterpretation/regression/non_con/recursive-easy-1.bpl' [2019-08-05 11:13:52,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:13:52,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:13:52,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:13:52,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:13:52,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:13:52,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:13:52,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:13:52,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:13:52,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:13:52,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/1) ... [2019-08-05 11:13:52,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:13:52,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:13:52,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:13:52,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:13:52,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (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 11:13:52,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure subToZero given in one single declaration [2019-08-05 11:13:52,474 INFO L130 BoogieDeclarations]: Found specification of procedure subToZero [2019-08-05 11:13:52,474 INFO L138 BoogieDeclarations]: Found implementation of procedure subToZero [2019-08-05 11:13:52,474 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 11:13:52,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 11:13:52,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 11:13:52,791 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 11:13:52,791 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:13:52,792 INFO L202 PluginConnector]: Adding new model recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:13:52 BoogieIcfgContainer [2019-08-05 11:13:52,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:13:52,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:13:52,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:13:52,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:13:52,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:52" (1/2) ... [2019-08-05 11:13:52,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c275fc and model type recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:13:52, skipping insertion in model container [2019-08-05 11:13:52,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:13:52" (2/2) ... [2019-08-05 11:13:52,801 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive-easy-1.bpl [2019-08-05 11:13:52,811 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:13:52,820 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:13:52,835 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:13:52,858 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:13:52,858 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:13:52,859 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:13:52,859 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:13:52,859 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:13:52,859 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:13:52,859 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:13:52,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:13:52,860 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:13:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-08-05 11:13:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 11:13:52,882 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:13:52,883 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-08-05 11:13:52,886 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:13:52,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:13:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash 46873409, now seen corresponding path program 1 times [2019-08-05 11:13:52,938 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:13:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:13:52,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:13:52,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:13:53,125 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 11:13:53,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:13:53,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:13:53,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:13:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:13:53,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:13:53,149 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-08-05 11:13:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:13:53,207 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-08-05 11:13:53,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:13:53,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-08-05 11:13:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:13:53,221 INFO L225 Difference]: With dead ends: 10 [2019-08-05 11:13:53,222 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:13:53,224 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 11:13:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:13:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:13:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:13:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-05 11:13:53,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-08-05 11:13:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:13:53,283 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-05 11:13:53,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:13:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-05 11:13:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-08-05 11:13:53,286 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:13:53,286 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:13:53,286 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:13:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:13:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1885005258, now seen corresponding path program 1 times [2019-08-05 11:13:53,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:13:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:13:53,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 11:13:53,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:13:53,443 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:13:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-05 11:13:53,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:13:53,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 11:13:53,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:13:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:13:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:13:53,611 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-08-05 11:13:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:13:53,657 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-08-05 11:13:53,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:13:53,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-08-05 11:13:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:13:53,662 INFO L225 Difference]: With dead ends: 11 [2019-08-05 11:13:53,662 INFO L226 Difference]: Without dead ends: 11 [2019-08-05 11:13:53,664 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:13:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-05 11:13:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-08-05 11:13:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 11:13:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-08-05 11:13:53,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-08-05 11:13:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:13:53,671 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-08-05 11:13:53,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:13:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-08-05 11:13:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-08-05 11:13:53,672 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:13:53,673 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2019-08-05 11:13:53,673 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:13:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:13:53,674 INFO L82 PathProgramCache]: Analyzing trace with hash 951530131, now seen corresponding path program 2 times [2019-08-05 11:13:53,675 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:13:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:13:53,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 11:13:53,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:13:53,780 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:13:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-08-05 11:13:53,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:13:53,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 11:13:53,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 11:13:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 11:13:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:13:53,857 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2019-08-05 11:13:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:13:54,212 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-08-05 11:13:54,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 11:13:54,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-08-05 11:13:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:13:54,215 INFO L225 Difference]: With dead ends: 13 [2019-08-05 11:13:54,215 INFO L226 Difference]: Without dead ends: 13 [2019-08-05 11:13:54,216 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-08-05 11:13:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-08-05 11:13:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-08-05 11:13:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 11:13:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-08-05 11:13:54,224 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 13 [2019-08-05 11:13:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:13:54,225 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-08-05 11:13:54,226 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 11:13:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-08-05 11:13:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-08-05 11:13:54,227 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:13:54,227 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1] [2019-08-05 11:13:54,227 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:13:54,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:13:54,228 INFO L82 PathProgramCache]: Analyzing trace with hash -692301412, now seen corresponding path program 3 times [2019-08-05 11:13:54,230 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:13:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:13:54,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-08-05 11:13:54,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:13:54,373 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:13:54,374 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:13:54,377 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 11:13:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-08-05 11:13:54,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:13:54,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 11:13:54,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 11:13:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 11:13:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:13:54,464 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-08-05 11:13:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:13:54,542 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-08-05 11:13:54,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 11:13:54,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-08-05 11:13:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:13:54,543 INFO L225 Difference]: With dead ends: 13 [2019-08-05 11:13:54,543 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:13:54,544 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:13:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:13:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:13:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:13:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:13:54,545 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-08-05 11:13:54,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:13:54,545 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:13:54,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 11:13:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:13:54,546 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:13:54,552 INFO L202 PluginConnector]: Adding new model recursive-easy-1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:13:54 BoogieIcfgContainer [2019-08-05 11:13:54,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:13:54,555 INFO L168 Benchmark]: Toolchain (without parser) took 2210.82 ms. Allocated memory was 133.7 MB in the beginning and 169.9 MB in the end (delta: 36.2 MB). Free memory was 108.9 MB in the beginning and 123.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:13:54,556 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 133.7 MB. Free memory was 110.1 MB in the beginning and 109.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 11:13:54,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.58 ms. Allocated memory is still 133.7 MB. Free memory was 108.9 MB in the beginning and 107.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:13:54,558 INFO L168 Benchmark]: Boogie Preprocessor took 20.46 ms. Allocated memory is still 133.7 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:13:54,559 INFO L168 Benchmark]: RCFGBuilder took 394.41 ms. Allocated memory is still 133.7 MB. Free memory was 106.0 MB in the beginning and 95.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-08-05 11:13:54,560 INFO L168 Benchmark]: TraceAbstraction took 1757.80 ms. Allocated memory was 133.7 MB in the beginning and 169.9 MB in the end (delta: 36.2 MB). Free memory was 95.7 MB in the beginning and 123.0 MB in the end (delta: -27.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-08-05 11:13:54,565 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 0.24 ms. Allocated memory is still 133.7 MB. Free memory was 110.1 MB in the beginning and 109.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 33.58 ms. Allocated memory is still 133.7 MB. Free memory was 108.9 MB in the beginning and 107.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.46 ms. Allocated memory is still 133.7 MB. Free memory was 107.1 MB in the beginning and 106.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.41 ms. Allocated memory is still 133.7 MB. Free memory was 106.0 MB in the beginning and 95.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1757.80 ms. Allocated memory was 133.7 MB in the beginning and 169.9 MB in the end (delta: 36.2 MB). Free memory was 95.7 MB in the beginning and 123.0 MB in the end (delta: -27.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 2 procedures, 8 locations, 1 error locations. SAFE Result, 1.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 6 SDslu, 22 SDs, 0 SdLazy, 48 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2456 SizeOfPredicates, 3 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 20/34 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...