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/n.c11.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:21:05,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:21:05,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:21:05,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:21:05,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:21:05,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:21:05,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:21:05,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:21:05,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:21:05,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:21:05,501 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:21:05,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:21:05,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:21:05,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:21:05,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:21:05,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:21:05,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:21:05,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:21:05,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:21:05,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:21:05,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:21:05,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:21:05,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:21:05,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:21:05,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:21:05,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:21:05,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:21:05,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:21:05,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:21:05,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:21:05,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:21:05,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:21:05,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:21:05,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:21:05,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:21:05,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:21:05,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:21:05,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:21:05,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:21:05,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:21:05,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:21:05,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:21:05,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:21:05,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:21:05,576 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:21:05,576 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:21:05,577 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl [2019-08-05 10:21:05,578 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl' [2019-08-05 10:21:05,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:21:05,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:21:05,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:21:05,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:21:05,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:21:05,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:21:05,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:21:05,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:21:05,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:21:05,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/1) ... [2019-08-05 10:21:05,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:21:05,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:21:05,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:21:05,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:21:05,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (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 10:21:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 10:21:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 10:21:05,935 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 10:21:05,936 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-05 10:21:05,937 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:21:05 BoogieIcfgContainer [2019-08-05 10:21:05,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:21:05,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:21:05,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:21:05,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:21:05,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:21:05" (1/2) ... [2019-08-05 10:21:05,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e1745 and model type n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:21:05, skipping insertion in model container [2019-08-05 10:21:05,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:21:05" (2/2) ... [2019-08-05 10:21:05,950 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.i_3.bpl [2019-08-05 10:21:05,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:21:05,969 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:21:05,986 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:21:06,016 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:21:06,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:21:06,017 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:21:06,017 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:21:06,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:21:06,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:21:06,017 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:21:06,018 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:21:06,018 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:21:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 10:21:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 10:21:06,049 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:21:06,050 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 10:21:06,052 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:21:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:21:06,058 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2019-08-05 10:21:06,107 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:21:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:21:06,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:21:06,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:21:06,208 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 10:21:06,211 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:21:06,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 10:21:06,216 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:21:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:21:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:21:06,234 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 10:21:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:21:06,277 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-05 10:21:06,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:21:06,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 10:21:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:21:06,294 INFO L225 Difference]: With dead ends: 5 [2019-08-05 10:21:06,295 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 10:21:06,297 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:21:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 10:21:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 10:21:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 10:21:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 10:21:06,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 10:21:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:21:06,329 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 10:21:06,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:21:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 10:21:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:21:06,330 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:21:06,330 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:21:06,330 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:21:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:21:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2019-08-05 10:21:06,332 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:21:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:21:06,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-05 10:21:06,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:21:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:21:06,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:21:06,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:21:06,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:21:06,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:21:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:21:06,506 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 10:21:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:21:06,665 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:21:06,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:21:06,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:21:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:21:06,666 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:21:06,667 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 10:21:06,668 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:21:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 10:21:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 10:21:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 10:21:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 10:21:06,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 10:21:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:21:06,670 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 10:21:06,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:21:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 10:21:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 10:21:06,677 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:21:06,677 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 10:21:06,677 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:21:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:21:06,678 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2019-08-05 10:21:06,679 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:21:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:21:06,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 10 conjunts are in the unsatisfiable core [2019-08-05 10:21:06,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:21:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:21:06,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:21:06,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 10:21:06,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 10:21:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 10:21:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:21:06,765 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-05 10:21:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:21:06,832 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 10:21:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 10:21:06,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-05 10:21:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:21:06,833 INFO L225 Difference]: With dead ends: 7 [2019-08-05 10:21:06,833 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 10:21:06,834 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:21:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 10:21:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 10:21:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:21:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 10:21:06,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-05 10:21:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:21:06,837 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 10:21:06,837 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 10:21:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 10:21:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:21:06,838 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:21:06,838 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-05 10:21:06,838 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:21:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:21:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2019-08-05 10:21:06,839 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:21:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:21:06,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 12 conjunts are in the unsatisfiable core [2019-08-05 10:21:06,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:21:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:21:06,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:21:06,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:21:06,947 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:21:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:21:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:21:06,949 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-08-05 10:21:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:21:07,051 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 10:21:07,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:21:07,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-05 10:21:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:21:07,052 INFO L225 Difference]: With dead ends: 8 [2019-08-05 10:21:07,052 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 10:21:07,052 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:21:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 10:21:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 10:21:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 10:21:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-05 10:21:07,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-08-05 10:21:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:21:07,055 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-05 10:21:07,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:21:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-05 10:21:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-05 10:21:07,056 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:21:07,056 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2019-08-05 10:21:07,057 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:21:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:21:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2019-08-05 10:21:07,058 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:21:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:21:07,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 14 conjunts are in the unsatisfiable core [2019-08-05 10:21:07,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:21:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:21:07,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:21:07,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 10:21:07,284 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 10:21:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 10:21:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:21:07,285 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2019-08-05 10:21:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:21:07,442 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-08-05 10:21:07,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:21:07,442 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-08-05 10:21:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:21:07,443 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:21:07,443 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:21:07,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:21:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:21:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:21:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:21:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:21:07,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2019-08-05 10:21:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:21:07,445 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:21:07,445 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 10:21:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:21:07,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:21:07,450 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:21:07 BoogieIcfgContainer [2019-08-05 10:21:07,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:21:07,454 INFO L168 Benchmark]: Toolchain (without parser) took 1837.47 ms. Allocated memory was 141.6 MB in the beginning and 176.2 MB in the end (delta: 34.6 MB). Free memory was 111.1 MB in the beginning and 134.6 MB in the end (delta: -23.5 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:21:07,455 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory is still 111.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:21:07,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.91 ms. Allocated memory is still 141.6 MB. Free memory was 110.7 MB in the beginning and 109.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-05 10:21:07,457 INFO L168 Benchmark]: Boogie Preprocessor took 20.47 ms. Allocated memory is still 141.6 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 7.1 GB. [2019-08-05 10:21:07,458 INFO L168 Benchmark]: RCFGBuilder took 261.64 ms. Allocated memory is still 141.6 MB. Free memory was 108.1 MB in the beginning and 98.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-08-05 10:21:07,459 INFO L168 Benchmark]: TraceAbstraction took 1508.90 ms. Allocated memory was 141.6 MB in the beginning and 176.2 MB in the end (delta: 34.6 MB). Free memory was 98.2 MB in the beginning and 134.6 MB in the end (delta: -36.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:21:07,463 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 0.22 ms. Allocated memory is still 141.6 MB. Free memory is still 111.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.91 ms. Allocated memory is still 141.6 MB. Free memory was 110.7 MB in the beginning and 109.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.47 ms. Allocated memory is still 141.6 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 261.64 ms. Allocated memory is still 141.6 MB. Free memory was 108.1 MB in the beginning and 98.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1508.90 ms. Allocated memory was 141.6 MB in the beginning and 176.2 MB in the end (delta: 34.6 MB). Free memory was 98.2 MB in the beginning and 134.6 MB in the end (delta: -36.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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, 5 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 10 SDs, 0 SdLazy, 74 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 230 SizeOfPredicates, 15 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...