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/Pdr/oneLoopWithBreakSafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:16:52,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:16:52,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:16:52,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:16:52,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:16:52,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:16:52,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:16:52,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:16:52,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:16:52,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:16:52,825 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:16:52,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:16:52,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:16:52,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:16:52,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:16:52,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:16:52,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:16:52,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:16:52,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:16:52,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:16:52,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:16:52,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:16:52,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:16:52,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:16:52,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:16:52,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:16:52,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:16:52,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:16:52,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:16:52,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:16:52,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:16:52,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:16:52,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:16:52,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:16:52,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:16:52,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:16:52,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:16:52,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:16:52,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:16:52,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:16:52,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:16:52,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:16:52,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:16:52,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:16:52,927 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:16:52,928 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:16:52,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/Pdr/oneLoopWithBreakSafe.bpl [2019-08-05 11:16:52,929 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/Pdr/oneLoopWithBreakSafe.bpl' [2019-08-05 11:16:52,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:16:52,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:16:52,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:16:52,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:16:52,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:16:52,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:52,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:52,992 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:16:52,994 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:16:52,994 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:16:52,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:16:52,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:16:52,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:16:52,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:16:53,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/1) ... [2019-08-05 11:16:53,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:16:53,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:16:53,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:16:53,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:16:53,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (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 11:16:53,090 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 11:16:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 11:16:53,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 11:16:53,264 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:16:53,265 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:16:53,266 INFO L202 PluginConnector]: Adding new model oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:16:53 BoogieIcfgContainer [2019-08-05 11:16:53,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:16:53,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:16:53,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:16:53,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:16:53,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:16:52" (1/2) ... [2019-08-05 11:16:53,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2d1844 and model type oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:16:53, skipping insertion in model container [2019-08-05 11:16:53,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:16:53" (2/2) ... [2019-08-05 11:16:53,274 INFO L109 eAbstractionObserver]: Analyzing ICFG oneLoopWithBreakSafe.bpl [2019-08-05 11:16:53,284 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:16:53,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:16:53,306 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:16:53,327 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:16:53,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:16:53,328 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:16:53,328 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:16:53,328 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:16:53,329 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:16:53,329 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:16:53,329 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:16:53,329 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:16:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-05 11:16:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 11:16:53,348 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:53,349 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 11:16:53,351 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:16:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash 30145, now seen corresponding path program 1 times [2019-08-05 11:16:53,402 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:53,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 11:16:53,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:53,472 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 11:16:53,474 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:53,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:16:53,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:16:53,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:16:53,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:53,492 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-08-05 11:16:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:53,572 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2019-08-05 11:16:53,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:16:53,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 11:16:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:53,590 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:16:53,590 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 11:16:53,596 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 11:16:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 11:16:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 11:16:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 11:16:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-08-05 11:16:53,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2019-08-05 11:16:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:53,681 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-08-05 11:16:53,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:16:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2019-08-05 11:16:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:16:53,682 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:53,682 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:16:53,682 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:16:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash 927595, now seen corresponding path program 1 times [2019-08-05 11:16:53,684 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:53,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:16:53,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:53,767 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 11:16:53,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:53,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:16:53,772 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:16:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:16:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:16:53,773 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2019-08-05 11:16:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:53,858 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2019-08-05 11:16:53,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:16:53,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:16:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:53,859 INFO L225 Difference]: With dead ends: 8 [2019-08-05 11:16:53,859 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:16:53,860 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:16:53,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:16:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 11:16:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 11:16:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-08-05 11:16:53,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 4 [2019-08-05 11:16:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:53,863 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-08-05 11:16:53,863 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:16:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-08-05 11:16:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:16:53,863 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:53,864 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-08-05 11:16:53,864 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:16:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 891469958, now seen corresponding path program 1 times [2019-08-05 11:16:53,866 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:53,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:16:53,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-08-05 11:16:53,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:16:53,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:16:53,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:16:53,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:16:53,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:16:53,906 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2019-08-05 11:16:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:53,954 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-08-05 11:16:53,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:16:53,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-08-05 11:16:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:53,956 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:16:53,956 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:16:53,957 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 11:16:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:16:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 11:16:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 11:16:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-05 11:16:53,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-08-05 11:16:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:53,963 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-05 11:16:53,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:16:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-05 11:16:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-05 11:16:53,964 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:53,964 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2019-08-05 11:16:53,965 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:16:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766795, now seen corresponding path program 1 times [2019-08-05 11:16:53,966 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:53,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:16:53,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:16:54,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:16:54,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 11:16:54,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:16:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:16:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:16:54,210 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2019-08-05 11:16:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:54,332 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-08-05 11:16:54,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:16:54,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-08-05 11:16:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:54,334 INFO L225 Difference]: With dead ends: 10 [2019-08-05 11:16:54,334 INFO L226 Difference]: Without dead ends: 10 [2019-08-05 11:16:54,335 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:16:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-05 11:16:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-08-05 11:16:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-08-05 11:16:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-08-05 11:16:54,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2019-08-05 11:16:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:54,338 INFO L475 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-08-05 11:16:54,338 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:16:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-08-05 11:16:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-08-05 11:16:54,339 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:16:54,339 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2019-08-05 11:16:54,340 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:16:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:16:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315536, now seen corresponding path program 2 times [2019-08-05 11:16:54,341 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:16:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:16:54,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 11:16:54,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:16:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:16:54,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:16:54,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 11:16:54,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 11:16:54,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 11:16:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:16:54,503 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2019-08-05 11:16:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:16:54,562 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 11:16:54,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 11:16:54,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-08-05 11:16:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:16:54,563 INFO L225 Difference]: With dead ends: 8 [2019-08-05 11:16:54,563 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:16:54,564 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:16:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:16:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:16:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:16:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:16:54,565 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2019-08-05 11:16:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:16:54,566 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:16:54,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 11:16:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:16:54,567 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:16:54,572 INFO L202 PluginConnector]: Adding new model oneLoopWithBreakSafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:16:54 BoogieIcfgContainer [2019-08-05 11:16:54,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:16:54,575 INFO L168 Benchmark]: Toolchain (without parser) took 1616.06 ms. Allocated memory was 135.3 MB in the beginning and 169.3 MB in the end (delta: 34.1 MB). Free memory was 111.6 MB in the beginning and 140.3 MB in the end (delta: -28.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:54,576 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 135.3 MB. Free memory is still 112.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:16:54,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 135.3 MB. Free memory was 111.6 MB in the beginning and 109.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:54,578 INFO L168 Benchmark]: Boogie Preprocessor took 25.04 ms. Allocated memory is still 135.3 MB. Free memory was 109.5 MB in the beginning and 108.5 MB in the end (delta: 933.8 kB). Peak memory consumption was 933.8 kB. Max. memory is 7.1 GB. [2019-08-05 11:16:54,579 INFO L168 Benchmark]: RCFGBuilder took 243.60 ms. Allocated memory is still 135.3 MB. Free memory was 108.5 MB in the beginning and 99.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-08-05 11:16:54,580 INFO L168 Benchmark]: TraceAbstraction took 1304.70 ms. Allocated memory was 135.3 MB in the beginning and 169.3 MB in the end (delta: 34.1 MB). Free memory was 99.2 MB in the beginning and 140.3 MB in the end (delta: -41.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:16:54,584 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 135.3 MB. Free memory is still 112.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 135.3 MB. Free memory was 111.6 MB in the beginning and 109.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.04 ms. Allocated memory is still 135.3 MB. Free memory was 109.5 MB in the beginning and 108.5 MB in the end (delta: 933.8 kB). Peak memory consumption was 933.8 kB. Max. memory is 7.1 GB. * RCFGBuilder took 243.60 ms. Allocated memory is still 135.3 MB. Free memory was 108.5 MB in the beginning and 99.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1304.70 ms. Allocated memory was 135.3 MB in the beginning and 169.3 MB in the end (delta: 34.1 MB). Free memory was 99.2 MB in the beginning and 140.3 MB in the end (delta: -41.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 6 locations, 1 error locations. SAFE Result, 1.2s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 45 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 336 SizeOfPredicates, 4 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/15 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...