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/toy/InvariantSynthesis/InvariantSynthesis_WPHelpful01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:43:54,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:43:54,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:43:54,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:43:54,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:43:54,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:43:54,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:43:54,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:43:54,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:43:54,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:43:54,749 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:43:54,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:43:54,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:43:54,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:43:54,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:43:54,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:43:54,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:43:54,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:43:54,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:43:54,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:43:54,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:43:54,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:43:54,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:43:54,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:43:54,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:43:54,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:43:54,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:43:54,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:43:54,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:43:54,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:43:54,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:43:54,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:43:54,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:43:54,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:43:54,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:43:54,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:43:54,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:43:54,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:43:54,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:43:54,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:43:54,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:43:54,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:43:54,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:43:54,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:43:54,825 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:43:54,826 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:43:54,827 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/InvariantSynthesis/InvariantSynthesis_WPHelpful01.bpl [2019-08-05 10:43:54,827 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/InvariantSynthesis/InvariantSynthesis_WPHelpful01.bpl' [2019-08-05 10:43:54,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:43:54,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:43:54,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:43:54,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:43:54,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:43:54,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,899 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 10:43:54,900 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 10:43:54,900 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 10:43:54,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:43:54,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:43:54,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:43:54,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:43:54,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/1) ... [2019-08-05 10:43:54,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:43:54,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:43:54,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:43:54,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:43:54,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (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 10:43:55,001 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 10:43:55,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 10:43:55,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 10:43:55,279 INFO L275 CfgBuilder]: Using library mode [2019-08-05 10:43:55,279 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:43:55,280 INFO L202 PluginConnector]: Adding new model InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:43:55 BoogieIcfgContainer [2019-08-05 10:43:55,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:43:55,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:43:55,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:43:55,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:43:55,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:54" (1/2) ... [2019-08-05 10:43:55,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221a5985 and model type InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:43:55, skipping insertion in model container [2019-08-05 10:43:55,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:43:55" (2/2) ... [2019-08-05 10:43:55,289 INFO L109 eAbstractionObserver]: Analyzing ICFG InvariantSynthesis_WPHelpful01.bpl [2019-08-05 10:43:55,299 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:43:55,306 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:43:55,323 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:43:55,349 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:43:55,350 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:43:55,350 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:43:55,350 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:43:55,350 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:43:55,350 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:43:55,351 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:43:55,351 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:43:55,351 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:43:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 10:43:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 10:43:55,373 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:55,374 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 10:43:55,377 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash 30368, now seen corresponding path program 1 times [2019-08-05 10:43:55,434 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:55,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 10:43:55,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:55,507 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 10:43:55,509 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:43:55,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 10:43:55,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:43:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:43:55,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:43:55,527 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 10:43:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:55,568 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:43:55,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:43:55,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 10:43:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:55,582 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:43:55,582 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 10:43:55,588 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 10:43:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 10:43:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 10:43:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 10:43:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 10:43:55,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 10:43:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:55,634 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 10:43:55,634 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:43:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 10:43:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:43:55,635 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:55,636 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:43:55,636 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash 949084, now seen corresponding path program 1 times [2019-08-05 10:43:55,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:55,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:43:55,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:55,767 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:43:55,825 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 10:43:55,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:43:55,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:43:55,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:43:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:43:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:43:55,829 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 10:43:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:55,886 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:43:55,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:43:55,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:43:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:55,887 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:43:55,887 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 10:43:55,888 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:43:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 10:43:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 10:43:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 10:43:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 10:43:55,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 10:43:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:55,891 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 10:43:55,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:43:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 10:43:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 10:43:55,892 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:55,892 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 10:43:55,893 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 29429280, now seen corresponding path program 2 times [2019-08-05 10:43:55,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:55,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 10:43:55,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:55,910 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:43:55,911 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:43:55,914 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:43:56,055 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2019-08-05 10:43:56,057 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:43:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-05 10:43:56,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:43:56,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 10:43:56,083 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:43:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:43:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:43:56,084 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2019-08-05 10:43:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:56,217 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-05 10:43:56,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:43:56,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-08-05 10:43:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:56,219 INFO L225 Difference]: With dead ends: 5 [2019-08-05 10:43:56,219 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:43:56,221 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:43:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:43:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:43:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:43:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:43:56,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-08-05 10:43:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:56,223 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:43:56,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:43:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:43:56,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:43:56,232 INFO L202 PluginConnector]: Adding new model InvariantSynthesis_WPHelpful01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:43:56 BoogieIcfgContainer [2019-08-05 10:43:56,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:43:56,235 INFO L168 Benchmark]: Toolchain (without parser) took 1370.03 ms. Allocated memory was 140.5 MB in the beginning and 177.2 MB in the end (delta: 36.7 MB). Free memory was 108.9 MB in the beginning and 145.7 MB in the end (delta: -36.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:43:56,237 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 110.2 MB in the beginning and 109.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-08-05 10:43:56,238 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.37 ms. Allocated memory is still 140.5 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 10:43:56,241 INFO L168 Benchmark]: Boogie Preprocessor took 26.21 ms. Allocated memory is still 140.5 MB. Free memory was 107.1 MB in the beginning and 105.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:43:56,242 INFO L168 Benchmark]: RCFGBuilder took 351.05 ms. Allocated memory is still 140.5 MB. Free memory was 105.8 MB in the beginning and 94.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:43:56,243 INFO L168 Benchmark]: TraceAbstraction took 951.35 ms. Allocated memory was 140.5 MB in the beginning and 177.2 MB in the end (delta: 36.7 MB). Free memory was 94.5 MB in the beginning and 145.7 MB in the end (delta: -51.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:43:56,249 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 140.5 MB. Free memory was 110.2 MB in the beginning and 109.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.37 ms. Allocated memory is still 140.5 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 26.21 ms. Allocated memory is still 140.5 MB. Free memory was 107.1 MB in the beginning and 105.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.05 ms. Allocated memory is still 140.5 MB. Free memory was 105.8 MB in the beginning and 94.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 951.35 ms. Allocated memory was 140.5 MB in the beginning and 177.2 MB in the end (delta: 36.7 MB). Free memory was 94.5 MB in the beginning and 145.7 MB in the end (delta: -51.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: 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, 0.8s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 11 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 113 SizeOfPredicates, 3 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 3/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...