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/errorLocalization/WhileLoop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:43:15,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:43:15,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:43:15,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:43:15,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:43:15,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:43:15,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:43:15,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:43:15,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:43:15,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:43:15,236 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:43:15,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:43:15,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:43:15,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:43:15,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:43:15,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:43:15,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:43:15,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:43:15,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:43:15,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:43:15,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:43:15,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:43:15,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:43:15,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:43:15,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 10:43:15,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:43:15,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:43:15,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:43:15,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:43:15,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:43:15,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:43:15,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:43:15,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:43:15,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:43:15,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:43:15,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:43:15,310 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:43:15,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:43:15,330 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:43:15,332 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:43:15,333 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:43:15,333 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/errorLocalization/WhileLoop.bpl [2019-08-05 10:43:15,334 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/errorLocalization/WhileLoop.bpl' [2019-08-05 10:43:15,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:43:15,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:43:15,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:43:15,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:43:15,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:43:15,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,408 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 10:43:15,409 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 10:43:15,409 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 10:43:15,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:43:15,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:43:15,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:43:15,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:43:15,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/1) ... [2019-08-05 10:43:15,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:43:15,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:43:15,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:43:15,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:43:15,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (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 10:43:15,510 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2019-08-05 10:43:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-08-05 10:43:15,511 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-08-05 10:43:15,754 INFO L275 CfgBuilder]: Using library mode [2019-08-05 10:43:15,754 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:43:15,756 INFO L202 PluginConnector]: Adding new model WhileLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:43:15 BoogieIcfgContainer [2019-08-05 10:43:15,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:43:15,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:43:15,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:43:15,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:43:15,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:43:15" (1/2) ... [2019-08-05 10:43:15,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fde1dc6 and model type WhileLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:43:15, skipping insertion in model container [2019-08-05 10:43:15,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "WhileLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:43:15" (2/2) ... [2019-08-05 10:43:15,765 INFO L109 eAbstractionObserver]: Analyzing ICFG WhileLoop.bpl [2019-08-05 10:43:15,775 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:43:15,782 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:43:15,798 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:43:15,823 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:43:15,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:43:15,825 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:43:15,825 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:43:15,825 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:43:15,825 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:43:15,825 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:43:15,826 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:43:15,826 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:43:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 10:43:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 10:43:15,845 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:15,846 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 10:43:15,848 INFO L418 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2019-08-05 10:43:15,901 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:15,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 10:43:15,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:15,985 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 10:43:15,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:43:15,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 10:43:15,992 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:43:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:43:16,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:43:16,007 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 10:43:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:16,057 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:43:16,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:43:16,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 10:43:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:16,070 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:43:16,070 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 10:43:16,072 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 10:43:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 10:43:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 10:43:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 10:43:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 10:43:16,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 10:43:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:16,099 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 10:43:16,099 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:43:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 10:43:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:43:16,100 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:16,100 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:43:16,100 INFO L418 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2019-08-05 10:43:16,102 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:16,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 10:43:16,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:16,209 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 10:43:16,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:43:16,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:43:16,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:43:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:43:16,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:43:16,213 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 10:43:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:16,299 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:43:16,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:43:16,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:43:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:16,302 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:43:16,302 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 10:43:16,304 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 10:43:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 10:43:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 10:43:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 10:43:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 10:43:16,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 10:43:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:16,307 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 10:43:16,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:43:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 10:43:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 10:43:16,309 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:16,309 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 10:43:16,309 INFO L418 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2019-08-05 10:43:16,312 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:16,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:43:16,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:16,461 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 10:43:16,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:43:16,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 10:43:16,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 10:43:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 10:43:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:43:16,463 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-05 10:43:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:16,499 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 10:43:16,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 10:43:16,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-05 10:43:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:16,500 INFO L225 Difference]: With dead ends: 7 [2019-08-05 10:43:16,500 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 10:43:16,501 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:43:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 10:43:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 10:43:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:43:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 10:43:16,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-05 10:43:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:16,504 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 10:43:16,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 10:43:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 10:43:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:43:16,505 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:16,505 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-05 10:43:16,505 INFO L418 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash 891320966, now seen corresponding path program 3 times [2019-08-05 10:43:16,507 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:16,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 10:43:16,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:16,621 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 10:43:16,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:43:16,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:43:16,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:43:16,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:43:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:43:16,623 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-08-05 10:43:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:16,652 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 10:43:16,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:43:16,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-05 10:43:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:16,654 INFO L225 Difference]: With dead ends: 8 [2019-08-05 10:43:16,654 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 10:43:16,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:43:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 10:43:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 10:43:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 10:43:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-05 10:43:16,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-08-05 10:43:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:16,669 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-05 10:43:16,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:43:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-05 10:43:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-05 10:43:16,670 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:16,671 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2019-08-05 10:43:16,672 INFO L418 AbstractCegarLoop]: === Iteration 5 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144224, now seen corresponding path program 4 times [2019-08-05 10:43:16,674 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:43:16,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:43:16,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:43:16,817 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 10:43:16,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:43:16,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 10:43:16,818 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 10:43:16,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 10:43:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:43:16,819 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2019-08-05 10:43:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:43:16,959 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-08-05 10:43:16,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:43:16,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2019-08-05 10:43:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:43:16,960 INFO L225 Difference]: With dead ends: 9 [2019-08-05 10:43:16,961 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 10:43:16,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:43:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 10:43:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 10:43:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 10:43:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-05 10:43:16,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-08-05 10:43:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:43:16,964 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-05 10:43:16,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 10:43:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-05 10:43:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 10:43:16,965 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:43:16,965 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2019-08-05 10:43:16,966 INFO L418 AbstractCegarLoop]: === Iteration 6 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:43:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:43:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894150, now seen corresponding path program 5 times [2019-08-05 10:43:16,967 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:43:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 10:43:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 10:43:17,017 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-08-05 10:43:17,036 INFO L202 PluginConnector]: Adding new model WhileLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:43:17 BoogieIcfgContainer [2019-08-05 10:43:17,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:43:17,039 INFO L168 Benchmark]: Toolchain (without parser) took 1665.68 ms. Allocated memory was 140.5 MB in the beginning and 177.2 MB in the end (delta: 36.7 MB). Free memory was 108.7 MB in the beginning and 136.1 MB in the end (delta: -27.4 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:43:17,040 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 110.0 MB in the beginning and 109.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 10:43:17,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.58 ms. Allocated memory is still 140.5 MB. Free memory was 108.7 MB in the beginning and 106.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-08-05 10:43:17,043 INFO L168 Benchmark]: Boogie Preprocessor took 25.54 ms. Allocated memory is still 140.5 MB. Free memory was 106.8 MB in the beginning and 105.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:43:17,043 INFO L168 Benchmark]: RCFGBuilder took 318.36 ms. Allocated memory is still 140.5 MB. Free memory was 105.7 MB in the beginning and 96.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:43:17,045 INFO L168 Benchmark]: TraceAbstraction took 1278.55 ms. Allocated memory was 140.5 MB in the beginning and 177.2 MB in the end (delta: 36.7 MB). Free memory was 96.2 MB in the beginning and 136.1 MB in the end (delta: -39.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:43:17,049 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 110.0 MB in the beginning and 109.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.58 ms. Allocated memory is still 140.5 MB. Free memory was 108.7 MB in the beginning and 106.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.54 ms. Allocated memory is still 140.5 MB. Free memory was 106.8 MB in the beginning and 105.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.36 ms. Allocated memory is still 140.5 MB. Free memory was 105.7 MB in the beginning and 96.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1278.55 ms. Allocated memory was 140.5 MB in the beginning and 177.2 MB in the end (delta: 36.7 MB). Free memory was 96.2 MB in the beginning and 136.1 MB in the end (delta: -39.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: assertion can be violated assertion can be violated We found a FailurePath: [L12] y := 0; [L13] z := 0; [L14] i := 0; VAL [i=0, y=0, z=0] [L16] COND TRUE i < 5 [L18] x := y; [L19] y := y + 1; [L20] i := i + 1; VAL [i=1, x=0, y=1, z=0] [L16] COND TRUE i < 5 [L18] x := y; [L19] y := y + 1; [L20] i := i + 1; VAL [i=2, x=1, y=2, z=0] [L16] COND TRUE i < 5 [L18] x := y; [L19] y := y + 1; [L20] i := i + 1; VAL [i=3, x=2, y=3, z=0] [L16] COND TRUE i < 5 [L18] x := y; [L19] y := y + 1; [L20] i := i + 1; VAL [i=4, x=3, y=4, z=0] [L16] COND TRUE i < 5 [L18] x := y; [L19] y := y + 1; [L20] i := i + 1; VAL [i=5, x=4, y=5, z=0] [L16] COND FALSE !(i < 5) VAL [i=5, x=4, y=5, z=0] [L23] assert x == 5; VAL [i=5, x=4, y=5, z=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. UNSAFE Result, 1.2s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 16 SDtfs, 0 SDslu, 11 SDs, 0 SdLazy, 30 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s 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=9occurred in iteration=5, 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, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 230 SizeOfPredicates, 5 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 20 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 incorrect! Received shutdown request...