java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/abstractInterpretation/bug-old-stmt-3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:13:59,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:13:59,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:13:59,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:13:59,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:13:59,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:13:59,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:13:59,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:13:59,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:13:59,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:13:59,463 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:13:59,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:13:59,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:13:59,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:13:59,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:13:59,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:13:59,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:13:59,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:13:59,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:13:59,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:13:59,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:13:59,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:13:59,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:13:59,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:13:59,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:13:59,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:13:59,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:13:59,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:13:59,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:13:59,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:13:59,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:13:59,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:13:59,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:13:59,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:13:59,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:13:59,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:13:59,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:13:59,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:13:59,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:13:59,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:13:59,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:13:59,525 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:13:59,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:13:59,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:13:59,548 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:13:59,549 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:13:59,551 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/abstractInterpretation/bug-old-stmt-3.bpl [2019-08-05 11:13:59,551 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/abstractInterpretation/bug-old-stmt-3.bpl' [2019-08-05 11:13:59,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:13:59,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:13:59,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:13:59,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:13:59,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:13:59,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:13:59,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:13:59,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:13:59,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:13:59,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... [2019-08-05 11:13:59,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:13:59,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:13:59,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:13:59,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:13:59,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-05 11:13:59,742 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 11:13:59,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 11:13:59,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 11:13:59,948 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 11:13:59,949 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-08-05 11:13:59,950 INFO L202 PluginConnector]: Adding new model bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:13:59 BoogieIcfgContainer [2019-08-05 11:13:59,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:13:59,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:13:59,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:13:59,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:13:59,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:13:59" (1/2) ... [2019-08-05 11:13:59,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3fa21b and model type bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:13:59, skipping insertion in model container [2019-08-05 11:13:59,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:13:59" (2/2) ... [2019-08-05 11:13:59,963 INFO L109 eAbstractionObserver]: Analyzing ICFG bug-old-stmt-3.bpl [2019-08-05 11:13:59,972 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:13:59,978 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:13:59,995 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:14:00,019 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:14:00,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:14:00,020 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:14:00,021 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:14:00,021 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:14:00,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:14:00,021 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:14:00,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:14:00,022 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:14:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-05 11:14:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 11:14:00,042 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:14:00,043 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 11:14:00,045 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:14:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:14:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2019-08-05 11:14:00,102 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:14:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:14:00,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 11:14:00,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:14:00,184 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 11:14:00,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:14:00,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:14:00,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:14:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:14:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:14:00,205 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-08-05 11:14:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:14:00,251 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-05 11:14:00,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:14:00,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 11:14:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:14:00,265 INFO L225 Difference]: With dead ends: 5 [2019-08-05 11:14:00,266 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 11:14:00,268 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 11:14:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 11:14:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 11:14:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 11:14:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 11:14:00,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 11:14:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:14:00,306 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 11:14:00,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:14:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 11:14:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:14:00,307 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:14:00,307 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:14:00,307 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:14:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:14:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash 940115, now seen corresponding path program 1 times [2019-08-05 11:14:00,309 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:14:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:14:00,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:14:00,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:14:00,484 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 11:14:00,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:14:00,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 11:14:00,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:14:00,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:14:00,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:14:00,489 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 11:14:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:14:00,528 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 11:14:00,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:14:00,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:14:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:14:00,530 INFO L225 Difference]: With dead ends: 6 [2019-08-05 11:14:00,530 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 11:14:00,531 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 11:14:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 11:14:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 11:14:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 11:14:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 11:14:00,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 11:14:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:14:00,534 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 11:14:00,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:14:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 11:14:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 11:14:00,535 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:14:00,535 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 11:14:00,536 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:14:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:14:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash 29152192, now seen corresponding path program 2 times [2019-08-05 11:14:00,537 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:14:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:14:00,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:14:00,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:14:00,624 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 11:14:00,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:14:00,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 11:14:00,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:14:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:14:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:14:00,626 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-05 11:14:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:14:00,684 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 11:14:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:14:00,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-05 11:14:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:14:00,686 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:14:00,686 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 11:14:00,686 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:14:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 11:14:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 11:14:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 11:14:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 11:14:00,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-05 11:14:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:14:00,689 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 11:14:00,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:14:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 11:14:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:14:00,690 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:14:00,690 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-05 11:14:00,690 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:14:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:14:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash 903726579, now seen corresponding path program 3 times [2019-08-05 11:14:00,691 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:14:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:14:00,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-08-05 11:14:00,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:14:00,799 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 11:14:00,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:14:00,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 11:14:00,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 11:14:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 11:14:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-08-05 11:14:00,801 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-08-05 11:14:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:14:00,828 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 11:14:00,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 11:14:00,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-05 11:14:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:14:00,829 INFO L225 Difference]: With dead ends: 8 [2019-08-05 11:14:00,829 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:14:00,830 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 11:14:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:14:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-05 11:14:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-05 11:14:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-05 11:14:00,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-08-05 11:14:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:14:00,832 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-05 11:14:00,833 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 11:14:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-05 11:14:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-05 11:14:00,833 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:14:00,833 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2019-08-05 11:14:00,834 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:14:00,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:14:00,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2049238496, now seen corresponding path program 4 times [2019-08-05 11:14:00,836 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:14:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 11:14:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 11:14:00,883 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-08-05 11:14:00,899 INFO L202 PluginConnector]: Adding new model bug-old-stmt-3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:14:00 BoogieIcfgContainer [2019-08-05 11:14:00,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:14:00,903 INFO L168 Benchmark]: Toolchain (without parser) took 1312.88 ms. Allocated memory was 135.8 MB in the beginning and 172.5 MB in the end (delta: 36.7 MB). Free memory was 110.0 MB in the beginning and 147.5 MB in the end (delta: -37.5 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. [2019-08-05 11:14:00,904 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.32 ms. Allocated memory is still 135.8 MB. Free memory was 111.3 MB in the beginning and 111.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 11:14:00,906 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.83 ms. Allocated memory is still 135.8 MB. Free memory was 110.0 MB in the beginning and 107.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:14:00,907 INFO L168 Benchmark]: Boogie Preprocessor took 26.48 ms. Allocated memory is still 135.8 MB. Free memory was 107.9 MB in the beginning and 106.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:14:00,908 INFO L168 Benchmark]: RCFGBuilder took 284.26 ms. Allocated memory is still 135.8 MB. Free memory was 106.7 MB in the beginning and 97.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-08-05 11:14:00,909 INFO L168 Benchmark]: TraceAbstraction took 944.81 ms. Allocated memory was 135.8 MB in the beginning and 172.5 MB in the end (delta: 36.7 MB). Free memory was 97.3 MB in the beginning and 147.5 MB in the end (delta: -50.2 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. [2019-08-05 11:14:00,914 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 0.32 ms. Allocated memory is still 135.8 MB. Free memory was 111.3 MB in the beginning and 111.1 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 48.83 ms. Allocated memory is still 135.8 MB. Free memory was 110.0 MB in the beginning and 107.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.48 ms. Allocated memory is still 135.8 MB. Free memory was 107.9 MB in the beginning and 106.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 284.26 ms. Allocated memory is still 135.8 MB. Free memory was 106.7 MB in the beginning and 97.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 944.81 ms. Allocated memory was 135.8 MB in the beginning and 172.5 MB in the end (delta: 36.7 MB). Free memory was 97.3 MB in the beginning and 147.5 MB in the end (delta: -50.2 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 38]: assertion can be violated assertion can be violated We found a FailurePath: [L15] x := 0; [L17] i := 0; VAL [x=0] [L20] COND TRUE i < 4 [L25] i := i + 1; VAL [x=0] [L20] COND TRUE i < 4 [L25] i := i + 1; VAL [x=0] [L20] COND TRUE i < 4 [L25] i := i + 1; VAL [x=0] [L20] COND TRUE i < 4 [L25] i := i + 1; VAL [x=0] [L20] COND FALSE !(i < 4) [L32] x := 1; VAL [x=1] [L38] assert false; VAL [x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 6 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 4 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/10 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...