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/loopAcceleration/simpleLoop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:17:00,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:17:00,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:17:00,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:17:00,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:17:00,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:17:00,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:17:00,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:17:00,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:17:00,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:17:00,623 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:17:00,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:17:00,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:17:00,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:17:00,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:17:00,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:17:00,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:17:00,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:17:00,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:17:00,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:17:00,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:17:00,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:17:00,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:17:00,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:17:00,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 11:17:00,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 11:17:00,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 11:17:00,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 11:17:00,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 11:17:00,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 11:17:00,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:17:00,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:17:00,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:17:00,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:17:00,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:17:00,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:17:00,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:17:00,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:17:00,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:17:00,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:17:00,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:17:00,688 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:17:00,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:17:00,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:17:00,706 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:17:00,707 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:17:00,707 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/loopAcceleration/simpleLoop.bpl [2019-08-05 11:17:00,708 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/loopAcceleration/simpleLoop.bpl' [2019-08-05 11:17:00,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:17:00,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:17:00,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:17:00,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:17:00,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:17:00,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,775 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:17:00,776 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:17:00,776 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:17:00,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:17:00,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:17:00,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:17:00,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:17:00,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/1) ... [2019-08-05 11:17:00,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:17:00,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:17:00,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:17:00,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:17:00,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (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 11:17:00,876 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 11:17:00,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 11:17:00,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 11:17:01,128 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:17:01,129 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:17:01,130 INFO L202 PluginConnector]: Adding new model simpleLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:17:01 BoogieIcfgContainer [2019-08-05 11:17:01,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:17:01,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:17:01,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:17:01,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:17:01,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:17:00" (1/2) ... [2019-08-05 11:17:01,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af17d0 and model type simpleLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:17:01, skipping insertion in model container [2019-08-05 11:17:01,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpleLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:17:01" (2/2) ... [2019-08-05 11:17:01,149 INFO L109 eAbstractionObserver]: Analyzing ICFG simpleLoop.bpl [2019-08-05 11:17:01,161 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:17:01,170 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:17:01,187 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:17:01,219 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:17:01,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:17:01,220 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:17:01,220 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:17:01,220 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:17:01,220 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:17:01,221 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:17:01,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:17:01,221 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:17:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 11:17:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 11:17:01,243 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:17:01,244 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 11:17:01,247 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:17:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:17:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash 29984, now seen corresponding path program 1 times [2019-08-05 11:17:01,304 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:17:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:17:01,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 11:17:01,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:17:01,384 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 11:17:01,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:17:01,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:17:01,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:17:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:17:01,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:17:01,408 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 11:17:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:17:01,450 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 11:17:01,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:17:01,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 11:17:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:17:01,463 INFO L225 Difference]: With dead ends: 6 [2019-08-05 11:17:01,463 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 11:17:01,465 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 11:17:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 11:17:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 11:17:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 11:17:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 11:17:01,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 11:17:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:17:01,497 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 11:17:01,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:17:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 11:17:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:17:01,498 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:17:01,498 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:17:01,498 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:17:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:17:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash 927558, now seen corresponding path program 1 times [2019-08-05 11:17:01,500 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:17:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:17:01,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:17:01,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:17:01,669 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 11:17:01,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:17:01,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 11:17:01,671 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:17:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:17:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:17:01,672 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 11:17:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:17:01,716 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 11:17:01,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:17:01,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:17:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:17:01,717 INFO L225 Difference]: With dead ends: 6 [2019-08-05 11:17:01,717 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 11:17:01,718 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 11:17:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 11:17:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 11:17:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 11:17:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 11:17:01,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 11:17:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:17:01,721 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 11:17:01,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:17:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 11:17:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 11:17:01,722 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:17:01,722 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 11:17:01,722 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:17:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:17:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash 28752352, now seen corresponding path program 2 times [2019-08-05 11:17:01,724 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:17:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:17:01,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:17:01,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:17:01,821 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 11:17:01,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:17:01,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:17:01,822 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:17:01,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:17:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:17:01,823 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2019-08-05 11:17:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:17:01,872 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-05 11:17:01,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:17:01,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-08-05 11:17:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:17:01,874 INFO L225 Difference]: With dead ends: 5 [2019-08-05 11:17:01,874 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:17:01,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:17:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:17:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:17:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:17:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:17:01,876 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-08-05 11:17:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:17:01,876 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:17:01,877 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:17:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:17:01,877 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:17:01,881 INFO L202 PluginConnector]: Adding new model simpleLoop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:17:01 BoogieIcfgContainer [2019-08-05 11:17:01,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:17:01,884 INFO L168 Benchmark]: Toolchain (without parser) took 1141.79 ms. Allocated memory is still 133.7 MB. Free memory was 111.4 MB in the beginning and 70.9 MB in the end (delta: 40.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2019-08-05 11:17:01,885 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 133.7 MB. Free memory was 112.5 MB in the beginning and 112.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-08-05 11:17:01,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.43 ms. Allocated memory is still 133.7 MB. Free memory was 111.2 MB in the beginning and 109.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-08-05 11:17:01,887 INFO L168 Benchmark]: Boogie Preprocessor took 21.63 ms. Allocated memory is still 133.7 MB. Free memory was 109.3 MB in the beginning and 108.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:17:01,888 INFO L168 Benchmark]: RCFGBuilder took 329.08 ms. Allocated memory is still 133.7 MB. Free memory was 108.2 MB in the beginning and 99.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-08-05 11:17:01,889 INFO L168 Benchmark]: TraceAbstraction took 746.06 ms. Allocated memory is still 133.7 MB. Free memory was 99.1 MB in the beginning and 70.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:17:01,894 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 0.23 ms. Allocated memory is still 133.7 MB. Free memory was 112.5 MB in the beginning and 112.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.43 ms. Allocated memory is still 133.7 MB. Free memory was 111.2 MB in the beginning and 109.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.63 ms. Allocated memory is still 133.7 MB. Free memory was 109.3 MB in the beginning and 108.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.08 ms. Allocated memory is still 133.7 MB. Free memory was 108.2 MB in the beginning and 99.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 746.06 ms. Allocated memory is still 133.7 MB. Free memory was 99.1 MB in the beginning and 70.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 0.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 16 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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, 77 SizeOfPredicates, 2 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 9 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...