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/CountTillBound-Recursion.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:41:40,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:41:40,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:41:40,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:41:40,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:41:40,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:41:40,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:41:40,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:41:40,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:41:40,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:41:40,341 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:41:40,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:41:40,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:41:40,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:41:40,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:41:40,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:41:40,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:41:40,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:41:40,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:41:40,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:41:40,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:41:40,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:41:40,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:41:40,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:41:40,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 10:41:40,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:41:40,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:41:40,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:41:40,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:41:40,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:41:40,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:41:40,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:41:40,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:41:40,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:41:40,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:41:40,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:41:40,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:41:40,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:41:40,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:41:40,425 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:41:40,425 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:41:40,426 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/CountTillBound-Recursion.bpl [2019-08-05 10:41:40,426 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/CountTillBound-Recursion.bpl' [2019-08-05 10:41:40,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:41:40,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:41:40,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:41:40,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:41:40,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:41:40,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,502 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 10:41:40,502 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 10:41:40,502 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 10:41:40,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:41:40,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:41:40,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:41:40,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:41:40,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/1) ... [2019-08-05 10:41:40,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:41:40,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:41:40,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:41:40,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:41:40,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (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 10:41:40,596 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 10:41:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 10:41:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 10:41:40,597 INFO L124 BoogieDeclarations]: Specification and implementation of procedure inc given in one single declaration [2019-08-05 10:41:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure inc [2019-08-05 10:41:40,597 INFO L138 BoogieDeclarations]: Found implementation of procedure inc [2019-08-05 10:41:40,886 INFO L275 CfgBuilder]: Using library mode [2019-08-05 10:41:40,886 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:41:40,888 INFO L202 PluginConnector]: Adding new model CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:41:40 BoogieIcfgContainer [2019-08-05 10:41:40,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:41:40,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:41:40,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:41:40,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:41:40,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:41:40" (1/2) ... [2019-08-05 10:41:40,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c92440 and model type CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:41:40, skipping insertion in model container [2019-08-05 10:41:40,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:41:40" (2/2) ... [2019-08-05 10:41:40,899 INFO L109 eAbstractionObserver]: Analyzing ICFG CountTillBound-Recursion.bpl [2019-08-05 10:41:40,908 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:41:40,914 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:41:40,928 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:41:40,954 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:41:40,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:41:40,955 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:41:40,955 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:41:40,955 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:41:40,955 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:41:40,956 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:41:40,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:41:40,956 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:41:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-08-05 10:41:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:41:40,981 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:41:40,982 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-05 10:41:40,984 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:41:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:41:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 899819332, now seen corresponding path program 1 times [2019-08-05 10:41:41,043 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:41:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:41:41,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:41:41,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:41:41,319 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 10:41:41,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:41:41,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-08-05 10:41:41,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 10:41:41,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 10:41:41,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:41:41,339 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 5 states. [2019-08-05 10:41:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:41:41,501 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-08-05 10:41:41,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:41:41,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-05 10:41:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:41:41,513 INFO L225 Difference]: With dead ends: 13 [2019-08-05 10:41:41,514 INFO L226 Difference]: Without dead ends: 11 [2019-08-05 10:41:41,516 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:41:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-05 10:41:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-08-05 10:41:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 10:41:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-08-05 10:41:41,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2019-08-05 10:41:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:41:41,556 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-08-05 10:41:41,556 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 10:41:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-08-05 10:41:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-05 10:41:41,558 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:41:41,559 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 10:41:41,559 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:41:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:41:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash 516230568, now seen corresponding path program 1 times [2019-08-05 10:41:41,561 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:41:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:41:41,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2019-08-05 10:41:41,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:41:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-05 10:41:41,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:41:41,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 10:41:41,745 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 10:41:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 10:41:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:41:41,746 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-08-05 10:41:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:41:41,910 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-08-05 10:41:41,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-05 10:41:41,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-08-05 10:41:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:41:41,911 INFO L225 Difference]: With dead ends: 13 [2019-08-05 10:41:41,912 INFO L226 Difference]: Without dead ends: 13 [2019-08-05 10:41:41,913 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-08-05 10:41:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-08-05 10:41:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-08-05 10:41:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 10:41:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-08-05 10:41:41,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-08-05 10:41:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:41:41,918 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-08-05 10:41:41,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 10:41:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-08-05 10:41:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-08-05 10:41:41,919 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:41:41,919 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2019-08-05 10:41:41,920 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:41:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:41:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1767765772, now seen corresponding path program 2 times [2019-08-05 10:41:41,921 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:41:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:41:41,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:41:41,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:41:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-08-05 10:41:42,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:41:42,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:41:42,183 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:41:42,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:41:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:41:42,184 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-08-05 10:41:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:41:42,319 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-08-05 10:41:42,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:41:42,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-08-05 10:41:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:41:42,320 INFO L225 Difference]: With dead ends: 12 [2019-08-05 10:41:42,320 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:41:42,321 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-08-05 10:41:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:41:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:41:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:41:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:41:42,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-08-05 10:41:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:41:42,322 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:41:42,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:41:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:41:42,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:41:42,327 INFO L202 PluginConnector]: Adding new model CountTillBound-Recursion.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:41:42 BoogieIcfgContainer [2019-08-05 10:41:42,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:41:42,329 INFO L168 Benchmark]: Toolchain (without parser) took 1865.44 ms. Allocated memory was 133.7 MB in the beginning and 170.9 MB in the end (delta: 37.2 MB). Free memory was 111.2 MB in the beginning and 136.6 MB in the end (delta: -25.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-08-05 10:41:42,330 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 133.7 MB. Free memory is still 112.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:41:42,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.55 ms. Allocated memory is still 133.7 MB. Free memory was 111.2 MB in the beginning and 109.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-08-05 10:41:42,332 INFO L168 Benchmark]: Boogie Preprocessor took 21.99 ms. Allocated memory is still 133.7 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 872.6 kB). Peak memory consumption was 872.6 kB. Max. memory is 7.1 GB. [2019-08-05 10:41:42,333 INFO L168 Benchmark]: RCFGBuilder took 361.07 ms. Allocated memory is still 133.7 MB. Free memory was 108.1 MB in the beginning and 98.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-08-05 10:41:42,334 INFO L168 Benchmark]: TraceAbstraction took 1435.73 ms. Allocated memory was 133.7 MB in the beginning and 170.9 MB in the end (delta: 37.2 MB). Free memory was 98.4 MB in the beginning and 136.6 MB in the end (delta: -38.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 10:41:42,337 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 133.7 MB. Free memory is still 112.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.55 ms. Allocated memory is still 133.7 MB. Free memory was 111.2 MB in the beginning and 109.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.99 ms. Allocated memory is still 133.7 MB. Free memory was 109.0 MB in the beginning and 108.1 MB in the end (delta: 872.6 kB). Peak memory consumption was 872.6 kB. Max. memory is 7.1 GB. * RCFGBuilder took 361.07 ms. Allocated memory is still 133.7 MB. Free memory was 108.1 MB in the beginning and 98.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1435.73 ms. Allocated memory was 133.7 MB in the beginning and 170.9 MB in the end (delta: 37.2 MB). Free memory was 98.4 MB in the beginning and 136.6 MB in the end (delta: -38.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 9 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 13 SDslu, 16 SDs, 0 SdLazy, 56 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 0.6s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 1295 SizeOfPredicates, 2 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 7/13 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...