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/20170304-DifficultPathPrograms/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:16:25,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:16:25,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:16:25,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:16:25,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:16:25,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:16:25,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:16:25,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:16:25,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:16:25,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:16:25,325 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:16:25,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:16:25,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:16:25,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:16:25,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:16:25,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:16:25,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:16:25,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:16:25,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:16:25,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:16:25,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:16:25,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:16:25,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:16:25,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:16:25,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 10:16:25,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:16:25,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:16:25,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:16:25,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:16:25,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:16:25,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:16:25,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:16:25,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:16:25,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:16:25,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:16:25,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:16:25,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:16:25,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:16:25,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:16:25,397 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:16:25,398 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:16:25,400 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl [2019-08-05 10:16:25,400 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl' [2019-08-05 10:16:25,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:16:25,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:16:25,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:16:25,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:16:25,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:16:25,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:16:25,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:16:25,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:16:25,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:16:25,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/1) ... [2019-08-05 10:16:25,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:16:25,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:16:25,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:16:25,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:16:25,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (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 10:16:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 10:16:25,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 10:16:26,441 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 10:16:26,442 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-05 10:16:26,443 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:16:26 BoogieIcfgContainer [2019-08-05 10:16:26,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:16:26,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:16:26,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:16:26,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:16:26,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:16:25" (1/2) ... [2019-08-05 10:16:26,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2721b9ba and model type pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:16:26, skipping insertion in model container [2019-08-05 10:16:26,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:16:26" (2/2) ... [2019-08-05 10:16:26,452 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl [2019-08-05 10:16:26,461 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:16:26,467 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:16:26,481 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:16:26,506 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:16:26,507 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:16:26,507 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:16:26,508 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:16:26,508 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:16:26,508 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:16:26,508 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:16:26,508 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:16:26,509 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:16:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-05 10:16:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:16:26,529 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:16:26,530 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:16:26,533 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:16:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:16:26,538 INFO L82 PathProgramCache]: Analyzing trace with hash 979518, now seen corresponding path program 1 times [2019-08-05 10:16:26,598 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:16:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:16:26,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2019-08-05 10:16:26,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:16:26,847 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:26,922 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 10:16:26,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:16:26,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 10:16:26,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:16:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:16:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:16:26,947 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-08-05 10:16:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:16:27,045 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 10:16:27,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:16:27,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:16:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:16:27,059 INFO L225 Difference]: With dead ends: 8 [2019-08-05 10:16:27,059 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 10:16:27,061 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:16:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 10:16:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-08-05 10:16:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:16:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 10:16:27,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-08-05 10:16:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:16:27,100 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 10:16:27,100 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:16:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 10:16:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:16:27,101 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:16:27,101 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-08-05 10:16:27,101 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:16:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:16:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash 941392015, now seen corresponding path program 1 times [2019-08-05 10:16:27,104 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:16:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:16:27,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2019-08-05 10:16:27,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:16:27,331 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:27,406 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:16:27,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:16:27,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 10:16:27,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 10:16:27,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 10:16:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:16:27,461 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-08-05 10:16:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:16:27,580 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-08-05 10:16:27,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 10:16:27,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-05 10:16:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:16:27,581 INFO L225 Difference]: With dead ends: 10 [2019-08-05 10:16:27,581 INFO L226 Difference]: Without dead ends: 10 [2019-08-05 10:16:27,582 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:16:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-05 10:16:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-08-05 10:16:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 10:16:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-05 10:16:27,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-08-05 10:16:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:16:27,585 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-05 10:16:27,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 10:16:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-05 10:16:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 10:16:27,586 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:16:27,586 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-08-05 10:16:27,586 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:16:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:16:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1560297824, now seen corresponding path program 2 times [2019-08-05 10:16:27,589 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:16:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:16:27,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2019-08-05 10:16:27,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:16:27,730 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:27,802 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:27,803 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:28,738 WARN L188 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-08-05 10:16:28,740 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-08-05 10:16:29,045 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2019-08-05 10:16:29,059 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:16:29,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:16:29,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 10:16:29,216 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 10:16:29,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 10:16:29,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:16:29,218 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2019-08-05 10:16:29,664 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2019-08-05 10:16:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:16:29,719 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-08-05 10:16:29,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:16:29,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-08-05 10:16:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:16:29,720 INFO L225 Difference]: With dead ends: 11 [2019-08-05 10:16:29,720 INFO L226 Difference]: Without dead ends: 11 [2019-08-05 10:16:29,721 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-08-05 10:16:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-05 10:16:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-08-05 10:16:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 10:16:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-08-05 10:16:29,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-08-05 10:16:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:16:29,725 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-08-05 10:16:29,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 10:16:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-08-05 10:16:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-05 10:16:29,726 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:16:29,726 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2019-08-05 10:16:29,726 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:16:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:16:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash -502547343, now seen corresponding path program 3 times [2019-08-05 10:16:29,729 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:16:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:16:29,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2019-08-05 10:16:29,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:16:29,904 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:30,004 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:16:30,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:16:30,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 10:16:30,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 10:16:30,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 10:16:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-08-05 10:16:30,016 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2019-08-05 10:16:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:16:30,228 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-08-05 10:16:30,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:16:30,229 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-08-05 10:16:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:16:30,230 INFO L225 Difference]: With dead ends: 16 [2019-08-05 10:16:30,230 INFO L226 Difference]: Without dead ends: 16 [2019-08-05 10:16:30,231 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-08-05 10:16:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-08-05 10:16:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-08-05 10:16:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-08-05 10:16:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-08-05 10:16:30,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2019-08-05 10:16:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:16:30,234 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-08-05 10:16:30,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 10:16:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-08-05 10:16:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-08-05 10:16:30,235 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:16:30,235 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2019-08-05 10:16:30,235 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:16:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:16:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1213609811, now seen corresponding path program 4 times [2019-08-05 10:16:30,237 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:16:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:16:30,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2019-08-05 10:16:30,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:16:30,460 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:30,496 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:16:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-08-05 10:16:30,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:16:30,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:16:30,682 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:16:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:16:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:16:30,683 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2019-08-05 10:16:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:16:30,699 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2019-08-05 10:16:30,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:16:30,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-08-05 10:16:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:16:30,700 INFO L225 Difference]: With dead ends: 4 [2019-08-05 10:16:30,700 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:16:30,700 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:16:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:16:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:16:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:16:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:16:30,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-08-05 10:16:30,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:16:30,702 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:16:30,702 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:16:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:16:30,702 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:16:30,706 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:16:30 BoogieIcfgContainer [2019-08-05 10:16:30,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:16:30,708 INFO L168 Benchmark]: Toolchain (without parser) took 5246.20 ms. Allocated memory was 132.1 MB in the beginning and 195.0 MB in the end (delta: 62.9 MB). Free memory was 107.8 MB in the beginning and 122.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2019-08-05 10:16:30,709 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 132.1 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-08-05 10:16:30,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.69 ms. Allocated memory is still 132.1 MB. Free memory was 107.6 MB in the beginning and 105.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-05 10:16:30,711 INFO L168 Benchmark]: Boogie Preprocessor took 33.30 ms. Allocated memory is still 132.1 MB. Free memory was 105.9 MB in the beginning and 104.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:16:30,712 INFO L168 Benchmark]: RCFGBuilder took 910.31 ms. Allocated memory is still 132.1 MB. Free memory was 104.6 MB in the beginning and 70.5 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:16:30,713 INFO L168 Benchmark]: TraceAbstraction took 4261.38 ms. Allocated memory was 132.1 MB in the beginning and 195.0 MB in the end (delta: 62.9 MB). Free memory was 70.1 MB in the beginning and 122.0 MB in the end (delta: -52.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-08-05 10:16:30,717 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 0.27 ms. Allocated memory is still 132.1 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.69 ms. Allocated memory is still 132.1 MB. Free memory was 107.6 MB in the beginning and 105.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.30 ms. Allocated memory is still 132.1 MB. Free memory was 105.9 MB in the beginning and 104.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 910.31 ms. Allocated memory is still 132.1 MB. Free memory was 104.6 MB in the beginning and 70.5 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4261.38 ms. Allocated memory was 132.1 MB in the beginning and 195.0 MB in the end (delta: 62.9 MB). Free memory was 70.1 MB in the beginning and 122.0 MB in the end (delta: -52.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 314]: 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, 6 locations, 1 error locations. SAFE Result, 4.2s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 15 SDtfs, 14 SDslu, 27 SDs, 0 SdLazy, 86 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 37 ConstructedInterpolants, 4 QuantifiedInterpolants, 4265 SizeOfPredicates, 92 NumberOfNonLiveVariables, 834 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 30/50 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...