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/real-life/RailwayCrossing-Incorrenct.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:07:49,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:07:49,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:07:49,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:07:49,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:07:49,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:07:49,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:07:49,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:07:49,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:07:49,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:07:49,202 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:07:49,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:07:49,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:07:49,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:07:49,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:07:49,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:07:49,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:07:49,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:07:49,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:07:49,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:07:49,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:07:49,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:07:49,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:07:49,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:07:49,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:07:49,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:07:49,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:07:49,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:07:49,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:07:49,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:07:49,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:07:49,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:07:49,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:07:49,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:07:49,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:07:49,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:07:49,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:07:49,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:07:49,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:07:49,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:07:49,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:07:49,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:07:49,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:07:49,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:07:49,296 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:07:49,297 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:07:49,298 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing-Incorrenct.bpl [2019-08-05 10:07:49,298 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing-Incorrenct.bpl' [2019-08-05 10:07:49,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:07:49,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:07:49,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:07:49,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:07:49,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:07:49,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,366 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 10:07:49,366 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 10:07:49,367 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 10:07:49,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:07:49,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:07:49,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:07:49,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:07:49,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/1) ... [2019-08-05 10:07:49,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:07:49,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:07:49,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:07:49,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:07:49,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (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 10:07:49,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2019-08-05 10:07:49,455 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2019-08-05 10:07:49,455 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2019-08-05 10:07:49,876 INFO L275 CfgBuilder]: Using library mode [2019-08-05 10:07:49,876 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:07:49,877 INFO L202 PluginConnector]: Adding new model RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:07:49 BoogieIcfgContainer [2019-08-05 10:07:49,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:07:49,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:07:49,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:07:49,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:07:49,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:07:49" (1/2) ... [2019-08-05 10:07:49,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac91f72 and model type RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:07:49, skipping insertion in model container [2019-08-05 10:07:49,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:07:49" (2/2) ... [2019-08-05 10:07:49,885 INFO L109 eAbstractionObserver]: Analyzing ICFG RailwayCrossing-Incorrenct.bpl [2019-08-05 10:07:49,895 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:07:49,914 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:07:49,946 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:07:49,972 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:07:49,973 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:07:49,973 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:07:49,973 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:07:49,973 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:07:49,974 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:07:49,974 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:07:49,974 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:07:49,974 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:07:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 10:07:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 10:07:49,996 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:07:49,997 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 10:07:49,999 INFO L418 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:07:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:07:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2019-08-05 10:07:50,051 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:07:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:07:50,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:07:50,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:07:50,202 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 10:07:50,206 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:07:50,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 10:07:50,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:07:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:07:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:07:50,228 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 10:07:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:07:50,276 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:07:50,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:07:50,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 10:07:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:07:50,287 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:07:50,287 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 10:07:50,289 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:07:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 10:07:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 10:07:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 10:07:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 10:07:50,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 10:07:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:07:50,321 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 10:07:50,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:07:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 10:07:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:07:50,322 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:07:50,322 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:07:50,323 INFO L418 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:07:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:07:50,323 INFO L82 PathProgramCache]: Analyzing trace with hash 955939, now seen corresponding path program 1 times [2019-08-05 10:07:50,324 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:07:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:07:50,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:07:50,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:07:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:07:50,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:07:50,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:07:50,494 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:07:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:07:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:07:50,495 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 10:07:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:07:50,546 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:07:50,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:07:50,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:07:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:07:50,550 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:07:50,550 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 10:07:50,551 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 10:07:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 10:07:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 10:07:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 10:07:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 10:07:50,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 10:07:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:07:50,553 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 10:07:50,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:07:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 10:07:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 10:07:50,554 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:07:50,554 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 10:07:50,555 INFO L418 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:07:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:07:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash 29644672, now seen corresponding path program 2 times [2019-08-05 10:07:50,556 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:07:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 10:07:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 10:07:50,627 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-08-05 10:07:50,648 INFO L202 PluginConnector]: Adding new model RailwayCrossing-Incorrenct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:07:50 BoogieIcfgContainer [2019-08-05 10:07:50,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:07:50,651 INFO L168 Benchmark]: Toolchain (without parser) took 1315.15 ms. Allocated memory is still 141.6 MB. Free memory was 110.0 MB in the beginning and 62.6 MB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:07:50,667 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 111.2 MB in the beginning and 111.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-08-05 10:07:50,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.42 ms. Allocated memory is still 141.6 MB. Free memory was 110.0 MB in the beginning and 108.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-08-05 10:07:50,670 INFO L168 Benchmark]: Boogie Preprocessor took 20.92 ms. Allocated memory is still 141.6 MB. Free memory was 108.1 MB in the beginning and 107.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:07:50,671 INFO L168 Benchmark]: RCFGBuilder took 487.12 ms. Allocated memory is still 141.6 MB. Free memory was 106.8 MB in the beginning and 93.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-08-05 10:07:50,672 INFO L168 Benchmark]: TraceAbstraction took 769.46 ms. Allocated memory is still 141.6 MB. Free memory was 92.7 MB in the beginning and 62.6 MB in the end (delta: 30.1 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:07:50,679 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 141.6 MB. Free memory was 111.2 MB in the beginning and 111.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 33.42 ms. Allocated memory is still 141.6 MB. Free memory was 110.0 MB in the beginning and 108.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.92 ms. Allocated memory is still 141.6 MB. Free memory was 108.1 MB in the beginning and 107.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 487.12 ms. Allocated memory is still 141.6 MB. Free memory was 106.8 MB in the beginning and 93.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 769.46 ms. Allocated memory is still 141.6 MB. Free memory was 92.7 MB in the beginning and 62.6 MB in the end (delta: 30.1 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: assertion can be violated assertion can be violated We found a FailurePath: [L16] gate := 0; [L17] time := 0; [L19] one := 1; [L20] hundred := 100 * one; [L21] thousand := 1000 * one; [L22] alarmTrain := false; VAL [alarmTrain=false, gate=0, hundred=100, one=1, thousand=1000, time=0] [L25] COND TRUE time < thousand [L27] COND FALSE !(gateMotorFailure) [L30] COND TRUE gate < hundred [L31] gate := gate + 1; [L34] havoc increment; [L35] assume increment < 1000; [L36] time := time + increment; VAL [alarmTrain=false, gate=1, gateMotorFailure=false, hundred=100, increment=1, one=1, thousand=1000, time=1] [L25] COND TRUE time < thousand [L27] COND FALSE !(gateMotorFailure) [L30] COND TRUE gate < hundred [L31] gate := gate + 1; [L34] havoc increment; [L35] assume increment < 1000; [L36] time := time + increment; VAL [alarmTrain=false, gate=2, gateMotorFailure=false, hundred=100, increment=999, one=1, thousand=1000, time=1000] [L25] COND FALSE !(time < thousand) VAL [alarmTrain=false, gate=2, gateMotorFailure=false, hundred=100, increment=999, one=1, thousand=1000, time=1000] [L39] assert alarmTrain || gate == hundred; VAL [alarmTrain=false, gate=2, gateMotorFailure=false, hundred=100, increment=999, one=1, thousand=1000, time=1000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. UNSAFE Result, 0.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7 SDtfs, 0 SDslu, 4 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 5 ConstructedInterpolants, 3 QuantifiedInterpolants, 117 SizeOfPredicates, 7 NumberOfNonLiveVariables, 38 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...