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/InvariantChecking/showcase/2019ProgVerif-Sheet10Ex04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:31:12,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:31:12,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:31:12,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:31:12,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:31:12,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:31:12,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:31:12,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:31:12,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:31:12,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:31:12,536 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:31:12,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:31:12,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:31:12,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:31:12,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:31:12,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:31:12,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:31:12,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:31:12,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:31:12,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:31:12,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:31:12,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:31:12,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:31:12,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:31:12,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:31:12,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:31:12,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:31:12,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:31:12,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:31:12,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:31:12,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:31:12,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:31:12,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:31:12,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:31:12,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:31:12,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:31:12,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:31:12,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:31:12,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:31:12,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:31:12,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:31:12,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:31:12,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:31:12,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:31:12,606 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:31:12,606 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:31:12,607 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/InvariantChecking/showcase/2019ProgVerif-Sheet10Ex04.bpl [2019-08-05 10:31:12,607 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/InvariantChecking/showcase/2019ProgVerif-Sheet10Ex04.bpl' [2019-08-05 10:31:12,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:31:12,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:31:12,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:31:12,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:31:12,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:31:12,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,666 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 10:31:12,667 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 10:31:12,667 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 10:31:12,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:31:12,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:31:12,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:31:12,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:31:12,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/1) ... [2019-08-05 10:31:12,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:31:12,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:31:12,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:31:12,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:31:12,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (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 10:31:12,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 10:31:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 10:31:12,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 10:31:12,840 WARN L731 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-08-05 10:31:13,021 INFO L275 CfgBuilder]: Using library mode [2019-08-05 10:31:13,021 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:31:13,022 INFO L202 PluginConnector]: Adding new model 2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:31:13 BoogieIcfgContainer [2019-08-05 10:31:13,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:31:13,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:31:13,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:31:13,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:31:13,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:31:12" (1/2) ... [2019-08-05 10:31:13,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248afd71 and model type 2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:31:13, skipping insertion in model container [2019-08-05 10:31:13,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:31:13" (2/2) ... [2019-08-05 10:31:13,031 INFO L109 eAbstractionObserver]: Analyzing ICFG 2019ProgVerif-Sheet10Ex04.bpl [2019-08-05 10:31:13,039 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:31:13,047 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-08-05 10:31:13,063 INFO L252 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-08-05 10:31:13,088 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:31:13,089 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:31:13,089 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:31:13,089 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:31:13,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:31:13,090 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:31:13,090 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:31:13,090 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:31:13,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:31:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-08-05 10:31:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-08-05 10:31:13,112 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:31:13,113 INFO L399 BasicCegarLoop]: trace histogram [1, 1] [2019-08-05 10:31:13,115 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr1ENSURES_VIOLATIONPOST_CONDITION, mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 10:31:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:31:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1336, now seen corresponding path program 1 times [2019-08-05 10:31:13,170 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:31:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:31:13,208 WARN L254 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 7 conjunts are in the unsatisfiable core [2019-08-05 10:31:13,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:31:13,283 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 10:31:13,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:31:13,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-08-05 10:31:13,292 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:31:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:31:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:31:13,318 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-08-05 10:31:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:31:13,477 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-08-05 10:31:13,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:31:13,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-08-05 10:31:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:31:13,490 INFO L225 Difference]: With dead ends: 12 [2019-08-05 10:31:13,490 INFO L226 Difference]: Without dead ends: 10 [2019-08-05 10:31:13,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 10:31:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-05 10:31:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 7. [2019-08-05 10:31:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:31:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 10:31:13,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2019-08-05 10:31:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:31:13,527 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 10:31:13,527 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:31:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 10:31:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:31:13,528 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:31:13,528 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:31:13,528 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr1ENSURES_VIOLATIONPOST_CONDITION, mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 10:31:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:31:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1285077, now seen corresponding path program 1 times [2019-08-05 10:31:13,530 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:31:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:31:13,543 WARN L254 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-05 10:31:13,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:31:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:31:13,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:31:13,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 10:31:13,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:31:13,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:31:13,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:31:13,647 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2019-08-05 10:31:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:31:13,682 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:31:13,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:31:13,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-08-05 10:31:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:31:13,683 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:31:13,683 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 10:31:13,684 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:31:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 10:31:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 5. [2019-08-05 10:31:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 10:31:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 10:31:13,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 4 [2019-08-05 10:31:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:31:13,687 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 10:31:13,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:31:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 10:31:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:31:13,688 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:31:13,688 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:31:13,688 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr1ENSURES_VIOLATIONPOST_CONDITION, mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 10:31:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:31:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1285147, now seen corresponding path program 1 times [2019-08-05 10:31:13,690 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:31:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:31:13,697 WARN L254 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:31:13,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:31:13,783 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 10:31:13,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:31:13,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 10:31:13,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:31:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:31:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:31:13,785 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 10:31:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:31:13,869 INFO L93 Difference]: Finished difference Result 4 states and 4 transitions. [2019-08-05 10:31:13,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:31:13,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:31:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:31:13,871 INFO L225 Difference]: With dead ends: 4 [2019-08-05 10:31:13,871 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:31:13,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:31:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:31:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:31:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:31:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:31:13,873 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2019-08-05 10:31:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:31:13,873 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:31:13,874 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:31:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:31:13,874 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:31:13,879 INFO L202 PluginConnector]: Adding new model 2019ProgVerif-Sheet10Ex04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:31:13 BoogieIcfgContainer [2019-08-05 10:31:13,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:31:13,883 INFO L168 Benchmark]: Toolchain (without parser) took 1246.90 ms. Allocated memory is still 141.0 MB. Free memory was 109.4 MB in the beginning and 64.4 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2019-08-05 10:31:13,884 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 110.6 MB in the beginning and 110.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-08-05 10:31:13,885 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.24 ms. Allocated memory is still 141.0 MB. Free memory was 109.4 MB in the beginning and 107.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-08-05 10:31:13,886 INFO L168 Benchmark]: Boogie Preprocessor took 21.16 ms. Allocated memory is still 141.0 MB. Free memory was 107.4 MB in the beginning and 106.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:31:13,887 INFO L168 Benchmark]: RCFGBuilder took 331.50 ms. Allocated memory is still 141.0 MB. Free memory was 106.3 MB in the beginning and 96.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-08-05 10:31:13,888 INFO L168 Benchmark]: TraceAbstraction took 855.69 ms. Allocated memory is still 141.0 MB. Free memory was 96.6 MB in the beginning and 64.4 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. [2019-08-05 10:31:13,892 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 141.0 MB. Free memory was 110.6 MB in the beginning and 110.4 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 34.24 ms. Allocated memory is still 141.0 MB. Free memory was 109.4 MB in the beginning and 107.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.16 ms. Allocated memory is still 141.0 MB. Free memory was 107.4 MB in the beginning and 106.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.50 ms. Allocated memory is still 141.0 MB. Free memory was 106.3 MB in the beginning and 96.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 855.69 ms. Allocated memory is still 141.0 MB. Free memory was 96.6 MB in the beginning and 64.4 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 18]: loop invariant is valid and assertion always holds For all program executions holds that loop invariant is valid and assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4 SDtfs, 7 SDslu, 0 SDs, 0 SdLazy, 21 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 109 SizeOfPredicates, 1 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...