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/regression/bpl/Invariant01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:08:33,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:08:33,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:08:33,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:08:33,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:08:33,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:08:33,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:08:33,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:08:33,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:08:33,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:08:33,802 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:08:33,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:08:33,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:08:33,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:08:33,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:08:33,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:08:33,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:08:33,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:08:33,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:08:33,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:08:33,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:08:33,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:08:33,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:08:33,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:08:33,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 11:08:33,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:08:33,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:08:33,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:08:33,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:08:33,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:08:33,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:08:33,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:08:33,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:08:33,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:08:33,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:08:33,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:08:33,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:08:33,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:08:33,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:08:33,909 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:08:33,910 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:08:33,910 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/Invariant01.bpl [2019-08-05 11:08:33,911 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/Invariant01.bpl' [2019-08-05 11:08:33,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:08:33,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:08:33,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:08:33,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:08:33,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:08:33,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:33,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:33,980 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:08:33,980 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:08:33,980 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:08:33,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:08:33,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:08:33,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:08:33,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:08:33,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:33,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:33,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:33,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:34,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:34,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:34,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... [2019-08-05 11:08:34,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:08:34,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:08:34,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:08:34,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:08:34,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-05 11:08:34,078 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2019-08-05 11:08:34,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-05 11:08:34,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-05 11:08:34,280 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:08:34,280 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:08:34,281 INFO L202 PluginConnector]: Adding new model Invariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:08:34 BoogieIcfgContainer [2019-08-05 11:08:34,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:08:34,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:08:34,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:08:34,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:08:34,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:08:33" (1/2) ... [2019-08-05 11:08:34,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52849a89 and model type Invariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:08:34, skipping insertion in model container [2019-08-05 11:08:34,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Invariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:08:34" (2/2) ... [2019-08-05 11:08:34,296 INFO L109 eAbstractionObserver]: Analyzing ICFG Invariant01.bpl [2019-08-05 11:08:34,306 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:08:34,315 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:08:34,333 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:08:34,362 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:08:34,363 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:08:34,363 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:08:34,364 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:08:34,364 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:08:34,364 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:08:34,364 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:08:34,364 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:08:34,365 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:08:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 11:08:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-08-05 11:08:34,386 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:08:34,387 INFO L399 BasicCegarLoop]: trace histogram [1, 1] [2019-08-05 11:08:34,390 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 11:08:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:08:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2019-08-05 11:08:34,450 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:08:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:08:34,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-05 11:08:34,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:08:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:08:34,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:08:34,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-08-05 11:08:34,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:08:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:08:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:08:34,544 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 11:08:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:08:34,646 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 11:08:34,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:08:34,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-08-05 11:08:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:08:34,659 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:08:34,659 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 11:08:34,662 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 11:08:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 11:08:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 5. [2019-08-05 11:08:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 11:08:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 11:08:34,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 2 [2019-08-05 11:08:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:08:34,693 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 11:08:34,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:08:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 11:08:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:08:34,694 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:08:34,694 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:08:34,695 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 11:08:34,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:08:34,695 INFO L82 PathProgramCache]: Analyzing trace with hash 926592, now seen corresponding path program 1 times [2019-08-05 11:08:34,696 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:08:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:08:34,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:08:34,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:08:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:08:34,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:08:34,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2019-08-05 11:08:34,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:08:34,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:08:34,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:08:34,816 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 11:08:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:08:34,929 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 11:08:34,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:08:34,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:08:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:08:34,930 INFO L225 Difference]: With dead ends: 8 [2019-08-05 11:08:34,930 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 11:08:34,932 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:08:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 11:08:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-08-05 11:08:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 11:08:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 11:08:34,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-08-05 11:08:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:08:34,935 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 11:08:34,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:08:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 11:08:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:08:34,936 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:08:34,937 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1] [2019-08-05 11:08:34,937 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 11:08:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:08:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash 890456061, now seen corresponding path program 2 times [2019-08-05 11:08:34,939 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:08:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:08:34,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 11:08:34,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:08:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:08:35,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:08:35,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 11:08:35,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:08:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:08:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:08:35,060 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-08-05 11:08:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:08:35,109 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-08-05 11:08:35,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:08:35,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-05 11:08:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:08:35,112 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:08:35,112 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:08:35,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:08:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:08:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:08:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:08:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-05 11:08:35,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-08-05 11:08:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:08:35,116 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-05 11:08:35,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:08:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-05 11:08:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 11:08:35,117 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:08:35,117 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1] [2019-08-05 11:08:35,117 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONINVARIANTandASSERT]=== [2019-08-05 11:08:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:08:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1029783866, now seen corresponding path program 3 times [2019-08-05 11:08:35,119 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:08:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 11:08:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-08-05 11:08:35,148 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-08-05 11:08:35,165 INFO L202 PluginConnector]: Adding new model Invariant01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:08:35 BoogieIcfgContainer [2019-08-05 11:08:35,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:08:35,168 INFO L168 Benchmark]: Toolchain (without parser) took 1222.79 ms. Allocated memory is still 133.2 MB. Free memory was 110.8 MB in the beginning and 66.0 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:08:35,169 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory is still 111.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:08:35,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.34 ms. Allocated memory is still 133.2 MB. Free memory was 110.8 MB in the beginning and 109.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-05 11:08:35,171 INFO L168 Benchmark]: Boogie Preprocessor took 24.79 ms. Allocated memory is still 133.2 MB. Free memory was 109.0 MB in the beginning and 107.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 11:08:35,172 INFO L168 Benchmark]: RCFGBuilder took 273.27 ms. Allocated memory is still 133.2 MB. Free memory was 107.7 MB in the beginning and 98.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:08:35,173 INFO L168 Benchmark]: TraceAbstraction took 878.51 ms. Allocated memory is still 133.2 MB. Free memory was 98.5 MB in the beginning and 66.0 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2019-08-05 11:08:35,177 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 0.20 ms. Allocated memory is still 133.2 MB. Free memory is still 111.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.34 ms. Allocated memory is still 133.2 MB. Free memory was 110.8 MB in the beginning and 109.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.79 ms. Allocated memory is still 133.2 MB. Free memory was 109.0 MB in the beginning and 107.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.27 ms. Allocated memory is still 133.2 MB. Free memory was 107.7 MB in the beginning and 98.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 878.51 ms. Allocated memory is still 133.2 MB. Free memory was 98.5 MB in the beginning and 66.0 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: loop invariant can be violated and assertion can be violated loop invariant can be violated and assertion can be violated We found a FailurePath: [L11] x := 5; VAL [x=5] [L14] invariant x >= 3; VAL [x=5] [L13] COND TRUE x >= 0 [L16] x := x - 1; VAL [x=4] [L14] invariant x >= 3; VAL [x=4] [L13] COND TRUE x >= 0 [L16] x := x - 1; VAL [x=3] [L14] invariant x >= 3; VAL [x=3] [L13] COND TRUE x >= 0 [L16] x := x - 1; VAL [x=2] [L14] invariant x >= 3; VAL [x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7 SDtfs, 6 SDslu, 0 SDs, 0 SdLazy, 22 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=3, 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 105 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/5 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...