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/nested.c_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-04 21:36:24,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-04 21:36:24,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-04 21:36:24,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-04 21:36:24,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-04 21:36:24,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-04 21:36:24,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-04 21:36:24,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-04 21:36:24,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-04 21:36:24,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-04 21:36:24,704 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-04 21:36:24,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-04 21:36:24,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-04 21:36:24,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-04 21:36:24,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-04 21:36:24,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-04 21:36:24,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-04 21:36:24,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-04 21:36:24,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-04 21:36:24,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-04 21:36:24,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-04 21:36:24,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-04 21:36:24,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-04 21:36:24,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-04 21:36:24,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-04 21:36:24,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-04 21:36:24,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-04 21:36:24,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-04 21:36:24,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-04 21:36:24,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-04 21:36:24,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-04 21:36:24,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-04 21:36:24,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-04 21:36:24,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-04 21:36:24,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-04 21:36:24,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-04 21:36:24,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-04 21:36:24,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-04 21:36:24,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-04 21:36:24,791 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-04 21:36:24,791 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-04 21:36:24,792 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl [2019-08-04 21:36:24,792 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl' [2019-08-04 21:36:24,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-04 21:36:24,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-04 21:36:24,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-04 21:36:24,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-04 21:36:24,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-04 21:36:24,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-04 21:36:24,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-04 21:36:24,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-04 21:36:24,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-04 21:36:24,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/1) ... [2019-08-04 21:36:24,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-04 21:36:24,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-04 21:36:24,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-04 21:36:24,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-04 21:36:24,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (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 [2019-08-04 21:36:24,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-04 21:36:24,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-04 21:36:25,263 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-04 21:36:25,263 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-08-04 21:36:25,264 INFO L202 PluginConnector]: Adding new model nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:25 BoogieIcfgContainer [2019-08-04 21:36:25,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-04 21:36:25,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-04 21:36:25,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-04 21:36:25,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-04 21:36:25,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:36:24" (1/2) ... [2019-08-04 21:36:25,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f771de8 and model type nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:25, skipping insertion in model container [2019-08-04 21:36:25,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:25" (2/2) ... [2019-08-04 21:36:25,273 INFO L109 eAbstractionObserver]: Analyzing ICFG nested.c_4.bpl [2019-08-04 21:36:25,283 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-04 21:36:25,292 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-04 21:36:25,310 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-04 21:36:25,343 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-04 21:36:25,344 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-04 21:36:25,344 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-04 21:36:25,344 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-04 21:36:25,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-04 21:36:25,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-04 21:36:25,345 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-04 21:36:25,345 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-04 21:36:25,345 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-04 21:36:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-04 21:36:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-04 21:36:25,368 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:36:25,369 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-04 21:36:25,371 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:36:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:36:25,377 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2019-08-04 21:36:25,426 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:36:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:36:25,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2019-08-04 21:36:25,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:36:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:36:25,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-04 21:36:25,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-04 21:36:25,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-04 21:36:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-04 21:36:25,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-04 21:36:25,542 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-04 21:36:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:36:25,587 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-04 21:36:25,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-04 21:36:25,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-04 21:36:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:36:25,607 INFO L225 Difference]: With dead ends: 5 [2019-08-04 21:36:25,608 INFO L226 Difference]: Without dead ends: 5 [2019-08-04 21:36:25,613 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 [2019-08-04 21:36:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-04 21:36:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-04 21:36:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-04 21:36:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-04 21:36:25,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-04 21:36:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:36:25,688 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-04 21:36:25,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-04 21:36:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-04 21:36:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-04 21:36:25,692 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:36:25,692 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-04 21:36:25,693 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:36:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:36:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2019-08-04 21:36:25,703 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:36:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:36:25,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-04 21:36:25,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:36:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:36:25,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:36:25,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-04 21:36:25,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:36:25,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:36:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:36:25,940 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-04 21:36:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:36:26,041 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-04 21:36:26,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:36:26,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-04 21:36:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:36:26,045 INFO L225 Difference]: With dead ends: 6 [2019-08-04 21:36:26,045 INFO L226 Difference]: Without dead ends: 6 [2019-08-04 21:36:26,046 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 [2019-08-04 21:36:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-04 21:36:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-04 21:36:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-04 21:36:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-04 21:36:26,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-04 21:36:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:36:26,050 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-04 21:36:26,050 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:36:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-04 21:36:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-04 21:36:26,051 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:36:26,052 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-04 21:36:26,052 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:36:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:36:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2019-08-04 21:36:26,053 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:36:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:36:26,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-04 21:36:26,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:36:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:36:26,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:36:26,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-04 21:36:26,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-04 21:36:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-04 21:36:26,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:36:26,247 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-04 21:36:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:36:26,290 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-04 21:36:26,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-04 21:36:26,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-04 21:36:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:36:26,302 INFO L225 Difference]: With dead ends: 7 [2019-08-04 21:36:26,302 INFO L226 Difference]: Without dead ends: 7 [2019-08-04 21:36:26,303 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:36:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-04 21:36:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-04 21:36:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-04 21:36:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-04 21:36:26,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-04 21:36:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:36:26,306 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-04 21:36:26,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-04 21:36:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-04 21:36:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-04 21:36:26,307 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:36:26,307 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-04 21:36:26,308 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:36:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:36:26,308 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2019-08-04 21:36:26,309 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:36:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:36:26,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-04 21:36:26,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:36:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-08-04 21:36:26,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:36:26,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-04 21:36:26,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:36:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:36:26,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:36:26,426 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2019-08-04 21:36:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:36:26,445 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-04 21:36:26,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:36:26,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-08-04 21:36:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:36:26,446 INFO L225 Difference]: With dead ends: 5 [2019-08-04 21:36:26,446 INFO L226 Difference]: Without dead ends: 0 [2019-08-04 21:36:26,447 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:36:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-04 21:36:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-04 21:36:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-04 21:36:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-04 21:36:26,461 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2019-08-04 21:36:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:36:26,462 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-04 21:36:26,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:36:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-04 21:36:26,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-04 21:36:26,467 INFO L202 PluginConnector]: Adding new model nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:36:26 BoogieIcfgContainer [2019-08-04 21:36:26,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-04 21:36:26,471 INFO L168 Benchmark]: Toolchain (without parser) took 1641.23 ms. Allocated memory was 141.6 MB in the beginning and 175.6 MB in the end (delta: 34.1 MB). Free memory was 109.9 MB in the beginning and 147.1 MB in the end (delta: -37.2 MB). Peak memory consumption was 58.1 MB. Max. memory is 7.1 GB. [2019-08-04 21:36:26,472 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 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. [2019-08-04 21:36:26,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 141.6 MB. Free memory was 109.7 MB in the beginning and 108.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-08-04 21:36:26,474 INFO L168 Benchmark]: Boogie Preprocessor took 26.16 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. [2019-08-04 21:36:26,475 INFO L168 Benchmark]: RCFGBuilder took 367.94 ms. Allocated memory is still 141.6 MB. Free memory was 107.0 MB in the beginning and 96.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-08-04 21:36:26,476 INFO L168 Benchmark]: TraceAbstraction took 1201.71 ms. Allocated memory was 141.6 MB in the beginning and 175.6 MB in the end (delta: 34.1 MB). Free memory was 96.7 MB in the beginning and 147.1 MB in the end (delta: -50.4 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2019-08-04 21:36:26,481 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 0.22 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 41.22 ms. Allocated memory is still 141.6 MB. Free memory was 109.7 MB in the beginning and 108.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.16 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 367.94 ms. Allocated memory is still 141.6 MB. Free memory was 107.0 MB in the beginning and 96.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1201.71 ms. Allocated memory was 141.6 MB in the beginning and 175.6 MB in the end (delta: 34.1 MB). Free memory was 96.7 MB in the beginning and 147.1 MB in the end (delta: -50.4 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 63]: 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, 5 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 4 SDs, 0 SdLazy, 18 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 5 NumberOfNonLiveVariables, 174 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 3/10 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...