java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ff8eab6 [2018-09-26 08:17:11,563 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 08:17:11,565 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 08:17:11,577 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 08:17:11,578 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 08:17:11,579 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 08:17:11,580 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 08:17:11,582 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 08:17:11,583 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 08:17:11,584 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 08:17:11,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 08:17:11,611 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-09-26 08:17:11,630 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 08:17:11,630 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 08:17:11,635 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 08:17:11,635 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-09-26 08:17:11,635 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 08:17:11,636 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-09-26 08:17:11,636 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-09-26 08:17:11,636 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 08:17:11,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 08:17:11,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 08:17:11,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 08:17:11,736 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 08:17:11,736 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 08:17:11,737 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl [2018-09-26 08:17:11,737 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/n.c11.i_3.bpl' [2018-09-26 08:17:11,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 08:17:11,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 08:17:11,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 08:17:11,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 08:17:11,787 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 08:17:11,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 08:17:11,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 08:17:11,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 08:17:11,831 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 08:17:11,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 08:17:11,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 08:17:11,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 08:17:11,852 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 08:17:11,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/1) ... [2018-09-26 08:17:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 08:17:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 08:17:12,098 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 08:17:12,099 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:17:12 BoogieIcfgContainer [2018-09-26 08:17:12,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 08:17:12,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 08:17:12,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 08:17:12,104 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 08:17:12,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:17:11" (1/2) ... [2018-09-26 08:17:12,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403aa597 and model type n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 08:17:12, skipping insertion in model container [2018-09-26 08:17:12,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:17:12" (2/2) ... [2018-09-26 08:17:12,109 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11.i_3.bpl [2018-09-26 08:17:12,120 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-09-26 08:17:12,133 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 08:17:12,180 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 08:17:12,181 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 08:17:12,181 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 08:17:12,182 INFO L383 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-09-26 08:17:12,182 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 08:17:12,182 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 08:17:12,182 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 08:17:12,183 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 08:17:12,183 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 08:17:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 08:17:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 08:17:12,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:17:12,218 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 08:17:12,219 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:17:12,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:17:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 08:17:12,236 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:17:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:17:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:17:12,339 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 08:17:12,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 08:17:12,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 08:17:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 08:17:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 08:17:12,358 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 08:17:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:17:12,394 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-09-26 08:17:12,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 08:17:12,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 08:17:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:17:12,406 INFO L225 Difference]: With dead ends: 10 [2018-09-26 08:17:12,407 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 08:17:12,410 INFO L605 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 [2018-09-26 08:17:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 08:17:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 08:17:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 08:17:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 08:17:12,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 08:17:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:17:12,453 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 08:17:12,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 08:17:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 08:17:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 08:17:12,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:17:12,455 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 08:17:12,455 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:17:12,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:17:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 08:17:12,456 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:17:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:17:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:17:12,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:17:12,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 08:17:12,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 08:17:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 08:17:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 08:17:12,526 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 08:17:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:17:12,557 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 08:17:12,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 08:17:12,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 08:17:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:17:12,563 INFO L225 Difference]: With dead ends: 11 [2018-09-26 08:17:12,563 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 08:17:12,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 08:17:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 08:17:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 08:17:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 08:17:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 08:17:12,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 08:17:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:17:12,569 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 08:17:12,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 08:17:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 08:17:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 08:17:12,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:17:12,570 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 08:17:12,570 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:17:12,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:17:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 08:17:12,571 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:17:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:17:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:17:12,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:17:12,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-26 08:17:12,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 08:17:12,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 08:17:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:17:12,624 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 08:17:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:17:12,656 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 08:17:12,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 08:17:12,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 08:17:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:17:12,657 INFO L225 Difference]: With dead ends: 13 [2018-09-26 08:17:12,657 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 08:17:12,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:17:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 08:17:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 08:17:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 08:17:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 08:17:12,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 08:17:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:17:12,663 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 08:17:12,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 08:17:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 08:17:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 08:17:12,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:17:12,664 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 08:17:12,665 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:17:12,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:17:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 08:17:12,666 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:17:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:17:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:17:12,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:17:12,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-26 08:17:12,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 08:17:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 08:17:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 08:17:12,749 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 08:17:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:17:12,802 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 08:17:12,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 08:17:12,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 08:17:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:17:12,803 INFO L225 Difference]: With dead ends: 15 [2018-09-26 08:17:12,803 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 08:17:12,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 08:17:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 08:17:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 08:17:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 08:17:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 08:17:12,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-26 08:17:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:17:12,816 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 08:17:12,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 08:17:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 08:17:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 08:17:12,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:17:12,817 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-26 08:17:12,817 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:17:12,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:17:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-26 08:17:12,821 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:17:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:17:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:17:12,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:17:12,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-26 08:17:12,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 08:17:12,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 08:17:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 08:17:12,938 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-26 08:17:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:17:12,986 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-09-26 08:17:12,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 08:17:12,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-26 08:17:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:17:12,989 INFO L225 Difference]: With dead ends: 15 [2018-09-26 08:17:12,989 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 08:17:12,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 08:17:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 08:17:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 08:17:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 08:17:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 08:17:12,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-09-26 08:17:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:17:12,994 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 08:17:12,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 08:17:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 08:17:12,994 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 08:17:13,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 08:17:13,089 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 1 43) the Hoare annotation is: false [2018-09-26 08:17:13,089 INFO L422 ceAbstractionStarter]: At program point L31(lines 31 41) the Hoare annotation is: false [2018-09-26 08:17:13,090 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-09-26 08:17:13,090 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-09-26 08:17:13,090 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 42) the Hoare annotation is: false [2018-09-26 08:17:13,091 INFO L422 ceAbstractionStarter]: At program point L20(lines 20 32) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5)) (and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1)) (and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5)) (and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5)) (and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))) [2018-09-26 08:17:13,092 INFO L422 ceAbstractionStarter]: At program point L40(lines 17 40) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~len~5 0) (<= 0 ULTIMATE.start_main_~len~5)) (and (<= 1 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 1)) (and (<= ULTIMATE.start_main_~len~5 3) (<= 3 ULTIMATE.start_main_~len~5)) (and (<= ULTIMATE.start_main_~len~5 2) (<= 2 ULTIMATE.start_main_~len~5)) (and (<= 4 ULTIMATE.start_main_~len~5) (<= ULTIMATE.start_main_~len~5 4))) [2018-09-26 08:17:13,112 INFO L202 PluginConnector]: Adding new model n.c11.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 08:17:13 BoogieIcfgContainer [2018-09-26 08:17:13,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 08:17:13,113 INFO L168 Benchmark]: Toolchain (without parser) took 1330.85 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-09-26 08:17:13,118 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 08:17:13,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 08:17:13,119 INFO L168 Benchmark]: Boogie Preprocessor took 20.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 08:17:13,122 INFO L168 Benchmark]: RCFGBuilder took 248.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-26 08:17:13,123 INFO L168 Benchmark]: TraceAbstraction took 1011.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-26 08:17:13,128 INFO L336 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 0.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 248.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1011.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((main_~len~5 <= 0 && 0 <= main_~len~5) || (1 <= main_~len~5 && main_~len~5 <= 1)) || (main_~len~5 <= 3 && 3 <= main_~len~5)) || (main_~len~5 <= 2 && 2 <= main_~len~5)) || (4 <= main_~len~5 && main_~len~5 <= 4) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: ((((main_~len~5 <= 0 && 0 <= main_~len~5) || (1 <= main_~len~5 && main_~len~5 <= 1)) || (main_~len~5 <= 2 && 2 <= main_~len~5)) || (main_~len~5 <= 3 && 3 <= main_~len~5)) || (4 <= main_~len~5 && main_~len~5 <= 4) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 0 SDslu, 51 SDs, 0 SdLazy, 74 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 16 NumberOfFragments, 76 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 1785 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/n.c11.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_08-17-13-148.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/n.c11.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_08-17-13-148.csv Received shutdown request...