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/half_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ff8eab6 [2018-09-26 08:16:05,928 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 08:16:05,929 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 08:16:05,942 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 08:16:05,942 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 08:16:05,943 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 08:16:05,944 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 08:16:05,946 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 08:16:05,948 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 08:16:05,949 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 08:16:05,949 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 08:16:05,974 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-09-26 08:16:05,984 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 08:16:05,986 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 08:16:05,987 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 08:16:05,987 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-09-26 08:16:05,988 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 08:16:05,988 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-09-26 08:16:05,988 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-09-26 08:16:05,988 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 08:16:06,065 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 08:16:06,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 08:16:06,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 08:16:06,092 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 08:16:06,092 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 08:16:06,093 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl [2018-09-26 08:16:06,093 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/half_2.i_3.bpl' [2018-09-26 08:16:06,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 08:16:06,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 08:16:06,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 08:16:06,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 08:16:06,150 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 08:16:06,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 08:16:06,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 08:16:06,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 08:16:06,192 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 08:16:06,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 08:16:06,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 08:16:06,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 08:16:06,213 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 08:16:06,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/1) ... [2018-09-26 08:16:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 08:16:06,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 08:16:06,453 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 08:16:06,453 INFO L202 PluginConnector]: Adding new model half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:16:06 BoogieIcfgContainer [2018-09-26 08:16:06,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 08:16:06,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 08:16:06,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 08:16:06,459 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 08:16:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:16:06" (1/2) ... [2018-09-26 08:16:06,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b54b573 and model type half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 08:16:06, skipping insertion in model container [2018-09-26 08:16:06,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:16:06" (2/2) ... [2018-09-26 08:16:06,464 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i_3.bpl [2018-09-26 08:16:06,475 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-09-26 08:16:06,482 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 08:16:06,532 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 08:16:06,533 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 08:16:06,533 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 08:16:06,534 INFO L383 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-09-26 08:16:06,534 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 08:16:06,534 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 08:16:06,534 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 08:16:06,535 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 08:16:06,535 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 08:16:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 08:16:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 08:16:06,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:16:06,560 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 08:16:06,562 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:16:06,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:16:06,569 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 08:16:06,576 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:16:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:16:06,665 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 08:16:06,668 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 08:16:06,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 08:16:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 08:16:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 08:16:06,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 08:16:06,688 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 08:16:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:16:06,717 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-09-26 08:16:06,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 08:16:06,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 08:16:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:16:06,731 INFO L225 Difference]: With dead ends: 10 [2018-09-26 08:16:06,732 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 08:16:06,738 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 08:16:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 08:16:06,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 08:16:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 08:16:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 08:16:06,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-26 08:16:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:16:06,782 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 08:16:06,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 08:16:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 08:16:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 08:16:06,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:16:06,783 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-26 08:16:06,784 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:16:06,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:16:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-26 08:16:06,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:16:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:16:06,856 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 08:16:06,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:16:06,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 08:16:06,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 08:16:06,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 08:16:06,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 08:16:06,863 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-26 08:16:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:16:06,898 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 08:16:06,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 08:16:06,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 08:16:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:16:06,900 INFO L225 Difference]: With dead ends: 11 [2018-09-26 08:16:06,900 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 08:16:06,901 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 08:16:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 08:16:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 08:16:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 08:16:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 08:16:06,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-26 08:16:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:16:06,905 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 08:16:06,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 08:16:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 08:16:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 08:16:06,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:16:06,906 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-26 08:16:06,907 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:16:06,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:16:06,907 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-26 08:16:06,907 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:16:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:16:06,954 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 08:16:06,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:16:06,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-26 08:16:06,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 08:16:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 08:16:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:16:06,956 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-26 08:16:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:16:06,985 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 08:16:06,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 08:16:06,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 08:16:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:16:06,987 INFO L225 Difference]: With dead ends: 13 [2018-09-26 08:16:06,987 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 08:16:06,988 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 08:16:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 08:16:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 08:16:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 08:16:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 08:16:06,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-26 08:16:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:16:06,993 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 08:16:06,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 08:16:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 08:16:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 08:16:06,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:16:06,994 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-26 08:16:06,994 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:16:06,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:16:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-26 08:16:06,995 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:16:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:16:07,104 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 08:16:07,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:16:07,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-26 08:16:07,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 08:16:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 08:16:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 08:16:07,112 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-26 08:16:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:16:07,146 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 08:16:07,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 08:16:07,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 08:16:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:16:07,147 INFO L225 Difference]: With dead ends: 11 [2018-09-26 08:16:07,147 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 08:16:07,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-26 08:16:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 08:16:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 08:16:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 08:16:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 08:16:07,149 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-09-26 08:16:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:16:07,150 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 08:16:07,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 08:16:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 08:16:07,150 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 08:16:07,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 08:16:07,257 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 1 52) the Hoare annotation is: false [2018-09-26 08:16:07,257 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 52) the Hoare annotation is: true [2018-09-26 08:16:07,258 INFO L422 ceAbstractionStarter]: At program point L29(lines 29 43) the Hoare annotation is: (or (and (<= 2 ULTIMATE.start_main_~i~5) (<= 1 ULTIMATE.start_main_~n~5) (= ULTIMATE.start_main_~n~5 (+ ULTIMATE.start_main_~k~5 1))) (and (<= 0 ULTIMATE.start_main_~i~5) (<= ULTIMATE.start_main_~i~5 0) (= ULTIMATE.start_main_~n~5 ULTIMATE.start_main_~k~5)) (and (<= (+ ULTIMATE.start_main_~n~5 2) (+ ULTIMATE.start_main_~k~5 ULTIMATE.start_main_~i~5)) (<= 1 ULTIMATE.start_main_~k~5))) [2018-09-26 08:16:07,258 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 52) no Hoare annotation was computed. [2018-09-26 08:16:07,259 INFO L422 ceAbstractionStarter]: At program point L49(lines 26 49) the Hoare annotation is: (or (and (<= 2 ULTIMATE.start_main_~i~5) (<= 1 ULTIMATE.start_main_~n~5) (= ULTIMATE.start_main_~n~5 (+ ULTIMATE.start_main_~k~5 1))) (and (<= 0 ULTIMATE.start_main_~i~5) (<= ULTIMATE.start_main_~i~5 0) (= ULTIMATE.start_main_~n~5 ULTIMATE.start_main_~k~5)) (and (<= (+ ULTIMATE.start_main_~n~5 2) (+ ULTIMATE.start_main_~k~5 ULTIMATE.start_main_~i~5)) (<= 1 ULTIMATE.start_main_~k~5))) [2018-09-26 08:16:07,260 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 51) the Hoare annotation is: false [2018-09-26 08:16:07,260 INFO L422 ceAbstractionStarter]: At program point L42(lines 42 50) the Hoare annotation is: false [2018-09-26 08:16:07,279 INFO L202 PluginConnector]: Adding new model half_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 08:16:07 BoogieIcfgContainer [2018-09-26 08:16:07,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 08:16:07,281 INFO L168 Benchmark]: Toolchain (without parser) took 1134.83 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 08:16:07,283 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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 08:16:07,283 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.03 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 08:16:07,284 INFO L168 Benchmark]: Boogie Preprocessor took 19.95 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 08:16:07,285 INFO L168 Benchmark]: RCFGBuilder took 241.53 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 08:16:07,286 INFO L168 Benchmark]: TraceAbstraction took 824.67 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-09-26 08:16:07,290 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 0.18 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 42.03 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 19.95 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 241.53 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 824.67 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 51]: 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: 42]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((2 <= main_~i~5 && 1 <= main_~n~5) && main_~n~5 == main_~k~5 + 1) || ((0 <= main_~i~5 && main_~i~5 <= 0) && main_~n~5 == main_~k~5)) || (main_~n~5 + 2 <= main_~k~5 + main_~i~5 && 1 <= main_~k~5) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((2 <= main_~i~5 && 1 <= main_~n~5) && main_~n~5 == main_~k~5 + 1) || ((0 <= main_~i~5 && main_~i~5 <= 0) && main_~n~5 == main_~k~5)) || (main_~n~5 + 2 <= main_~k~5 + main_~i~5 && 1 <= main_~k~5) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 26 SDs, 0 SdLazy, 43 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 12 NumberOfFragments, 72 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 936 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 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/half_2.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_08-16-07-305.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/half_2.i_3.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_08-16-07-305.csv Received shutdown request...