java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:19:20,579 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:19:20,581 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:19:20,594 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:19:20,594 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:19:20,595 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:19:20,597 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:19:20,598 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:19:20,600 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:19:20,602 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:19:20,603 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:19:20,603 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:19:20,604 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:19:20,605 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:19:20,606 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:19:20,607 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:19:20,608 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:19:20,610 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:19:20,612 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:19:20,614 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:19:20,616 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:19:20,617 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:19:20,619 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-23 15:19:20,629 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/regression/bpl/AutomizerBpl-nestedInterpolants.epf [2018-07-23 15:19:20,646 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:19:20,646 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:19:20,649 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:19:20,649 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:19:20,649 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:19:20,650 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:19:20,650 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:19:20,650 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:19:20,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:19:20,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:19:20,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:19:20,754 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:19:20,755 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:19:20,756 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl [2018-07-23 15:19:20,756 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl' [2018-07-23 15:19:20,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:19:20,810 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:19:20,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:19:20,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:19:20,811 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:19:20,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:19:20,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:19:20,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:19:20,858 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:19:20,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/1) ... [2018-07-23 15:19:20,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-07-23 15:19:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:19:20,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:19:21,083 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:19:21,084 INFO L202 PluginConnector]: Adding new model half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:21 BoogieIcfgContainer [2018-07-23 15:19:21,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:19:21,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:19:21,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:19:21,089 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:19:21,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:19:20" (1/2) ... [2018-07-23 15:19:21,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13729e0b and model type half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:19:21, skipping insertion in model container [2018-07-23 15:19:21,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:19:21" (2/2) ... [2018-07-23 15:19:21,093 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i_3.bplTransformedIcfg_BEv2_5.bpl [2018-07-23 15:19:21,104 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:19:21,113 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:19:21,168 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:19:21,169 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:19:21,170 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:19:21,170 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:19:21,170 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:19:21,170 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:19:21,171 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:19:21,171 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:19:21,171 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:19:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 15:19:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 15:19:21,202 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,203 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 15:19:21,205 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-07-23 15:19:21,219 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,329 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:19:21,330 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 15:19:21,335 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 15:19:21,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 15:19:21,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 15:19:21,351 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-23 15:19:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,377 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-07-23 15:19:21,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 15:19:21,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 15:19:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,390 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:19:21,390 INFO L226 Difference]: Without dead ends: 5 [2018-07-23 15:19:21,394 INFO L573 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 [2018-07-23 15:19:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-23 15:19:21,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-23 15:19:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 15:19:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 15:19:21,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-23 15:19:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,449 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 15:19:21,449 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 15:19:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 15:19:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:19:21,450 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,450 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:19:21,451 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-07-23 15:19:21,452 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,506 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,507 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:19:21,509 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:19:21,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:19:21,509 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:19:21,510 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-23 15:19:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,540 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-23 15:19:21,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:19:21,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:19:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,542 INFO L225 Difference]: With dead ends: 8 [2018-07-23 15:19:21,542 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 15:19:21,544 INFO L573 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 [2018-07-23 15:19:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 15:19:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 15:19:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 15:19:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 15:19:21,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-23 15:19:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,548 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 15:19:21,548 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:19:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 15:19:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 15:19:21,549 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,549 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 15:19:21,550 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-07-23 15:19:21,550 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,622 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,623 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:19:21,623 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:19:21,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:19:21,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:19:21,624 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-07-23 15:19:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,653 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 15:19:21,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:19:21,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-07-23 15:19:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,654 INFO L225 Difference]: With dead ends: 9 [2018-07-23 15:19:21,654 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 15:19:21,655 INFO L573 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 [2018-07-23 15:19:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 15:19:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 15:19:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:19:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:19:21,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-23 15:19:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,659 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:19:21,659 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:19:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:19:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:19:21,660 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:19:21,660 INFO L353 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-07-23 15:19:21,660 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:19:21,660 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-07-23 15:19:21,661 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:19:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:19:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:19:21,729 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:19:21,729 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:19:21,730 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:19:21,730 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:19:21,730 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:19:21,731 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-23 15:19:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:19:21,765 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-07-23 15:19:21,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:19:21,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-23 15:19:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:19:21,767 INFO L225 Difference]: With dead ends: 7 [2018-07-23 15:19:21,767 INFO L226 Difference]: Without dead ends: 0 [2018-07-23 15:19:21,767 INFO L573 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 [2018-07-23 15:19:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-23 15:19:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-23 15:19:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-23 15:19:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-23 15:19:21,769 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-07-23 15:19:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:19:21,769 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-23 15:19:21,769 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:19:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-23 15:19:21,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-23 15:19:21,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-23 15:19:21,839 INFO L417 ceAbstractionStarter]: At program point L49(lines 49 50) the Hoare annotation is: false [2018-07-23 15:19:21,843 INFO L417 ceAbstractionStarter]: At program point L39(lines 28 40) the Hoare annotation is: (or (and (<= 2 ULTIMATE.start_main_~i~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))) [2018-07-23 15:19:21,843 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 52) the Hoare annotation is: true [2018-07-23 15:19:21,843 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 52) no Hoare annotation was computed. [2018-07-23 15:19:21,844 INFO L417 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 1 52) the Hoare annotation is: false [2018-07-23 15:19:21,844 INFO L417 ceAbstractionStarter]: At program point ULTIMATE.startErr0AssertViolationASSERT(line 51) the Hoare annotation is: false [2018-07-23 15:19:21,862 INFO L202 PluginConnector]: Adding new model half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:19:21 BoogieIcfgContainer [2018-07-23 15:19:21,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:19:21,863 INFO L168 Benchmark]: Toolchain (without parser) took 1053.96 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. [2018-07-23 15:19:21,867 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-07-23 15:19:21,868 INFO L168 Benchmark]: Boogie Preprocessor took 46.12 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. [2018-07-23 15:19:21,871 INFO L168 Benchmark]: RCFGBuilder took 226.36 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. [2018-07-23 15:19:21,872 INFO L168 Benchmark]: TraceAbstraction took 776.86 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. [2018-07-23 15:19:21,878 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 0.21 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 46.12 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 226.36 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 776.86 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: 28]: Loop Invariant Derived loop invariant: ((2 <= main_~i~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: 49]: Loop Invariant Derived loop invariant: false - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 0.6s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 6 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=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: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 8 NumberOfFragments, 35 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 250 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/10 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.bplTransformedIcfg_BEv2_5.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-19-21-893.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-19-21-893.csv Received shutdown request...