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/20170319-ConjunctivePathPrograms/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ff8eab6 [2018-09-26 08:10:38,709 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 08:10:38,711 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 08:10:38,723 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 08:10:38,724 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 08:10:38,725 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 08:10:38,726 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 08:10:38,728 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 08:10:38,730 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 08:10:38,731 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 08:10:38,733 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 08:10:38,762 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/Pdr/AutomizerBpl-nestedInterpolants.epf [2018-09-26 08:10:38,774 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 08:10:38,774 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 08:10:38,779 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 08:10:38,780 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-09-26 08:10:38,780 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 08:10:38,780 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-09-26 08:10:38,780 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-09-26 08:10:38,781 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 08:10:38,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 08:10:38,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 08:10:38,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 08:10:38,875 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 08:10:38,876 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 08:10:38,877 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 08:10:38,877 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl' [2018-09-26 08:10:38,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 08:10:38,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 08:10:38,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 08:10:38,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 08:10:38,937 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 08:10:38,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:38,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:38,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 08:10:38,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 08:10:38,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 08:10:38,981 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 08:10:38,994 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:38,994 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:38,995 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:38,996 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:38,999 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:39,003 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:39,004 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:39,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 08:10:39,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 08:10:39,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 08:10:39,007 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 08:10:39,010 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 26.09 08:10:38" (1/1) ... [2018-09-26 08:10:39,106 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 08:10:39,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 08:10:39,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 08:10:39,268 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 08:10:39,269 INFO L202 PluginConnector]: Adding new model half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 08:10:39 BoogieIcfgContainer [2018-09-26 08:10:39,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 08:10:39,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 08:10:39,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 08:10:39,275 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 08:10:39,275 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 26.09 08:10:38" (1/2) ... [2018-09-26 08:10:39,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6778a8a8 and model type half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 08:10:39, skipping insertion in model container [2018-09-26 08:10:39,277 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 26.09 08:10:39" (2/2) ... [2018-09-26 08:10:39,279 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i_3.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 08:10:39,291 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-09-26 08:10:39,300 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 08:10:39,349 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 08:10:39,350 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 08:10:39,350 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 08:10:39,350 INFO L383 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-09-26 08:10:39,351 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 08:10:39,351 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 08:10:39,351 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 08:10:39,351 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 08:10:39,352 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 08:10:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 08:10:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 08:10:39,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:10:39,378 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 08:10:39,379 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:10:39,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:10:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-26 08:10:39,395 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:10:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:10:39,497 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 08:10:39,499 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 08:10:39,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 08:10:39,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 08:10:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 08:10:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 08:10:39,520 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 08:10:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:10:39,552 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-09-26 08:10:39,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 08:10:39,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 08:10:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:10:39,566 INFO L225 Difference]: With dead ends: 8 [2018-09-26 08:10:39,566 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 08:10:39,576 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 08:10:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 08:10:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 08:10:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 08:10:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 08:10:39,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 08:10:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:10:39,619 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 08:10:39,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 08:10:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 08:10:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 08:10:39,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:10:39,620 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 08:10:39,621 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:10:39,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:10:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-26 08:10:39,622 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:10:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:10:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:10:39,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:10:39,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-26 08:10:39,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 08:10:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 08:10:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 08:10:39,671 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-26 08:10:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:10:39,691 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 08:10:39,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 08:10:39,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-26 08:10:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:10:39,693 INFO L225 Difference]: With dead ends: 8 [2018-09-26 08:10:39,693 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 08:10:39,694 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 08:10:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 08:10:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 08:10:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 08:10:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 08:10:39,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 08:10:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:10:39,697 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 08:10:39,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 08:10:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 08:10:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 08:10:39,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:10:39,698 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 08:10:39,699 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:10:39,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:10:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-26 08:10:39,699 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:10:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:10:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 08:10:39,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:10:39,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-26 08:10:39,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 08:10:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 08:10:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 08:10:39,747 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-26 08:10:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:10:39,772 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 08:10:39,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 08:10:39,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-26 08:10:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:10:39,773 INFO L225 Difference]: With dead ends: 9 [2018-09-26 08:10:39,773 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 08:10:39,774 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 08:10:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 08:10:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 08:10:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 08:10:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 08:10:39,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 08:10:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:10:39,778 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 08:10:39,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 08:10:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 08:10:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 08:10:39,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 08:10:39,779 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-26 08:10:39,779 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 08:10:39,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 08:10:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-26 08:10:39,780 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-09-26 08:10:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 08:10:39,872 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 08:10:39,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-26 08:10:39,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-26 08:10:39,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 08:10:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 08:10:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 08:10:39,875 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-26 08:10:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 08:10:39,939 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-26 08:10:39,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 08:10:39,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-26 08:10:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 08:10:39,942 INFO L225 Difference]: With dead ends: 7 [2018-09-26 08:10:39,942 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 08:10:39,946 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 08:10:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 08:10:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 08:10:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 08:10:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 08:10:39,947 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2018-09-26 08:10:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 08:10:39,947 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 08:10:39,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 08:10:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 08:10:39,950 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 08:10:39,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 08:10:40,066 INFO L422 ceAbstractionStarter]: At program point L49(lines 49 50) the Hoare annotation is: false [2018-09-26 08:10:40,067 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 1 52) the Hoare annotation is: false [2018-09-26 08:10:40,067 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 52) the Hoare annotation is: true [2018-09-26 08:10:40,067 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 52) no Hoare annotation was computed. [2018-09-26 08:10:40,068 INFO L422 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))) [2018-09-26 08:10:40,068 INFO L422 ceAbstractionStarter]: At program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 51) the Hoare annotation is: false [2018-09-26 08:10:40,085 INFO L202 PluginConnector]: Adding new model half_2.i_3.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 08:10:40 BoogieIcfgContainer [2018-09-26 08:10:40,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 08:10:40,086 INFO L168 Benchmark]: Toolchain (without parser) took 1154.08 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 08:10:40,088 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 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 08:10:40,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.30 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 08:10:40,090 INFO L168 Benchmark]: Boogie Preprocessor took 25.30 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 08:10:40,090 INFO L168 Benchmark]: RCFGBuilder took 263.08 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 08:10:40,091 INFO L168 Benchmark]: TraceAbstraction took 814.31 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 08:10:40,096 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 0.25 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 44.30 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 25.30 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 263.08 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 814.31 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: 49]: Loop Invariant Derived loop invariant: false - 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) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s 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_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_08-10-40-116.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/half_2.i_3.bplTransformedIcfg_BEv2_5.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_08-10-40-116.csv Received shutdown request...