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/num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-935f392 [2018-07-23 13:41:23,993 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 13:41:23,995 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 13:41:24,008 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 13:41:24,009 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 13:41:24,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 13:41:24,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 13:41:24,015 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 13:41:24,018 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 13:41:24,019 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 13:41:24,020 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 13:41:24,020 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 13:41:24,021 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 13:41:24,022 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 13:41:24,028 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 13:41:24,029 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 13:41:24,030 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 13:41:24,031 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 13:41:24,033 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 13:41:24,035 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 13:41:24,036 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 13:41:24,037 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 13:41:24,039 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 13:41:24,039 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 13:41:24,039 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 13:41:24,040 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 13:41:24,041 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 13:41:24,042 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 13:41:24,043 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 13:41:24,044 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 13:41:24,044 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 13:41:24,044 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-23 13:41:24,045 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-23 13:41:24,045 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-23 13:41:24,046 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-23 13:41:24,046 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-23 13:41:24,047 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 13:41:24,061 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 13:41:24,061 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 13:41:24,062 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 13:41:24,062 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 13:41:24,063 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 13:41:24,063 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 13:41:24,063 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 13:41:24,063 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 13:41:24,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 13:41:24,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 13:41:24,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 13:41:24,136 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 13:41:24,137 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 13:41:24,138 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl [2018-07-23 13:41:24,138 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl' [2018-07-23 13:41:24,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 13:41:24,206 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 13:41:24,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 13:41:24,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 13:41:24,207 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 13:41:24,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 13:41:24,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 13:41:24,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 13:41:24,261 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 13:41:24,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/1) ... [2018-07-23 13:41:24,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-07-23 13:41:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 13:41:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 13:41:24,537 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 13:41:24,538 INFO L202 PluginConnector]: Adding new model num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:41:24 BoogieIcfgContainer [2018-07-23 13:41:24,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 13:41:24,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 13:41:24,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 13:41:24,543 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 13:41:24,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 01:41:24" (1/2) ... [2018-07-23 13:41:24,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5512d14d and model type num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:41:24, skipping insertion in model container [2018-07-23 13:41:24,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:41:24" (2/2) ... [2018-07-23 13:41:24,548 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl [2018-07-23 13:41:24,558 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 13:41:24,565 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 13:41:24,613 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 13:41:24,614 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 13:41:24,615 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 13:41:24,615 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 13:41:24,615 INFO L376 AbstractCegarLoop]: Backedges is CANONICAL [2018-07-23 13:41:24,615 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 13:41:24,615 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 13:41:24,616 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 13:41:24,616 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 13:41:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-07-23 13:41:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-07-23 13:41:24,641 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:24,642 INFO L357 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-07-23 13:41:24,642 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-07-23 13:41:24,655 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:24,721 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 13:41:24,724 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 13:41:24,724 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-23 13:41:24,726 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:24,727 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 13:41:24,727 INFO L185 omatonBuilderFactory]: Interpolants [8#true, 9#false, 10#(<= ULTIMATE.start_main_~y~5 0)] [2018-07-23 13:41:24,728 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 13:41:24,729 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-23 13:41:24,742 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-23 13:41:24,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-23 13:41:24,745 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-07-23 13:41:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:24,775 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-07-23 13:41:24,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-23 13:41:24,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-07-23 13:41:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:24,787 INFO L225 Difference]: With dead ends: 8 [2018-07-23 13:41:24,787 INFO L226 Difference]: Without dead ends: 5 [2018-07-23 13:41:24,791 INFO L575 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 13:41:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-07-23 13:41:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-07-23 13:41:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-07-23 13:41:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-07-23 13:41:24,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-07-23 13:41:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:24,834 INFO L471 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-07-23 13:41:24,834 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-23 13:41:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-07-23 13:41:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 13:41:24,836 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:24,836 INFO L357 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 13:41:24,836 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-07-23 13:41:24,837 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:24,870 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 13:41:24,871 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:24,871 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 13:41:24,871 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:24,872 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 13:41:24,873 INFO L185 omatonBuilderFactory]: Interpolants [37#true, 38#false, 39#(<= ULTIMATE.start_main_~y~5 0), 40#(<= ULTIMATE.start_main_~y~5 255)] [2018-07-23 13:41:24,873 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 13:41:24,876 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 13:41:24,876 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 13:41:24,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 13:41:24,878 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-07-23 13:41:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:24,915 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-07-23 13:41:24,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 13:41:24,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 13:41:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:24,917 INFO L225 Difference]: With dead ends: 8 [2018-07-23 13:41:24,917 INFO L226 Difference]: Without dead ends: 6 [2018-07-23 13:41:24,918 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-23 13:41:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-07-23 13:41:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-07-23 13:41:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-07-23 13:41:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-07-23 13:41:24,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-07-23 13:41:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:24,921 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-07-23 13:41:24,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 13:41:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-07-23 13:41:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-07-23 13:41:24,922 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:24,923 INFO L357 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-07-23 13:41:24,923 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-07-23 13:41:24,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:24,986 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 13:41:24,987 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:24,987 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 13:41:24,987 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:24,987 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 13:41:24,987 INFO L185 omatonBuilderFactory]: Interpolants [69#true, 70#false, 71#(<= ULTIMATE.start_main_~c~5 0), 72#(<= ULTIMATE.start_main_~c~5 1), 73#(<= ULTIMATE.start_main_~c~5 2)] [2018-07-23 13:41:24,988 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 13:41:24,988 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 13:41:24,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 13:41:24,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 13:41:24,989 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-07-23 13:41:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:25,030 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-07-23 13:41:25,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 13:41:25,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-07-23 13:41:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:25,032 INFO L225 Difference]: With dead ends: 9 [2018-07-23 13:41:25,032 INFO L226 Difference]: Without dead ends: 7 [2018-07-23 13:41:25,033 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-23 13:41:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-07-23 13:41:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-07-23 13:41:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 13:41:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 13:41:25,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-07-23 13:41:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:25,037 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 13:41:25,037 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 13:41:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 13:41:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 13:41:25,037 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:25,038 INFO L357 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-07-23 13:41:25,038 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-07-23 13:41:25,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:25,080 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 13:41:25,080 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:25,080 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 13:41:25,081 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:25,081 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 13:41:25,083 INFO L185 omatonBuilderFactory]: Interpolants [106#true, 107#false, 108#(<= ULTIMATE.start_main_~c~5 0), 109#(<= ULTIMATE.start_main_~c~5 1), 110#(<= ULTIMATE.start_main_~c~5 2), 111#(<= ULTIMATE.start_main_~c~5 3)] [2018-07-23 13:41:25,083 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 13:41:25,084 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 13:41:25,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 13:41:25,087 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 13:41:25,088 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-07-23 13:41:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:25,111 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-07-23 13:41:25,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 13:41:25,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-07-23 13:41:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:25,112 INFO L225 Difference]: With dead ends: 10 [2018-07-23 13:41:25,112 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 13:41:25,113 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-07-23 13:41:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 13:41:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-07-23 13:41:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-07-23 13:41:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-07-23 13:41:25,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-07-23 13:41:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:25,116 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-07-23 13:41:25,116 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 13:41:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-07-23 13:41:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-07-23 13:41:25,117 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:25,117 INFO L357 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-07-23 13:41:25,117 INFO L414 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:25,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-07-23 13:41:25,118 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,184 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:25,184 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 13:41:25,184 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:25,184 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 13:41:25,185 INFO L185 omatonBuilderFactory]: Interpolants [148#true, 149#false, 150#(<= ULTIMATE.start_main_~c~5 0), 151#(<= ULTIMATE.start_main_~c~5 1), 152#(<= ULTIMATE.start_main_~c~5 2), 153#(<= ULTIMATE.start_main_~c~5 3), 154#(<= ULTIMATE.start_main_~c~5 4)] [2018-07-23 13:41:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,185 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 13:41:25,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 13:41:25,186 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 13:41:25,186 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-07-23 13:41:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:25,202 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 13:41:25,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 13:41:25,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-07-23 13:41:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:25,204 INFO L225 Difference]: With dead ends: 11 [2018-07-23 13:41:25,204 INFO L226 Difference]: Without dead ends: 9 [2018-07-23 13:41:25,204 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-07-23 13:41:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-07-23 13:41:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-07-23 13:41:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 13:41:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 13:41:25,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-07-23 13:41:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:25,208 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 13:41:25,208 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 13:41:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 13:41:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 13:41:25,209 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:25,209 INFO L357 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-07-23 13:41:25,209 INFO L414 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-07-23 13:41:25,210 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,291 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:25,292 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-07-23 13:41:25,292 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:25,292 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 13:41:25,293 INFO L185 omatonBuilderFactory]: Interpolants [195#true, 196#false, 197#(<= ULTIMATE.start_main_~c~5 0), 198#(<= ULTIMATE.start_main_~c~5 1), 199#(<= ULTIMATE.start_main_~c~5 2), 200#(<= ULTIMATE.start_main_~c~5 3), 201#(<= ULTIMATE.start_main_~c~5 4), 202#(<= ULTIMATE.start_main_~c~5 5)] [2018-07-23 13:41:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,293 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-23 13:41:25,293 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-23 13:41:25,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 13:41:25,294 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-07-23 13:41:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:25,311 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 13:41:25,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-23 13:41:25,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-07-23 13:41:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:25,312 INFO L225 Difference]: With dead ends: 12 [2018-07-23 13:41:25,313 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 13:41:25,313 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-07-23 13:41:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 13:41:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-07-23 13:41:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-07-23 13:41:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-07-23 13:41:25,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-07-23 13:41:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:25,317 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-07-23 13:41:25,317 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-23 13:41:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-07-23 13:41:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-07-23 13:41:25,318 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:25,318 INFO L357 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-07-23 13:41:25,319 INFO L414 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-07-23 13:41:25,319 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,364 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:25,364 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-07-23 13:41:25,365 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:25,365 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 13:41:25,365 INFO L185 omatonBuilderFactory]: Interpolants [247#true, 248#false, 249#(<= ULTIMATE.start_main_~c~5 0), 250#(<= ULTIMATE.start_main_~c~5 1), 251#(<= ULTIMATE.start_main_~c~5 2), 252#(<= ULTIMATE.start_main_~c~5 3), 253#(<= ULTIMATE.start_main_~c~5 4), 254#(<= ULTIMATE.start_main_~c~5 5), 255#(<= ULTIMATE.start_main_~c~5 6)] [2018-07-23 13:41:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,366 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-23 13:41:25,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-23 13:41:25,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 13:41:25,367 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-07-23 13:41:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:25,385 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 13:41:25,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-23 13:41:25,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-07-23 13:41:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:25,386 INFO L225 Difference]: With dead ends: 13 [2018-07-23 13:41:25,386 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 13:41:25,387 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-07-23 13:41:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 13:41:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 13:41:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 13:41:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 13:41:25,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-07-23 13:41:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:25,391 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 13:41:25,391 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-23 13:41:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 13:41:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 13:41:25,392 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:25,392 INFO L357 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-07-23 13:41:25,393 INFO L414 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:25,393 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-07-23 13:41:25,393 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 13:41:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,469 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 13:41:25,469 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-07-23 13:41:25,470 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-07-23 13:41:25,470 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 13:41:25,470 INFO L185 omatonBuilderFactory]: Interpolants [304#true, 305#false, 306#(<= ULTIMATE.start_main_~c~5 0), 307#(<= ULTIMATE.start_main_~c~5 1), 308#(<= ULTIMATE.start_main_~c~5 2), 309#(<= ULTIMATE.start_main_~c~5 3), 310#(<= ULTIMATE.start_main_~c~5 4), 311#(<= ULTIMATE.start_main_~c~5 5), 312#(<= ULTIMATE.start_main_~c~5 6), 313#(<= ULTIMATE.start_main_~c~5 7)] [2018-07-23 13:41:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 13:41:25,471 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-23 13:41:25,471 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-23 13:41:25,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 13:41:25,474 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-07-23 13:41:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 13:41:25,496 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 13:41:25,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-23 13:41:25,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-07-23 13:41:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 13:41:25,498 INFO L225 Difference]: With dead ends: 14 [2018-07-23 13:41:25,498 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 13:41:25,498 INFO L575 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-07-23 13:41:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 13:41:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-23 13:41:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-23 13:41:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-23 13:41:25,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-23 13:41:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 13:41:25,504 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-23 13:41:25,505 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-23 13:41:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-23 13:41:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-23 13:41:25,505 INFO L349 BasicCegarLoop]: Found error trace [2018-07-23 13:41:25,506 INFO L357 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-07-23 13:41:25,506 INFO L414 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 13:41:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-07-23 13:41:25,511 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 13:41:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-23 13:41:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-23 13:41:25,581 INFO L423 BasicCegarLoop]: Counterexample might be feasible [2018-07-23 13:41:25,603 INFO L202 PluginConnector]: Adding new model num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 01:41:25 BoogieIcfgContainer [2018-07-23 13:41:25,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 13:41:25,605 INFO L168 Benchmark]: Toolchain (without parser) took 1399.82 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-07-23 13:41:25,607 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 13:41:25,608 INFO L168 Benchmark]: Boogie Preprocessor took 53.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 13:41:25,609 INFO L168 Benchmark]: RCFGBuilder took 277.96 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-23 13:41:25,610 INFO L168 Benchmark]: TraceAbstraction took 1064.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-07-23 13:41:25,615 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 53.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 277.96 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1064.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 47]: assertion can be violated assertion can be violated We found a FailurePath: [L15] havoc main_#res; [L16] havoc main_#t~nondet0, main_~i~6, main_~bit~6, main_~c~5, main_~x~5, main_~y~5; [L17] main_~x~5 := main_#t~nondet0; [L18] havoc main_#t~nondet0; [L19] havoc main_~y~5; [L20] havoc main_~c~5; [L21] main_~y~5 := 0; [L22] main_~c~5 := 0; VAL [main_~c~5=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=1, main_~i~6=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=2, main_~i~6=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=3, main_~i~6=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=4, main_~i~6=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=5, main_~i~6=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=6, main_~i~6=0, main_~y~5=0] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=7, main_~i~6=1, main_~y~5=1] [L37] assume 0 <= main_~c~5 && main_~c~5 < 8; [L38] havoc main_~i~6; [L39] havoc main_~bit~6; [L40] assume (!(main_~bit~6 == 0) && main_~bit~6 < 256) && 0 <= main_~bit~6; [L41] assume ((0 <= main_~y~5 && 0 <= main_~i~6) && main_~i~6 < 256) && main_~y~5 < 256; [L42] main_~y~5 := main_~i~6 + main_~y~5; [L43] assume main_~c~5 < 256 && 0 <= main_~c~5; [L44] main_~c~5 := main_~c~5 + 1; VAL [main_~bit~6=1, main_~c~5=8, main_~i~6=255, main_~y~5=256] [L29] assume main_~c~5 < 256 && !(main_~c~5 < 8); [L30] assume (((!(main_~x~5 + 256 == main_~y~5 - 256) && -256 <= main_~x~5) && main_~y~5 < 256 + 256) && 256 <= main_~y~5) && main_~x~5 < 0; [L31] __VERIFIER_assert_#in~cond := 0; [L32] havoc __VERIFIER_assert_~cond; [L33] __VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; [L34] assume __VERIFIER_assert_~cond == 0; VAL [__VERIFIER_assert_#in~cond=0, __VERIFIER_assert_~cond=0, main_~bit~6=1, main_~c~5=8, main_~i~6=255, main_~x~5=-1, main_~y~5=256] [L47] assert false; VAL [__VERIFIER_assert_#in~cond=0, __VERIFIER_assert_~cond=0, main_~bit~6=1, main_~c~5=8, main_~i~6=255, main_~x~5=-1, main_~y~5=256] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. UNSAFE Result, 0.9s OverallTime, 9 OverallIterations, 8 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 36 SDs, 0 SdLazy, 80 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/84 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 764 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 0/84 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_13-41-25-635.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/num_conversion_2.i_3.bplTransformedIcfg_BEv2_7.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_13-41-25-635.csv Received shutdown request...