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/20170304-DifficultPathPrograms/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:26:59,234 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:26:59,236 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:26:59,249 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:26:59,249 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:26:59,251 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:26:59,252 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:26:59,254 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:26:59,255 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:26:59,256 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:26:59,257 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:26:59,258 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:26:59,259 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:26:59,260 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:26:59,261 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:26:59,262 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:26:59,263 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:26:59,265 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:26:59,267 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:26:59,269 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:26:59,270 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:26:59,271 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:26:59,274 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 15:26:59,274 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:26:59,274 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:26:59,275 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:26:59,276 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:26:59,277 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:26:59,278 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:26:59,279 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:26:59,280 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:26:59,280 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:26:59,283 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 15:26:59,306 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:26:59,307 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:26:59,308 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:26:59,309 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:26:59,309 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:26:59,309 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:26:59,312 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:26:59,312 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:26:59,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:26:59,394 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:26:59,400 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:26:59,402 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:26:59,403 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:26:59,404 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl [2018-07-23 15:26:59,404 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl' [2018-07-23 15:26:59,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:26:59,521 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:26:59,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:26:59,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:26:59,522 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:26:59,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:26:59,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:26:59,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:26:59,607 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:26:59,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/1) ... [2018-07-23 15:26:59,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:26:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:27:00,331 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:27:00,332 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:27:00 BoogieIcfgContainer [2018-07-23 15:27:00,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:27:00,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:27:00,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:27:00,337 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:27:00,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:26:59" (1/2) ... [2018-07-23 15:27:00,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402ee840 and model type pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:27:00, skipping insertion in model container [2018-07-23 15:27:00,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:27:00" (2/2) ... [2018-07-23 15:27:00,341 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl [2018-07-23 15:27:00,351 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:27:00,362 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:27:00,403 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:27:00,404 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:27:00,404 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:27:00,404 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:27:00,405 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:27:00,405 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:27:00,405 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:27:00,405 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:27:00,405 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:27:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:27:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:27:00,426 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:00,427 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:27:00,427 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash 979518, now seen corresponding path program 1 times [2018-07-23 15:27:00,438 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:00,602 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 15:27:00,604 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:27:00,605 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 15:27:00,610 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:27:00,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:27:00,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:27:00,629 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-07-23 15:27:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:00,702 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-07-23 15:27:00,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:27:00,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:27:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:00,722 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:27:00,722 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:27:00,727 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 15:27:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:27:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-07-23 15:27:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:27:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:27:00,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 15:27:00,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:00,766 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:27:00,766 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:27:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:27:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:27:00,767 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:00,767 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-23 15:27:00,767 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash 941392015, now seen corresponding path program 1 times [2018-07-23 15:27:00,768 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:00,876 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:00,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:27:00,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:27:00,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:27:00,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:27:00,883 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-07-23 15:27:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:00,976 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:27:00,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:27:00,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-07-23 15:27:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:00,977 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:27:00,977 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:27:00,978 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:27:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:27:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-07-23 15:27:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:27:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:27:00,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 15:27:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:00,983 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:27:00,983 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:27:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:27:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:27:00,984 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:00,984 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-07-23 15:27:00,985 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1560297824, now seen corresponding path program 2 times [2018-07-23 15:27:00,985 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:01,139 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 15:27:01,140 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:01,140 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-07-23 15:27:01,141 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-23 15:27:01,141 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-23 15:27:01,141 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:27:01,142 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-07-23 15:27:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:01,241 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-07-23 15:27:01,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-23 15:27:01,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-07-23 15:27:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:01,243 INFO L225 Difference]: With dead ends: 14 [2018-07-23 15:27:01,244 INFO L226 Difference]: Without dead ends: 12 [2018-07-23 15:27:01,244 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:27:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-23 15:27:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-07-23 15:27:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:27:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:27:01,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-23 15:27:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:01,256 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:27:01,256 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-23 15:27:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:27:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:27:01,257 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:01,258 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-07-23 15:27:01,258 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash -502547343, now seen corresponding path program 3 times [2018-07-23 15:27:01,258 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-23 15:27:01,358 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:01,358 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:27:01,359 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:27:01,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:27:01,360 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:27:01,360 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-07-23 15:27:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:01,375 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:27:01,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:27:01,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-23 15:27:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:01,377 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:27:01,377 INFO L226 Difference]: Without dead ends: 0 [2018-07-23 15:27:01,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 15:27:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-23 15:27:01,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-23 15:27:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-23 15:27:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-23 15:27:01,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-07-23 15:27:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:01,380 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-23 15:27:01,380 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:27:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-23 15:27:01,380 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-23 15:27:01,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-23 15:27:01,461 INFO L421 ceAbstractionStarter]: For program point L223(lines 214 224) no Hoare annotation was computed. [2018-07-23 15:27:01,462 INFO L421 ceAbstractionStarter]: For program point L289(lines 284 290) no Hoare annotation was computed. [2018-07-23 15:27:01,462 INFO L421 ceAbstractionStarter]: For program point L266(lines 259 267) no Hoare annotation was computed. [2018-07-23 15:27:01,462 INFO L421 ceAbstractionStarter]: For program point L246(lines 237 247) no Hoare annotation was computed. [2018-07-23 15:27:01,467 INFO L417 ceAbstractionStarter]: At program point L308(lines 199 308) the Hoare annotation is: (let ((.cse0 (<= ~r1 (* 256 (div ~r1 256))))) (or (and (<= ULTIMATE.start_assert_~arg 1) (not (= ~p2_old ~nomsg)) (<= 1 ~mode1) (<= ~mode1 1) (<= ~mode3 1) (<= 1 ~mode3) (<= 1 ULTIMATE.start_assert_~arg) .cse0) (and (= ~mode3 (* 256 (div ~mode3 256))) (= ~mode1 (* 256 (div ~mode1 256))) (<= ~send2 127) (= ~mode2 (* 256 (div ~mode2 256))) (<= 0 ~send2) (= 0 (+ ~nomsg 1)) .cse0))) [2018-07-23 15:27:01,467 INFO L421 ceAbstractionStarter]: For program point L206(lines 206 215) no Hoare annotation was computed. [2018-07-23 15:27:01,468 INFO L421 ceAbstractionStarter]: For program point L228(lines 228 238) no Hoare annotation was computed. [2018-07-23 15:27:01,468 INFO L417 ceAbstractionStarter]: At program point L305(lines 305 309) the Hoare annotation is: false [2018-07-23 15:27:01,468 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 57 311) the Hoare annotation is: true [2018-07-23 15:27:01,468 INFO L417 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 57 311) the Hoare annotation is: false [2018-07-23 15:27:01,468 INFO L421 ceAbstractionStarter]: For program point L251(lines 251 260) no Hoare annotation was computed. [2018-07-23 15:27:01,468 INFO L421 ceAbstractionStarter]: For program point L278(lines 278 285) no Hoare annotation was computed. [2018-07-23 15:27:01,469 INFO L417 ceAbstractionStarter]: At program point L299(lines 299 306) the Hoare annotation is: (and (<= ULTIMATE.start_assert_~arg 1) (not (= ~p2_old ~nomsg)) (<= 1 ~mode1) (<= ~mode1 1) (<= ~mode3 1) (<= 1 ~mode3) (<= 1 ULTIMATE.start_assert_~arg) (<= ~r1 (* 256 (div ~r1 256)))) [2018-07-23 15:27:01,471 INFO L417 ceAbstractionStarter]: At program point ULTIMATE.startErr0AssertViolationASSERT(line 310) the Hoare annotation is: false [2018-07-23 15:27:01,472 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 57 311) no Hoare annotation was computed. [2018-07-23 15:27:01,490 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:27:01 BoogieIcfgContainer [2018-07-23 15:27:01,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:27:01,492 INFO L168 Benchmark]: Toolchain (without parser) took 1972.37 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: 116.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:01,495 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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 15:27:01,496 INFO L168 Benchmark]: Boogie Preprocessor took 84.85 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 15:27:01,498 INFO L168 Benchmark]: RCFGBuilder took 725.76 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 15:27:01,500 INFO L168 Benchmark]: TraceAbstraction took 1157.20 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:01,506 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 0.20 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 84.85 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 725.76 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. * TraceAbstraction took 1157.20 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 310]: 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: 299]: Loop Invariant Derived loop invariant: ((((((assert_~arg <= 1 && !(~p2_old == ~nomsg)) && 1 <= ~mode1) && ~mode1 <= 1) && ~mode3 <= 1) && 1 <= ~mode3) && 1 <= assert_~arg) && ~r1 <= 256 * (~r1 / 256) - InvariantResult [Line: 305]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 199]: Loop Invariant Derived loop invariant: (((((((assert_~arg <= 1 && !(~p2_old == ~nomsg)) && 1 <= ~mode1) && ~mode1 <= 1) && ~mode3 <= 1) && 1 <= ~mode3) && 1 <= assert_~arg) && ~r1 <= 256 * (~r1 / 256)) || ((((((~mode3 == 256 * (~mode3 / 256) && ~mode1 == 256 * (~mode1 / 256)) && ~send2 <= 127) && ~mode2 == 256 * (~mode2 / 256)) && 0 <= ~send2) && 0 == ~nomsg + 1) && ~r1 <= 256 * (~r1 / 256)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 6 SDslu, 19 SDs, 0 SdLazy, 44 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 9 NumberOfFragments, 105 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1377 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 11/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-27-01-532.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c_9.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-27-01-532.csv Received shutdown request...