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.6.2.ufo.BOUNDED-12.pals.c_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-56c9370 [2018-07-23 15:27:53,184 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-23 15:27:53,187 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-23 15:27:53,200 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-23 15:27:53,200 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-23 15:27:53,201 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-23 15:27:53,203 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-23 15:27:53,205 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-23 15:27:53,206 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-23 15:27:53,207 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-23 15:27:53,208 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-23 15:27:53,209 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-23 15:27:53,210 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-23 15:27:53,210 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-23 15:27:53,212 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-23 15:27:53,212 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-23 15:27:53,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-23 15:27:53,215 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-23 15:27:53,217 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-23 15:27:53,219 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-23 15:27:53,220 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-23 15:27:53,221 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-23 15:27:53,224 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-23 15:27:53,225 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-23 15:27:53,225 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-23 15:27:53,226 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-23 15:27:53,227 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-23 15:27:53,228 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-23 15:27:53,229 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-23 15:27:53,230 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-23 15:27:53,230 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-23 15:27:53,231 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-23 15:27:53,233 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 15:27:53,248 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-23 15:27:53,249 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-23 15:27:53,250 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-23 15:27:53,250 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol [2018-07-23 15:27:53,252 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-23 15:27:53,253 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-07-23 15:27:53,253 INFO L133 SettingsManager]: * Use separate solver for trace checks=false [2018-07-23 15:27:53,253 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-23 15:27:53,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-23 15:27:53,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-23 15:27:53,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-23 15:27:53,338 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-07-23 15:27:53,339 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-07-23 15:27:53,339 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl [2018-07-23 15:27:53,340 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl' [2018-07-23 15:27:53,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-23 15:27:53,433 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-07-23 15:27:53,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-23 15:27:53,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-23 15:27:53,434 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-23 15:27:53,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-23 15:27:53,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-23 15:27:53,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-23 15:27:53,546 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-23 15:27:53,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/1) ... [2018-07-23 15:27:53,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-23 15:27:53,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-23 15:27:54,588 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-23 15:27:54,589 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:27:54 BoogieIcfgContainer [2018-07-23 15:27:54,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-23 15:27:54,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-23 15:27:54,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-23 15:27:54,597 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-23 15:27:54,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.07 03:27:53" (1/2) ... [2018-07-23 15:27:54,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1972e0 and model type pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 03:27:54, skipping insertion in model container [2018-07-23 15:27:54,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:27:54" (2/2) ... [2018-07-23 15:27:54,610 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl [2018-07-23 15:27:54,622 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-07-23 15:27:54,633 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-23 15:27:54,677 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-23 15:27:54,678 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-23 15:27:54,678 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-23 15:27:54,678 INFO L375 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-07-23 15:27:54,679 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-23 15:27:54,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-23 15:27:54,679 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-23 15:27:54,679 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-23 15:27:54,679 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-23 15:27:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-07-23 15:27:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-07-23 15:27:54,704 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:54,705 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-07-23 15:27:54,705 INFO L414 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1011999, now seen corresponding path program 1 times [2018-07-23 15:27:54,719 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:54,895 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 15:27:54,898 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-23 15:27:54,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-23 15:27:54,903 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:27:54,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:27:54,920 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:27:54,923 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2018-07-23 15:27:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:55,014 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-07-23 15:27:55,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:27:55,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-07-23 15:27:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:55,029 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:27:55,029 INFO L226 Difference]: Without dead ends: 8 [2018-07-23 15:27:55,034 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 15:27:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-07-23 15:27:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-07-23 15:27:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-07-23 15:27:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-07-23 15:27:55,081 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-07-23 15:27:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:55,081 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-07-23 15:27:55,081 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:27:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-07-23 15:27:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-07-23 15:27:55,082 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:55,082 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-07-23 15:27:55,083 INFO L414 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 972615673, now seen corresponding path program 1 times [2018-07-23 15:27:55,084 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:55,192 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 15:27:55,192 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:55,193 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-07-23 15:27:55,195 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-23 15:27:55,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-23 15:27:55,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-23 15:27:55,196 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-07-23 15:27:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:55,258 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-07-23 15:27:55,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-23 15:27:55,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-07-23 15:27:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:55,260 INFO L225 Difference]: With dead ends: 12 [2018-07-23 15:27:55,260 INFO L226 Difference]: Without dead ends: 10 [2018-07-23 15:27:55,261 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-23 15:27:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-07-23 15:27:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-07-23 15:27:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-07-23 15:27:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-07-23 15:27:55,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-07-23 15:27:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:55,267 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-07-23 15:27:55,267 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-23 15:27:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-07-23 15:27:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-07-23 15:27:55,268 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:55,268 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-07-23 15:27:55,269 INFO L414 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1619124141, now seen corresponding path program 2 times [2018-07-23 15:27:55,269 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-23 15:27:55,395 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:55,395 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-07-23 15:27:55,396 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-23 15:27:55,396 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-23 15:27:55,398 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-07-23 15:27:55,398 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2018-07-23 15:27:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:55,553 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-07-23 15:27:55,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-23 15:27:55,554 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-07-23 15:27:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:55,555 INFO L225 Difference]: With dead ends: 13 [2018-07-23 15:27:55,555 INFO L226 Difference]: Without dead ends: 11 [2018-07-23 15:27:55,556 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-07-23 15:27:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-07-23 15:27:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-07-23 15:27:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-07-23 15:27:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-07-23 15:27:55,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-07-23 15:27:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:55,565 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-07-23 15:27:55,565 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-23 15:27:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-07-23 15:27:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-23 15:27:55,566 INFO L345 BasicCegarLoop]: Found error trace [2018-07-23 15:27:55,567 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-07-23 15:27:55,567 INFO L414 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0AssertViolationASSERT]=== [2018-07-23 15:27:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1200053715, now seen corresponding path program 3 times [2018-07-23 15:27:55,568 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-07-23 15:27:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-23 15:27:55,761 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 15:27:55,761 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-07-23 15:27:55,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-07-23 15:27:55,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-23 15:27:55,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-23 15:27:55,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-07-23 15:27:55,764 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-07-23 15:27:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-23 15:27:55,787 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-07-23 15:27:55,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-23 15:27:55,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-07-23 15:27:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-23 15:27:55,789 INFO L225 Difference]: With dead ends: 11 [2018-07-23 15:27:55,789 INFO L226 Difference]: Without dead ends: 0 [2018-07-23 15:27:55,790 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 15:27:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-23 15:27:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-23 15:27:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-23 15:27:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-23 15:27:55,791 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2018-07-23 15:27:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-23 15:27:55,791 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-23 15:27:55,792 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-23 15:27:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-23 15:27:55,792 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-23 15:27:55,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-23 15:27:55,883 INFO L421 ceAbstractionStarter]: For program point L387(lines 382 388) no Hoare annotation was computed. [2018-07-23 15:27:55,885 INFO L417 ceAbstractionStarter]: At program point L541(lines 365 541) the Hoare annotation is: (let ((.cse0 (<= ~r1 0)) (.cse1 (<= 0 ~r1))) (or (and .cse0 (= ~mode3 (* 256 (div ~mode3 256))) (= ~mode1 (* 256 (div ~mode1 256))) (<= ~send2 127) (= ~mode2 (* 256 (div ~mode2 256))) (<= 0 ~send2) (= 0 (+ ~nomsg 1)) .cse1) (and (<= ULTIMATE.start_assert_~arg 1) .cse0 (not (= ~p2_old ~nomsg)) (<= 1 ~mode1) (<= ~mode1 1) (not (= ~send2 (+ (* 256 (div ~send2 256)) 255))) (<= ~mode3 1) (<= 1 ~mode3) (<= 1 ULTIMATE.start_assert_~arg) .cse1))) [2018-07-23 15:27:55,889 INFO L421 ceAbstractionStarter]: For program point L508(lines 508 515) no Hoare annotation was computed. [2018-07-23 15:27:55,889 INFO L421 ceAbstractionStarter]: For program point L450(lines 444 451) no Hoare annotation was computed. [2018-07-23 15:27:55,889 INFO L421 ceAbstractionStarter]: For program point L372(lines 372 383) no Hoare annotation was computed. [2018-07-23 15:27:55,889 INFO L421 ceAbstractionStarter]: For program point L410(lines 401 411) no Hoare annotation was computed. [2018-07-23 15:27:55,889 INFO L417 ceAbstractionStarter]: At program point L535(lines 535 542) the Hoare annotation is: false [2018-07-23 15:27:55,890 INFO L421 ceAbstractionStarter]: For program point L455(lines 455 465) no Hoare annotation was computed. [2018-07-23 15:27:55,890 INFO L421 ceAbstractionStarter]: For program point L415(lines 415 425) no Hoare annotation was computed. [2018-07-23 15:27:55,890 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 108 544) no Hoare annotation was computed. [2018-07-23 15:27:55,893 INFO L417 ceAbstractionStarter]: At program point L529(lines 529 536) the Hoare annotation is: (and (<= ~r1 0) (not (= ~p2_old ~nomsg)) (<= 1 ~mode1) (<= ~mode1 1) (not (= ~send2 (+ (* 256 (div ~send2 256)) 255))) (<= ~mode3 1) (<= 1 ~mode3) (= 1 ULTIMATE.start_assert_~arg) (<= 0 ~r1)) [2018-07-23 15:27:55,893 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 108 544) the Hoare annotation is: true [2018-07-23 15:27:55,894 INFO L417 ceAbstractionStarter]: At program point ULTIMATE.startEXIT(lines 108 544) the Hoare annotation is: false [2018-07-23 15:27:55,894 INFO L421 ceAbstractionStarter]: For program point L490(lines 484 491) no Hoare annotation was computed. [2018-07-23 15:27:55,894 INFO L421 ceAbstractionStarter]: For program point L470(lines 464 471) no Hoare annotation was computed. [2018-07-23 15:27:55,894 INFO L421 ceAbstractionStarter]: For program point L392(lines 392 402) no Hoare annotation was computed. [2018-07-23 15:27:55,894 INFO L421 ceAbstractionStarter]: For program point L475(lines 475 485) no Hoare annotation was computed. [2018-07-23 15:27:55,894 INFO L421 ceAbstractionStarter]: For program point L430(lines 424 431) no Hoare annotation was computed. [2018-07-23 15:27:55,895 INFO L421 ceAbstractionStarter]: For program point L435(lines 435 445) no Hoare annotation was computed. [2018-07-23 15:27:55,895 INFO L417 ceAbstractionStarter]: At program point ULTIMATE.startErr0AssertViolationASSERT(line 543) the Hoare annotation is: false [2018-07-23 15:27:55,895 INFO L421 ceAbstractionStarter]: For program point L519(lines 514 520) no Hoare annotation was computed. [2018-07-23 15:27:55,912 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.07 03:27:55 BoogieIcfgContainer [2018-07-23 15:27:55,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-23 15:27:55,915 INFO L168 Benchmark]: Toolchain (without parser) took 2483.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 158.5 MB). Peak memory consumption was 158.5 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:55,918 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:27:55,919 INFO L168 Benchmark]: Boogie Preprocessor took 108.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-23 15:27:55,922 INFO L168 Benchmark]: RCFGBuilder took 1044.08 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 15:27:55,923 INFO L168 Benchmark]: TraceAbstraction took 1319.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-07-23 15:27:55,929 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.00 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 1044.08 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. * TraceAbstraction took 1319.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 543]: 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: 529]: Loop Invariant Derived loop invariant: (((((((~r1 <= 0 && !(~p2_old == ~nomsg)) && 1 <= ~mode1) && ~mode1 <= 1) && !(~send2 == 256 * (~send2 / 256) + 255)) && ~mode3 <= 1) && 1 <= ~mode3) && 1 == assert_~arg) && 0 <= ~r1 - InvariantResult [Line: 365]: Loop Invariant Derived loop invariant: (((((((~r1 <= 0 && ~mode3 == 256 * (~mode3 / 256)) && ~mode1 == 256 * (~mode1 / 256)) && ~send2 <= 127) && ~mode2 == 256 * (~mode2 / 256)) && 0 <= ~send2) && 0 == ~nomsg + 1) && 0 <= ~r1) || (((((((((assert_~arg <= 1 && ~r1 <= 0) && !(~p2_old == ~nomsg)) && 1 <= ~mode1) && ~mode1 <= 1) && !(~send2 == 256 * (~send2 / 256) + 255)) && ~mode3 <= 1) && 1 <= ~mode3) && 1 <= assert_~arg) && 0 <= ~r1) - InvariantResult [Line: 535]: Loop Invariant Derived loop invariant: false - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. SAFE Result, 1.2s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 10 SDslu, 16 SDs, 0 SdLazy, 47 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 9 NumberOfFragments, 119 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 12/20 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.6.2.ufo.BOUNDED-12.pals.c_12.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-07-23_15-27-55-959.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl_AutomizerBpl-nestedInterpolants.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-23_15-27-55-959.csv Received shutdown request...