java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/programs/recursive/regression/bpl/ackermann.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:07:44,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:07:44,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:07:44,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:07:44,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:07:44,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:07:44,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:07:44,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:07:44,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:07:44,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:07:44,032 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:07:44,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:07:44,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:07:44,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:07:44,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:07:44,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:07:44,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:07:44,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:07:44,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:07:44,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:07:44,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:07:44,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:07:44,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:07:44,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:07:44,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 11:07:44,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:07:44,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:07:44,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:07:44,114 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:07:44,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:07:44,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:07:44,130 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:07:44,130 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:07:44,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/ackermann.bpl [2019-08-05 11:07:44,131 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/recursive/regression/bpl/ackermann.bpl' [2019-08-05 11:07:44,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:07:44,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:07:44,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:44,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:07:44,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:07:44,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,196 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 11:07:44,196 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 11:07:44,196 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 11:07:44,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:07:44,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:07:44,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:07:44,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:07:44,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... [2019-08-05 11:07:44,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:07:44,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:07:44,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:07:44,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:07:44,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-05 11:07:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-08-05 11:07:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-08-05 11:07:44,336 WARN L731 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-08-05 11:07:44,641 INFO L275 CfgBuilder]: Using library mode [2019-08-05 11:07:44,641 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:07:44,643 INFO L202 PluginConnector]: Adding new model ackermann.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:44 BoogieIcfgContainer [2019-08-05 11:07:44,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:07:44,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:07:44,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:07:44,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:07:44,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ackermann.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:07:44" (1/2) ... [2019-08-05 11:07:44,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52905143 and model type ackermann.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:07:44, skipping insertion in model container [2019-08-05 11:07:44,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ackermann.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:07:44" (2/2) ... [2019-08-05 11:07:44,652 INFO L109 eAbstractionObserver]: Analyzing ICFG ackermann.bpl [2019-08-05 11:07:44,661 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:07:44,670 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-08-05 11:07:44,686 INFO L252 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-08-05 11:07:44,710 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:07:44,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:07:44,711 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:07:44,711 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:07:44,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:07:44,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:07:44,712 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:07:44,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:07:44,712 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:07:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-08-05 11:07:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 11:07:44,731 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:44,732 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 11:07:44,734 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ackermannErr1REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr3REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr0REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr4REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr2REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr5REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr6ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash 29903, now seen corresponding path program 1 times [2019-08-05 11:07:44,784 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:44,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:07:44,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:07:44,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:44,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:07:44,976 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:07:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:07:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:07:44,992 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-08-05 11:07:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:45,159 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2019-08-05 11:07:45,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:07:45,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-08-05 11:07:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:45,172 INFO L225 Difference]: With dead ends: 14 [2019-08-05 11:07:45,172 INFO L226 Difference]: Without dead ends: 14 [2019-08-05 11:07:45,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:07:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-08-05 11:07:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-08-05 11:07:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 11:07:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-08-05 11:07:45,210 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 3 [2019-08-05 11:07:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:45,211 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-08-05 11:07:45,211 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:07:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-08-05 11:07:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:07:45,212 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:45,212 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:07:45,213 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ackermannErr1REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr3REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr0REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr4REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr2REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr5REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr6ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 927591, now seen corresponding path program 1 times [2019-08-05 11:07:45,214 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:45,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:07:45,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:07:45,276 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:45,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:07:45,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:07:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:07:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:07:45,278 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2019-08-05 11:07:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:45,360 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2019-08-05 11:07:45,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:07:45,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:07:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:45,361 INFO L225 Difference]: With dead ends: 15 [2019-08-05 11:07:45,362 INFO L226 Difference]: Without dead ends: 15 [2019-08-05 11:07:45,362 INFO L628 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 [2019-08-05 11:07:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-08-05 11:07:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-08-05 11:07:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-08-05 11:07:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2019-08-05 11:07:45,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 4 [2019-08-05 11:07:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:45,371 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2019-08-05 11:07:45,371 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:07:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2019-08-05 11:07:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:07:45,372 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:45,372 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:07:45,373 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ackermannErr1REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr3REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr0REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr4REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr2REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr5REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr6ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 927720, now seen corresponding path program 1 times [2019-08-05 11:07:45,374 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:45,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:07:45,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:07:45,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:45,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:07:45,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:07:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:07:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:07:45,503 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 4 states. [2019-08-05 11:07:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:45,709 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2019-08-05 11:07:45,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:07:45,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 11:07:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:45,711 INFO L225 Difference]: With dead ends: 20 [2019-08-05 11:07:45,711 INFO L226 Difference]: Without dead ends: 20 [2019-08-05 11:07:45,712 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:07:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-08-05 11:07:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-08-05 11:07:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-08-05 11:07:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-08-05 11:07:45,719 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 4 [2019-08-05 11:07:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:45,719 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-08-05 11:07:45,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:07:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-08-05 11:07:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-08-05 11:07:45,720 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:07:45,720 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-08-05 11:07:45,721 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ackermannErr1REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr3REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr0REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr4REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr2REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr5REQUIRES_VIOLATIONPRE_CONDITION, ackermannErr6ENSURES_VIOLATIONPOST_CONDITION]=== [2019-08-05 11:07:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:07:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1420874789, now seen corresponding path program 1 times [2019-08-05 11:07:45,722 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:07:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:07:45,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:07:45,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:07:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-08-05 11:07:45,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:07:45,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:07:45,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:07:45,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:07:45,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:07:45,795 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 4 states. [2019-08-05 11:07:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:07:45,871 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2019-08-05 11:07:45,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:07:45,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-08-05 11:07:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:07:45,872 INFO L225 Difference]: With dead ends: 19 [2019-08-05 11:07:45,872 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:07:45,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:07:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:07:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:07:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:07:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:07:45,874 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-08-05 11:07:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:07:45,875 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:07:45,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:07:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:07:45,875 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:07:45,879 INFO L202 PluginConnector]: Adding new model ackermann.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:07:45 BoogieIcfgContainer [2019-08-05 11:07:45,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:07:45,882 INFO L168 Benchmark]: Toolchain (without parser) took 1718.33 ms. Allocated memory was 137.9 MB in the beginning and 174.1 MB in the end (delta: 36.2 MB). Free memory was 109.4 MB in the beginning and 136.2 MB in the end (delta: -26.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:45,883 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 110.6 MB in the beginning and 110.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:45,884 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.26 ms. Allocated memory is still 137.9 MB. Free memory was 109.4 MB in the beginning and 107.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:45,885 INFO L168 Benchmark]: Boogie Preprocessor took 20.39 ms. Allocated memory is still 137.9 MB. Free memory was 107.4 MB in the beginning and 106.5 MB in the end (delta: 901.1 kB). Peak memory consumption was 901.1 kB. Max. memory is 7.1 GB. [2019-08-05 11:07:45,886 INFO L168 Benchmark]: RCFGBuilder took 424.13 ms. Allocated memory is still 137.9 MB. Free memory was 106.3 MB in the beginning and 96.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-08-05 11:07:45,887 INFO L168 Benchmark]: TraceAbstraction took 1235.25 ms. Allocated memory was 137.9 MB in the beginning and 174.1 MB in the end (delta: 36.2 MB). Free memory was 96.0 MB in the beginning and 136.2 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:07:45,891 INFO L335 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 137.9 MB. Free memory was 110.6 MB in the beginning and 110.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.26 ms. Allocated memory is still 137.9 MB. Free memory was 109.4 MB in the beginning and 107.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.39 ms. Allocated memory is still 137.9 MB. Free memory was 107.4 MB in the beginning and 106.5 MB in the end (delta: 901.1 kB). Peak memory consumption was 901.1 kB. Max. memory is 7.1 GB. * RCFGBuilder took 424.13 ms. Allocated memory is still 137.9 MB. Free memory was 106.3 MB in the beginning and 96.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1235.25 ms. Allocated memory was 137.9 MB in the beginning and 174.1 MB in the end (delta: 36.2 MB). Free memory was 96.0 MB in the beginning and 136.2 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 7 error locations. SAFE Result, 1.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 31 SDslu, 29 SDs, 0 SdLazy, 56 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 363 SizeOfPredicates, 1 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 9/9 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...