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/20170304-DifficultPathPrograms/sum01_bug02_sum01_bug02_base.case.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-04 21:38:34,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-04 21:38:34,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-04 21:38:34,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-04 21:38:34,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-04 21:38:34,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-04 21:38:34,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-04 21:38:35,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-04 21:38:35,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-04 21:38:35,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-04 21:38:35,005 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-04 21:38:35,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-04 21:38:35,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-04 21:38:35,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-04 21:38:35,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-04 21:38:35,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-04 21:38:35,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-04 21:38:35,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-04 21:38:35,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-04 21:38:35,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-04 21:38:35,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-04 21:38:35,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-04 21:38:35,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-04 21:38:35,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-04 21:38:35,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-04 21:38:35,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-04 21:38:35,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-04 21:38:35,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-04 21:38:35,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-04 21:38:35,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-04 21:38:35,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-04 21:38:35,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-04 21:38:35,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-04 21:38:35,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-04 21:38:35,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-04 21:38:35,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-04 21:38:35,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-04 21:38:35,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-04 21:38:35,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-04 21:38:35,101 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-04 21:38:35,101 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-04 21:38:35,102 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum01_bug02_sum01_bug02_base.case.i_4.bpl [2019-08-04 21:38:35,103 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum01_bug02_sum01_bug02_base.case.i_4.bpl' [2019-08-04 21:38:35,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-04 21:38:35,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-04 21:38:35,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-04 21:38:35,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-04 21:38:35,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-04 21:38:35,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-04 21:38:35,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-04 21:38:35,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-04 21:38:35,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-04 21:38:35,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/1) ... [2019-08-04 21:38:35,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-04 21:38:35,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-04 21:38:35,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-04 21:38:35,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-04 21:38:35,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (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 [2019-08-04 21:38:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-04 21:38:35,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-04 21:38:35,471 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-04 21:38:35,472 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-04 21:38:35,473 INFO L202 PluginConnector]: Adding new model sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:38:35 BoogieIcfgContainer [2019-08-04 21:38:35,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-04 21:38:35,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-04 21:38:35,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-04 21:38:35,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-04 21:38:35,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:38:35" (1/2) ... [2019-08-04 21:38:35,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56017027 and model type sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:38:35, skipping insertion in model container [2019-08-04 21:38:35,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:38:35" (2/2) ... [2019-08-04 21:38:35,482 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i_4.bpl [2019-08-04 21:38:35,491 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-04 21:38:35,498 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-04 21:38:35,514 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-04 21:38:35,537 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-04 21:38:35,538 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-04 21:38:35,538 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-04 21:38:35,538 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-04 21:38:35,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-04 21:38:35,539 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-04 21:38:35,539 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-04 21:38:35,539 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-04 21:38:35,539 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-04 21:38:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-04 21:38:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-04 21:38:35,561 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:38:35,562 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-04 21:38:35,565 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:38:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:38:35,571 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2019-08-04 21:38:35,614 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:38:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:38:35,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-04 21:38:35,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:38:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:38:35,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-04 21:38:35,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-04 21:38:35,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-04 21:38:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-04 21:38:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-04 21:38:35,739 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-04 21:38:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:35,785 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-04 21:38:35,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-04 21:38:35,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-04 21:38:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:35,798 INFO L225 Difference]: With dead ends: 5 [2019-08-04 21:38:35,798 INFO L226 Difference]: Without dead ends: 5 [2019-08-04 21:38:35,800 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-04 21:38:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-04 21:38:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-04 21:38:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-04 21:38:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-04 21:38:35,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-04 21:38:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:35,834 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-04 21:38:35,834 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-04 21:38:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-04 21:38:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-04 21:38:35,835 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:38:35,835 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-04 21:38:35,836 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:38:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:38:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2019-08-04 21:38:35,837 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:38:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:38:35,868 WARN L254 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 13 conjunts are in the unsatisfiable core [2019-08-04 21:38:35,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:38:36,031 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2019-08-04 21:38:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:38:36,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:38:36,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-04 21:38:36,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:38:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:38:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:38:36,167 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-04 21:38:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:36,215 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-04 21:38:36,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:38:36,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-04 21:38:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:36,216 INFO L225 Difference]: With dead ends: 6 [2019-08-04 21:38:36,216 INFO L226 Difference]: Without dead ends: 6 [2019-08-04 21:38:36,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:38:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-04 21:38:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-04 21:38:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-04 21:38:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-04 21:38:36,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-04 21:38:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:36,219 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-04 21:38:36,220 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:38:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-04 21:38:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-04 21:38:36,220 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:38:36,221 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-04 21:38:36,221 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:38:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:38:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2019-08-04 21:38:36,222 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:38:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:38:36,244 WARN L254 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 17 conjunts are in the unsatisfiable core [2019-08-04 21:38:36,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:38:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:38:36,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:38:36,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-04 21:38:36,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-04 21:38:36,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-04 21:38:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:38:36,406 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2019-08-04 21:38:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:36,458 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-04 21:38:36,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-04 21:38:36,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-08-04 21:38:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:36,460 INFO L225 Difference]: With dead ends: 7 [2019-08-04 21:38:36,460 INFO L226 Difference]: Without dead ends: 7 [2019-08-04 21:38:36,461 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:38:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-04 21:38:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-04 21:38:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-04 21:38:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-04 21:38:36,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-04 21:38:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:36,463 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-04 21:38:36,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-04 21:38:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-04 21:38:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-04 21:38:36,464 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:38:36,464 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-04 21:38:36,465 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:38:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:38:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2019-08-04 21:38:36,466 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:38:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:38:36,491 WARN L254 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 21 conjunts are in the unsatisfiable core [2019-08-04 21:38:36,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:38:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:38:36,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:38:36,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-04 21:38:36,745 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-04 21:38:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-04 21:38:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:38:36,746 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-08-04 21:38:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:36,914 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-04 21:38:36,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-04 21:38:36,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-04 21:38:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:36,916 INFO L225 Difference]: With dead ends: 8 [2019-08-04 21:38:36,916 INFO L226 Difference]: Without dead ends: 8 [2019-08-04 21:38:36,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:38:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-04 21:38:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-08-04 21:38:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-08-04 21:38:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-08-04 21:38:36,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-08-04 21:38:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:36,920 INFO L475 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-08-04 21:38:36,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-04 21:38:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-08-04 21:38:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-08-04 21:38:36,921 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:38:36,921 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2019-08-04 21:38:36,921 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:38:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:38:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2019-08-04 21:38:36,923 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:38:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:38:36,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2019-08-04 21:38:36,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:38:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:38:37,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:38:37,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-04 21:38:37,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-04 21:38:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-04 21:38:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:38:37,022 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-08-04 21:38:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:37,042 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2019-08-04 21:38:37,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-04 21:38:37,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-08-04 21:38:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:37,043 INFO L225 Difference]: With dead ends: 5 [2019-08-04 21:38:37,043 INFO L226 Difference]: Without dead ends: 0 [2019-08-04 21:38:37,044 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:38:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-04 21:38:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-04 21:38:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-04 21:38:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-04 21:38:37,045 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2019-08-04 21:38:37,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:37,045 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-04 21:38:37,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-04 21:38:37,045 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-04 21:38:37,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-04 21:38:37,050 INFO L202 PluginConnector]: Adding new model sum01_bug02_sum01_bug02_base.case.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:38:37 BoogieIcfgContainer [2019-08-04 21:38:37,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-04 21:38:37,052 INFO L168 Benchmark]: Toolchain (without parser) took 1908.66 ms. Allocated memory was 141.0 MB in the beginning and 176.7 MB in the end (delta: 35.7 MB). Free memory was 110.7 MB in the beginning and 131.6 MB in the end (delta: -20.9 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:37,053 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 111.9 MB in the beginning and 111.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-08-04 21:38:37,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.32 ms. Allocated memory is still 141.0 MB. Free memory was 110.4 MB in the beginning and 108.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:37,055 INFO L168 Benchmark]: Boogie Preprocessor took 20.53 ms. Allocated memory is still 141.0 MB. Free memory was 108.8 MB in the beginning and 107.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:37,056 INFO L168 Benchmark]: RCFGBuilder took 276.80 ms. Allocated memory is still 141.0 MB. Free memory was 107.8 MB in the beginning and 98.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:37,057 INFO L168 Benchmark]: TraceAbstraction took 1575.11 ms. Allocated memory was 141.0 MB in the beginning and 176.7 MB in the end (delta: 35.7 MB). Free memory was 97.7 MB in the beginning and 131.6 MB in the end (delta: -33.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:37,062 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 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 111.9 MB in the beginning and 111.7 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 32.32 ms. Allocated memory is still 141.0 MB. Free memory was 110.4 MB in the beginning and 108.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.53 ms. Allocated memory is still 141.0 MB. Free memory was 108.8 MB in the beginning and 107.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.80 ms. Allocated memory is still 141.0 MB. Free memory was 107.8 MB in the beginning and 98.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1575.11 ms. Allocated memory was 141.0 MB in the beginning and 176.7 MB in the end (delta: 35.7 MB). Free memory was 97.7 MB in the beginning and 131.6 MB in the end (delta: -33.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 10 SDs, 0 SdLazy, 65 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 406 SizeOfPredicates, 19 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 4/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...