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/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:00:26,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:00:26,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:00:26,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-08-05 11:00:26,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:00:26,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:00:26,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:00:26,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:00:26,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:00:26,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:00:26,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:00:26,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:00:26,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:00:26,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:00:26,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:00:26,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:00:26,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 11:00:26,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:00:26,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:00:26,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:00:26,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:00:26,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:00:26,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:00:26,219 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:00:26,219 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:00:26,220 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl [2019-08-05 11:00:26,221 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl' [2019-08-05 11:00:26,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:00:26,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:00:26,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:00:26,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:00:26,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:00:26,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:00:26,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:00:26,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:00:26,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:00:26,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/1) ... [2019-08-05 11:00:26,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:00:26,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:00:26,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:00:26,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:00:26,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (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 11:00:26,487 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 11:00:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 11:00:26,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 11:00:27,076 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 11:00:27,077 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:00:27,078 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:00:27 BoogieIcfgContainer [2019-08-05 11:00:27,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:00:27,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:00:27,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:00:27,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:00:27,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:00:26" (1/2) ... [2019-08-05 11:00:27,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b27ae9 and model type alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:00:27, skipping insertion in model container [2019-08-05 11:00:27,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:00:27" (2/2) ... [2019-08-05 11:00:27,088 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl [2019-08-05 11:00:27,099 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:00:27,110 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:00:27,128 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:00:27,162 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:00:27,162 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:00:27,163 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:00:27,163 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:00:27,163 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:00:27,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:00:27,163 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:00:27,164 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:00:27,164 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:00:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-08-05 11:00:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:00:27,184 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:00:27,185 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-05 11:00:27,187 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:00:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:00:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 889539725, now seen corresponding path program 1 times [2019-08-05 11:00:27,248 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:00:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:00:27,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-08-05 11:00:27,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:00:27,429 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-08-05 11:00:27,429 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-05 11:00:27,463 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-05 11:00:27,463 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-08-05 11:00:27,463 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-08-05 11:00:27,545 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 11:00:27,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:00:27,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-08-05 11:00:27,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 11:00:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 11:00:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:00:27,569 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 5 states. [2019-08-05 11:00:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:00:27,845 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-08-05 11:00:27,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 11:00:27,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-05 11:00:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:00:27,858 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:00:27,858 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:00:27,861 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-08-05 11:00:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:00:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:00:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:00:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-05 11:00:27,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-08-05 11:00:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:00:27,900 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-05 11:00:27,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 11:00:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-05 11:00:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 11:00:27,901 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:00:27,901 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-08-05 11:00:27,901 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:00:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:00:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash 149228673, now seen corresponding path program 1 times [2019-08-05 11:00:27,903 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:00:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:00:28,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2019-08-05 11:00:28,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:00:28,153 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-08-05 11:00:28,154 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-05 11:00:28,188 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-05 11:00:28,190 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-08-05 11:00:28,190 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2019-08-05 11:00:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:00:28,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:00:28,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:00:28,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:00:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:00:28,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:00:28,238 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-08-05 11:00:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:00:28,391 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-08-05 11:00:28,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 11:00:28,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-08-05 11:00:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:00:28,392 INFO L225 Difference]: With dead ends: 13 [2019-08-05 11:00:28,392 INFO L226 Difference]: Without dead ends: 11 [2019-08-05 11:00:28,393 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:00:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-05 11:00:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-08-05 11:00:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 11:00:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-08-05 11:00:28,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-08-05 11:00:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:00:28,401 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-08-05 11:00:28,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:00:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-08-05 11:00:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-05 11:00:28,402 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:00:28,402 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-08-05 11:00:28,402 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:00:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:00:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash 775146019, now seen corresponding path program 1 times [2019-08-05 11:00:28,404 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:00:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:00:28,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2019-08-05 11:00:28,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:00:28,677 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-08-05 11:00:28,677 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-05 11:00:28,695 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-05 11:00:28,714 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-08-05 11:00:28,714 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-08-05 11:00:28,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-05 11:00:28,794 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-08-05 11:00:28,794 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:20, output treesize:11 [2019-08-05 11:00:28,882 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-08-05 11:00:28,883 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-05 11:00:28,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-05 11:00:28,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-08-05 11:00:28,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2019-08-05 11:00:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:00:28,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:00:28,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-05 11:00:28,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-05 11:00:28,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-05 11:00:28,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-08-05 11:00:28,975 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2019-08-05 11:00:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:00:29,431 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-08-05 11:00:29,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-05 11:00:29,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-08-05 11:00:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:00:29,433 INFO L225 Difference]: With dead ends: 13 [2019-08-05 11:00:29,433 INFO L226 Difference]: Without dead ends: 13 [2019-08-05 11:00:29,434 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-08-05 11:00:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-08-05 11:00:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-08-05 11:00:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 11:00:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-08-05 11:00:29,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-08-05 11:00:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:00:29,437 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-08-05 11:00:29,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-05 11:00:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-08-05 11:00:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-05 11:00:29,438 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:00:29,438 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-08-05 11:00:29,438 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:00:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:00:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1886026903, now seen corresponding path program 2 times [2019-08-05 11:00:29,440 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:00:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:00:29,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:00:29,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:00:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-08-05 11:00:29,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:00:29,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:00:29,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:00:29,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:00:29,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:00:29,525 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-08-05 11:00:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:00:29,538 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-08-05 11:00:29,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:00:29,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-08-05 11:00:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:00:29,539 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:00:29,539 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:00:29,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:00:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:00:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:00:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:00:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:00:29,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-08-05 11:00:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:00:29,542 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:00:29,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:00:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:00:29,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:00:29,548 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_38.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:00:29 BoogieIcfgContainer [2019-08-05 11:00:29,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:00:29,550 INFO L168 Benchmark]: Toolchain (without parser) took 3271.56 ms. Allocated memory was 132.1 MB in the beginning and 172.5 MB in the end (delta: 40.4 MB). Free memory was 106.5 MB in the beginning and 77.7 MB in the end (delta: 28.8 MB). Peak memory consumption was 69.2 MB. Max. memory is 7.1 GB. [2019-08-05 11:00:29,551 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 132.1 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:00:29,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.43 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 104.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:00:29,553 INFO L168 Benchmark]: Boogie Preprocessor took 58.04 ms. Allocated memory is still 132.1 MB. Free memory was 104.4 MB in the beginning and 103.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 11:00:29,554 INFO L168 Benchmark]: RCFGBuilder took 678.90 ms. Allocated memory is still 132.1 MB. Free memory was 103.1 MB in the beginning and 80.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2019-08-05 11:00:29,555 INFO L168 Benchmark]: TraceAbstraction took 2468.33 ms. Allocated memory was 132.1 MB in the beginning and 172.5 MB in the end (delta: 40.4 MB). Free memory was 80.2 MB in the beginning and 77.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2019-08-05 11:00:29,558 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 0.25 ms. Allocated memory is still 132.1 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.43 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 104.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.04 ms. Allocated memory is still 132.1 MB. Free memory was 104.4 MB in the beginning and 103.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 678.90 ms. Allocated memory is still 132.1 MB. Free memory was 103.1 MB in the beginning and 80.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2468.33 ms. Allocated memory was 132.1 MB in the beginning and 172.5 MB in the end (delta: 40.4 MB). Free memory was 80.2 MB in the beginning and 77.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 219]: 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, 8 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 16 SDslu, 21 SDs, 0 SdLazy, 62 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 2 QuantifiedInterpolants, 1318 SizeOfPredicates, 37 NumberOfNonLiveVariables, 584 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 10/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...