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_23.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 11:02:39,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 11:02:39,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 11:02:39,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 11:02:39,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 11:02:39,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 11:02:39,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 11:02:39,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 11:02:39,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 11:02:39,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 11:02:39,143 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 11:02:39,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 11:02:39,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 11:02:39,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 11:02:39,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 11:02:39,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 11:02:39,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 11:02:39,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 11:02:39,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 11:02:39,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 11:02:39,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 11:02:39,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 11:02:39,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 11:02:39,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 11:02:39,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 11:02:39,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 11:02:39,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 11:02:39,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 11:02:39,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 11:02:39,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 11:02:39,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 11:02:39,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 11:02:39,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 11:02:39,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 11:02:39,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 11:02:39,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 11:02:39,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 11:02:39,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 11:02:39,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 11:02:39,217 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 11:02:39,218 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 11:02:39,219 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl [2019-08-05 11:02:39,219 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl' [2019-08-05 11:02:39,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 11:02:39,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 11:02:39,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 11:02:39,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 11:02:39,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 11:02:39,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 11:02:39,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 11:02:39,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 11:02:39,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 11:02:39,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/1) ... [2019-08-05 11:02:39,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 11:02:39,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 11:02:39,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 11:02:39,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 11:02:39,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (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 11:02:39,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 11:02:39,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 11:02:39,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 11:02:39,839 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 11:02:39,840 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 11:02:39,841 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:02:39 BoogieIcfgContainer [2019-08-05 11:02:39,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 11:02:39,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 11:02:39,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 11:02:39,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 11:02:39,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 11:02:39" (1/2) ... [2019-08-05 11:02:39,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65538b7e and model type alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 11:02:39, skipping insertion in model container [2019-08-05 11:02:39,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 11:02:39" (2/2) ... [2019-08-05 11:02:39,850 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl [2019-08-05 11:02:39,860 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 11:02:39,869 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 11:02:39,896 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 11:02:39,958 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 11:02:39,959 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 11:02:39,959 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 11:02:39,959 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 11:02:39,960 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 11:02:39,960 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 11:02:39,960 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 11:02:39,960 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 11:02:39,961 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 11:02:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-05 11:02:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 11:02:39,991 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:02:39,992 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 11:02:39,995 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:02:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:02:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2019-08-05 11:02:40,047 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:02:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:02:40,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2019-08-05 11:02:40,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:02:40,272 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 11:02:40,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:02:40,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 11:02:40,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:02:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:02:40,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:02:40,296 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-08-05 11:02:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:02:40,337 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2019-08-05 11:02:40,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:02:40,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-08-05 11:02:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:02:40,350 INFO L225 Difference]: With dead ends: 7 [2019-08-05 11:02:40,351 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 11:02:40,353 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 11:02:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 11:02:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 11:02:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 11:02:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 11:02:40,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-08-05 11:02:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:02:40,389 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 11:02:40,390 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:02:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 11:02:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 11:02:40,390 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:02:40,391 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-08-05 11:02:40,391 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:02:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:02:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2019-08-05 11:02:40,393 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:02:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:02:40,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2019-08-05 11:02:40,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:02:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:02:40,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 11:02:40,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 11:02:40,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 11:02:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 11:02:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 11:02:40,762 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2019-08-05 11:02:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:02:40,964 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-08-05 11:02:40,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 11:02:40,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-08-05 11:02:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:02:40,965 INFO L225 Difference]: With dead ends: 9 [2019-08-05 11:02:40,965 INFO L226 Difference]: Without dead ends: 9 [2019-08-05 11:02:40,967 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 11:02:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-08-05 11:02:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-08-05 11:02:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 11:02:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-05 11:02:40,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-08-05 11:02:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:02:40,970 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-05 11:02:40,970 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 11:02:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-05 11:02:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 11:02:40,971 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 11:02:40,971 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-08-05 11:02:40,972 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 11:02:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 11:02:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2019-08-05 11:02:40,973 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 11:02:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 11:02:41,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 11:02:41,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 11:02:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 11:02:41,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 11:02:41,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 11:02:41,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 11:02:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 11:02:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 11:02:41,097 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2019-08-05 11:02:41,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 11:02:41,114 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2019-08-05 11:02:41,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 11:02:41,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-08-05 11:02:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 11:02:41,116 INFO L225 Difference]: With dead ends: 5 [2019-08-05 11:02:41,116 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 11:02:41,117 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 11:02:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 11:02:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 11:02:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 11:02:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 11:02:41,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-08-05 11:02:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 11:02:41,118 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 11:02:41,120 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 11:02:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 11:02:41,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 11:02:41,126 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_23.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 11:02:41 BoogieIcfgContainer [2019-08-05 11:02:41,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 11:02:41,130 INFO L168 Benchmark]: Toolchain (without parser) took 1820.89 ms. Allocated memory was 141.6 MB in the beginning and 177.2 MB in the end (delta: 35.7 MB). Free memory was 110.6 MB in the beginning and 135.5 MB in the end (delta: -24.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:02:41,132 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 112.4 MB in the beginning and 112.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 11:02:41,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.33 ms. Allocated memory is still 141.6 MB. Free memory was 110.4 MB in the beginning and 108.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-05 11:02:41,135 INFO L168 Benchmark]: Boogie Preprocessor took 47.59 ms. Allocated memory is still 141.6 MB. Free memory was 108.6 MB in the beginning and 107.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-08-05 11:02:41,136 INFO L168 Benchmark]: RCFGBuilder took 437.97 ms. Allocated memory is still 141.6 MB. Free memory was 107.2 MB in the beginning and 92.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2019-08-05 11:02:41,137 INFO L168 Benchmark]: TraceAbstraction took 1282.68 ms. Allocated memory was 141.6 MB in the beginning and 177.2 MB in the end (delta: 35.7 MB). Free memory was 91.7 MB in the beginning and 135.5 MB in the end (delta: -43.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-05 11:02:41,147 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 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 112.4 MB in the beginning and 112.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.33 ms. Allocated memory is still 141.6 MB. Free memory was 110.4 MB in the beginning and 108.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.59 ms. Allocated memory is still 141.6 MB. Free memory was 108.6 MB in the beginning and 107.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.97 ms. Allocated memory is still 141.6 MB. Free memory was 107.2 MB in the beginning and 92.1 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1282.68 ms. Allocated memory was 141.6 MB in the beginning and 177.2 MB in the end (delta: 35.7 MB). Free memory was 91.7 MB in the beginning and 135.5 MB in the end (delta: -43.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 185]: 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, 6 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 8 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 285 SizeOfPredicates, 30 NumberOfNonLiveVariables, 516 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...