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/lis_unsafe_false-valid-deref.i_13.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:58:51,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:58:51,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:58:51,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:58:51,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:58:51,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:58:51,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:58:51,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:58:51,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:58:51,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:58:51,697 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:58:51,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:58:51,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:58:51,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:58:51,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:58:51,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:58:51,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:58:51,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:58:51,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:58:51,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:58:51,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:58:51,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:58:51,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:58:51,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:58:51,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-05 10:58:51,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:58:51,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:58:51,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:58:51,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:58:51,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:58:51,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:58:51,810 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:58:51,810 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:58:51,811 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/lis_unsafe_false-valid-deref.i_13.bpl [2019-08-05 10:58:51,811 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/lis_unsafe_false-valid-deref.i_13.bpl' [2019-08-05 10:58:51,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:58:51,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:58:51,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:58:51,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:58:51,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:58:51,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:58:51,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:58:51,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:58:51,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:58:51,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/1) ... [2019-08-05 10:58:51,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:58:51,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:58:51,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:58:51,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:58:51,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (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 10:58:52,012 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 10:58:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 10:58:52,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 10:58:52,342 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 10:58:52,343 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:58:52,344 INFO L202 PluginConnector]: Adding new model lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:58:52 BoogieIcfgContainer [2019-08-05 10:58:52,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:58:52,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:58:52,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:58:52,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:58:52,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:58:51" (1/2) ... [2019-08-05 10:58:52,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29368445 and model type lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:58:52, skipping insertion in model container [2019-08-05 10:58:52,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:58:52" (2/2) ... [2019-08-05 10:58:52,352 INFO L109 eAbstractionObserver]: Analyzing ICFG lis_unsafe_false-valid-deref.i_13.bpl [2019-08-05 10:58:52,362 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:58:52,369 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:58:52,386 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:58:52,412 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:58:52,413 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:58:52,413 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:58:52,413 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:58:52,413 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:58:52,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:58:52,414 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:58:52,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:58:52,414 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:58:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-08-05 10:58:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 10:58:52,436 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:58:52,437 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-08-05 10:58:52,439 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:58:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:58:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash 28787175, now seen corresponding path program 1 times [2019-08-05 10:58:52,492 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:58:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:58:52,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 10:58:52,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:58:52,733 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 10:58:52,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:58:52,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 10:58:52,739 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:58:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:58:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:58:52,752 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2019-08-05 10:58:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:58:52,909 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-08-05 10:58:52,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:58:52,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-08-05 10:58:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:58:52,921 INFO L225 Difference]: With dead ends: 12 [2019-08-05 10:58:52,921 INFO L226 Difference]: Without dead ends: 11 [2019-08-05 10:58:52,923 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:58:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-08-05 10:58:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 7. [2019-08-05 10:58:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:58:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-08-05 10:58:52,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2019-08-05 10:58:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:58:52,957 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-08-05 10:58:52,957 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:58:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-08-05 10:58:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:58:52,958 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:58:52,958 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-08-05 10:58:52,959 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:58:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:58:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 894126352, now seen corresponding path program 1 times [2019-08-05 10:58:52,960 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:58:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:58:53,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2019-08-05 10:58:53,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:58:53,225 INFO L341 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2019-08-05 10:58:53,226 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 1 case distinctions, treesize of input 13 treesize of output 15 [2019-08-05 10:58:53,227 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-08-05 10:58:53,249 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-08-05 10:58:53,253 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-08-05 10:58:53,254 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:21 [2019-08-05 10:58:53,664 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-08-05 10:58:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:58:53,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:58:53,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:58:53,892 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:58:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:58:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:58:53,893 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 6 states. [2019-08-05 10:58:54,179 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-08-05 10:58:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:58:54,406 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-08-05 10:58:54,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:58:54,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-05 10:58:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:58:54,407 INFO L225 Difference]: With dead ends: 10 [2019-08-05 10:58:54,407 INFO L226 Difference]: Without dead ends: 10 [2019-08-05 10:58:54,408 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-08-05 10:58:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-05 10:58:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-08-05 10:58:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 10:58:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-08-05 10:58:54,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-08-05 10:58:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:58:54,411 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-08-05 10:58:54,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:58:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-08-05 10:58:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 10:58:54,412 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:58:54,412 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-08-05 10:58:54,412 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:58:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:58:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 262017386, now seen corresponding path program 1 times [2019-08-05 10:58:54,414 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:58:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:58:54,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:58:54,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:58:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-08-05 10:58:54,516 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:58:54,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-08-05 10:58:54,517 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:58:54,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:58:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:58:54,519 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-08-05 10:58:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:58:54,535 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:58:54,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:58:54,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-08-05 10:58:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:58:54,536 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:58:54,536 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:58:54,537 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:58:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:58:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:58:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:58:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:58:54,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-08-05 10:58:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:58:54,539 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:58:54,539 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:58:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:58:54,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:58:54,544 INFO L202 PluginConnector]: Adding new model lis_unsafe_false-valid-deref.i_13.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:58:54 BoogieIcfgContainer [2019-08-05 10:58:54,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:58:54,547 INFO L168 Benchmark]: Toolchain (without parser) took 2684.08 ms. Allocated memory was 135.3 MB in the beginning and 168.8 MB in the end (delta: 33.6 MB). Free memory was 112.5 MB in the beginning and 107.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2019-08-05 10:58:54,548 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 135.3 MB. Free memory was 114.1 MB in the beginning and 113.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-08-05 10:58:54,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.84 ms. Allocated memory is still 135.3 MB. Free memory was 112.3 MB in the beginning and 110.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-08-05 10:58:54,550 INFO L168 Benchmark]: Boogie Preprocessor took 27.34 ms. Allocated memory is still 135.3 MB. Free memory was 110.7 MB in the beginning and 109.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:58:54,551 INFO L168 Benchmark]: RCFGBuilder took 414.30 ms. Allocated memory is still 135.3 MB. Free memory was 109.2 MB in the beginning and 95.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2019-08-05 10:58:54,552 INFO L168 Benchmark]: TraceAbstraction took 2199.27 ms. Allocated memory was 135.3 MB in the beginning and 168.8 MB in the end (delta: 33.6 MB). Free memory was 95.6 MB in the beginning and 107.6 MB in the end (delta: -12.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2019-08-05 10:58:54,557 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 0.24 ms. Allocated memory is still 135.3 MB. Free memory was 114.1 MB in the beginning and 113.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.84 ms. Allocated memory is still 135.3 MB. Free memory was 112.3 MB in the beginning and 110.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.34 ms. Allocated memory is still 135.3 MB. Free memory was 110.7 MB in the beginning and 109.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.30 ms. Allocated memory is still 135.3 MB. Free memory was 109.2 MB in the beginning and 95.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2199.27 ms. Allocated memory was 135.3 MB in the beginning and 168.8 MB in the end (delta: 33.6 MB). Free memory was 95.6 MB in the beginning and 107.6 MB in the end (delta: -12.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 166]: 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, 7 locations, 1 error locations. SAFE Result, 2.1s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8 SDtfs, 12 SDslu, 6 SDs, 0 SdLazy, 38 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s 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, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 4 QuantifiedInterpolants, 898 SizeOfPredicates, 18 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 3/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...