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/Interactive/input/boogie/stmt-multiassign-bug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 09:52:25,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 09:52:25,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 09:52:25,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 09:52:25,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 09:52:25,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 09:52:25,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 09:52:25,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 09:52:25,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 09:52:25,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 09:52:25,784 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 09:52:25,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 09:52:25,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 09:52:25,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 09:52:25,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 09:52:25,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 09:52:25,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 09:52:25,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 09:52:25,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 09:52:25,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 09:52:25,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 09:52:25,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 09:52:25,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 09:52:25,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 09:52:25,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 09:52:25,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 09:52:25,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 09:52:25,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 09:52:25,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 09:52:25,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 09:52:25,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 09:52:25,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 09:52:25,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 09:52:25,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 09:52:25,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 09:52:25,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 09:52:25,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 09:52:25,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 09:52:25,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 09:52:25,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 09:52:25,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 09:52:25,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 09:52:25,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 09:52:25,879 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 09:52:25,880 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 09:52:25,881 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 09:52:25,882 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/Interactive/input/boogie/stmt-multiassign-bug.bpl [2019-08-05 09:52:25,882 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/Interactive/input/boogie/stmt-multiassign-bug.bpl' [2019-08-05 09:52:25,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 09:52:25,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 09:52:25,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 09:52:25,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 09:52:25,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 09:52:25,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 09:52:25,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 09:52:25,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 09:52:25,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 09:52:25,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/1) ... [2019-08-05 09:52:25,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 09:52:25,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 09:52:25,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 09:52:25,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 09:52:25,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (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 09:52:26,035 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-05 09:52:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 09:52:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 09:52:26,303 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 09:52:26,303 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 09:52:26,304 INFO L202 PluginConnector]: Adding new model stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 09:52:26 BoogieIcfgContainer [2019-08-05 09:52:26,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 09:52:26,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 09:52:26,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 09:52:26,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 09:52:26,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 09:52:25" (1/2) ... [2019-08-05 09:52:26,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492a67d2 and model type stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 09:52:26, skipping insertion in model container [2019-08-05 09:52:26,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 09:52:26" (2/2) ... [2019-08-05 09:52:26,312 INFO L109 eAbstractionObserver]: Analyzing ICFG stmt-multiassign-bug.bpl [2019-08-05 09:52:26,320 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 09:52:26,327 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-08-05 09:52:26,342 INFO L252 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-08-05 09:52:26,367 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 09:52:26,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 09:52:26,368 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 09:52:26,368 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 09:52:26,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 09:52:26,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 09:52:26,368 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 09:52:26,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 09:52:26,369 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 09:52:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-08-05 09:52:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-08-05 09:52:26,390 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:26,391 INFO L399 BasicCegarLoop]: trace histogram [1, 1] [2019-08-05 09:52:26,394 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash 962, now seen corresponding path program 1 times [2019-08-05 09:52:26,443 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 09:52:26,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 1 conjunts are in the unsatisfiable core [2019-08-05 09:52:26,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 09:52:26,487 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 09:52:26,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 09:52:26,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-08-05 09:52:26,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-08-05 09:52:26,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-08-05 09:52:26,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-08-05 09:52:26,506 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 2 states. [2019-08-05 09:52:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 09:52:26,519 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2019-08-05 09:52:26,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-08-05 09:52:26,520 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 2 [2019-08-05 09:52:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 09:52:26,531 INFO L225 Difference]: With dead ends: 7 [2019-08-05 09:52:26,531 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 09:52:26,533 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-08-05 09:52:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 09:52:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 09:52:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 09:52:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2019-08-05 09:52:26,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 2 [2019-08-05 09:52:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 09:52:26,563 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2019-08-05 09:52:26,563 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-08-05 09:52:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2019-08-05 09:52:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 09:52:26,564 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:26,564 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 09:52:26,564 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2019-08-05 09:52:26,566 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 09:52:26,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 09:52:26,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 09:52:26,610 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 09:52:26,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 09:52:26,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 09:52:26,612 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 09:52:26,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 09:52:26,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 09:52:26,613 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand 3 states. [2019-08-05 09:52:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 09:52:26,629 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2019-08-05 09:52:26,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 09:52:26,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 09:52:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 09:52:26,630 INFO L225 Difference]: With dead ends: 5 [2019-08-05 09:52:26,630 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 09:52:26,632 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 09:52:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 09:52:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 09:52:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 09:52:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2019-08-05 09:52:26,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2019-08-05 09:52:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 09:52:26,634 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2019-08-05 09:52:26,634 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 09:52:26,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2019-08-05 09:52:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 09:52:26,635 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 09:52:26,635 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 09:52:26,636 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-08-05 09:52:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 09:52:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2019-08-05 09:52:26,637 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 09:52:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 09:52:26,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-08-05 09:52:26,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 09:52:26,724 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 09:52:26,921 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 09:52:26,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 09:52:26,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 09:52:26,922 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 09:52:26,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 09:52:26,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 09:52:26,923 INFO L87 Difference]: Start difference. First operand 5 states and 4 transitions. Second operand 4 states. [2019-08-05 09:52:27,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 09:52:27,010 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2019-08-05 09:52:27,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 09:52:27,010 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 09:52:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 09:52:27,011 INFO L225 Difference]: With dead ends: 4 [2019-08-05 09:52:27,011 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 09:52:27,012 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 09:52:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 09:52:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 09:52:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 09:52:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 09:52:27,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2019-08-05 09:52:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 09:52:27,013 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 09:52:27,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 09:52:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 09:52:27,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 09:52:27,019 INFO L202 PluginConnector]: Adding new model stmt-multiassign-bug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 09:52:27 BoogieIcfgContainer [2019-08-05 09:52:27,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 09:52:27,023 INFO L168 Benchmark]: Toolchain (without parser) took 1108.51 ms. Allocated memory is still 140.5 MB. Free memory was 109.0 MB in the beginning and 68.8 MB in the end (delta: 40.2 MB). Peak memory consumption was 40.2 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:27,024 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 110.1 MB in the beginning and 109.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 09:52:27,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.54 ms. Allocated memory is still 140.5 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:27,026 INFO L168 Benchmark]: Boogie Preprocessor took 18.24 ms. Allocated memory is still 140.5 MB. Free memory was 107.1 MB in the beginning and 106.1 MB in the end (delta: 969.4 kB). Peak memory consumption was 969.4 kB. Max. memory is 7.1 GB. [2019-08-05 09:52:27,028 INFO L168 Benchmark]: RCFGBuilder took 338.68 ms. Allocated memory is still 140.5 MB. Free memory was 106.1 MB in the beginning and 96.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:27,029 INFO L168 Benchmark]: TraceAbstraction took 713.92 ms. Allocated memory is still 140.5 MB. Free memory was 96.4 MB in the beginning and 68.8 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2019-08-05 09:52:27,034 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 110.1 MB in the beginning and 109.8 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 33.54 ms. Allocated memory is still 140.5 MB. Free memory was 108.8 MB in the beginning and 107.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.24 ms. Allocated memory is still 140.5 MB. Free memory was 107.1 MB in the beginning and 106.1 MB in the end (delta: 969.4 kB). Peak memory consumption was 969.4 kB. Max. memory is 7.1 GB. * RCFGBuilder took 338.68 ms. Allocated memory is still 140.5 MB. Free memory was 106.1 MB in the beginning and 96.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 713.92 ms. Allocated memory is still 140.5 MB. Free memory was 96.4 MB in the beginning and 68.8 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 10]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 13]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 3 error locations. SAFE Result, 0.6s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 11 SDtfs, 4 SDslu, 1 SDs, 0 SdLazy, 3 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, 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, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 1 NumberOfNonLiveVariables, 30 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...