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/scalable/CTR_16bitCounter-correct.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:52:00,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:52:00,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:52:00,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:52:00,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:52:00,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:52:00,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:52:00,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:52:00,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:52:00,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:52:00,708 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:52:00,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:52:00,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:52:00,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:52:00,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:52:00,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:52:00,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:52:00,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:52:00,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:52:00,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:52:00,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:52:00,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:52:00,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:52:00,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:52:00,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:52:00,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:52:00,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:52:00,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:52:00,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:52:00,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:52:00,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:52:00,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:52:00,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:52:00,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:52:00,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:52:00,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:52:00,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:52:00,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:52:00,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:52:00,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:52:00,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:52:00,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:52:00,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:52:00,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:52:00,814 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:52:00,815 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:52:00,816 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/scalable/CTR_16bitCounter-correct.bpl [2019-08-05 10:52:00,817 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/scalable/CTR_16bitCounter-correct.bpl' [2019-08-05 10:52:00,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:52:00,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:52:00,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:52:00,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:52:00,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:52:00,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,908 WARN L165 Inliner]: Program contained no entry procedure! [2019-08-05 10:52:00,908 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2019-08-05 10:52:00,908 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2019-08-05 10:52:00,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:52:00,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:52:00,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:52:00,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:52:00,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/1) ... [2019-08-05 10:52:00,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:52:00,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:52:00,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:52:00,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:52:00,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (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 10:52:01,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Counter given in one single declaration [2019-08-05 10:52:01,020 INFO L130 BoogieDeclarations]: Found specification of procedure Counter [2019-08-05 10:52:01,020 INFO L138 BoogieDeclarations]: Found implementation of procedure Counter [2019-08-05 10:52:02,466 INFO L275 CfgBuilder]: Using library mode [2019-08-05 10:52:02,467 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-05 10:52:02,468 INFO L202 PluginConnector]: Adding new model CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:52:02 BoogieIcfgContainer [2019-08-05 10:52:02,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:52:02,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:52:02,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:52:02,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:52:02,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:52:00" (1/2) ... [2019-08-05 10:52:02,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312d05eb and model type CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:52:02, skipping insertion in model container [2019-08-05 10:52:02,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:52:02" (2/2) ... [2019-08-05 10:52:02,476 INFO L109 eAbstractionObserver]: Analyzing ICFG CTR_16bitCounter-correct.bpl [2019-08-05 10:52:02,486 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:52:02,496 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:52:02,513 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:52:02,538 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:52:02,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:52:02,540 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:52:02,540 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:52:02,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:52:02,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:52:02,540 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:52:02,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:52:02,541 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:52:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-08-05 10:52:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-08-05 10:52:02,563 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:52:02,564 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-08-05 10:52:02,567 INFO L418 AbstractCegarLoop]: === Iteration 1 === [CounterErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:52:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:52:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 32576, now seen corresponding path program 1 times [2019-08-05 10:52:02,621 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:52:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:52:02,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-08-05 10:52:02,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:52:02,749 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 10:52:02,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:52:02,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-08-05 10:52:02,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-08-05 10:52:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-08-05 10:52:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-08-05 10:52:02,775 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-08-05 10:52:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:52:02,859 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:52:02,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-08-05 10:52:02,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-08-05 10:52:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:52:02,871 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:52:02,872 INFO L226 Difference]: Without dead ends: 5 [2019-08-05 10:52:02,874 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 10:52:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-08-05 10:52:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-08-05 10:52:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-08-05 10:52:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2019-08-05 10:52:02,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2019-08-05 10:52:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:52:02,907 INFO L475 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2019-08-05 10:52:02,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-08-05 10:52:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2019-08-05 10:52:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:52:02,908 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:52:02,908 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:52:02,909 INFO L418 AbstractCegarLoop]: === Iteration 2 === [CounterErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:52:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:52:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1044509, now seen corresponding path program 1 times [2019-08-05 10:52:02,911 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:52:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:52:02,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2019-08-05 10:52:02,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:52:03,093 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 10:52:03,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:52:03,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:52:03,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:52:03,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:52:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:52:03,096 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2019-08-05 10:52:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:52:03,212 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2019-08-05 10:52:03,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:52:03,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:52:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:52:03,213 INFO L225 Difference]: With dead ends: 6 [2019-08-05 10:52:03,214 INFO L226 Difference]: Without dead ends: 6 [2019-08-05 10:52:03,215 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:52:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-08-05 10:52:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-08-05 10:52:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-08-05 10:52:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-08-05 10:52:03,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-08-05 10:52:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:52:03,220 INFO L475 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-08-05 10:52:03,220 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:52:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-08-05 10:52:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-08-05 10:52:03,221 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:52:03,221 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-08-05 10:52:03,221 INFO L418 AbstractCegarLoop]: === Iteration 3 === [CounterErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:52:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:52:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 32414432, now seen corresponding path program 2 times [2019-08-05 10:52:03,223 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:52:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:52:03,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-05 10:52:03,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:52:04,087 WARN L188 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-08-05 10:52:04,496 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 49 [2019-08-05 10:52:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:52:04,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:52:04,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 10:52:04,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:52:04,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:52:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:52:04,502 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2019-08-05 10:52:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:52:04,580 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 10:52:04,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:52:04,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-08-05 10:52:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:52:04,582 INFO L225 Difference]: With dead ends: 8 [2019-08-05 10:52:04,582 INFO L226 Difference]: Without dead ends: 7 [2019-08-05 10:52:04,583 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:52:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-08-05 10:52:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-08-05 10:52:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:52:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 10:52:04,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-08-05 10:52:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:52:04,586 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 10:52:04,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:52:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 10:52:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:52:04,587 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:52:04,587 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2019-08-05 10:52:04,587 INFO L418 AbstractCegarLoop]: === Iteration 4 === [CounterErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:52:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:52:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1004882045, now seen corresponding path program 3 times [2019-08-05 10:52:04,588 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:52:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:52:04,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2019-08-05 10:52:04,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:52:04,999 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2019-08-05 10:52:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:52:05,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:52:05,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:52:05,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:52:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:52:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:52:05,126 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-08-05 10:52:05,638 WARN L188 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2019-08-05 10:52:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:52:05,665 INFO L93 Difference]: Finished difference Result 5 states and 5 transitions. [2019-08-05 10:52:05,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 10:52:05,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-08-05 10:52:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:52:05,666 INFO L225 Difference]: With dead ends: 5 [2019-08-05 10:52:05,666 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:52:05,666 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-08-05 10:52:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:52:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:52:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:52:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:52:05,668 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2019-08-05 10:52:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:52:05,668 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:52:05,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:52:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:52:05,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:52:05,674 INFO L202 PluginConnector]: Adding new model CTR_16bitCounter-correct.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:52:05 BoogieIcfgContainer [2019-08-05 10:52:05,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:52:05,677 INFO L168 Benchmark]: Toolchain (without parser) took 4805.83 ms. Allocated memory was 143.1 MB in the beginning and 206.0 MB in the end (delta: 62.9 MB). Free memory was 111.5 MB in the beginning and 95.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 78.4 MB. Max. memory is 7.1 GB. [2019-08-05 10:52:05,678 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 112.7 MB in the beginning and 112.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 10:52:05,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.73 ms. Allocated memory is still 143.1 MB. Free memory was 111.3 MB in the beginning and 109.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-05 10:52:05,680 INFO L168 Benchmark]: Boogie Preprocessor took 42.39 ms. Allocated memory is still 143.1 MB. Free memory was 109.5 MB in the beginning and 108.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:52:05,682 INFO L168 Benchmark]: RCFGBuilder took 1514.68 ms. Allocated memory was 143.1 MB in the beginning and 175.6 MB in the end (delta: 32.5 MB). Free memory was 107.9 MB in the beginning and 127.5 MB in the end (delta: -19.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 7.1 GB. [2019-08-05 10:52:05,683 INFO L168 Benchmark]: TraceAbstraction took 3205.16 ms. Allocated memory was 175.6 MB in the beginning and 206.0 MB in the end (delta: 30.4 MB). Free memory was 126.8 MB in the beginning and 95.9 MB in the end (delta: 30.9 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2019-08-05 10:52:05,688 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 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 112.7 MB in the beginning and 112.5 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 36.73 ms. Allocated memory is still 143.1 MB. Free memory was 111.3 MB in the beginning and 109.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.39 ms. Allocated memory is still 143.1 MB. Free memory was 109.5 MB in the beginning and 108.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1514.68 ms. Allocated memory was 143.1 MB in the beginning and 175.6 MB in the end (delta: 32.5 MB). Free memory was 107.9 MB in the beginning and 127.5 MB in the end (delta: -19.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3205.16 ms. Allocated memory was 175.6 MB in the beginning and 206.0 MB in the end (delta: 30.4 MB). Free memory was 126.8 MB in the beginning and 95.9 MB in the end (delta: 30.9 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 89]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 10 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 36 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 1626 SizeOfPredicates, 16 NumberOfNonLiveVariables, 162 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 2/10 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...