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/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-05 10:15:40,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-05 10:15:40,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-05 10:15:40,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-05 10:15:40,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-05 10:15:40,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-05 10:15:40,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-05 10:15:40,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-05 10:15:40,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-05 10:15:40,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-05 10:15:40,993 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-05 10:15:40,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-05 10:15:40,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-05 10:15:40,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-05 10:15:40,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-05 10:15:40,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-05 10:15:40,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-05 10:15:40,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-05 10:15:41,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-05 10:15:41,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-05 10:15:41,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-05 10:15:41,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-05 10:15:41,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-05 10:15:41,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-05 10:15:41,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-05 10:15:41,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-05 10:15:41,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-05 10:15:41,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-05 10:15:41,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-05 10:15:41,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-05 10:15:41,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-05 10:15:41,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-05 10:15:41,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-05 10:15:41,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-05 10:15:41,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-05 10:15:41,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-05 10:15:41,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-05 10:15:41,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-05 10:15:41,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-05 10:15:41,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-05 10:15:41,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-05 10:15:41,062 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-05 10:15:41,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-05 10:15:41,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-05 10:15:41,078 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-05 10:15:41,079 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-05 10:15:41,079 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl [2019-08-05 10:15:41,080 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl' [2019-08-05 10:15:41,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-05 10:15:41,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-05 10:15:41,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-05 10:15:41,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-05 10:15:41,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-05 10:15:41,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-05 10:15:41,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-05 10:15:41,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-05 10:15:41,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-05 10:15:41,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/1) ... [2019-08-05 10:15:41,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-05 10:15:41,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-05 10:15:41,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-05 10:15:41,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-05 10:15:41,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (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 10:15:41,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-05 10:15:41,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-05 10:15:42,633 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-05 10:15:42,633 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-05 10:15:42,635 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:15:42 BoogieIcfgContainer [2019-08-05 10:15:42,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-05 10:15:42,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-05 10:15:42,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-05 10:15:42,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-05 10:15:42,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.08 10:15:41" (1/2) ... [2019-08-05 10:15:42,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250e1463 and model type pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.08 10:15:42, skipping insertion in model container [2019-08-05 10:15:42,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.08 10:15:42" (2/2) ... [2019-08-05 10:15:42,644 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl [2019-08-05 10:15:42,654 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-05 10:15:42,663 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-05 10:15:42,679 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-05 10:15:42,708 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-05 10:15:42,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-05 10:15:42,709 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-05 10:15:42,709 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-05 10:15:42,710 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-05 10:15:42,710 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-05 10:15:42,710 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-05 10:15:42,710 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-05 10:15:42,710 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-05 10:15:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-05 10:15:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-05 10:15:42,746 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:42,747 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-05 10:15:42,750 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:42,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1011999, now seen corresponding path program 1 times [2019-08-05 10:15:42,818 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:42,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2019-08-05 10:15:43,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:43,110 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:43,173 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 10:15:43,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-05 10:15:43,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-05 10:15:43,179 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:15:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:15:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:15:43,196 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-08-05 10:15:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:43,324 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-05 10:15:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:15:43,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-05 10:15:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:43,340 INFO L225 Difference]: With dead ends: 8 [2019-08-05 10:15:43,341 INFO L226 Difference]: Without dead ends: 8 [2019-08-05 10:15:43,345 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:15:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-05 10:15:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-08-05 10:15:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-05 10:15:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-05 10:15:43,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-08-05 10:15:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:43,383 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-05 10:15:43,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:15:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-05 10:15:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-05 10:15:43,384 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:43,385 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-08-05 10:15:43,385 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:43,386 INFO L82 PathProgramCache]: Analyzing trace with hash 972615673, now seen corresponding path program 1 times [2019-08-05 10:15:43,389 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:43,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2019-08-05 10:15:43,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:43,662 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:43,784 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:15:43,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:15:43,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-05 10:15:43,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-05 10:15:43,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-05 10:15:43,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-05 10:15:43,826 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-08-05 10:15:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:43,969 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-08-05 10:15:43,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-05 10:15:43,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-05 10:15:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:43,970 INFO L225 Difference]: With dead ends: 10 [2019-08-05 10:15:43,970 INFO L226 Difference]: Without dead ends: 10 [2019-08-05 10:15:43,972 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:15:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-05 10:15:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-08-05 10:15:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-05 10:15:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-05 10:15:43,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-08-05 10:15:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:43,975 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-05 10:15:43,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-05 10:15:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-05 10:15:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-05 10:15:43,976 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:43,976 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-08-05 10:15:43,976 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:43,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:43,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1619124141, now seen corresponding path program 2 times [2019-08-05 10:15:43,979 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:44,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-08-05 10:15:44,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:44,189 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:44,348 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:15:44,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:15:44,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-05 10:15:44,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-05 10:15:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-05 10:15:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-05 10:15:44,368 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-08-05 10:15:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:44,484 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-08-05 10:15:44,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-05 10:15:44,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-08-05 10:15:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:44,486 INFO L225 Difference]: With dead ends: 12 [2019-08-05 10:15:44,486 INFO L226 Difference]: Without dead ends: 12 [2019-08-05 10:15:44,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-08-05 10:15:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-08-05 10:15:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-08-05 10:15:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-05 10:15:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-08-05 10:15:44,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-08-05 10:15:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:44,490 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-08-05 10:15:44,490 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-05 10:15:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-08-05 10:15:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-05 10:15:44,491 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:44,491 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2019-08-05 10:15:44,492 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1200053715, now seen corresponding path program 3 times [2019-08-05 10:15:44,494 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:44,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2019-08-05 10:15:44,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:44,746 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:44,799 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:45,201 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2019-08-05 10:15:45,242 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:15:45,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:15:45,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-08-05 10:15:45,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-08-05 10:15:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-08-05 10:15:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-08-05 10:15:45,268 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2019-08-05 10:15:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:45,395 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-08-05 10:15:45,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:15:45,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-08-05 10:15:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:45,397 INFO L225 Difference]: With dead ends: 14 [2019-08-05 10:15:45,397 INFO L226 Difference]: Without dead ends: 14 [2019-08-05 10:15:45,398 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-08-05 10:15:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-08-05 10:15:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-08-05 10:15:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-05 10:15:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-08-05 10:15:45,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-08-05 10:15:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:45,402 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-08-05 10:15:45,402 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-08-05 10:15:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-08-05 10:15:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-05 10:15:45,403 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:45,403 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2019-08-05 10:15:45,403 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2094667143, now seen corresponding path program 4 times [2019-08-05 10:15:45,405 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:45,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2019-08-05 10:15:45,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:45,593 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,072 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-08-05 10:15:46,083 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,084 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,085 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,086 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,088 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,270 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,271 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,271 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,273 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,275 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:46,276 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:47,460 WARN L188 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-08-05 10:15:47,465 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-08-05 10:15:47,622 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-08-05 10:15:47,629 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:15:47,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:15:47,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-08-05 10:15:47,664 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-08-05 10:15:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-08-05 10:15:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-08-05 10:15:47,665 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2019-08-05 10:15:48,837 WARN L188 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2019-08-05 10:15:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:48,959 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-08-05 10:15:48,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-05 10:15:48,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-08-05 10:15:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:48,960 INFO L225 Difference]: With dead ends: 15 [2019-08-05 10:15:48,960 INFO L226 Difference]: Without dead ends: 15 [2019-08-05 10:15:48,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-08-05 10:15:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-08-05 10:15:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-08-05 10:15:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-08-05 10:15:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-08-05 10:15:48,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-08-05 10:15:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:48,965 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-08-05 10:15:48,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-08-05 10:15:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-08-05 10:15:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-08-05 10:15:48,966 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:48,966 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2019-08-05 10:15:48,966 INFO L418 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1364452767, now seen corresponding path program 5 times [2019-08-05 10:15:48,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:49,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 18 conjunts are in the unsatisfiable core [2019-08-05 10:15:49,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:49,322 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:49,577 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-05 10:15:49,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:15:49,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-08-05 10:15:49,609 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-08-05 10:15:49,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-08-05 10:15:49,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-08-05 10:15:49,610 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2019-08-05 10:15:49,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:49,885 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-08-05 10:15:49,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-08-05 10:15:49,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-08-05 10:15:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:49,887 INFO L225 Difference]: With dead ends: 20 [2019-08-05 10:15:49,887 INFO L226 Difference]: Without dead ends: 20 [2019-08-05 10:15:49,887 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-08-05 10:15:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-08-05 10:15:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-08-05 10:15:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-08-05 10:15:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-08-05 10:15:49,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2019-08-05 10:15:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:49,891 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-08-05 10:15:49,891 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-08-05 10:15:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-08-05 10:15:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-08-05 10:15:49,892 INFO L391 BasicCegarLoop]: Found error trace [2019-08-05 10:15:49,892 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2019-08-05 10:15:49,892 INFO L418 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-05 10:15:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-05 10:15:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -247441259, now seen corresponding path program 6 times [2019-08-05 10:15:49,894 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-05 10:15:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-05 10:15:50,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 12 conjunts are in the unsatisfiable core [2019-08-05 10:15:50,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-05 10:15:50,373 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-08-05 10:15:50,376 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:50,390 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-05 10:15:50,750 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-08-05 10:15:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-08-05 10:15:50,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-05 10:15:50,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-05 10:15:50,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-05 10:15:50,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-05 10:15:50,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:15:50,759 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 4 states. [2019-08-05 10:15:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-05 10:15:50,772 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2019-08-05 10:15:50,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-05 10:15:50,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-08-05 10:15:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-05 10:15:50,774 INFO L225 Difference]: With dead ends: 4 [2019-08-05 10:15:50,774 INFO L226 Difference]: Without dead ends: 0 [2019-08-05 10:15:50,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-05 10:15:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-05 10:15:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-05 10:15:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-05 10:15:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-05 10:15:50,776 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-08-05 10:15:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-05 10:15:50,776 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-05 10:15:50,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-05 10:15:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-05 10:15:50,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-05 10:15:50,781 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.08 10:15:50 BoogieIcfgContainer [2019-08-05 10:15:50,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-05 10:15:50,784 INFO L168 Benchmark]: Toolchain (without parser) took 9638.73 ms. Allocated memory was 133.2 MB in the beginning and 238.0 MB in the end (delta: 104.9 MB). Free memory was 107.2 MB in the beginning and 201.0 MB in the end (delta: -93.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-08-05 10:15:50,785 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-05 10:15:50,786 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.91 ms. Allocated memory is still 133.2 MB. Free memory was 107.2 MB in the beginning and 105.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-05 10:15:50,787 INFO L168 Benchmark]: Boogie Preprocessor took 56.86 ms. Allocated memory is still 133.2 MB. Free memory was 105.3 MB in the beginning and 103.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-08-05 10:15:50,788 INFO L168 Benchmark]: RCFGBuilder took 1377.09 ms. Allocated memory was 133.2 MB in the beginning and 171.4 MB in the end (delta: 38.3 MB). Free memory was 103.7 MB in the beginning and 136.3 MB in the end (delta: -32.5 MB). Peak memory consumption was 49.9 MB. Max. memory is 7.1 GB. [2019-08-05 10:15:50,789 INFO L168 Benchmark]: TraceAbstraction took 8144.76 ms. Allocated memory was 171.4 MB in the beginning and 238.0 MB in the end (delta: 66.6 MB). Free memory was 135.5 MB in the beginning and 201.0 MB in the end (delta: -65.5 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-08-05 10:15:50,793 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 109.7 MB in the beginning and 109.5 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 54.91 ms. Allocated memory is still 133.2 MB. Free memory was 107.2 MB in the beginning and 105.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.86 ms. Allocated memory is still 133.2 MB. Free memory was 105.3 MB in the beginning and 103.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1377.09 ms. Allocated memory was 133.2 MB in the beginning and 171.4 MB in the end (delta: 38.3 MB). Free memory was 103.7 MB in the beginning and 136.3 MB in the end (delta: -32.5 MB). Peak memory consumption was 49.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8144.76 ms. Allocated memory was 171.4 MB in the beginning and 238.0 MB in the end (delta: 66.6 MB). Free memory was 135.5 MB in the beginning and 201.0 MB in the end (delta: -65.5 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 543]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. SAFE Result, 8.0s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 21 SDslu, 51 SDs, 0 SdLazy, 197 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=6, 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, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 65 ConstructedInterpolants, 8 QuantifiedInterpolants, 12183 SizeOfPredicates, 134 NumberOfNonLiveVariables, 2235 ConjunctsInSsa, 122 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 61/126 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...