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.5.ufo.UNBOUNDED.pals.c_11.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b8c145f [2019-08-04 21:37:29,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-04 21:37:29,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-04 21:37:29,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-04 21:37:29,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-04 21:37:29,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-04 21:37:29,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-04 21:37:29,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-04 21:37:29,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-04 21:37:29,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-04 21:37:29,826 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-04 21:37:29,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-04 21:37:29,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-04 21:37:29,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-04 21:37:29,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-04 21:37:29,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-04 21:37:29,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-04 21:37:29,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-04 21:37:29,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-04 21:37:29,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-04 21:37:29,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-04 21:37:29,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-04 21:37:29,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-04 21:37:29,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-04 21:37:29,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-04 21:37:29,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-04 21:37:29,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-04 21:37:29,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-04 21:37:29,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-04 21:37:29,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-04 21:37:29,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-04 21:37:29,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-04 21:37:29,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-04 21:37:29,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-04 21:37:29,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-04 21:37:29,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-04 21:37:29,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-04 21:37:29,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-04 21:37:29,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-04 21:37:29,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-04 21:37:29,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-04 21:37:29,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-04 21:37:29,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-04 21:37:29,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-04 21:37:29,896 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-04 21:37:29,896 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-04 21:37:29,897 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl [2019-08-04 21:37:29,897 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl' [2019-08-04 21:37:29,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-04 21:37:29,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-04 21:37:29,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-08-04 21:37:29,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-08-04 21:37:29,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-08-04 21:37:29,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-08-04 21:37:30,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-04 21:37:30,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-04 21:37:30,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-04 21:37:30,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/1) ... [2019-08-04 21:37:30,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-04 21:37:30,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-04 21:37:30,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-04 21:37:30,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-04 21:37:30,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (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 [2019-08-04 21:37:30,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-04 21:37:30,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-04 21:37:31,336 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-04 21:37:31,336 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-04 21:37:31,338 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:37:31 BoogieIcfgContainer [2019-08-04 21:37:31,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-04 21:37:31,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-08-04 21:37:31,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-08-04 21:37:31,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-08-04 21:37:31,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.08 09:37:29" (1/2) ... [2019-08-04 21:37:31,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789aeaf8 and model type pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:37:31, skipping insertion in model container [2019-08-04 21:37:31,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:37:31" (2/2) ... [2019-08-04 21:37:31,347 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl [2019-08-04 21:37:31,357 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2019-08-04 21:37:31,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-08-04 21:37:31,387 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-08-04 21:37:31,421 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-08-04 21:37:31,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-08-04 21:37:31,422 INFO L378 AbstractCegarLoop]: Hoare is false [2019-08-04 21:37:31,422 INFO L379 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2019-08-04 21:37:31,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-08-04 21:37:31,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-08-04 21:37:31,423 INFO L382 AbstractCegarLoop]: Difference is false [2019-08-04 21:37:31,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-08-04 21:37:31,423 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-08-04 21:37:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-08-04 21:37:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-08-04 21:37:31,456 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:31,457 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-08-04 21:37:31,460 INFO L418 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:31,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1001172, now seen corresponding path program 1 times [2019-08-04 21:37:31,534 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:31,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2019-08-04 21:37:31,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:31,857 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:31,859 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:31,889 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:31,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-08-04 21:37:31,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-08-04 21:37:31,984 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:37:32,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:37:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:37:32,006 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 4 states. [2019-08-04 21:37:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:32,137 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2019-08-04 21:37:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:37:32,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-08-04 21:37:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:32,148 INFO L225 Difference]: With dead ends: 8 [2019-08-04 21:37:32,149 INFO L226 Difference]: Without dead ends: 8 [2019-08-04 21:37:32,151 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 [2019-08-04 21:37:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-08-04 21:37:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-08-04 21:37:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-08-04 21:37:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-08-04 21:37:32,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-08-04 21:37:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:32,187 INFO L475 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-08-04 21:37:32,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:37:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-08-04 21:37:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-08-04 21:37:32,188 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:32,188 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-08-04 21:37:32,189 INFO L418 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash 962207787, now seen corresponding path program 1 times [2019-08-04 21:37:32,197 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:32,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2019-08-04 21:37:32,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:32,402 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:32,549 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:32,563 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:32,578 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:32,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:32,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-08-04 21:37:32,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-08-04 21:37:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-08-04 21:37:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-08-04 21:37:32,650 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-08-04 21:37:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:32,790 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-08-04 21:37:32,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-08-04 21:37:32,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-08-04 21:37:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:32,792 INFO L225 Difference]: With dead ends: 10 [2019-08-04 21:37:32,792 INFO L226 Difference]: Without dead ends: 10 [2019-08-04 21:37:32,793 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 [2019-08-04 21:37:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-08-04 21:37:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-08-04 21:37:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-08-04 21:37:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-08-04 21:37:32,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-08-04 21:37:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:32,796 INFO L475 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-08-04 21:37:32,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-08-04 21:37:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-08-04 21:37:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-08-04 21:37:32,796 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:32,797 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-08-04 21:37:32,797 INFO L418 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1263796162, now seen corresponding path program 2 times [2019-08-04 21:37:32,800 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:32,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 16 conjunts are in the unsatisfiable core [2019-08-04 21:37:32,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:33,014 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,286 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2019-08-04 21:37:33,373 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,374 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,383 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:33,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:33,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-08-04 21:37:33,410 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-08-04 21:37:33,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-08-04 21:37:33,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-08-04 21:37:33,411 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-08-04 21:37:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:33,562 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-08-04 21:37:33,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-08-04 21:37:33,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-08-04 21:37:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:33,563 INFO L225 Difference]: With dead ends: 12 [2019-08-04 21:37:33,563 INFO L226 Difference]: Without dead ends: 12 [2019-08-04 21:37:33,564 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-08-04 21:37:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-08-04 21:37:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-08-04 21:37:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-08-04 21:37:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-08-04 21:37:33,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-08-04 21:37:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:33,568 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-08-04 21:37:33,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-08-04 21:37:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-08-04 21:37:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-08-04 21:37:33,569 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:33,569 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2019-08-04 21:37:33,569 INFO L418 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash -967551591, now seen corresponding path program 3 times [2019-08-04 21:37:33,572 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:33,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjunts are in the unsatisfiable core [2019-08-04 21:37:33,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:33,832 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,123 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-08-04 21:37:34,388 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2019-08-04 21:37:34,403 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,424 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,428 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:34,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:34,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-08-04 21:37:34,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-08-04 21:37:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-08-04 21:37:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-08-04 21:37:34,468 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2019-08-04 21:37:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:34,628 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-08-04 21:37:34,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-08-04 21:37:34,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-08-04 21:37:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:34,629 INFO L225 Difference]: With dead ends: 14 [2019-08-04 21:37:34,630 INFO L226 Difference]: Without dead ends: 14 [2019-08-04 21:37:34,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-08-04 21:37:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-08-04 21:37:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-08-04 21:37:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-08-04 21:37:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-08-04 21:37:34,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-08-04 21:37:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:34,634 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-08-04 21:37:34,635 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-08-04 21:37:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-08-04 21:37:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-08-04 21:37:34,635 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:34,635 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2019-08-04 21:37:34,636 INFO L418 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2104061520, now seen corresponding path program 4 times [2019-08-04 21:37:34,638 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:34,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2019-08-04 21:37:34,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:34,861 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,054 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,056 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,059 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:35,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:35,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-08-04 21:37:35,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-08-04 21:37:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-08-04 21:37:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-08-04 21:37:35,076 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-08-04 21:37:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:35,422 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-08-04 21:37:35,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-08-04 21:37:35,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-08-04 21:37:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:35,423 INFO L225 Difference]: With dead ends: 16 [2019-08-04 21:37:35,423 INFO L226 Difference]: Without dead ends: 16 [2019-08-04 21:37:35,424 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-08-04 21:37:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-08-04 21:37:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-08-04 21:37:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-08-04 21:37:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-08-04 21:37:35,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-08-04 21:37:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:35,427 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-08-04 21:37:35,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-08-04 21:37:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-08-04 21:37:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-08-04 21:37:35,428 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:35,428 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2019-08-04 21:37:35,429 INFO L418 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash 926557191, now seen corresponding path program 5 times [2019-08-04 21:37:35,431 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:35,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2019-08-04 21:37:35,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:35,759 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:35,956 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-08-04 21:37:36,162 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-08-04 21:37:36,358 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:36,367 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:36,369 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:36,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:36,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-08-04 21:37:36,388 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-08-04 21:37:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-08-04 21:37:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-08-04 21:37:36,389 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2019-08-04 21:37:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:37:48,842 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-08-04 21:37:48,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-08-04 21:37:48,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-08-04 21:37:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:37:48,843 INFO L225 Difference]: With dead ends: 18 [2019-08-04 21:37:48,843 INFO L226 Difference]: Without dead ends: 18 [2019-08-04 21:37:48,843 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-08-04 21:37:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-08-04 21:37:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-08-04 21:37:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-08-04 21:37:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-08-04 21:37:48,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-08-04 21:37:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:37:48,847 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-08-04 21:37:48,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-08-04 21:37:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-08-04 21:37:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-08-04 21:37:48,848 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:37:48,848 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2019-08-04 21:37:48,849 INFO L418 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:37:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:37:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1363311774, now seen corresponding path program 6 times [2019-08-04 21:37:48,850 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:37:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:37:49,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 21 conjunts are in the unsatisfiable core [2019-08-04 21:37:49,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:37:49,142 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:49,344 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-08-04 21:37:49,557 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:49,557 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:49,562 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:37:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-08-04 21:37:49,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:37:49,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-08-04 21:37:49,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-08-04 21:37:49,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-08-04 21:37:49,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-08-04 21:37:49,584 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2019-08-04 21:38:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:02,555 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-08-04 21:38:02,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-08-04 21:38:02,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-08-04 21:38:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:02,556 INFO L225 Difference]: With dead ends: 20 [2019-08-04 21:38:02,556 INFO L226 Difference]: Without dead ends: 20 [2019-08-04 21:38:02,557 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-08-04 21:38:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-08-04 21:38:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-08-04 21:38:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-08-04 21:38:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-08-04 21:38:02,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-08-04 21:38:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:02,561 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-08-04 21:38:02,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-08-04 21:38:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-08-04 21:38:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-08-04 21:38:02,562 INFO L391 BasicCegarLoop]: Found error trace [2019-08-04 21:38:02,562 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2019-08-04 21:38:02,563 INFO L418 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-08-04 21:38:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-08-04 21:38:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash 177671029, now seen corresponding path program 7 times [2019-08-04 21:38:02,564 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2019-08-04 21:38:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-08-04 21:38:02,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjunts are in the unsatisfiable core [2019-08-04 21:38:02,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-08-04 21:38:02,851 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-08-04 21:38:02,853 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:38:02,857 INFO L320 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-08-04 21:38:03,038 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-08-04 21:38:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-08-04 21:38:03,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-08-04 21:38:03,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2019-08-04 21:38:03,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-08-04 21:38:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-08-04 21:38:03,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:38:03,067 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 4 states. [2019-08-04 21:38:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-08-04 21:38:03,105 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2019-08-04 21:38:03,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-08-04 21:38:03,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-08-04 21:38:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-08-04 21:38:03,106 INFO L225 Difference]: With dead ends: 4 [2019-08-04 21:38:03,106 INFO L226 Difference]: Without dead ends: 0 [2019-08-04 21:38:03,107 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-08-04 21:38:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-08-04 21:38:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-08-04 21:38:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-08-04 21:38:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-08-04 21:38:03,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-08-04 21:38:03,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-08-04 21:38:03,108 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-08-04 21:38:03,108 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-08-04 21:38:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-08-04 21:38:03,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-08-04 21:38:03,114 INFO L202 PluginConnector]: Adding new model pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c_11.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:38:03 BoogieIcfgContainer [2019-08-04 21:38:03,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-08-04 21:38:03,116 INFO L168 Benchmark]: Toolchain (without parser) took 33144.90 ms. Allocated memory was 134.7 MB in the beginning and 229.6 MB in the end (delta: 94.9 MB). Free memory was 109.9 MB in the beginning and 149.2 MB in the end (delta: -39.3 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:03,117 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 134.7 MB. Free memory is still 112.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-04 21:38:03,117 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.21 ms. Allocated memory is still 134.7 MB. Free memory was 109.9 MB in the beginning and 108.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:03,118 INFO L168 Benchmark]: Boogie Preprocessor took 61.10 ms. Allocated memory is still 134.7 MB. Free memory was 108.2 MB in the beginning and 106.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:03,119 INFO L168 Benchmark]: RCFGBuilder took 1258.25 ms. Allocated memory was 134.7 MB in the beginning and 169.3 MB in the end (delta: 34.6 MB). Free memory was 106.5 MB in the beginning and 141.7 MB in the end (delta: -35.2 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:03,120 INFO L168 Benchmark]: TraceAbstraction took 31774.69 ms. Allocated memory was 169.3 MB in the beginning and 229.6 MB in the end (delta: 60.3 MB). Free memory was 141.7 MB in the beginning and 149.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2019-08-04 21:38:03,124 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 0.21 ms. Allocated memory is still 134.7 MB. Free memory is still 112.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.21 ms. Allocated memory is still 134.7 MB. Free memory was 109.9 MB in the beginning and 108.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.10 ms. Allocated memory is still 134.7 MB. Free memory was 108.2 MB in the beginning and 106.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1258.25 ms. Allocated memory was 134.7 MB in the beginning and 169.3 MB in the end (delta: 34.6 MB). Free memory was 106.5 MB in the beginning and 141.7 MB in the end (delta: -35.2 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31774.69 ms. Allocated memory was 169.3 MB in the beginning and 229.6 MB in the end (delta: 60.3 MB). Free memory was 141.7 MB in the beginning and 149.2 MB in the end (delta: -7.6 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 463]: 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, 31.7s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 26.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 28 SDslu, 71 SDs, 0 SdLazy, 306 SolverSat, 21 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 25.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=7, 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, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 80 ConstructedInterpolants, 32 QuantifiedInterpolants, 20579 SizeOfPredicates, 176 NumberOfNonLiveVariables, 2216 ConjunctsInSsa, 129 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 55/168 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...