java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/array3_false-valid-deref.i_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b8f97f7-m [2018-10-10 15:28:06,025 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 15:28:06,028 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 15:28:06,046 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 15:28:06,046 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 15:28:06,047 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 15:28:06,048 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 15:28:06,050 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 15:28:06,052 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 15:28:06,053 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 15:28:06,054 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 15:28:06,054 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 15:28:06,055 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 15:28:06,056 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 15:28:06,057 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 15:28:06,058 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 15:28:06,059 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 15:28:06,061 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 15:28:06,063 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 15:28:06,064 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 15:28:06,066 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 15:28:06,070 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 15:28:06,073 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-10 15:28:06,074 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-10 15:28:06,074 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-10 15:28:06,075 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-10 15:28:06,076 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-10 15:28:06,077 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-10 15:28:06,078 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-10 15:28:06,082 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-10 15:28:06,082 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-10 15:28:06,083 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-10 15:28:06,085 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-10 15:28:06,103 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 15:28:06,104 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 15:28:06,105 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-10 15:28:06,106 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-10 15:28:06,106 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-10 15:28:06,106 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-10 15:28:06,107 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 15:28:06,107 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-10 15:28:06,108 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 15:28:06,108 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-10 15:28:06,108 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-10 15:28:06,109 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-10 15:28:06,109 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-10 15:28:06,110 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-10 15:28:06,110 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-10 15:28:06,163 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 15:28:06,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 15:28:06,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 15:28:06,183 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-10 15:28:06,183 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-10 15:28:06,184 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/array3_false-valid-deref.i_6.bpl [2018-10-10 15:28:06,184 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/array3_false-valid-deref.i_6.bpl' [2018-10-10 15:28:06,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 15:28:06,264 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-10 15:28:06,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 15:28:06,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 15:28:06,265 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 15:28:06,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/1) ... [2018-10-10 15:28:06,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 15:28:06,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 15:28:06,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 15:28:06,331 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 15:28:06,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (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 [2018-10-10 15:28:06,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-10 15:28:06,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 15:28:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 15:28:06,793 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 15:28:06,794 INFO L202 PluginConnector]: Adding new model array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:28:06 BoogieIcfgContainer [2018-10-10 15:28:06,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 15:28:06,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 15:28:06,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 15:28:06,799 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 15:28:06,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.10 03:28:06" (1/2) ... [2018-10-10 15:28:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69233e3 and model type array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 03:28:06, skipping insertion in model container [2018-10-10 15:28:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3_false-valid-deref.i_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 03:28:06" (2/2) ... [2018-10-10 15:28:06,803 INFO L112 eAbstractionObserver]: Analyzing ICFG array3_false-valid-deref.i_6.bpl [2018-10-10 15:28:06,813 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-10 15:28:06,821 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-10 15:28:06,839 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-10 15:28:06,868 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 15:28:06,869 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 15:28:06,869 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 15:28:06,869 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-10 15:28:06,869 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 15:28:06,869 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 15:28:06,870 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 15:28:06,870 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 15:28:06,870 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 15:28:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-10-10 15:28:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-10 15:28:06,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:06,898 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:06,899 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:06,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 192870681, now seen corresponding path program 1 times [2018-10-10 15:28:06,968 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:07,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 15:28:07,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-10 15:28:07,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-10 15:28:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-10 15:28:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-10 15:28:07,459 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 9 states. [2018-10-10 15:28:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:08,100 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-10 15:28:08,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-10 15:28:08,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-10-10 15:28:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:08,115 INFO L225 Difference]: With dead ends: 46 [2018-10-10 15:28:08,116 INFO L226 Difference]: Without dead ends: 46 [2018-10-10 15:28:08,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2018-10-10 15:28:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-10 15:28:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2018-10-10 15:28:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-10 15:28:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-10 15:28:08,158 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 24 [2018-10-10 15:28:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:08,158 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-10 15:28:08,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-10 15:28:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-10 15:28:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-10 15:28:08,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:08,161 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:08,161 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:08,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1874644339, now seen corresponding path program 1 times [2018-10-10 15:28:08,163 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:08,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:08,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-10 15:28:08,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-10 15:28:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-10 15:28:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-10 15:28:08,512 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 10 states. [2018-10-10 15:28:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:09,356 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-10 15:28:09,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-10 15:28:09,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-10-10 15:28:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:09,359 INFO L225 Difference]: With dead ends: 65 [2018-10-10 15:28:09,359 INFO L226 Difference]: Without dead ends: 65 [2018-10-10 15:28:09,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-10-10 15:28:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-10 15:28:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2018-10-10 15:28:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-10 15:28:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-10 15:28:09,369 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 38 [2018-10-10 15:28:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:09,369 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-10 15:28:09,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-10 15:28:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-10 15:28:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-10 15:28:09,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:09,371 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:09,372 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:09,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1822977, now seen corresponding path program 2 times [2018-10-10 15:28:09,373 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:09,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:09,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-10 15:28:09,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-10 15:28:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-10 15:28:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-10-10 15:28:09,805 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 12 states. [2018-10-10 15:28:10,907 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-10 15:28:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:11,188 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-10 15:28:11,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-10 15:28:11,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-10 15:28:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:11,193 INFO L225 Difference]: With dead ends: 79 [2018-10-10 15:28:11,193 INFO L226 Difference]: Without dead ends: 79 [2018-10-10 15:28:11,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2018-10-10 15:28:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-10 15:28:11,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2018-10-10 15:28:11,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-10 15:28:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-10 15:28:11,202 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 52 [2018-10-10 15:28:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:11,203 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-10 15:28:11,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-10 15:28:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-10 15:28:11,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-10 15:28:11,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:11,205 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:11,206 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:11,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash -118221707, now seen corresponding path program 3 times [2018-10-10 15:28:11,207 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:11,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:11,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-10 15:28:11,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-10 15:28:11,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-10 15:28:11,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2018-10-10 15:28:11,690 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 16 states. [2018-10-10 15:28:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:12,853 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-10 15:28:12,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-10 15:28:12,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2018-10-10 15:28:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:12,856 INFO L225 Difference]: With dead ends: 93 [2018-10-10 15:28:12,856 INFO L226 Difference]: Without dead ends: 93 [2018-10-10 15:28:12,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:28:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-10 15:28:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2018-10-10 15:28:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-10 15:28:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-10 15:28:12,865 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 66 [2018-10-10 15:28:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:12,866 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-10 15:28:12,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-10 15:28:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-10 15:28:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-10 15:28:12,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:12,868 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:12,868 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:12,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1140376343, now seen corresponding path program 4 times [2018-10-10 15:28:12,870 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:13,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:13,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-10 15:28:13,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-10 15:28:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-10 15:28:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-10-10 15:28:13,392 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 16 states. [2018-10-10 15:28:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:14,361 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-10 15:28:14,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-10 15:28:14,369 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-10-10 15:28:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:14,370 INFO L225 Difference]: With dead ends: 107 [2018-10-10 15:28:14,371 INFO L226 Difference]: Without dead ends: 107 [2018-10-10 15:28:14,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2018-10-10 15:28:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-10 15:28:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2018-10-10 15:28:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-10 15:28:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-10 15:28:14,381 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 80 [2018-10-10 15:28:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:14,381 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-10 15:28:14,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-10 15:28:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-10 15:28:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-10 15:28:14,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:14,383 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:14,383 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:14,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash 568363613, now seen corresponding path program 5 times [2018-10-10 15:28:14,385 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:15,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:15,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-10 15:28:15,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-10 15:28:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-10 15:28:15,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2018-10-10 15:28:15,523 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 18 states. [2018-10-10 15:28:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:17,262 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-10 15:28:17,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-10 15:28:17,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2018-10-10 15:28:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:17,267 INFO L225 Difference]: With dead ends: 121 [2018-10-10 15:28:17,267 INFO L226 Difference]: Without dead ends: 121 [2018-10-10 15:28:17,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 15:28:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-10 15:28:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2018-10-10 15:28:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-10 15:28:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-10 15:28:17,283 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 94 [2018-10-10 15:28:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:17,284 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-10 15:28:17,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-10 15:28:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-10 15:28:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-10 15:28:17,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:17,286 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:17,286 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:17,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1906623279, now seen corresponding path program 6 times [2018-10-10 15:28:17,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:17,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:17,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-10 15:28:17,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-10 15:28:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-10 15:28:17,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-10-10 15:28:17,761 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 20 states. [2018-10-10 15:28:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:19,494 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-10 15:28:19,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-10 15:28:19,495 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2018-10-10 15:28:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:19,496 INFO L225 Difference]: With dead ends: 135 [2018-10-10 15:28:19,496 INFO L226 Difference]: Without dead ends: 135 [2018-10-10 15:28:19,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2018-10-10 15:28:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-10 15:28:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2018-10-10 15:28:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-10 15:28:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-10 15:28:19,507 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 108 [2018-10-10 15:28:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:19,508 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-10 15:28:19,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-10 15:28:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-10 15:28:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-10 15:28:19,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:19,510 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:19,511 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:19,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -459107259, now seen corresponding path program 7 times [2018-10-10 15:28:19,512 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:20,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:20,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-10 15:28:20,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-10 15:28:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-10 15:28:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2018-10-10 15:28:20,323 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 22 states. [2018-10-10 15:28:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:22,020 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-10 15:28:22,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-10 15:28:22,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 122 [2018-10-10 15:28:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:22,023 INFO L225 Difference]: With dead ends: 149 [2018-10-10 15:28:22,023 INFO L226 Difference]: Without dead ends: 149 [2018-10-10 15:28:22,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=1940, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:28:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-10 15:28:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2018-10-10 15:28:22,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-10 15:28:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-10 15:28:22,034 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 122 [2018-10-10 15:28:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:22,035 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-10 15:28:22,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-10 15:28:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-10 15:28:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-10 15:28:22,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:22,037 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:22,037 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:22,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:22,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2066862265, now seen corresponding path program 8 times [2018-10-10 15:28:22,038 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:22,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:22,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-10 15:28:22,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-10 15:28:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-10 15:28:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2018-10-10 15:28:22,595 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 24 states. [2018-10-10 15:28:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:24,927 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-10 15:28:24,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-10 15:28:24,930 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 136 [2018-10-10 15:28:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:24,931 INFO L225 Difference]: With dead ends: 163 [2018-10-10 15:28:24,931 INFO L226 Difference]: Without dead ends: 163 [2018-10-10 15:28:24,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2018-10-10 15:28:24,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-10 15:28:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2018-10-10 15:28:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-10 15:28:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-10 15:28:24,940 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 136 [2018-10-10 15:28:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:24,941 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-10 15:28:24,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-10 15:28:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-10 15:28:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-10 15:28:24,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:24,943 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:24,944 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:24,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 265564717, now seen corresponding path program 9 times [2018-10-10 15:28:24,945 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:25,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:25,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-10 15:28:25,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-10 15:28:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-10 15:28:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2018-10-10 15:28:25,679 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 26 states. [2018-10-10 15:28:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:28,581 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-10 15:28:28,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-10 15:28:28,587 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 150 [2018-10-10 15:28:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:28,588 INFO L225 Difference]: With dead ends: 177 [2018-10-10 15:28:28,588 INFO L226 Difference]: Without dead ends: 177 [2018-10-10 15:28:28,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=2916, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 15:28:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-10 15:28:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2018-10-10 15:28:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-10 15:28:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-10 15:28:28,597 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 150 [2018-10-10 15:28:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:28,597 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-10 15:28:28,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-10 15:28:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-10 15:28:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-10 15:28:28,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:28,600 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:28,600 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:28,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:28,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1146816351, now seen corresponding path program 10 times [2018-10-10 15:28:28,601 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 690 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:29,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:29,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-10 15:28:29,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-10 15:28:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-10 15:28:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2018-10-10 15:28:29,536 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 28 states. [2018-10-10 15:28:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:32,239 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-10 15:28:32,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-10 15:28:32,242 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 164 [2018-10-10 15:28:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:32,243 INFO L225 Difference]: With dead ends: 191 [2018-10-10 15:28:32,243 INFO L226 Difference]: Without dead ends: 191 [2018-10-10 15:28:32,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=427, Invalid=3479, Unknown=0, NotChecked=0, Total=3906 [2018-10-10 15:28:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-10 15:28:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2018-10-10 15:28:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-10 15:28:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-10 15:28:32,248 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 164 [2018-10-10 15:28:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:32,249 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-10 15:28:32,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-10 15:28:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-10 15:28:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-10 15:28:32,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:32,251 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:32,251 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:32,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash -418421739, now seen corresponding path program 11 times [2018-10-10 15:28:32,252 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:33,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:33,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-10 15:28:33,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-10 15:28:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-10 15:28:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2018-10-10 15:28:33,630 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 30 states. [2018-10-10 15:28:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:36,792 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-10 15:28:36,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-10 15:28:36,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 178 [2018-10-10 15:28:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:36,795 INFO L225 Difference]: With dead ends: 205 [2018-10-10 15:28:36,795 INFO L226 Difference]: Without dead ends: 205 [2018-10-10 15:28:36,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=464, Invalid=4092, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:28:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-10 15:28:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2018-10-10 15:28:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-10 15:28:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-10 15:28:36,802 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 178 [2018-10-10 15:28:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:36,802 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-10 15:28:36,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-10 15:28:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-10 15:28:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-10 15:28:36,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:36,804 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:36,804 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:36,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1036956809, now seen corresponding path program 12 times [2018-10-10 15:28:36,805 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 0 proven. 996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:38,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:38,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-10 15:28:38,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-10 15:28:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-10 15:28:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2018-10-10 15:28:38,243 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 32 states. [2018-10-10 15:28:39,302 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-10 15:28:42,100 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-10-10 15:28:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:42,472 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-10 15:28:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-10 15:28:42,472 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 192 [2018-10-10 15:28:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:42,475 INFO L225 Difference]: With dead ends: 219 [2018-10-10 15:28:42,475 INFO L226 Difference]: Without dead ends: 219 [2018-10-10 15:28:42,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=501, Invalid=4755, Unknown=0, NotChecked=0, Total=5256 [2018-10-10 15:28:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-10 15:28:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 207. [2018-10-10 15:28:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-10 15:28:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-10 15:28:42,482 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 192 [2018-10-10 15:28:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:42,482 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-10 15:28:42,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-10 15:28:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-10 15:28:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-10 15:28:42,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:42,484 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:42,484 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:42,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1561449987, now seen corresponding path program 13 times [2018-10-10 15:28:42,485 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 1170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:43,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:43,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-10 15:28:43,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-10 15:28:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-10 15:28:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2018-10-10 15:28:43,631 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 34 states. [2018-10-10 15:28:45,961 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-10-10 15:28:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:48,147 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-10-10 15:28:48,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-10 15:28:48,148 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 206 [2018-10-10 15:28:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:48,149 INFO L225 Difference]: With dead ends: 233 [2018-10-10 15:28:48,149 INFO L226 Difference]: Without dead ends: 233 [2018-10-10 15:28:48,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=538, Invalid=5468, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 15:28:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-10 15:28:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2018-10-10 15:28:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-10 15:28:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-10 15:28:48,156 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 206 [2018-10-10 15:28:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:48,156 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-10 15:28:48,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-10 15:28:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-10 15:28:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-10 15:28:48,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:48,158 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:48,158 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:48,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 617153649, now seen corresponding path program 14 times [2018-10-10 15:28:48,159 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:49,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:49,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-10 15:28:49,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-10 15:28:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-10 15:28:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2018-10-10 15:28:49,716 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 36 states. [2018-10-10 15:28:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:28:54,275 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-10 15:28:54,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-10 15:28:54,275 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 220 [2018-10-10 15:28:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:28:54,277 INFO L225 Difference]: With dead ends: 247 [2018-10-10 15:28:54,278 INFO L226 Difference]: Without dead ends: 247 [2018-10-10 15:28:54,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=575, Invalid=6231, Unknown=0, NotChecked=0, Total=6806 [2018-10-10 15:28:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-10 15:28:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 235. [2018-10-10 15:28:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-10 15:28:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-10-10 15:28:54,285 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 220 [2018-10-10 15:28:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:28:54,285 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-10-10 15:28:54,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-10 15:28:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-10-10 15:28:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-10 15:28:54,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:28:54,286 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:28:54,287 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:28:54,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:28:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash -250969115, now seen corresponding path program 15 times [2018-10-10 15:28:54,288 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:28:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:28:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:28:55,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:28:55,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-10 15:28:55,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-10 15:28:55,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-10 15:28:55,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2018-10-10 15:28:55,596 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 38 states. [2018-10-10 15:29:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:00,690 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-10 15:29:00,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-10 15:29:00,690 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 234 [2018-10-10 15:29:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:00,693 INFO L225 Difference]: With dead ends: 261 [2018-10-10 15:29:00,693 INFO L226 Difference]: Without dead ends: 261 [2018-10-10 15:29:00,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=612, Invalid=7044, Unknown=0, NotChecked=0, Total=7656 [2018-10-10 15:29:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-10 15:29:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 249. [2018-10-10 15:29:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-10 15:29:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-10-10 15:29:00,700 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 234 [2018-10-10 15:29:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:00,701 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-10-10 15:29:00,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-10 15:29:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-10-10 15:29:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-10 15:29:00,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:00,702 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:00,703 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:00,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1219356761, now seen corresponding path program 16 times [2018-10-10 15:29:00,704 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:02,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:02,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-10 15:29:02,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-10 15:29:02,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-10 15:29:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2018-10-10 15:29:02,101 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 40 states. [2018-10-10 15:29:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:07,693 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-10-10 15:29:07,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-10 15:29:07,694 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 248 [2018-10-10 15:29:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:07,696 INFO L225 Difference]: With dead ends: 275 [2018-10-10 15:29:07,696 INFO L226 Difference]: Without dead ends: 275 [2018-10-10 15:29:07,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=649, Invalid=7907, Unknown=0, NotChecked=0, Total=8556 [2018-10-10 15:29:07,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-10 15:29:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 263. [2018-10-10 15:29:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-10 15:29:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-10 15:29:07,704 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 248 [2018-10-10 15:29:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:07,704 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-10 15:29:07,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-10 15:29:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-10 15:29:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-10 15:29:07,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:07,706 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:07,706 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:07,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1946055117, now seen corresponding path program 17 times [2018-10-10 15:29:07,707 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 0 proven. 2006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:09,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:09,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-10 15:29:09,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-10 15:29:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-10 15:29:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2018-10-10 15:29:09,228 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 42 states. [2018-10-10 15:29:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:15,630 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-10 15:29:15,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-10 15:29:15,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 262 [2018-10-10 15:29:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:15,636 INFO L225 Difference]: With dead ends: 289 [2018-10-10 15:29:15,636 INFO L226 Difference]: Without dead ends: 289 [2018-10-10 15:29:15,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=686, Invalid=8820, Unknown=0, NotChecked=0, Total=9506 [2018-10-10 15:29:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-10-10 15:29:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 277. [2018-10-10 15:29:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-10 15:29:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-10-10 15:29:15,642 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 262 [2018-10-10 15:29:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:15,643 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-10-10 15:29:15,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-10 15:29:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-10-10 15:29:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-10 15:29:15,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:15,645 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:15,645 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:15,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1231593407, now seen corresponding path program 18 times [2018-10-10 15:29:15,646 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2250 backedges. 0 proven. 2250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:17,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:17,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-10 15:29:17,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-10 15:29:17,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-10 15:29:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2018-10-10 15:29:17,618 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 44 states. [2018-10-10 15:29:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:24,289 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-10-10 15:29:24,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-10 15:29:24,289 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 276 [2018-10-10 15:29:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:24,292 INFO L225 Difference]: With dead ends: 303 [2018-10-10 15:29:24,292 INFO L226 Difference]: Without dead ends: 303 [2018-10-10 15:29:24,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=723, Invalid=9783, Unknown=0, NotChecked=0, Total=10506 [2018-10-10 15:29:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-10 15:29:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 291. [2018-10-10 15:29:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-10 15:29:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-10-10 15:29:24,299 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 276 [2018-10-10 15:29:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:24,299 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-10-10 15:29:24,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-10 15:29:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-10-10 15:29:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-10 15:29:24,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:24,301 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:24,301 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:24,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1130623925, now seen corresponding path program 19 times [2018-10-10 15:29:24,303 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2508 backedges. 0 proven. 2508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:26,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:26,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-10 15:29:26,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-10 15:29:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-10 15:29:26,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2018-10-10 15:29:26,707 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 46 states. [2018-10-10 15:29:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:34,672 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-10-10 15:29:34,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-10 15:29:34,672 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 290 [2018-10-10 15:29:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:34,675 INFO L225 Difference]: With dead ends: 317 [2018-10-10 15:29:34,675 INFO L226 Difference]: Without dead ends: 317 [2018-10-10 15:29:34,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=760, Invalid=10796, Unknown=0, NotChecked=0, Total=11556 [2018-10-10 15:29:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-10-10 15:29:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 305. [2018-10-10 15:29:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-10 15:29:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-10-10 15:29:34,681 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 290 [2018-10-10 15:29:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:34,681 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-10-10 15:29:34,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-10 15:29:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-10-10 15:29:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-10 15:29:34,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:34,683 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:34,684 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:34,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:34,684 INFO L82 PathProgramCache]: Analyzing trace with hash 815754281, now seen corresponding path program 20 times [2018-10-10 15:29:34,685 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 0 proven. 2780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:37,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:37,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-10 15:29:37,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-10 15:29:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-10 15:29:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2121, Unknown=0, NotChecked=0, Total=2256 [2018-10-10 15:29:37,992 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 48 states. [2018-10-10 15:29:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:46,022 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-10-10 15:29:46,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-10 15:29:46,023 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 304 [2018-10-10 15:29:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:46,026 INFO L225 Difference]: With dead ends: 331 [2018-10-10 15:29:46,026 INFO L226 Difference]: Without dead ends: 331 [2018-10-10 15:29:46,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=797, Invalid=11859, Unknown=0, NotChecked=0, Total=12656 [2018-10-10 15:29:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-10 15:29:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 319. [2018-10-10 15:29:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-10 15:29:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-10-10 15:29:46,033 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 304 [2018-10-10 15:29:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:46,033 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-10-10 15:29:46,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-10 15:29:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-10-10 15:29:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-10 15:29:46,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:46,036 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:46,036 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:46,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1809123741, now seen corresponding path program 21 times [2018-10-10 15:29:46,037 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3066 backedges. 0 proven. 3066 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:48,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:48,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-10 15:29:48,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-10 15:29:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-10 15:29:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2018-10-10 15:29:48,110 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 50 states. [2018-10-10 15:29:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:29:56,846 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-10-10 15:29:56,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-10 15:29:56,850 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 318 [2018-10-10 15:29:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:29:56,851 INFO L225 Difference]: With dead ends: 345 [2018-10-10 15:29:56,852 INFO L226 Difference]: Without dead ends: 345 [2018-10-10 15:29:56,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=834, Invalid=12972, Unknown=0, NotChecked=0, Total=13806 [2018-10-10 15:29:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2018-10-10 15:29:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 333. [2018-10-10 15:29:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-10-10 15:29:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2018-10-10 15:29:56,858 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 318 [2018-10-10 15:29:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:29:56,858 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2018-10-10 15:29:56,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-10 15:29:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2018-10-10 15:29:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-10 15:29:56,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:29:56,860 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:29:56,861 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:29:56,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:29:56,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1377825775, now seen corresponding path program 22 times [2018-10-10 15:29:56,862 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:29:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:29:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 3366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:29:59,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:29:59,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-10 15:29:59,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-10 15:29:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-10 15:29:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2018-10-10 15:29:59,894 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 52 states. [2018-10-10 15:30:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:09,513 INFO L93 Difference]: Finished difference Result 359 states and 359 transitions. [2018-10-10 15:30:09,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-10 15:30:09,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 332 [2018-10-10 15:30:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:09,518 INFO L225 Difference]: With dead ends: 359 [2018-10-10 15:30:09,518 INFO L226 Difference]: Without dead ends: 359 [2018-10-10 15:30:09,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=871, Invalid=14135, Unknown=0, NotChecked=0, Total=15006 [2018-10-10 15:30:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-10-10 15:30:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 347. [2018-10-10 15:30:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-10 15:30:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-10-10 15:30:09,527 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 332 [2018-10-10 15:30:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:09,527 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-10-10 15:30:09,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-10 15:30:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-10-10 15:30:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-10 15:30:09,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:09,529 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:30:09,530 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:09,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:09,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1860940677, now seen corresponding path program 23 times [2018-10-10 15:30:09,531 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3680 backedges. 0 proven. 3680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:13,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:13,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-10 15:30:13,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-10 15:30:13,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-10 15:30:13,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2018-10-10 15:30:13,002 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 54 states. [2018-10-10 15:30:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:23,274 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-10-10 15:30:23,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-10 15:30:23,274 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 346 [2018-10-10 15:30:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:23,277 INFO L225 Difference]: With dead ends: 373 [2018-10-10 15:30:23,277 INFO L226 Difference]: Without dead ends: 373 [2018-10-10 15:30:23,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=908, Invalid=15348, Unknown=0, NotChecked=0, Total=16256 [2018-10-10 15:30:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-10-10 15:30:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 361. [2018-10-10 15:30:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-10-10 15:30:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2018-10-10 15:30:23,283 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 346 [2018-10-10 15:30:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:23,284 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2018-10-10 15:30:23,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-10 15:30:23,284 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2018-10-10 15:30:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-10 15:30:23,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:23,286 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:30:23,286 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:23,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -629981191, now seen corresponding path program 24 times [2018-10-10 15:30:23,287 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4008 backedges. 0 proven. 4008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:27,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:27,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-10 15:30:27,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-10 15:30:27,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-10 15:30:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2921, Unknown=0, NotChecked=0, Total=3080 [2018-10-10 15:30:27,084 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand 56 states. [2018-10-10 15:30:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:37,972 INFO L93 Difference]: Finished difference Result 387 states and 387 transitions. [2018-10-10 15:30:37,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-10 15:30:37,972 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 360 [2018-10-10 15:30:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:37,974 INFO L225 Difference]: With dead ends: 387 [2018-10-10 15:30:37,974 INFO L226 Difference]: Without dead ends: 387 [2018-10-10 15:30:37,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=945, Invalid=16611, Unknown=0, NotChecked=0, Total=17556 [2018-10-10 15:30:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-10 15:30:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 375. [2018-10-10 15:30:37,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-10-10 15:30:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-10-10 15:30:37,980 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 360 [2018-10-10 15:30:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:37,981 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-10-10 15:30:37,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-10 15:30:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-10-10 15:30:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-10 15:30:37,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:37,983 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:30:37,984 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:37,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:37,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1019088531, now seen corresponding path program 25 times [2018-10-10 15:30:37,985 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4350 backedges. 0 proven. 4350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:40,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:40,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-10 15:30:40,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-10 15:30:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-10 15:30:40,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3141, Unknown=0, NotChecked=0, Total=3306 [2018-10-10 15:30:40,967 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 58 states. [2018-10-10 15:30:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:30:52,802 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-10-10 15:30:52,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-10 15:30:52,802 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 374 [2018-10-10 15:30:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:30:52,805 INFO L225 Difference]: With dead ends: 401 [2018-10-10 15:30:52,805 INFO L226 Difference]: Without dead ends: 401 [2018-10-10 15:30:52,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3133 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=982, Invalid=17924, Unknown=0, NotChecked=0, Total=18906 [2018-10-10 15:30:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-10-10 15:30:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 389. [2018-10-10 15:30:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-10-10 15:30:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 389 transitions. [2018-10-10 15:30:52,811 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 389 transitions. Word has length 374 [2018-10-10 15:30:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:30:52,811 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 389 transitions. [2018-10-10 15:30:52,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-10 15:30:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 389 transitions. [2018-10-10 15:30:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-10-10 15:30:52,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:30:52,814 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:30:52,814 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:30:52,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:30:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1754069023, now seen corresponding path program 26 times [2018-10-10 15:30:52,815 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:30:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:30:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4706 backedges. 0 proven. 4706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:30:57,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:30:57,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-10 15:30:57,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-10 15:30:57,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-10 15:30:57,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2018-10-10 15:30:57,726 INFO L87 Difference]: Start difference. First operand 389 states and 389 transitions. Second operand 60 states. [2018-10-10 15:31:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:10,279 INFO L93 Difference]: Finished difference Result 415 states and 415 transitions. [2018-10-10 15:31:10,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-10 15:31:10,279 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 388 [2018-10-10 15:31:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:10,282 INFO L225 Difference]: With dead ends: 415 [2018-10-10 15:31:10,282 INFO L226 Difference]: Without dead ends: 415 [2018-10-10 15:31:10,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3375 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1019, Invalid=19287, Unknown=0, NotChecked=0, Total=20306 [2018-10-10 15:31:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-10-10 15:31:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 403. [2018-10-10 15:31:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-10-10 15:31:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-10-10 15:31:10,288 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 388 [2018-10-10 15:31:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:10,288 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-10-10 15:31:10,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-10 15:31:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-10-10 15:31:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-10-10 15:31:10,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:10,291 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:31:10,291 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:10,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:10,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1416741717, now seen corresponding path program 27 times [2018-10-10 15:31:10,292 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:14,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:14,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-10 15:31:14,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-10 15:31:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-10 15:31:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3605, Unknown=0, NotChecked=0, Total=3782 [2018-10-10 15:31:14,093 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 62 states. [2018-10-10 15:31:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:27,742 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-10-10 15:31:27,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-10 15:31:27,742 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 402 [2018-10-10 15:31:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:27,745 INFO L225 Difference]: With dead ends: 429 [2018-10-10 15:31:27,745 INFO L226 Difference]: Without dead ends: 429 [2018-10-10 15:31:27,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1056, Invalid=20700, Unknown=0, NotChecked=0, Total=21756 [2018-10-10 15:31:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2018-10-10 15:31:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 417. [2018-10-10 15:31:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2018-10-10 15:31:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 417 transitions. [2018-10-10 15:31:27,751 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 417 transitions. Word has length 402 [2018-10-10 15:31:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:27,751 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 417 transitions. [2018-10-10 15:31:27,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-10 15:31:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 417 transitions. [2018-10-10 15:31:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2018-10-10 15:31:27,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:27,754 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:31:27,754 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:27,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2063164361, now seen corresponding path program 28 times [2018-10-10 15:31:27,756 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:31,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:31,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-10 15:31:31,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-10 15:31:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-10 15:31:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3849, Unknown=0, NotChecked=0, Total=4032 [2018-10-10 15:31:31,119 INFO L87 Difference]: Start difference. First operand 417 states and 417 transitions. Second operand 64 states. [2018-10-10 15:31:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:31:45,564 INFO L93 Difference]: Finished difference Result 443 states and 443 transitions. [2018-10-10 15:31:45,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-10 15:31:45,565 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 416 [2018-10-10 15:31:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:31:45,566 INFO L225 Difference]: With dead ends: 443 [2018-10-10 15:31:45,566 INFO L226 Difference]: Without dead ends: 443 [2018-10-10 15:31:45,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3886 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1093, Invalid=22163, Unknown=0, NotChecked=0, Total=23256 [2018-10-10 15:31:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2018-10-10 15:31:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 431. [2018-10-10 15:31:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-10-10 15:31:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-10-10 15:31:45,573 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 416 [2018-10-10 15:31:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:31:45,573 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-10-10 15:31:45,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-10 15:31:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-10-10 15:31:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-10-10 15:31:45,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:31:45,576 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:31:45,576 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:31:45,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:31:45,577 INFO L82 PathProgramCache]: Analyzing trace with hash 51718461, now seen corresponding path program 29 times [2018-10-10 15:31:45,577 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:31:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:31:47,682 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-10 15:31:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5858 backedges. 0 proven. 5858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:31:50,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:31:50,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-10 15:31:50,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-10 15:31:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-10 15:31:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4101, Unknown=0, NotChecked=0, Total=4290 [2018-10-10 15:31:50,227 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 66 states. [2018-10-10 15:32:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:05,361 INFO L93 Difference]: Finished difference Result 457 states and 457 transitions. [2018-10-10 15:32:05,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-10 15:32:05,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 430 [2018-10-10 15:32:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:05,364 INFO L225 Difference]: With dead ends: 457 [2018-10-10 15:32:05,364 INFO L226 Difference]: Without dead ends: 457 [2018-10-10 15:32:05,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4155 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1130, Invalid=23676, Unknown=0, NotChecked=0, Total=24806 [2018-10-10 15:32:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2018-10-10 15:32:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 445. [2018-10-10 15:32:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-10-10 15:32:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 445 transitions. [2018-10-10 15:32:05,370 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 445 transitions. Word has length 430 [2018-10-10 15:32:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:05,371 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 445 transitions. [2018-10-10 15:32:05,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-10 15:32:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 445 transitions. [2018-10-10 15:32:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-10-10 15:32:05,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:05,374 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:32:05,374 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:05,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1344295857, now seen corresponding path program 30 times [2018-10-10 15:32:05,375 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 0 proven. 6270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:09,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:09,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-10 15:32:09,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-10 15:32:09,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-10 15:32:09,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2018-10-10 15:32:09,389 INFO L87 Difference]: Start difference. First operand 445 states and 445 transitions. Second operand 68 states. [2018-10-10 15:32:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:25,543 INFO L93 Difference]: Finished difference Result 471 states and 471 transitions. [2018-10-10 15:32:25,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-10 15:32:25,544 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 444 [2018-10-10 15:32:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:25,546 INFO L225 Difference]: With dead ends: 471 [2018-10-10 15:32:25,547 INFO L226 Difference]: Without dead ends: 471 [2018-10-10 15:32:25,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4433 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1167, Invalid=25239, Unknown=0, NotChecked=0, Total=26406 [2018-10-10 15:32:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-10-10 15:32:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 459. [2018-10-10 15:32:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2018-10-10 15:32:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 459 transitions. [2018-10-10 15:32:25,554 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 459 transitions. Word has length 444 [2018-10-10 15:32:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:25,554 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 459 transitions. [2018-10-10 15:32:25,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-10 15:32:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 459 transitions. [2018-10-10 15:32:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-10-10 15:32:25,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:25,575 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:32:25,575 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:25,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash 616964901, now seen corresponding path program 31 times [2018-10-10 15:32:25,576 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6696 backedges. 0 proven. 6696 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:30,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:30,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-10 15:32:30,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-10 15:32:30,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-10 15:32:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4629, Unknown=0, NotChecked=0, Total=4830 [2018-10-10 15:32:30,381 INFO L87 Difference]: Start difference. First operand 459 states and 459 transitions. Second operand 70 states. [2018-10-10 15:32:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:32:47,511 INFO L93 Difference]: Finished difference Result 485 states and 485 transitions. [2018-10-10 15:32:47,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-10 15:32:47,511 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 458 [2018-10-10 15:32:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:32:47,513 INFO L225 Difference]: With dead ends: 485 [2018-10-10 15:32:47,513 INFO L226 Difference]: Without dead ends: 485 [2018-10-10 15:32:47,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4720 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1204, Invalid=26852, Unknown=0, NotChecked=0, Total=28056 [2018-10-10 15:32:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2018-10-10 15:32:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 473. [2018-10-10 15:32:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2018-10-10 15:32:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 473 transitions. [2018-10-10 15:32:47,519 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 473 transitions. Word has length 458 [2018-10-10 15:32:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:32:47,520 INFO L481 AbstractCegarLoop]: Abstraction has 473 states and 473 transitions. [2018-10-10 15:32:47,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-10 15:32:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 473 transitions. [2018-10-10 15:32:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-10-10 15:32:47,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:32:47,522 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:32:47,522 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:32:47,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:32:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1761486951, now seen corresponding path program 32 times [2018-10-10 15:32:47,523 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:32:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:32:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7136 backedges. 0 proven. 7136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:32:51,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:32:51,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-10 15:32:51,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-10 15:32:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-10 15:32:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2018-10-10 15:32:51,826 INFO L87 Difference]: Start difference. First operand 473 states and 473 transitions. Second operand 72 states. [2018-10-10 15:33:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:10,469 INFO L93 Difference]: Finished difference Result 499 states and 499 transitions. [2018-10-10 15:33:10,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-10 15:33:10,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 472 [2018-10-10 15:33:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:10,471 INFO L225 Difference]: With dead ends: 499 [2018-10-10 15:33:10,471 INFO L226 Difference]: Without dead ends: 499 [2018-10-10 15:33:10,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5016 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1241, Invalid=28515, Unknown=0, NotChecked=0, Total=29756 [2018-10-10 15:33:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-10-10 15:33:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 487. [2018-10-10 15:33:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2018-10-10 15:33:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 487 transitions. [2018-10-10 15:33:10,478 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 487 transitions. Word has length 472 [2018-10-10 15:33:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:10,478 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 487 transitions. [2018-10-10 15:33:10,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-10 15:33:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 487 transitions. [2018-10-10 15:33:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-10-10 15:33:10,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:10,482 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:10,482 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:10,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash 69120269, now seen corresponding path program 33 times [2018-10-10 15:33:10,483 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7590 backedges. 0 proven. 7590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:14,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:14,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-10 15:33:14,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-10 15:33:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-10 15:33:14,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5189, Unknown=0, NotChecked=0, Total=5402 [2018-10-10 15:33:14,867 INFO L87 Difference]: Start difference. First operand 487 states and 487 transitions. Second operand 74 states. [2018-10-10 15:33:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:34,176 INFO L93 Difference]: Finished difference Result 513 states and 513 transitions. [2018-10-10 15:33:34,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-10 15:33:34,176 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 486 [2018-10-10 15:33:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:34,179 INFO L225 Difference]: With dead ends: 513 [2018-10-10 15:33:34,179 INFO L226 Difference]: Without dead ends: 513 [2018-10-10 15:33:34,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5321 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1278, Invalid=30228, Unknown=0, NotChecked=0, Total=31506 [2018-10-10 15:33:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-10-10 15:33:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 501. [2018-10-10 15:33:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2018-10-10 15:33:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 501 transitions. [2018-10-10 15:33:34,186 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 501 transitions. Word has length 486 [2018-10-10 15:33:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:34,186 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 501 transitions. [2018-10-10 15:33:34,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-10 15:33:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 501 transitions. [2018-10-10 15:33:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-10-10 15:33:34,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:34,190 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:34,190 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:34,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash 79163265, now seen corresponding path program 34 times [2018-10-10 15:33:34,191 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:33:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8058 backedges. 0 proven. 8058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:33:38,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:33:38,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-10 15:33:38,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-10 15:33:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-10 15:33:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2018-10-10 15:33:38,996 INFO L87 Difference]: Start difference. First operand 501 states and 501 transitions. Second operand 76 states. [2018-10-10 15:33:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:33:59,572 INFO L93 Difference]: Finished difference Result 527 states and 527 transitions. [2018-10-10 15:33:59,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-10 15:33:59,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 500 [2018-10-10 15:33:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:33:59,575 INFO L225 Difference]: With dead ends: 527 [2018-10-10 15:33:59,575 INFO L226 Difference]: Without dead ends: 527 [2018-10-10 15:33:59,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5635 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1315, Invalid=31991, Unknown=0, NotChecked=0, Total=33306 [2018-10-10 15:33:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-10-10 15:33:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 515. [2018-10-10 15:33:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-10-10 15:33:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2018-10-10 15:33:59,582 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 500 [2018-10-10 15:33:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:33:59,582 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2018-10-10 15:33:59,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-10 15:33:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2018-10-10 15:33:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2018-10-10 15:33:59,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:33:59,586 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:33:59,586 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:33:59,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:33:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1622725365, now seen corresponding path program 35 times [2018-10-10 15:33:59,587 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:33:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8540 backedges. 0 proven. 8540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:04,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:04,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-10 15:34:04,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-10 15:34:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-10 15:34:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=5781, Unknown=0, NotChecked=0, Total=6006 [2018-10-10 15:34:04,648 INFO L87 Difference]: Start difference. First operand 515 states and 515 transitions. Second operand 78 states. [2018-10-10 15:34:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:26,236 INFO L93 Difference]: Finished difference Result 541 states and 541 transitions. [2018-10-10 15:34:26,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-10 15:34:26,237 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 514 [2018-10-10 15:34:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:26,239 INFO L225 Difference]: With dead ends: 541 [2018-10-10 15:34:26,239 INFO L226 Difference]: Without dead ends: 541 [2018-10-10 15:34:26,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5958 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1352, Invalid=33804, Unknown=0, NotChecked=0, Total=35156 [2018-10-10 15:34:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2018-10-10 15:34:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 529. [2018-10-10 15:34:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2018-10-10 15:34:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 529 transitions. [2018-10-10 15:34:26,246 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 529 transitions. Word has length 514 [2018-10-10 15:34:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:26,247 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 529 transitions. [2018-10-10 15:34:26,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-10 15:34:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 529 transitions. [2018-10-10 15:34:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-10-10 15:34:26,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:26,250 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:34:26,251 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:26,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash 56400745, now seen corresponding path program 36 times [2018-10-10 15:34:26,252 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9036 backedges. 0 proven. 9036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:31,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:31,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-10 15:34:31,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-10 15:34:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-10 15:34:31,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=6089, Unknown=0, NotChecked=0, Total=6320 [2018-10-10 15:34:31,520 INFO L87 Difference]: Start difference. First operand 529 states and 529 transitions. Second operand 80 states. [2018-10-10 15:34:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:34:54,281 INFO L93 Difference]: Finished difference Result 555 states and 555 transitions. [2018-10-10 15:34:54,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-10 15:34:54,281 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 528 [2018-10-10 15:34:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:34:54,283 INFO L225 Difference]: With dead ends: 555 [2018-10-10 15:34:54,283 INFO L226 Difference]: Without dead ends: 555 [2018-10-10 15:34:54,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6290 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1389, Invalid=35667, Unknown=0, NotChecked=0, Total=37056 [2018-10-10 15:34:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-10-10 15:34:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2018-10-10 15:34:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-10-10 15:34:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 543 transitions. [2018-10-10 15:34:54,290 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 543 transitions. Word has length 528 [2018-10-10 15:34:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:34:54,291 INFO L481 AbstractCegarLoop]: Abstraction has 543 states and 543 transitions. [2018-10-10 15:34:54,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-10 15:34:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 543 transitions. [2018-10-10 15:34:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-10-10 15:34:54,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:34:54,295 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:34:54,295 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:34:54,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:34:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash -282162979, now seen corresponding path program 37 times [2018-10-10 15:34:54,297 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:34:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:34:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9546 backedges. 0 proven. 9546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:34:59,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:34:59,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-10-10 15:34:59,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-10 15:34:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-10 15:34:59,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=6405, Unknown=0, NotChecked=0, Total=6642 [2018-10-10 15:34:59,730 INFO L87 Difference]: Start difference. First operand 543 states and 543 transitions. Second operand 82 states. [2018-10-10 15:35:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:35:23,658 INFO L93 Difference]: Finished difference Result 569 states and 569 transitions. [2018-10-10 15:35:23,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-10 15:35:23,659 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 542 [2018-10-10 15:35:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:35:23,661 INFO L225 Difference]: With dead ends: 569 [2018-10-10 15:35:23,661 INFO L226 Difference]: Without dead ends: 569 [2018-10-10 15:35:23,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6631 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1426, Invalid=37580, Unknown=0, NotChecked=0, Total=39006 [2018-10-10 15:35:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2018-10-10 15:35:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 557. [2018-10-10 15:35:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2018-10-10 15:35:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 557 transitions. [2018-10-10 15:35:23,666 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 557 transitions. Word has length 542 [2018-10-10 15:35:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:35:23,666 INFO L481 AbstractCegarLoop]: Abstraction has 557 states and 557 transitions. [2018-10-10 15:35:23,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-10 15:35:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 557 transitions. [2018-10-10 15:35:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-10-10 15:35:23,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:35:23,669 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:35:23,669 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:35:23,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:35:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 839506769, now seen corresponding path program 38 times [2018-10-10 15:35:23,670 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:35:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:35:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10070 backedges. 0 proven. 10070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:35:29,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:35:29,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-10 15:35:29,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-10 15:35:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-10 15:35:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6729, Unknown=0, NotChecked=0, Total=6972 [2018-10-10 15:35:29,601 INFO L87 Difference]: Start difference. First operand 557 states and 557 transitions. Second operand 84 states. [2018-10-10 15:35:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:35:55,093 INFO L93 Difference]: Finished difference Result 583 states and 583 transitions. [2018-10-10 15:35:55,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-10 15:35:55,094 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 556 [2018-10-10 15:35:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:35:55,096 INFO L225 Difference]: With dead ends: 583 [2018-10-10 15:35:55,096 INFO L226 Difference]: Without dead ends: 583 [2018-10-10 15:35:55,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6981 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1463, Invalid=39543, Unknown=0, NotChecked=0, Total=41006 [2018-10-10 15:35:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2018-10-10 15:35:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 571. [2018-10-10 15:35:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2018-10-10 15:35:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 571 transitions. [2018-10-10 15:35:55,103 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 571 transitions. Word has length 556 [2018-10-10 15:35:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:35:55,103 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 571 transitions. [2018-10-10 15:35:55,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-10 15:35:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 571 transitions. [2018-10-10 15:35:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2018-10-10 15:35:55,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:35:55,108 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:35:55,108 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:35:55,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:35:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash -652619067, now seen corresponding path program 39 times [2018-10-10 15:35:55,109 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:35:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:36:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10608 backedges. 0 proven. 10608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:36:01,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:36:01,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-10 15:36:01,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-10 15:36:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-10 15:36:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=7061, Unknown=0, NotChecked=0, Total=7310 [2018-10-10 15:36:01,568 INFO L87 Difference]: Start difference. First operand 571 states and 571 transitions. Second operand 86 states. [2018-10-10 15:36:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 15:36:28,046 INFO L93 Difference]: Finished difference Result 597 states and 597 transitions. [2018-10-10 15:36:28,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-10 15:36:28,046 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 570 [2018-10-10 15:36:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 15:36:28,048 INFO L225 Difference]: With dead ends: 597 [2018-10-10 15:36:28,048 INFO L226 Difference]: Without dead ends: 597 [2018-10-10 15:36:28,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7340 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=1500, Invalid=41556, Unknown=0, NotChecked=0, Total=43056 [2018-10-10 15:36:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2018-10-10 15:36:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 585. [2018-10-10 15:36:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2018-10-10 15:36:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 585 transitions. [2018-10-10 15:36:28,054 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 585 transitions. Word has length 570 [2018-10-10 15:36:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 15:36:28,055 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 585 transitions. [2018-10-10 15:36:28,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-10 15:36:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 585 transitions. [2018-10-10 15:36:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2018-10-10 15:36:28,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 15:36:28,059 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 15:36:28,059 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-10 15:36:28,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 15:36:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash -455495879, now seen corresponding path program 40 times [2018-10-10 15:36:28,060 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-10 15:36:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 15:36:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11160 backedges. 0 proven. 11160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 15:36:34,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-10 15:36:34,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-10-10 15:36:34,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-10 15:36:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-10 15:36:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=7401, Unknown=0, NotChecked=0, Total=7656 [2018-10-10 15:36:34,436 INFO L87 Difference]: Start difference. First operand 585 states and 585 transitions. Second operand 88 states.