java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 19:16:52,983 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 19:16:52,985 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 19:16:53,002 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 19:16:53,003 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 19:16:53,004 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 19:16:53,006 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 19:16:53,008 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 19:16:53,010 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 19:16:53,013 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 19:16:53,014 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 19:16:53,016 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 19:16:53,017 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 19:16:53,018 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 19:16:53,022 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 19:16:53,023 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 19:16:53,024 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 19:16:53,026 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 19:16:53,035 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 19:16:53,040 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 19:16:53,044 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 19:16:53,045 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 19:16:53,047 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 19:16:53,048 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 19:16:53,048 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 19:16:53,051 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 19:16:53,053 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 19:16:53,053 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 19:16:53,056 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 19:16:53,059 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 19:16:53,059 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 19:16:53,061 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 19:16:53,061 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 19:16:53,061 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 19:16:53,063 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 19:16:53,064 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 19:16:53,064 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-26 19:16:53,086 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 19:16:53,087 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 19:16:53,087 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 19:16:53,088 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 19:16:53,088 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 19:16:53,088 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 19:16:53,089 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 19:16:53,089 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 19:16:53,089 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 19:16:53,089 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 19:16:53,089 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 19:16:53,090 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 19:16:53,090 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 19:16:53,090 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 19:16:53,090 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 19:16:53,090 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 19:16:53,091 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 19:16:53,091 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 19:16:53,091 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 19:16:53,091 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:16:53,091 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 19:16:53,092 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 19:16:53,092 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 19:16:53,092 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 19:16:53,092 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 19:16:53,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 19:16:53,092 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 19:16:53,093 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 19:16:53,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 19:16:53,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 19:16:53,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 19:16:53,175 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 19:16:53,176 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 19:16:53,177 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51_false-unreach-call.c [2018-10-26 19:16:53,241 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1c5557c9f/395c5d4968264cdc8fc34d4193c94f90/FLAG22c26c959 [2018-10-26 19:16:54,069 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 19:16:54,069 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label51_false-unreach-call.c [2018-10-26 19:16:54,108 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1c5557c9f/395c5d4968264cdc8fc34d4193c94f90/FLAG22c26c959 [2018-10-26 19:16:54,126 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1c5557c9f/395c5d4968264cdc8fc34d4193c94f90 [2018-10-26 19:16:54,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 19:16:54,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 19:16:54,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 19:16:54,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 19:16:54,146 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 19:16:54,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:16:54" (1/1) ... [2018-10-26 19:16:54,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4621111d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:54, skipping insertion in model container [2018-10-26 19:16:54,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:16:54" (1/1) ... [2018-10-26 19:16:54,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 19:16:54,362 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 19:16:55,882 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:16:55,889 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 19:16:56,686 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 19:16:56,733 INFO L193 MainTranslator]: Completed translation [2018-10-26 19:16:56,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56 WrapperNode [2018-10-26 19:16:56,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 19:16:56,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 19:16:56,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 19:16:56,736 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 19:16:56,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:56,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 19:16:57,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 19:16:57,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 19:16:57,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 19:16:57,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... [2018-10-26 19:16:57,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 19:16:57,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 19:16:57,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 19:16:57,989 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 19:16:57,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 19:16:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 19:16:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 19:16:58,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 19:17:11,177 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 19:17:11,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:11 BoogieIcfgContainer [2018-10-26 19:17:11,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 19:17:11,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 19:17:11,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 19:17:11,182 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 19:17:11,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:16:54" (1/3) ... [2018-10-26 19:17:11,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6c5dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:11, skipping insertion in model container [2018-10-26 19:17:11,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:16:56" (2/3) ... [2018-10-26 19:17:11,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6c5dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:11, skipping insertion in model container [2018-10-26 19:17:11,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:11" (3/3) ... [2018-10-26 19:17:11,186 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label51_false-unreach-call.c [2018-10-26 19:17:11,196 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 19:17:11,209 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 19:17:11,227 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 19:17:11,278 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 19:17:11,279 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 19:17:11,279 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 19:17:11,279 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 19:17:11,280 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 19:17:11,280 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 19:17:11,280 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 19:17:11,280 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 19:17:11,280 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 19:17:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-26 19:17:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 19:17:11,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:11,334 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, 1] [2018-10-26 19:17:11,336 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:11,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:11,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1473047758, now seen corresponding path program 1 times [2018-10-26 19:17:11,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:11,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:11,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:11,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:11,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:17:11,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:17:11,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:17:11,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:17:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:17:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:17:11,830 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-26 19:17:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:17:29,263 INFO L93 Difference]: Finished difference Result 3870 states and 7276 transitions. [2018-10-26 19:17:29,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:17:29,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-10-26 19:17:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:17:29,311 INFO L225 Difference]: With dead ends: 3870 [2018-10-26 19:17:29,312 INFO L226 Difference]: Without dead ends: 2764 [2018-10-26 19:17:29,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:17:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2018-10-26 19:17:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2736. [2018-10-26 19:17:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2018-10-26 19:17:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4487 transitions. [2018-10-26 19:17:29,488 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4487 transitions. Word has length 25 [2018-10-26 19:17:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:17:29,488 INFO L481 AbstractCegarLoop]: Abstraction has 2736 states and 4487 transitions. [2018-10-26 19:17:29,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:17:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4487 transitions. [2018-10-26 19:17:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-26 19:17:29,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:29,500 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:17:29,500 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:29,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:29,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1869468109, now seen corresponding path program 1 times [2018-10-26 19:17:29,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:29,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:29,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:17:30,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:17:30,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:17:30,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:17:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:17:30,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:17:30,337 INFO L87 Difference]: Start difference. First operand 2736 states and 4487 transitions. Second operand 5 states. [2018-10-26 19:17:30,605 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-26 19:17:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:17:48,510 INFO L93 Difference]: Finished difference Result 9428 states and 14930 transitions. [2018-10-26 19:17:48,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:17:48,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-10-26 19:17:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:17:48,544 INFO L225 Difference]: With dead ends: 9428 [2018-10-26 19:17:48,545 INFO L226 Difference]: Without dead ends: 6694 [2018-10-26 19:17:48,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-26 19:17:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2018-10-26 19:17:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6693. [2018-10-26 19:17:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6693 states. [2018-10-26 19:17:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6693 states to 6693 states and 9417 transitions. [2018-10-26 19:17:48,682 INFO L78 Accepts]: Start accepts. Automaton has 6693 states and 9417 transitions. Word has length 131 [2018-10-26 19:17:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:17:48,683 INFO L481 AbstractCegarLoop]: Abstraction has 6693 states and 9417 transitions. [2018-10-26 19:17:48,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:17:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6693 states and 9417 transitions. [2018-10-26 19:17:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-26 19:17:48,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:17:48,689 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:17:48,690 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:17:48,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:17:48,690 INFO L82 PathProgramCache]: Analyzing trace with hash -63284076, now seen corresponding path program 1 times [2018-10-26 19:17:48,690 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:17:48,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:17:48,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:48,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:17:48,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:17:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:17:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:17:49,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:17:49,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:17:49,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:17:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:17:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:17:49,115 INFO L87 Difference]: Start difference. First operand 6693 states and 9417 transitions. Second operand 4 states. [2018-10-26 19:18:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:01,517 INFO L93 Difference]: Finished difference Result 16580 states and 24281 transitions. [2018-10-26 19:18:01,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:18:01,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2018-10-26 19:18:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:01,563 INFO L225 Difference]: With dead ends: 16580 [2018-10-26 19:18:01,564 INFO L226 Difference]: Without dead ends: 10677 [2018-10-26 19:18:01,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2018-10-26 19:18:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 9863. [2018-10-26 19:18:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9863 states. [2018-10-26 19:18:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 13541 transitions. [2018-10-26 19:18:01,752 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 13541 transitions. Word has length 201 [2018-10-26 19:18:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:01,753 INFO L481 AbstractCegarLoop]: Abstraction has 9863 states and 13541 transitions. [2018-10-26 19:18:01,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:18:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 13541 transitions. [2018-10-26 19:18:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-26 19:18:01,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:01,759 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 19:18:01,759 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:01,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:01,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1923206406, now seen corresponding path program 1 times [2018-10-26 19:18:01,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:01,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:01,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:01,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:01,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:18:02,099 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:18:02,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:18:02,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:18:02,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:18:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:18:02,100 INFO L87 Difference]: Start difference. First operand 9863 states and 13541 transitions. Second operand 5 states. [2018-10-26 19:18:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:25,315 INFO L93 Difference]: Finished difference Result 43673 states and 61710 transitions. [2018-10-26 19:18:25,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:18:25,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2018-10-26 19:18:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:25,405 INFO L225 Difference]: With dead ends: 43673 [2018-10-26 19:18:25,405 INFO L226 Difference]: Without dead ends: 34600 [2018-10-26 19:18:25,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:18:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34600 states. [2018-10-26 19:18:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34600 to 34418. [2018-10-26 19:18:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34418 states. [2018-10-26 19:18:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34418 states to 34418 states and 45210 transitions. [2018-10-26 19:18:25,905 INFO L78 Accepts]: Start accepts. Automaton has 34418 states and 45210 transitions. Word has length 208 [2018-10-26 19:18:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:25,906 INFO L481 AbstractCegarLoop]: Abstraction has 34418 states and 45210 transitions. [2018-10-26 19:18:25,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 19:18:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34418 states and 45210 transitions. [2018-10-26 19:18:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-26 19:18:25,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:25,914 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2018-10-26 19:18:25,915 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:25,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:25,915 INFO L82 PathProgramCache]: Analyzing trace with hash 23292814, now seen corresponding path program 1 times [2018-10-26 19:18:25,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:25,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:25,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:25,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:25,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 19:18:26,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:18:26,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:18:26,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:18:26,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:18:26,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:18:26,138 INFO L87 Difference]: Start difference. First operand 34418 states and 45210 transitions. Second operand 3 states. [2018-10-26 19:18:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:34,211 INFO L93 Difference]: Finished difference Result 69603 states and 91391 transitions. [2018-10-26 19:18:34,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:18:34,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 266 [2018-10-26 19:18:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:34,287 INFO L225 Difference]: With dead ends: 69603 [2018-10-26 19:18:34,287 INFO L226 Difference]: Without dead ends: 35975 [2018-10-26 19:18:34,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:18:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35975 states. [2018-10-26 19:18:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35975 to 35971. [2018-10-26 19:18:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35971 states. [2018-10-26 19:18:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35971 states to 35971 states and 43276 transitions. [2018-10-26 19:18:34,800 INFO L78 Accepts]: Start accepts. Automaton has 35971 states and 43276 transitions. Word has length 266 [2018-10-26 19:18:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:34,800 INFO L481 AbstractCegarLoop]: Abstraction has 35971 states and 43276 transitions. [2018-10-26 19:18:34,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:18:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 35971 states and 43276 transitions. [2018-10-26 19:18:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-26 19:18:34,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:34,816 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:18:34,816 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:34,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash -838332517, now seen corresponding path program 1 times [2018-10-26 19:18:34,817 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:34,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:34,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:34,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:34,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-10-26 19:18:35,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:18:35,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:18:35,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:35,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:18:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 19:18:35,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:18:35,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 19:18:35,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:18:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:18:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:35,505 INFO L87 Difference]: Start difference. First operand 35971 states and 43276 transitions. Second operand 4 states. [2018-10-26 19:18:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:18:47,942 INFO L93 Difference]: Finished difference Result 133457 states and 161522 transitions. [2018-10-26 19:18:47,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:18:47,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2018-10-26 19:18:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:18:48,105 INFO L225 Difference]: With dead ends: 133457 [2018-10-26 19:18:48,105 INFO L226 Difference]: Without dead ends: 98276 [2018-10-26 19:18:48,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98276 states. [2018-10-26 19:18:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98276 to 65910. [2018-10-26 19:18:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65910 states. [2018-10-26 19:18:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65910 states to 65910 states and 76253 transitions. [2018-10-26 19:18:49,315 INFO L78 Accepts]: Start accepts. Automaton has 65910 states and 76253 transitions. Word has length 334 [2018-10-26 19:18:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:18:49,316 INFO L481 AbstractCegarLoop]: Abstraction has 65910 states and 76253 transitions. [2018-10-26 19:18:49,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:18:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 65910 states and 76253 transitions. [2018-10-26 19:18:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-26 19:18:49,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:18:49,332 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 19:18:49,332 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:18:49,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:18:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1483410897, now seen corresponding path program 1 times [2018-10-26 19:18:49,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:18:49,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:18:49,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:49,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:49,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:18:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-10-26 19:18:49,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:18:49,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:18:49,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:18:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:18:49,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:18:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 19:18:49,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:18:50,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 19:18:50,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:18:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:18:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:18:50,001 INFO L87 Difference]: Start difference. First operand 65910 states and 76253 transitions. Second operand 4 states. [2018-10-26 19:19:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:02,206 INFO L93 Difference]: Finished difference Result 218554 states and 252582 transitions. [2018-10-26 19:19:02,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:19:02,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2018-10-26 19:19:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:02,392 INFO L225 Difference]: With dead ends: 218554 [2018-10-26 19:19:02,392 INFO L226 Difference]: Without dead ends: 153434 [2018-10-26 19:19:02,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:19:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153434 states. [2018-10-26 19:19:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153434 to 114762. [2018-10-26 19:19:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114762 states. [2018-10-26 19:19:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114762 states to 114762 states and 130187 transitions. [2018-10-26 19:19:03,972 INFO L78 Accepts]: Start accepts. Automaton has 114762 states and 130187 transitions. Word has length 340 [2018-10-26 19:19:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:03,972 INFO L481 AbstractCegarLoop]: Abstraction has 114762 states and 130187 transitions. [2018-10-26 19:19:03,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:19:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 114762 states and 130187 transitions. [2018-10-26 19:19:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-26 19:19:03,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:03,997 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-26 19:19:03,997 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:03,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash -278948975, now seen corresponding path program 1 times [2018-10-26 19:19:03,998 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:03,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:03,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:03,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:03,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-10-26 19:19:05,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:19:05,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:19:05,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:19:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:19:05,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:19:05,140 INFO L87 Difference]: Start difference. First operand 114762 states and 130187 transitions. Second operand 3 states. [2018-10-26 19:19:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:11,797 INFO L93 Difference]: Finished difference Result 308314 states and 350199 transitions. [2018-10-26 19:19:11,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:19:11,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 360 [2018-10-26 19:19:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:12,008 INFO L225 Difference]: With dead ends: 308314 [2018-10-26 19:19:12,009 INFO L226 Difference]: Without dead ends: 188016 [2018-10-26 19:19:12,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:19:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188016 states. [2018-10-26 19:19:14,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188016 to 177761. [2018-10-26 19:19:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177761 states. [2018-10-26 19:19:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177761 states to 177761 states and 195742 transitions. [2018-10-26 19:19:15,009 INFO L78 Accepts]: Start accepts. Automaton has 177761 states and 195742 transitions. Word has length 360 [2018-10-26 19:19:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:15,009 INFO L481 AbstractCegarLoop]: Abstraction has 177761 states and 195742 transitions. [2018-10-26 19:19:15,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:19:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 177761 states and 195742 transitions. [2018-10-26 19:19:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-10-26 19:19:15,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:15,022 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:19:15,022 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:15,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash -161572742, now seen corresponding path program 1 times [2018-10-26 19:19:15,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:15,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:15,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:15,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:15,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-26 19:19:15,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:19:15,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 19:19:15,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:19:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:19:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:19:15,383 INFO L87 Difference]: Start difference. First operand 177761 states and 195742 transitions. Second operand 4 states. [2018-10-26 19:19:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:25,244 INFO L93 Difference]: Finished difference Result 366553 states and 403044 transitions. [2018-10-26 19:19:25,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:19:25,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 383 [2018-10-26 19:19:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:25,433 INFO L225 Difference]: With dead ends: 366553 [2018-10-26 19:19:25,433 INFO L226 Difference]: Without dead ends: 169036 [2018-10-26 19:19:25,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:19:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169036 states. [2018-10-26 19:19:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169036 to 158791. [2018-10-26 19:19:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158791 states. [2018-10-26 19:19:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158791 states to 158791 states and 173588 transitions. [2018-10-26 19:19:28,539 INFO L78 Accepts]: Start accepts. Automaton has 158791 states and 173588 transitions. Word has length 383 [2018-10-26 19:19:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:28,539 INFO L481 AbstractCegarLoop]: Abstraction has 158791 states and 173588 transitions. [2018-10-26 19:19:28,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:19:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 158791 states and 173588 transitions. [2018-10-26 19:19:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-10-26 19:19:28,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:28,553 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:19:28,553 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:28,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1025877272, now seen corresponding path program 1 times [2018-10-26 19:19:28,553 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:28,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:28,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:28,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:28,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:29,186 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-26 19:19:29,409 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-26 19:19:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 385 proven. 5 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-26 19:19:29,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:19:29,574 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:19:29,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:29,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:19:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-10-26 19:19:31,112 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:19:31,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-26 19:19:31,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 19:19:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 19:19:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 19:19:31,116 INFO L87 Difference]: Start difference. First operand 158791 states and 173588 transitions. Second operand 8 states. [2018-10-26 19:19:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:19:51,515 INFO L93 Difference]: Finished difference Result 320852 states and 351206 transitions. [2018-10-26 19:19:51,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 19:19:51,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 444 [2018-10-26 19:19:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:19:51,713 INFO L225 Difference]: With dead ends: 320852 [2018-10-26 19:19:51,714 INFO L226 Difference]: Without dead ends: 159677 [2018-10-26 19:19:51,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 450 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-26 19:19:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159677 states. [2018-10-26 19:19:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159677 to 147709. [2018-10-26 19:19:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147709 states. [2018-10-26 19:19:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147709 states to 147709 states and 156525 transitions. [2018-10-26 19:19:54,239 INFO L78 Accepts]: Start accepts. Automaton has 147709 states and 156525 transitions. Word has length 444 [2018-10-26 19:19:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:19:54,239 INFO L481 AbstractCegarLoop]: Abstraction has 147709 states and 156525 transitions. [2018-10-26 19:19:54,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 19:19:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 147709 states and 156525 transitions. [2018-10-26 19:19:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2018-10-26 19:19:54,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:19:54,249 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:19:54,249 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:19:54,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:19:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1602407670, now seen corresponding path program 1 times [2018-10-26 19:19:54,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:19:54,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:19:54,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:54,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:19:54,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:19:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:19:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-26 19:19:54,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:19:54,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:19:54,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:19:54,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:19:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:19:54,921 INFO L87 Difference]: Start difference. First operand 147709 states and 156525 transitions. Second operand 4 states. [2018-10-26 19:20:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:20:09,565 INFO L93 Difference]: Finished difference Result 297799 states and 315490 transitions. [2018-10-26 19:20:09,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:20:09,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2018-10-26 19:20:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:20:09,735 INFO L225 Difference]: With dead ends: 297799 [2018-10-26 19:20:09,736 INFO L226 Difference]: Without dead ends: 147717 [2018-10-26 19:20:09,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:20:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147717 states. [2018-10-26 19:20:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147717 to 144544. [2018-10-26 19:20:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144544 states. [2018-10-26 19:20:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144544 states to 144544 states and 150981 transitions. [2018-10-26 19:20:11,496 INFO L78 Accepts]: Start accepts. Automaton has 144544 states and 150981 transitions. Word has length 505 [2018-10-26 19:20:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:20:11,497 INFO L481 AbstractCegarLoop]: Abstraction has 144544 states and 150981 transitions. [2018-10-26 19:20:11,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:20:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 144544 states and 150981 transitions. [2018-10-26 19:20:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2018-10-26 19:20:11,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:20:11,508 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2018-10-26 19:20:11,508 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:20:11,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:20:11,508 INFO L82 PathProgramCache]: Analyzing trace with hash 825951640, now seen corresponding path program 1 times [2018-10-26 19:20:11,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:20:11,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:20:11,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:11,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:20:11,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:20:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2018-10-26 19:20:12,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:20:12,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 19:20:12,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 19:20:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 19:20:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:20:12,519 INFO L87 Difference]: Start difference. First operand 144544 states and 150981 transitions. Second operand 3 states. [2018-10-26 19:20:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:20:16,376 INFO L93 Difference]: Finished difference Result 286710 states and 299409 transitions. [2018-10-26 19:20:16,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 19:20:16,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 515 [2018-10-26 19:20:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:20:16,533 INFO L225 Difference]: With dead ends: 286710 [2018-10-26 19:20:16,534 INFO L226 Difference]: Without dead ends: 142954 [2018-10-26 19:20:16,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 19:20:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142954 states. [2018-10-26 19:20:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142954 to 142954. [2018-10-26 19:20:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142954 states. [2018-10-26 19:20:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142954 states to 142954 states and 149205 transitions. [2018-10-26 19:20:18,564 INFO L78 Accepts]: Start accepts. Automaton has 142954 states and 149205 transitions. Word has length 515 [2018-10-26 19:20:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:20:18,565 INFO L481 AbstractCegarLoop]: Abstraction has 142954 states and 149205 transitions. [2018-10-26 19:20:18,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 19:20:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 142954 states and 149205 transitions. [2018-10-26 19:20:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-10-26 19:20:18,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:20:18,576 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:20:18,576 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:20:18,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:20:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1462207020, now seen corresponding path program 1 times [2018-10-26 19:20:18,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:20:18,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:20:18,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:18,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:20:18,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:20:19,098 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 8 [2018-10-26 19:20:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-26 19:20:19,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 19:20:19,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 19:20:19,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 19:20:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 19:20:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:20:19,288 INFO L87 Difference]: Start difference. First operand 142954 states and 149205 transitions. Second operand 4 states. [2018-10-26 19:20:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 19:20:29,810 INFO L93 Difference]: Finished difference Result 315916 states and 330138 transitions. [2018-10-26 19:20:29,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 19:20:29,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 528 [2018-10-26 19:20:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 19:20:30,009 INFO L225 Difference]: With dead ends: 315916 [2018-10-26 19:20:30,009 INFO L226 Difference]: Without dead ends: 173752 [2018-10-26 19:20:30,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 19:20:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173752 states. [2018-10-26 19:20:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173752 to 168969. [2018-10-26 19:20:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168969 states. [2018-10-26 19:20:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168969 states to 168969 states and 175905 transitions. [2018-10-26 19:20:32,342 INFO L78 Accepts]: Start accepts. Automaton has 168969 states and 175905 transitions. Word has length 528 [2018-10-26 19:20:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 19:20:32,344 INFO L481 AbstractCegarLoop]: Abstraction has 168969 states and 175905 transitions. [2018-10-26 19:20:32,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 19:20:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 168969 states and 175905 transitions. [2018-10-26 19:20:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2018-10-26 19:20:32,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 19:20:32,377 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 19:20:32,377 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 19:20:32,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 19:20:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2134973995, now seen corresponding path program 1 times [2018-10-26 19:20:32,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 19:20:32,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 19:20:32,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:32,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:20:32,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 19:20:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:20:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 872 proven. 16 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-10-26 19:20:34,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 19:20:34,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 19:20:34,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 19:20:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 19:20:34,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 19:20:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 872 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-26 19:20:34,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 19:20:34,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-26 19:20:34,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 19:20:34,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 19:20:34,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 19:20:34,871 INFO L87 Difference]: Start difference. First operand 168969 states and 175905 transitions. Second operand 5 states. Received shutdown request... [2018-10-26 19:20:39,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 19:20:39,917 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 19:20:39,923 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 19:20:39,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:20:39 BoogieIcfgContainer [2018-10-26 19:20:39,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 19:20:39,925 INFO L168 Benchmark]: Toolchain (without parser) took 225785.59 ms. Allocated memory was 1.5 GB in the beginning and 4.4 GB in the end (delta: 2.8 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-26 19:20:39,926 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 19:20:39,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2593.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:39,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 830.02 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:39,928 INFO L168 Benchmark]: Boogie Preprocessor took 422.67 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 69.4 MB). Peak memory consumption was 69.4 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:39,929 INFO L168 Benchmark]: RCFGBuilder took 13189.71 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 259.0 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -7.4 MB). Peak memory consumption was 607.5 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:39,930 INFO L168 Benchmark]: TraceAbstraction took 208744.87 ms. Allocated memory was 2.6 GB in the beginning and 4.4 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.9 GB in the end (delta: -773.5 MB). Peak memory consumption was 988.6 MB. Max. memory is 7.1 GB. [2018-10-26 19:20:39,935 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2593.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 830.02 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 814.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 422.67 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 69.4 MB). Peak memory consumption was 69.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13189.71 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 259.0 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -7.4 MB). Peak memory consumption was 607.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208744.87 ms. Allocated memory was 2.6 GB in the beginning and 4.4 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.9 GB in the end (delta: -773.5 MB). Peak memory consumption was 988.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 84). Cancelled while BasicCegarLoop was constructing difference of abstraction (168969states) and FLOYD_HOARE automaton (currently 5 states, 5 states before enhancement),while ReachableStatesComputation was computing reachable states (15730 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 208.6s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 177.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 11014 SDtfs, 31840 SDslu, 3282 SDs, 0 SdLazy, 67126 SolverSat, 15905 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 144.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1959 GetRequests, 1912 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=177761occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 18.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 112491 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 6906 NumberOfCodeBlocks, 6906 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6888 ConstructedInterpolants, 0 QuantifiedInterpolants, 7411913 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2473 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 18 InterpolantComputations, 14 PerfectInterpolantSequences, 8329/8358 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown