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_label46_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:29:14,175 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:29:14,178 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:29:14,190 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:29:14,190 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:29:14,191 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:29:14,193 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:29:14,194 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:29:14,196 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:29:14,197 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:29:14,198 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:29:14,198 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:29:14,199 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:29:14,200 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:29:14,201 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:29:14,202 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:29:14,203 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:29:14,205 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:29:14,207 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:29:14,209 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:29:14,210 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:29:14,211 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:29:14,214 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:29:14,216 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:29:14,216 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:29:14,217 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:29:14,218 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:29:14,221 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:29:14,222 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:29:14,227 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:29:14,227 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:29:14,228 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-26 21:29:14,232 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 21:29:14,263 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:29:14,264 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:29:14,265 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:29:14,265 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:29:14,265 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:29:14,266 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:29:14,267 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:29:14,267 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:29:14,268 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:29:14,268 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:29:14,268 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:29:14,268 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:29:14,268 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:29:14,269 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:29:14,269 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:29:14,269 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:29:14,269 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:29:14,270 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:29:14,270 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:29:14,270 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:29:14,270 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:29:14,270 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:29:14,272 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:29:14,272 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:29:14,272 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:29:14,273 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:29:14,273 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:29:14,273 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 21:29:14,317 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:29:14,330 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:29:14,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:29:14,334 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:29:14,335 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:29:14,335 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label46_true-unreach-call.c [2018-10-26 21:29:14,397 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/14b134457/9e30c4755cfb4f7b9e85339370393934/FLAG576483441 [2018-10-26 21:29:15,260 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:29:15,262 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label46_true-unreach-call.c [2018-10-26 21:29:15,297 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/14b134457/9e30c4755cfb4f7b9e85339370393934/FLAG576483441 [2018-10-26 21:29:15,313 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/14b134457/9e30c4755cfb4f7b9e85339370393934 [2018-10-26 21:29:15,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:29:15,324 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:29:15,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:29:15,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:29:15,329 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:29:15,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:29:15" (1/1) ... [2018-10-26 21:29:15,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da13f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:15, skipping insertion in model container [2018-10-26 21:29:15,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:29:15" (1/1) ... [2018-10-26 21:29:15,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:29:15,519 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:29:16,870 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:29:16,875 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:29:17,554 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:29:17,587 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:29:17,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17 WrapperNode [2018-10-26 21:29:17,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:29:17,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:29:17,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:29:17,589 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:29:17,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:17,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:18,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:29:18,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:29:18,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:29:18,476 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:29:18,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:18,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:18,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:18,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:18,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:18,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:19,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (1/1) ... [2018-10-26 21:29:19,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:29:19,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:29:19,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:29:19,071 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:29:19,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (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 21:29:19,141 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-26 21:29:19,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:29:19,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:29:33,624 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:29:33,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:29:33 BoogieIcfgContainer [2018-10-26 21:29:33,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:29:33,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:29:33,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:29:33,630 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:29:33,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:29:15" (1/3) ... [2018-10-26 21:29:33,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452c0b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:29:33, skipping insertion in model container [2018-10-26 21:29:33,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:29:17" (2/3) ... [2018-10-26 21:29:33,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452c0b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:29:33, skipping insertion in model container [2018-10-26 21:29:33,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:29:33" (3/3) ... [2018-10-26 21:29:33,634 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label46_true-unreach-call.c [2018-10-26 21:29:33,644 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:29:33,654 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:29:33,669 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:29:33,713 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:29:33,714 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:29:33,714 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:29:33,714 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:29:33,714 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:29:33,714 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:29:33,714 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:29:33,715 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:29:33,715 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:29:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-26 21:29:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 21:29:33,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:33,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:29:33,776 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:33,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash -757100326, now seen corresponding path program 1 times [2018-10-26 21:29:33,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:33,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:33,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:33,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:33,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:34,357 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 21:29:34,364 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:34,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:29:34,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:29:34,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:29:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:34,405 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-26 21:29:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:29:51,029 INFO L93 Difference]: Finished difference Result 3863 states and 7261 transitions. [2018-10-26 21:29:51,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:29:51,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2018-10-26 21:29:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:29:51,080 INFO L225 Difference]: With dead ends: 3863 [2018-10-26 21:29:51,081 INFO L226 Difference]: Without dead ends: 2757 [2018-10-26 21:29:51,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-10-26 21:29:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2736. [2018-10-26 21:29:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2018-10-26 21:29:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4486 transitions. [2018-10-26 21:29:51,266 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4486 transitions. Word has length 67 [2018-10-26 21:29:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:29:51,267 INFO L481 AbstractCegarLoop]: Abstraction has 2736 states and 4486 transitions. [2018-10-26 21:29:51,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:29:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4486 transitions. [2018-10-26 21:29:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-26 21:29:51,282 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:29:51,282 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, 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 21:29:51,283 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:29:51,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:29:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash 316082808, now seen corresponding path program 1 times [2018-10-26 21:29:51,283 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:29:51,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:29:51,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:51,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:29:51,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:29:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:29:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:29:51,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:29:51,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:29:51,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:29:51,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:29:51,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:29:51,593 INFO L87 Difference]: Start difference. First operand 2736 states and 4486 transitions. Second operand 4 states. [2018-10-26 21:30:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:09,797 INFO L93 Difference]: Finished difference Result 10269 states and 17048 transitions. [2018-10-26 21:30:09,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:30:09,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2018-10-26 21:30:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:09,840 INFO L225 Difference]: With dead ends: 10269 [2018-10-26 21:30:09,841 INFO L226 Difference]: Without dead ends: 7535 [2018-10-26 21:30:09,848 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 21:30:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2018-10-26 21:30:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 7527. [2018-10-26 21:30:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7527 states. [2018-10-26 21:30:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11327 transitions. [2018-10-26 21:30:10,008 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11327 transitions. Word has length 154 [2018-10-26 21:30:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:30:10,009 INFO L481 AbstractCegarLoop]: Abstraction has 7527 states and 11327 transitions. [2018-10-26 21:30:10,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:30:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11327 transitions. [2018-10-26 21:30:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-26 21:30:10,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:30:10,020 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, 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] [2018-10-26 21:30:10,020 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:30:10,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:30:10,022 INFO L82 PathProgramCache]: Analyzing trace with hash -34421127, now seen corresponding path program 1 times [2018-10-26 21:30:10,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:30:10,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:30:10,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:10,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:10,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:10,500 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 21:30:10,719 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-26 21:30:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-26 21:30:11,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:30:11,034 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 21:30:11,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:11,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:30:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-26 21:30:11,319 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:30:11,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2018-10-26 21:30:11,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:30:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:30:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:30:11,323 INFO L87 Difference]: Start difference. First operand 7527 states and 11327 transitions. Second operand 6 states. [2018-10-26 21:30:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:28,277 INFO L93 Difference]: Finished difference Result 31771 states and 47113 transitions. [2018-10-26 21:30:28,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:30:28,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-10-26 21:30:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:28,382 INFO L225 Difference]: With dead ends: 31771 [2018-10-26 21:30:28,382 INFO L226 Difference]: Without dead ends: 24246 [2018-10-26 21:30:28,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 21:30:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2018-10-26 21:30:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16988. [2018-10-26 21:30:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16988 states. [2018-10-26 21:30:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16988 states to 16988 states and 22868 transitions. [2018-10-26 21:30:28,812 INFO L78 Accepts]: Start accepts. Automaton has 16988 states and 22868 transitions. Word has length 164 [2018-10-26 21:30:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:30:28,813 INFO L481 AbstractCegarLoop]: Abstraction has 16988 states and 22868 transitions. [2018-10-26 21:30:28,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:30:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 16988 states and 22868 transitions. [2018-10-26 21:30:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-26 21:30:28,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:30:28,825 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:30:28,825 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:30:28,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:30:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2015316394, now seen corresponding path program 1 times [2018-10-26 21:30:28,826 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:30:28,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:30:28,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:28,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:28,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-26 21:30:29,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:30:29,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:30:29,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:30:29,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:30:29,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:30:29,382 INFO L87 Difference]: Start difference. First operand 16988 states and 22868 transitions. Second operand 5 states. [2018-10-26 21:30:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:30:48,868 INFO L93 Difference]: Finished difference Result 76838 states and 105623 transitions. [2018-10-26 21:30:48,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:30:48,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2018-10-26 21:30:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:30:49,008 INFO L225 Difference]: With dead ends: 76838 [2018-10-26 21:30:49,009 INFO L226 Difference]: Without dead ends: 60640 [2018-10-26 21:30:49,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:30:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60640 states. [2018-10-26 21:30:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60640 to 60479. [2018-10-26 21:30:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60479 states. [2018-10-26 21:30:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60479 states to 60479 states and 78589 transitions. [2018-10-26 21:30:50,550 INFO L78 Accepts]: Start accepts. Automaton has 60479 states and 78589 transitions. Word has length 310 [2018-10-26 21:30:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:30:50,551 INFO L481 AbstractCegarLoop]: Abstraction has 60479 states and 78589 transitions. [2018-10-26 21:30:50,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:30:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 60479 states and 78589 transitions. [2018-10-26 21:30:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-26 21:30:50,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:30:50,567 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, 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, 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, 1, 1] [2018-10-26 21:30:50,567 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:30:50,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:30:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash 982787291, now seen corresponding path program 1 times [2018-10-26 21:30:50,569 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:30:50,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:30:50,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:50,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:50,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:30:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:50,907 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-26 21:30:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 272 proven. 4 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-26 21:30:50,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:30:50,993 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 21:30:51,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:30:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:30:51,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:30:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-26 21:30:51,244 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:30:51,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-26 21:30:51,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:30:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:30:51,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:30:51,246 INFO L87 Difference]: Start difference. First operand 60479 states and 78589 transitions. Second operand 4 states. [2018-10-26 21:31:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:31:03,509 INFO L93 Difference]: Finished difference Result 188831 states and 245712 transitions. [2018-10-26 21:31:03,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:31:03,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 311 [2018-10-26 21:31:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:31:03,754 INFO L225 Difference]: With dead ends: 188831 [2018-10-26 21:31:03,755 INFO L226 Difference]: Without dead ends: 129142 [2018-10-26 21:31:03,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 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 21:31:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129142 states. [2018-10-26 21:31:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129142 to 91995. [2018-10-26 21:31:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91995 states. [2018-10-26 21:31:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91995 states to 91995 states and 115044 transitions. [2018-10-26 21:31:05,117 INFO L78 Accepts]: Start accepts. Automaton has 91995 states and 115044 transitions. Word has length 311 [2018-10-26 21:31:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:31:05,118 INFO L481 AbstractCegarLoop]: Abstraction has 91995 states and 115044 transitions. [2018-10-26 21:31:05,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:31:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 91995 states and 115044 transitions. [2018-10-26 21:31:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-10-26 21:31:05,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:31:05,141 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, 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, 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] [2018-10-26 21:31:05,141 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:31:05,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:31:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash 786676273, now seen corresponding path program 1 times [2018-10-26 21:31:05,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:31:05,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:31:05,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:05,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:31:05,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:31:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-26 21:31:05,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:31:05,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:31:05,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:31:05,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:31:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:31:05,644 INFO L87 Difference]: Start difference. First operand 91995 states and 115044 transitions. Second operand 4 states. [2018-10-26 21:31:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:31:17,140 INFO L93 Difference]: Finished difference Result 246226 states and 309396 transitions. [2018-10-26 21:31:17,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:31:17,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 365 [2018-10-26 21:31:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:31:17,326 INFO L225 Difference]: With dead ends: 246226 [2018-10-26 21:31:17,326 INFO L226 Difference]: Without dead ends: 155021 [2018-10-26 21:31:17,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:31:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155021 states. [2018-10-26 21:31:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155021 to 154227. [2018-10-26 21:31:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154227 states. [2018-10-26 21:31:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154227 states to 154227 states and 181771 transitions. [2018-10-26 21:31:18,842 INFO L78 Accepts]: Start accepts. Automaton has 154227 states and 181771 transitions. Word has length 365 [2018-10-26 21:31:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:31:18,843 INFO L481 AbstractCegarLoop]: Abstraction has 154227 states and 181771 transitions. [2018-10-26 21:31:18,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:31:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 154227 states and 181771 transitions. [2018-10-26 21:31:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-10-26 21:31:18,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:31:18,861 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:31:18,861 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:31:18,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:31:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1624357672, now seen corresponding path program 1 times [2018-10-26 21:31:18,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:31:18,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:31:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:18,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:31:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:31:20,321 WARN L179 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-26 21:31:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-26 21:31:20,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:31:20,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:31:20,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:31:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:31:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:31:20,517 INFO L87 Difference]: Start difference. First operand 154227 states and 181771 transitions. Second operand 4 states. [2018-10-26 21:31:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:31:32,784 INFO L93 Difference]: Finished difference Result 347893 states and 410964 transitions. [2018-10-26 21:31:32,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:31:32,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2018-10-26 21:31:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:31:32,998 INFO L225 Difference]: With dead ends: 347893 [2018-10-26 21:31:32,999 INFO L226 Difference]: Without dead ends: 194456 [2018-10-26 21:31:33,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:31:33,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194456 states. [2018-10-26 21:31:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194456 to 192835. [2018-10-26 21:31:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192835 states. [2018-10-26 21:31:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192835 states to 192835 states and 218397 transitions. [2018-10-26 21:31:35,959 INFO L78 Accepts]: Start accepts. Automaton has 192835 states and 218397 transitions. Word has length 368 [2018-10-26 21:31:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:31:35,960 INFO L481 AbstractCegarLoop]: Abstraction has 192835 states and 218397 transitions. [2018-10-26 21:31:35,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:31:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 192835 states and 218397 transitions. [2018-10-26 21:31:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-10-26 21:31:35,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:31:35,971 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, 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, 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, 1] [2018-10-26 21:31:35,971 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:31:35,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:31:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -486199203, now seen corresponding path program 1 times [2018-10-26 21:31:35,972 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:31:35,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:31:35,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:35,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:31:35,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:31:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:31:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-10-26 21:31:36,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:31:36,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:31:36,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:31:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:31:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:31:36,376 INFO L87 Difference]: Start difference. First operand 192835 states and 218397 transitions. Second operand 6 states. [2018-10-26 21:31:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:31:58,577 INFO L93 Difference]: Finished difference Result 444159 states and 502602 transitions. [2018-10-26 21:31:58,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 21:31:58,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 400 [2018-10-26 21:31:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:31:58,925 INFO L225 Difference]: With dead ends: 444159 [2018-10-26 21:31:58,925 INFO L226 Difference]: Without dead ends: 252114 [2018-10-26 21:31:59,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:31:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252114 states. [2018-10-26 21:32:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252114 to 248075. [2018-10-26 21:32:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248075 states. [2018-10-26 21:32:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248075 states to 248075 states and 278529 transitions. [2018-10-26 21:32:02,445 INFO L78 Accepts]: Start accepts. Automaton has 248075 states and 278529 transitions. Word has length 400 [2018-10-26 21:32:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:02,445 INFO L481 AbstractCegarLoop]: Abstraction has 248075 states and 278529 transitions. [2018-10-26 21:32:02,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:32:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 248075 states and 278529 transitions. [2018-10-26 21:32:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2018-10-26 21:32:02,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:02,454 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, 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, 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, 1, 1, 1, 1, 1, 1, 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 21:32:02,455 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:02,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1213374830, now seen corresponding path program 1 times [2018-10-26 21:32:02,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:02,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:02,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:02,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:02,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-10-26 21:32:02,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:32:02,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:32:02,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:32:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:32:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:32:02,690 INFO L87 Difference]: Start difference. First operand 248075 states and 278529 transitions. Second operand 3 states. [2018-10-26 21:32:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:32:10,987 INFO L93 Difference]: Finished difference Result 494547 states and 554798 transitions. [2018-10-26 21:32:10,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:32:10,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2018-10-26 21:32:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:32:11,330 INFO L225 Difference]: With dead ends: 494547 [2018-10-26 21:32:11,331 INFO L226 Difference]: Without dead ends: 247262 [2018-10-26 21:32:11,470 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 21:32:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247262 states. [2018-10-26 21:32:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247262 to 247254. [2018-10-26 21:32:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247254 states. [2018-10-26 21:32:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247254 states to 247254 states and 267774 transitions. [2018-10-26 21:32:21,526 INFO L78 Accepts]: Start accepts. Automaton has 247254 states and 267774 transitions. Word has length 429 [2018-10-26 21:32:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:21,527 INFO L481 AbstractCegarLoop]: Abstraction has 247254 states and 267774 transitions. [2018-10-26 21:32:21,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:32:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 247254 states and 267774 transitions. [2018-10-26 21:32:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-10-26 21:32:21,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:21,538 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:32:21,538 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:21,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:21,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1008175477, now seen corresponding path program 1 times [2018-10-26 21:32:21,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:21,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:21,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:21,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:21,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-26 21:32:21,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:32:21,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 21:32:21,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 21:32:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 21:32:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 21:32:21,900 INFO L87 Difference]: Start difference. First operand 247254 states and 267774 transitions. Second operand 4 states. [2018-10-26 21:32:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:32:37,837 INFO L93 Difference]: Finished difference Result 538668 states and 583723 transitions. [2018-10-26 21:32:37,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 21:32:37,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 432 [2018-10-26 21:32:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:32:38,217 INFO L225 Difference]: With dead ends: 538668 [2018-10-26 21:32:38,217 INFO L226 Difference]: Without dead ends: 292204 [2018-10-26 21:32:38,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:32:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292204 states. [2018-10-26 21:32:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292204 to 277181. [2018-10-26 21:32:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277181 states. [2018-10-26 21:32:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277181 states to 277181 states and 297689 transitions. [2018-10-26 21:32:42,133 INFO L78 Accepts]: Start accepts. Automaton has 277181 states and 297689 transitions. Word has length 432 [2018-10-26 21:32:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:32:42,135 INFO L481 AbstractCegarLoop]: Abstraction has 277181 states and 297689 transitions. [2018-10-26 21:32:42,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 21:32:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 277181 states and 297689 transitions. [2018-10-26 21:32:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2018-10-26 21:32:42,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:32:42,148 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:32:42,148 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:32:42,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:32:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash 463802685, now seen corresponding path program 1 times [2018-10-26 21:32:42,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:32:42,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:32:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:42,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:32:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 455 proven. 110 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-10-26 21:32:43,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:32:43,621 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 21:32:43,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:32:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:32:43,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:32:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2018-10-26 21:32:43,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:32:43,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-26 21:32:43,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 21:32:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 21:32:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:32:43,888 INFO L87 Difference]: Start difference. First operand 277181 states and 297689 transitions. Second operand 8 states. Received shutdown request... [2018-10-26 21:32:57,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:32:57,543 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 21:32:57,548 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 21:32:57,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:32:57 BoogieIcfgContainer [2018-10-26 21:32:57,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:32:57,549 INFO L168 Benchmark]: Toolchain (without parser) took 222225.26 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-26 21:32:57,550 INFO L168 Benchmark]: CDTParser took 0.17 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 21:32:57,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2263.12 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 21:32:57,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 886.64 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 826.8 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 73.1 MB. Max. memory is 7.1 GB. [2018-10-26 21:32:57,552 INFO L168 Benchmark]: Boogie Preprocessor took 594.68 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: 75.1 MB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. [2018-10-26 21:32:57,553 INFO L168 Benchmark]: RCFGBuilder took 14554.59 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.9 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 32.3 MB). Peak memory consumption was 596.3 MB. Max. memory is 7.1 GB. [2018-10-26 21:32:57,554 INFO L168 Benchmark]: TraceAbstraction took 203921.15 ms. Allocated memory was 2.6 GB in the beginning and 4.8 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -652.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-26 21:32:57,559 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 2263.12 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 886.64 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 826.8 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 73.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 594.68 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: 75.1 MB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14554.59 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 234.9 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 32.3 MB). Peak memory consumption was 596.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203921.15 ms. Allocated memory was 2.6 GB in the beginning and 4.8 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -652.3 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 210]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 210). Cancelled while BasicCegarLoop was constructing difference of abstraction (277181states) and FLOYD_HOARE automaton (currently 12 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (117163 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 203.8s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 170.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7980 SDtfs, 35996 SDslu, 3271 SDs, 0 SdLazy, 61482 SolverSat, 16496 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 135.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1005 GetRequests, 964 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=277181occurred in iteration=10, 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: 25.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 66080 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 4419 NumberOfCodeBlocks, 4419 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 4405 ConstructedInterpolants, 0 QuantifiedInterpolants, 4905700 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1290 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 14 InterpolantComputations, 11 PerfectInterpolantSequences, 5409/5527 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown