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/Problem16_label05_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:22:02,177 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:22:02,179 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:22:02,192 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:22:02,192 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:22:02,193 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:22:02,195 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:22:02,197 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:22:02,199 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:22:02,200 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:22:02,208 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:22:02,209 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:22:02,210 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:22:02,214 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:22:02,215 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:22:02,216 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:22:02,219 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:22:02,222 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:22:02,227 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:22:02,228 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:22:02,229 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:22:02,234 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:22:02,238 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:22:02,239 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:22:02,241 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:22:02,242 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:22:02,245 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:22:02,245 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:22:02,246 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:22:02,249 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:22:02,249 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:22:02,250 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 14:22:02,251 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 14:22:02,251 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 14:22:02,252 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 14:22:02,253 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 14:22:02,253 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 [2018-10-24 14:22:02,281 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:22:02,281 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:22:02,282 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:22:02,282 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:22:02,283 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:22:02,283 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:22:02,284 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:22:02,284 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:22:02,284 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:22:02,284 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:22:02,284 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:22:02,285 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:22:02,286 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:22:02,286 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:22:02,286 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:22:02,286 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:22:02,287 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:22:02,287 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:22:02,287 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:22:02,287 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:22:02,287 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:22:02,288 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:22:02,289 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:22:02,289 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:22:02,289 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:22:02,290 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:22:02,290 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:22:02,290 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:22:02,336 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:22:02,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:22:02,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:22:02,355 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:22:02,355 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:22:02,356 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label05_false-unreach-call.c [2018-10-24 14:22:02,418 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/353313718/63e5c20c4d0e4eb8a65ee15f953b785a/FLAG2f2d3ef98 [2018-10-24 14:22:03,104 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:22:03,107 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label05_false-unreach-call.c [2018-10-24 14:22:03,130 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/353313718/63e5c20c4d0e4eb8a65ee15f953b785a/FLAG2f2d3ef98 [2018-10-24 14:22:03,149 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/353313718/63e5c20c4d0e4eb8a65ee15f953b785a [2018-10-24 14:22:03,162 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:22:03,164 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:22:03,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:22:03,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:22:03,169 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:22:03,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:22:03" (1/1) ... [2018-10-24 14:22:03,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769766bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:03, skipping insertion in model container [2018-10-24 14:22:03,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:22:03" (1/1) ... [2018-10-24 14:22:03,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:22:03,286 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:22:04,034 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:22:04,038 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:22:04,278 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:22:04,302 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:22:04,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04 WrapperNode [2018-10-24 14:22:04,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:22:04,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:22:04,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:22:04,305 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:22:04,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:22:04,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:22:04,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:22:04,646 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:22:04,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (1/1) ... [2018-10-24 14:22:04,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:22:04,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:22:04,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:22:04,810 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:22:04,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (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 [2018-10-24 14:22:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:22:04,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:22:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:22:11,847 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:22:11,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:22:11 BoogieIcfgContainer [2018-10-24 14:22:11,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:22:11,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:22:11,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:22:11,853 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:22:11,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:22:03" (1/3) ... [2018-10-24 14:22:11,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178c1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:22:11, skipping insertion in model container [2018-10-24 14:22:11,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:22:04" (2/3) ... [2018-10-24 14:22:11,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178c1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:22:11, skipping insertion in model container [2018-10-24 14:22:11,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:22:11" (3/3) ... [2018-10-24 14:22:11,858 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label05_false-unreach-call.c [2018-10-24 14:22:11,871 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:22:11,880 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:22:11,899 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:22:11,939 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:22:11,940 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:22:11,940 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:22:11,940 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:22:11,940 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:22:11,940 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:22:11,941 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:22:11,941 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:22:11,941 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:22:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-24 14:22:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 14:22:11,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:11,979 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] [2018-10-24 14:22:11,981 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:11,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash 183950178, now seen corresponding path program 1 times [2018-10-24 14:22:11,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:11,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:12,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:12,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:12,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:22:12,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:12,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:22:12,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:12,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:12,401 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-10-24 14:22:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:18,788 INFO L93 Difference]: Finished difference Result 1473 states and 2781 transitions. [2018-10-24 14:22:18,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:18,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-24 14:22:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:18,822 INFO L225 Difference]: With dead ends: 1473 [2018-10-24 14:22:18,822 INFO L226 Difference]: Without dead ends: 1069 [2018-10-24 14:22:18,828 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 [2018-10-24 14:22:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-10-24 14:22:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 724. [2018-10-24 14:22:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-24 14:22:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1277 transitions. [2018-10-24 14:22:18,933 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1277 transitions. Word has length 20 [2018-10-24 14:22:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:18,934 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1277 transitions. [2018-10-24 14:22:18,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:22:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1277 transitions. [2018-10-24 14:22:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 14:22:18,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:18,939 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:22:18,940 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:18,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:18,940 INFO L82 PathProgramCache]: Analyzing trace with hash 832241570, now seen corresponding path program 1 times [2018-10-24 14:22:18,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:18,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:18,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:18,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:22:19,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:19,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:22:19,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:19,212 INFO L87 Difference]: Start difference. First operand 724 states and 1277 transitions. Second operand 4 states. [2018-10-24 14:22:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:24,774 INFO L93 Difference]: Finished difference Result 2766 states and 4980 transitions. [2018-10-24 14:22:24,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:22:24,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2018-10-24 14:22:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:24,788 INFO L225 Difference]: With dead ends: 2766 [2018-10-24 14:22:24,789 INFO L226 Difference]: Without dead ends: 2044 [2018-10-24 14:22:24,792 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 [2018-10-24 14:22:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-10-24 14:22:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-10-24 14:22:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-10-24 14:22:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3249 transitions. [2018-10-24 14:22:24,856 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3249 transitions. Word has length 87 [2018-10-24 14:22:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:24,857 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 3249 transitions. [2018-10-24 14:22:24,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:22:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3249 transitions. [2018-10-24 14:22:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-24 14:22:24,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:24,861 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:22:24,862 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:24,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1850634171, now seen corresponding path program 1 times [2018-10-24 14:22:24,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:24,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:24,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:24,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:24,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:25,377 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2018-10-24 14:22:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:22:25,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:25,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 14:22:25,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:22:25,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:22:25,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:22:25,417 INFO L87 Difference]: Start difference. First operand 2044 states and 3249 transitions. Second operand 6 states. [2018-10-24 14:22:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:33,161 INFO L93 Difference]: Finished difference Result 6728 states and 10478 transitions. [2018-10-24 14:22:33,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:22:33,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-24 14:22:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:33,186 INFO L225 Difference]: With dead ends: 6728 [2018-10-24 14:22:33,187 INFO L226 Difference]: Without dead ends: 4686 [2018-10-24 14:22:33,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:22:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2018-10-24 14:22:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 4686. [2018-10-24 14:22:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4686 states. [2018-10-24 14:22:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 6895 transitions. [2018-10-24 14:22:33,286 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 6895 transitions. Word has length 100 [2018-10-24 14:22:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:33,286 INFO L481 AbstractCegarLoop]: Abstraction has 4686 states and 6895 transitions. [2018-10-24 14:22:33,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:22:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 6895 transitions. [2018-10-24 14:22:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-24 14:22:33,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:33,300 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:33,301 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:33,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash -852110444, now seen corresponding path program 1 times [2018-10-24 14:22:33,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:33,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:33,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:33,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:33,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-24 14:22:33,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:33,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 14:22:33,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:22:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:22:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:22:33,580 INFO L87 Difference]: Start difference. First operand 4686 states and 6895 transitions. Second operand 3 states. [2018-10-24 14:22:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:35,729 INFO L93 Difference]: Finished difference Result 12998 states and 19544 transitions. [2018-10-24 14:22:35,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:22:35,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2018-10-24 14:22:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:35,771 INFO L225 Difference]: With dead ends: 12998 [2018-10-24 14:22:35,771 INFO L226 Difference]: Without dead ends: 8646 [2018-10-24 14:22:35,779 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 [2018-10-24 14:22:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2018-10-24 14:22:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8646. [2018-10-24 14:22:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8646 states. [2018-10-24 14:22:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8646 states to 8646 states and 12001 transitions. [2018-10-24 14:22:35,946 INFO L78 Accepts]: Start accepts. Automaton has 8646 states and 12001 transitions. Word has length 188 [2018-10-24 14:22:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:35,946 INFO L481 AbstractCegarLoop]: Abstraction has 8646 states and 12001 transitions. [2018-10-24 14:22:35,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:22:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8646 states and 12001 transitions. [2018-10-24 14:22:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-24 14:22:35,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:35,960 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:22:35,960 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:35,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash -382813575, now seen corresponding path program 1 times [2018-10-24 14:22:35,961 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:35,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:35,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:35,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:35,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:36,359 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:22:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-24 14:22:36,856 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:36,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:22:36,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 14:22:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 14:22:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:22:36,858 INFO L87 Difference]: Start difference. First operand 8646 states and 12001 transitions. Second operand 7 states. [2018-10-24 14:22:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:43,455 INFO L93 Difference]: Finished difference Result 17367 states and 24077 transitions. [2018-10-24 14:22:43,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:22:43,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 344 [2018-10-24 14:22:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:43,490 INFO L225 Difference]: With dead ends: 17367 [2018-10-24 14:22:43,490 INFO L226 Difference]: Without dead ends: 8723 [2018-10-24 14:22:43,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:22:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8723 states. [2018-10-24 14:22:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8723 to 8644. [2018-10-24 14:22:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8644 states. [2018-10-24 14:22:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 11991 transitions. [2018-10-24 14:22:43,674 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 11991 transitions. Word has length 344 [2018-10-24 14:22:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:43,674 INFO L481 AbstractCegarLoop]: Abstraction has 8644 states and 11991 transitions. [2018-10-24 14:22:43,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 14:22:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 11991 transitions. [2018-10-24 14:22:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-10-24 14:22:43,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:43,686 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:43,687 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:43,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1499308984, now seen corresponding path program 1 times [2018-10-24 14:22:43,687 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:43,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:43,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:43,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-24 14:22:44,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:44,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:22:44,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:22:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:22:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:22:44,009 INFO L87 Difference]: Start difference. First operand 8644 states and 11991 transitions. Second operand 3 states. [2018-10-24 14:22:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:46,198 INFO L93 Difference]: Finished difference Result 17286 states and 23997 transitions. [2018-10-24 14:22:46,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:22:46,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 432 [2018-10-24 14:22:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:46,212 INFO L225 Difference]: With dead ends: 17286 [2018-10-24 14:22:46,212 INFO L226 Difference]: Without dead ends: 6982 [2018-10-24 14:22:46,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:22:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2018-10-24 14:22:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6652. [2018-10-24 14:22:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6652 states. [2018-10-24 14:22:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6652 states to 6652 states and 7477 transitions. [2018-10-24 14:22:46,318 INFO L78 Accepts]: Start accepts. Automaton has 6652 states and 7477 transitions. Word has length 432 [2018-10-24 14:22:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:46,318 INFO L481 AbstractCegarLoop]: Abstraction has 6652 states and 7477 transitions. [2018-10-24 14:22:46,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:22:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6652 states and 7477 transitions. [2018-10-24 14:22:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-10-24 14:22:46,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:46,328 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:46,329 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:46,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash -613698571, now seen corresponding path program 1 times [2018-10-24 14:22:46,329 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:46,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:46,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:46,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:46,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:46,877 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:22:47,272 WARN L179 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-24 14:22:47,685 WARN L179 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-10-24 14:22:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 240 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 14:22:49,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:22:49,001 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 [2018-10-24 14:22:49,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:49,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:22:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-24 14:22:49,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:22:49,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2018-10-24 14:22:49,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:22:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:22:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:22:49,669 INFO L87 Difference]: Start difference. First operand 6652 states and 7477 transitions. Second operand 9 states. [2018-10-24 14:22:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:22:57,055 INFO L93 Difference]: Finished difference Result 16292 states and 18243 transitions. [2018-10-24 14:22:57,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 14:22:57,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 448 [2018-10-24 14:22:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:22:57,076 INFO L225 Difference]: With dead ends: 16292 [2018-10-24 14:22:57,076 INFO L226 Difference]: Without dead ends: 9972 [2018-10-24 14:22:57,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-24 14:22:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9972 states. [2018-10-24 14:22:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9972 to 9292. [2018-10-24 14:22:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9292 states. [2018-10-24 14:22:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 10240 transitions. [2018-10-24 14:22:57,246 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 10240 transitions. Word has length 448 [2018-10-24 14:22:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:22:57,247 INFO L481 AbstractCegarLoop]: Abstraction has 9292 states and 10240 transitions. [2018-10-24 14:22:57,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:22:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 10240 transitions. [2018-10-24 14:22:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2018-10-24 14:22:57,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:22:57,386 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:22:57,386 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:22:57,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:22:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1823474811, now seen corresponding path program 1 times [2018-10-24 14:22:57,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:22:57,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:22:57,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:57,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:22:57,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:22:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:22:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-10-24 14:22:57,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:22:57,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:22:57,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:22:57,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:22:57,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:22:57,963 INFO L87 Difference]: Start difference. First operand 9292 states and 10240 transitions. Second operand 4 states. [2018-10-24 14:23:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:00,916 INFO L93 Difference]: Finished difference Result 20892 states and 23071 transitions. [2018-10-24 14:23:00,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:23:00,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 574 [2018-10-24 14:23:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:00,937 INFO L225 Difference]: With dead ends: 20892 [2018-10-24 14:23:00,937 INFO L226 Difference]: Without dead ends: 11600 [2018-10-24 14:23:00,947 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 [2018-10-24 14:23:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2018-10-24 14:23:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 11270. [2018-10-24 14:23:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2018-10-24 14:23:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 12074 transitions. [2018-10-24 14:23:01,088 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 12074 transitions. Word has length 574 [2018-10-24 14:23:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:01,089 INFO L481 AbstractCegarLoop]: Abstraction has 11270 states and 12074 transitions. [2018-10-24 14:23:01,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:23:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 12074 transitions. [2018-10-24 14:23:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-10-24 14:23:01,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:01,113 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-10-24 14:23:01,113 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:01,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1992105334, now seen corresponding path program 1 times [2018-10-24 14:23:01,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:01,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:01,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:01,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:01,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-24 14:23:02,034 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:23:02,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:23:02,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:23:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:23:02,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:02,036 INFO L87 Difference]: Start difference. First operand 11270 states and 12074 transitions. Second operand 4 states. [2018-10-24 14:23:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:06,581 INFO L93 Difference]: Finished difference Result 25178 states and 27080 transitions. [2018-10-24 14:23:06,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:23:06,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 675 [2018-10-24 14:23:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:06,605 INFO L225 Difference]: With dead ends: 25178 [2018-10-24 14:23:06,606 INFO L226 Difference]: Without dead ends: 14240 [2018-10-24 14:23:06,618 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 [2018-10-24 14:23:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14240 states. [2018-10-24 14:23:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14240 to 13910. [2018-10-24 14:23:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13910 states. [2018-10-24 14:23:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 14764 transitions. [2018-10-24 14:23:06,788 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 14764 transitions. Word has length 675 [2018-10-24 14:23:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:06,789 INFO L481 AbstractCegarLoop]: Abstraction has 13910 states and 14764 transitions. [2018-10-24 14:23:06,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:23:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 14764 transitions. [2018-10-24 14:23:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2018-10-24 14:23:06,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:06,831 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 14:23:06,832 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:06,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:06,832 INFO L82 PathProgramCache]: Analyzing trace with hash 813981583, now seen corresponding path program 1 times [2018-10-24 14:23:06,832 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:06,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:06,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:06,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:06,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:07,507 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 14:23:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 54 proven. 220 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-24 14:23:08,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:23:08,216 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 [2018-10-24 14:23:08,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:08,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:23:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2018-10-24 14:23:08,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:23:08,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-24 14:23:08,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 14:23:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 14:23:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:23:08,871 INFO L87 Difference]: Start difference. First operand 13910 states and 14764 transitions. Second operand 8 states. [2018-10-24 14:23:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:13,480 INFO L93 Difference]: Finished difference Result 27632 states and 29338 transitions. [2018-10-24 14:23:13,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:23:13,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 835 [2018-10-24 14:23:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:13,502 INFO L225 Difference]: With dead ends: 27632 [2018-10-24 14:23:13,502 INFO L226 Difference]: Without dead ends: 14054 [2018-10-24 14:23:13,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 836 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:23:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14054 states. [2018-10-24 14:23:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14054 to 13250. [2018-10-24 14:23:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13250 states. [2018-10-24 14:23:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13250 states to 13250 states and 13941 transitions. [2018-10-24 14:23:13,828 INFO L78 Accepts]: Start accepts. Automaton has 13250 states and 13941 transitions. Word has length 835 [2018-10-24 14:23:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:13,830 INFO L481 AbstractCegarLoop]: Abstraction has 13250 states and 13941 transitions. [2018-10-24 14:23:13,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 14:23:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 13250 states and 13941 transitions. [2018-10-24 14:23:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2018-10-24 14:23:13,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:13,866 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:13,867 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:13,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash -621107017, now seen corresponding path program 1 times [2018-10-24 14:23:13,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:13,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:13,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:13,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:13,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:14,663 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 14:23:14,878 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 14:23:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2541 backedges. 1770 proven. 0 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2018-10-24 14:23:16,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:23:16,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 14:23:16,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:23:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:23:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:23:16,510 INFO L87 Difference]: Start difference. First operand 13250 states and 13941 transitions. Second operand 6 states. [2018-10-24 14:23:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:19,406 INFO L93 Difference]: Finished difference Result 27972 states and 29380 transitions. [2018-10-24 14:23:19,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 14:23:19,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1227 [2018-10-24 14:23:19,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:19,426 INFO L225 Difference]: With dead ends: 27972 [2018-10-24 14:23:19,426 INFO L226 Difference]: Without dead ends: 15054 [2018-10-24 14:23:19,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-24 14:23:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2018-10-24 14:23:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14570. [2018-10-24 14:23:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14570 states. [2018-10-24 14:23:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14570 states to 14570 states and 15272 transitions. [2018-10-24 14:23:19,607 INFO L78 Accepts]: Start accepts. Automaton has 14570 states and 15272 transitions. Word has length 1227 [2018-10-24 14:23:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:19,608 INFO L481 AbstractCegarLoop]: Abstraction has 14570 states and 15272 transitions. [2018-10-24 14:23:19,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:23:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 14570 states and 15272 transitions. [2018-10-24 14:23:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1239 [2018-10-24 14:23:19,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:19,640 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 14:23:19,640 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:19,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1167487614, now seen corresponding path program 1 times [2018-10-24 14:23:19,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:19,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:19,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:19,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:19,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2823 backedges. 995 proven. 0 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2018-10-24 14:23:21,941 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:23:21,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:23:21,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:23:21,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:23:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:21,943 INFO L87 Difference]: Start difference. First operand 14570 states and 15272 transitions. Second operand 4 states. [2018-10-24 14:23:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:24,471 INFO L93 Difference]: Finished difference Result 35070 states and 36795 transitions. [2018-10-24 14:23:24,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:23:24,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1238 [2018-10-24 14:23:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:24,487 INFO L225 Difference]: With dead ends: 35070 [2018-10-24 14:23:24,487 INFO L226 Difference]: Without dead ends: 17182 [2018-10-24 14:23:24,494 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 [2018-10-24 14:23:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2018-10-24 14:23:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 16852. [2018-10-24 14:23:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16852 states. [2018-10-24 14:23:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16852 states to 16852 states and 17364 transitions. [2018-10-24 14:23:24,663 INFO L78 Accepts]: Start accepts. Automaton has 16852 states and 17364 transitions. Word has length 1238 [2018-10-24 14:23:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:24,665 INFO L481 AbstractCegarLoop]: Abstraction has 16852 states and 17364 transitions. [2018-10-24 14:23:24,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:23:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 16852 states and 17364 transitions. [2018-10-24 14:23:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1402 [2018-10-24 14:23:24,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:24,702 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 14:23:24,702 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:24,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:24,703 INFO L82 PathProgramCache]: Analyzing trace with hash -170585411, now seen corresponding path program 1 times [2018-10-24 14:23:24,703 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:24,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:24,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:24,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:24,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3761 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 3618 trivial. 0 not checked. [2018-10-24 14:23:26,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:23:26,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:23:26,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:23:26,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:23:26,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:26,677 INFO L87 Difference]: Start difference. First operand 16852 states and 17364 transitions. Second operand 4 states. [2018-10-24 14:23:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:28,654 INFO L93 Difference]: Finished difference Result 33702 states and 34735 transitions. [2018-10-24 14:23:28,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:23:28,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1401 [2018-10-24 14:23:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:28,672 INFO L225 Difference]: With dead ends: 33702 [2018-10-24 14:23:28,672 INFO L226 Difference]: Without dead ends: 15858 [2018-10-24 14:23:28,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:23:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15858 states. [2018-10-24 14:23:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15858 to 15528. [2018-10-24 14:23:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15528 states. [2018-10-24 14:23:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15528 states to 15528 states and 15903 transitions. [2018-10-24 14:23:28,830 INFO L78 Accepts]: Start accepts. Automaton has 15528 states and 15903 transitions. Word has length 1401 [2018-10-24 14:23:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:28,831 INFO L481 AbstractCegarLoop]: Abstraction has 15528 states and 15903 transitions. [2018-10-24 14:23:28,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:23:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 15528 states and 15903 transitions. [2018-10-24 14:23:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1841 [2018-10-24 14:23:28,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:28,889 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:28,890 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:28,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash -357593829, now seen corresponding path program 1 times [2018-10-24 14:23:28,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:28,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:28,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:28,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:28,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:30,052 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:23:30,461 WARN L179 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-24 14:23:30,931 WARN L179 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2018-10-24 14:23:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5634 backedges. 2494 proven. 243 refuted. 0 times theorem prover too weak. 2897 trivial. 0 not checked. [2018-10-24 14:23:34,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:23:34,797 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 [2018-10-24 14:23:34,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:35,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:23:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5634 backedges. 2494 proven. 0 refuted. 0 times theorem prover too weak. 3140 trivial. 0 not checked. [2018-10-24 14:23:37,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:23:37,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-24 14:23:37,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:23:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:23:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:23:37,565 INFO L87 Difference]: Start difference. First operand 15528 states and 15903 transitions. Second operand 10 states. [2018-10-24 14:23:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:44,969 INFO L93 Difference]: Finished difference Result 33040 states and 33839 transitions. [2018-10-24 14:23:44,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 14:23:44,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1840 [2018-10-24 14:23:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:44,984 INFO L225 Difference]: With dead ends: 33040 [2018-10-24 14:23:44,984 INFO L226 Difference]: Without dead ends: 17844 [2018-10-24 14:23:44,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1856 GetRequests, 1839 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-24 14:23:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17844 states. [2018-10-24 14:23:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17844 to 15858. [2018-10-24 14:23:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15858 states. [2018-10-24 14:23:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 16235 transitions. [2018-10-24 14:23:45,145 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 16235 transitions. Word has length 1840 [2018-10-24 14:23:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:45,145 INFO L481 AbstractCegarLoop]: Abstraction has 15858 states and 16235 transitions. [2018-10-24 14:23:45,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:23:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 16235 transitions. [2018-10-24 14:23:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1872 [2018-10-24 14:23:45,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:45,181 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:23:45,181 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:45,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2065057755, now seen corresponding path program 1 times [2018-10-24 14:23:45,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:45,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:45,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:45,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:45,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 2407 proven. 158 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2018-10-24 14:23:48,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:23:48,556 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 [2018-10-24 14:23:48,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:23:49,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:23:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 2565 proven. 0 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2018-10-24 14:23:51,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:23:51,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-24 14:23:51,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:23:51,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:23:51,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:23:51,020 INFO L87 Difference]: Start difference. First operand 15858 states and 16235 transitions. Second operand 10 states. [2018-10-24 14:23:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:23:58,657 INFO L93 Difference]: Finished difference Result 43040 states and 44142 transitions. [2018-10-24 14:23:58,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 14:23:58,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1871 [2018-10-24 14:23:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:23:58,682 INFO L225 Difference]: With dead ends: 43040 [2018-10-24 14:23:58,682 INFO L226 Difference]: Without dead ends: 27514 [2018-10-24 14:23:58,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1901 GetRequests, 1881 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-24 14:23:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27514 states. [2018-10-24 14:23:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27514 to 22184. [2018-10-24 14:23:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22184 states. [2018-10-24 14:23:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22184 states to 22184 states and 22683 transitions. [2018-10-24 14:23:58,905 INFO L78 Accepts]: Start accepts. Automaton has 22184 states and 22683 transitions. Word has length 1871 [2018-10-24 14:23:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:23:58,906 INFO L481 AbstractCegarLoop]: Abstraction has 22184 states and 22683 transitions. [2018-10-24 14:23:58,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:23:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 22184 states and 22683 transitions. [2018-10-24 14:23:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2281 [2018-10-24 14:23:59,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:23:59,040 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2018-10-24 14:23:59,040 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:23:59,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:23:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1235059713, now seen corresponding path program 1 times [2018-10-24 14:23:59,041 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:23:59,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:23:59,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:59,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:23:59,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:23:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9625 backedges. 2180 proven. 0 refuted. 0 times theorem prover too weak. 7445 trivial. 0 not checked. [2018-10-24 14:24:02,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:24:02,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:24:02,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:24:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:24:02,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:24:02,463 INFO L87 Difference]: Start difference. First operand 22184 states and 22683 transitions. Second operand 3 states. [2018-10-24 14:24:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:03,849 INFO L93 Difference]: Finished difference Result 45686 states and 46709 transitions. [2018-10-24 14:24:03,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:24:03,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2280 [2018-10-24 14:24:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:03,873 INFO L225 Difference]: With dead ends: 45686 [2018-10-24 14:24:03,873 INFO L226 Difference]: Without dead ends: 23172 [2018-10-24 14:24:03,887 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 [2018-10-24 14:24:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23172 states. [2018-10-24 14:24:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23172 to 22182. [2018-10-24 14:24:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22182 states. [2018-10-24 14:24:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 22638 transitions. [2018-10-24 14:24:04,097 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 22638 transitions. Word has length 2280 [2018-10-24 14:24:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:04,099 INFO L481 AbstractCegarLoop]: Abstraction has 22182 states and 22638 transitions. [2018-10-24 14:24:04,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:24:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 22638 transitions. [2018-10-24 14:24:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2316 [2018-10-24 14:24:04,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:04,156 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:24:04,157 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:04,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2139992758, now seen corresponding path program 1 times [2018-10-24 14:24:04,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:04,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:04,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:04,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:04,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:05,690 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:24:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9534 backedges. 4084 proven. 251 refuted. 0 times theorem prover too weak. 5199 trivial. 0 not checked. [2018-10-24 14:24:11,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:11,292 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:24:11,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:11,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9534 backedges. 5492 proven. 0 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2018-10-24 14:24:14,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:24:14,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-24 14:24:14,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 14:24:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 14:24:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-24 14:24:14,667 INFO L87 Difference]: Start difference. First operand 22182 states and 22638 transitions. Second operand 9 states. [2018-10-24 14:24:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:23,007 INFO L93 Difference]: Finished difference Result 47070 states and 48022 transitions. [2018-10-24 14:24:23,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 14:24:23,007 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2315 [2018-10-24 14:24:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:23,032 INFO L225 Difference]: With dead ends: 47070 [2018-10-24 14:24:23,032 INFO L226 Difference]: Without dead ends: 25220 [2018-10-24 14:24:23,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2334 GetRequests, 2318 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:24:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25220 states. [2018-10-24 14:24:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25220 to 21065. [2018-10-24 14:24:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21065 states. [2018-10-24 14:24:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21065 states to 21065 states and 21412 transitions. [2018-10-24 14:24:23,232 INFO L78 Accepts]: Start accepts. Automaton has 21065 states and 21412 transitions. Word has length 2315 [2018-10-24 14:24:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:23,233 INFO L481 AbstractCegarLoop]: Abstraction has 21065 states and 21412 transitions. [2018-10-24 14:24:23,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 14:24:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21065 states and 21412 transitions. [2018-10-24 14:24:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2669 [2018-10-24 14:24:23,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:23,290 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:24:23,290 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:23,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1700302108, now seen corresponding path program 1 times [2018-10-24 14:24:23,291 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:23,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:23,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11795 backedges. 8386 proven. 1504 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2018-10-24 14:24:33,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:33,067 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:24:33,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:33,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11795 backedges. 7341 proven. 0 refuted. 0 times theorem prover too weak. 4454 trivial. 0 not checked. [2018-10-24 14:24:37,539 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:24:37,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2018-10-24 14:24:37,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 14:24:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 14:24:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-10-24 14:24:37,547 INFO L87 Difference]: Start difference. First operand 21065 states and 21412 transitions. Second operand 11 states. [2018-10-24 14:24:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:45,353 INFO L93 Difference]: Finished difference Result 42490 states and 43193 transitions. [2018-10-24 14:24:45,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 14:24:45,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 2668 [2018-10-24 14:24:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:45,376 INFO L225 Difference]: With dead ends: 42490 [2018-10-24 14:24:45,376 INFO L226 Difference]: Without dead ends: 21757 [2018-10-24 14:24:45,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2689 GetRequests, 2671 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-10-24 14:24:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21757 states. [2018-10-24 14:24:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21757 to 21725. [2018-10-24 14:24:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21725 states. [2018-10-24 14:24:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21725 states to 21725 states and 22071 transitions. [2018-10-24 14:24:45,618 INFO L78 Accepts]: Start accepts. Automaton has 21725 states and 22071 transitions. Word has length 2668 [2018-10-24 14:24:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:45,619 INFO L481 AbstractCegarLoop]: Abstraction has 21725 states and 22071 transitions. [2018-10-24 14:24:45,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 14:24:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 21725 states and 22071 transitions. [2018-10-24 14:24:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2696 [2018-10-24 14:24:45,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:45,676 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-10-24 14:24:45,677 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:45,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:45,677 INFO L82 PathProgramCache]: Analyzing trace with hash 999630116, now seen corresponding path program 1 times [2018-10-24 14:24:45,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:45,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:45,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:45,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:45,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12565 backedges. 2207 proven. 18 refuted. 0 times theorem prover too weak. 10340 trivial. 0 not checked. [2018-10-24 14:24:50,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:24:50,181 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:24:50,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:24:50,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:24:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12565 backedges. 2207 proven. 18 refuted. 0 times theorem prover too weak. 10340 trivial. 0 not checked. [2018-10-24 14:24:53,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:24:53,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2018-10-24 14:24:53,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:24:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:24:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:24:53,683 INFO L87 Difference]: Start difference. First operand 21725 states and 22071 transitions. Second operand 5 states. [2018-10-24 14:24:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:24:56,462 INFO L93 Difference]: Finished difference Result 45027 states and 45770 transitions. [2018-10-24 14:24:56,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:24:56,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 2695 [2018-10-24 14:24:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:24:56,485 INFO L225 Difference]: With dead ends: 45027 [2018-10-24 14:24:56,485 INFO L226 Difference]: Without dead ends: 23303 [2018-10-24 14:24:56,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2699 GetRequests, 2694 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:24:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23303 states. [2018-10-24 14:24:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23303 to 22054. [2018-10-24 14:24:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22054 states. [2018-10-24 14:24:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 22381 transitions. [2018-10-24 14:24:56,907 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 22381 transitions. Word has length 2695 [2018-10-24 14:24:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:24:56,909 INFO L481 AbstractCegarLoop]: Abstraction has 22054 states and 22381 transitions. [2018-10-24 14:24:56,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:24:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 22381 transitions. [2018-10-24 14:24:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2708 [2018-10-24 14:24:56,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:24:56,974 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2018-10-24 14:24:56,975 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:24:56,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:24:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1848506455, now seen corresponding path program 1 times [2018-10-24 14:24:56,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:24:56,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:24:56,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:56,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:24:56,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:24:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13070 backedges. 10344 proven. 482 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2018-10-24 14:25:07,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:25:07,330 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:25:07,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:07,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:25:08,506 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-10-24 14:25:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13070 backedges. 9779 proven. 816 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-24 14:25:15,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 14:25:15,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2018-10-24 14:25:15,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 14:25:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 14:25:15,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-24 14:25:15,392 INFO L87 Difference]: Start difference. First operand 22054 states and 22381 transitions. Second operand 13 states. [2018-10-24 14:25:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:25:27,374 INFO L93 Difference]: Finished difference Result 46583 states and 47269 transitions. [2018-10-24 14:25:27,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 14:25:27,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 2707 [2018-10-24 14:25:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:25:27,397 INFO L225 Difference]: With dead ends: 46583 [2018-10-24 14:25:27,398 INFO L226 Difference]: Without dead ends: 24861 [2018-10-24 14:25:27,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2731 GetRequests, 2710 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2018-10-24 14:25:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24861 states. [2018-10-24 14:25:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24861 to 22384. [2018-10-24 14:25:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22384 states. [2018-10-24 14:25:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 22708 transitions. [2018-10-24 14:25:27,635 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 22708 transitions. Word has length 2707 [2018-10-24 14:25:27,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:25:27,637 INFO L481 AbstractCegarLoop]: Abstraction has 22384 states and 22708 transitions. [2018-10-24 14:25:27,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 14:25:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 22708 transitions. [2018-10-24 14:25:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2776 [2018-10-24 14:25:27,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:25:27,690 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2018-10-24 14:25:27,691 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:25:27,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:25:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1332012024, now seen corresponding path program 1 times [2018-10-24 14:25:27,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:25:27,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:25:27,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:27,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:27,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:25:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:29,492 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:25:29,826 WARN L179 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-24 14:25:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13903 backedges. 7433 proven. 2468 refuted. 0 times theorem prover too weak. 4002 trivial. 0 not checked. [2018-10-24 14:25:38,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:25:38,634 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 14:25:38,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:25:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:25:39,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:25:39,703 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 28 [2018-10-24 14:25:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13903 backedges. 8359 proven. 0 refuted. 0 times theorem prover too weak. 5544 trivial. 0 not checked. [2018-10-24 14:25:47,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:25:47,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 20 [2018-10-24 14:25:47,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 14:25:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 14:25:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-10-24 14:25:47,337 INFO L87 Difference]: Start difference. First operand 22384 states and 22708 transitions. Second operand 20 states. Received shutdown request... [2018-10-24 14:25:49,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:25:49,874 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:25:49,880 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:25:49,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:25:49 BoogieIcfgContainer [2018-10-24 14:25:49,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:25:49,881 INFO L168 Benchmark]: Toolchain (without parser) took 226718.56 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -237.7 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-10-24 14:25:49,882 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. [2018-10-24 14:25:49,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1138.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:25:49,884 INFO L168 Benchmark]: Boogie Procedure Inliner took 340.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-24 14:25:49,884 INFO L168 Benchmark]: Boogie Preprocessor took 163.73 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2018-10-24 14:25:49,885 INFO L168 Benchmark]: RCFGBuilder took 7038.31 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 281.0 MB). Peak memory consumption was 281.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:25:49,886 INFO L168 Benchmark]: TraceAbstraction took 218031.45 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.7 GB in the end (delta: 254.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-24 14:25:49,891 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 1138.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 340.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.73 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7038.31 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 281.0 MB). Peak memory consumption was 281.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218031.45 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 1.7 GB in the end (delta: 254.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 64). Cancelled while BasicCegarLoop was constructing difference of abstraction (22384states) and FLOYD_HOARE automaton (currently 5 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (488 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 217.9s OverallTime, 21 OverallIterations, 14 TraceHistogramMax, 108.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4774 SDtfs, 31555 SDslu, 2232 SDs, 0 SdLazy, 71817 SolverSat, 5153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18378 GetRequests, 18194 SyntacticMatches, 37 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22384occurred in iteration=20, 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: 3.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 20261 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 50.8s InterpolantComputationTime, 44874 NumberOfCodeBlocks, 44874 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 44844 ConstructedInterpolants, 498 QuantifiedInterpolants, 319557256 SizeOfPredicates, 6 NumberOfNonLiveVariables, 20674 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 30 InterpolantComputations, 19 PerfectInterpolantSequences, 163027/169270 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown