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/Problem18_label38_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 14:39:46,368 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 14:39:46,374 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 14:39:46,391 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 14:39:46,391 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 14:39:46,392 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 14:39:46,394 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 14:39:46,396 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 14:39:46,398 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 14:39:46,399 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 14:39:46,400 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 14:39:46,400 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 14:39:46,403 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 14:39:46,405 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 14:39:46,413 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 14:39:46,413 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 14:39:46,417 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 14:39:46,420 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 14:39:46,422 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 14:39:46,424 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 14:39:46,428 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 14:39:46,430 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 14:39:46,434 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 14:39:46,435 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 14:39:46,435 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 14:39:46,436 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 14:39:46,437 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 14:39:46,437 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 14:39:46,439 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 14:39:46,442 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 14:39:46,442 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 14:39:46,443 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 14:39:46,443 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 14:39:46,443 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 14:39:46,445 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 14:39:46,446 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 14:39:46,446 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 14:39:46,472 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 14:39:46,472 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 14:39:46,474 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 14:39:46,474 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 14:39:46,475 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 14:39:46,475 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 14:39:46,475 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 14:39:46,475 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 14:39:46,477 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 14:39:46,477 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 14:39:46,477 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 14:39:46,477 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 14:39:46,477 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 14:39:46,478 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 14:39:46,478 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 14:39:46,478 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 14:39:46,478 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 14:39:46,478 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 14:39:46,479 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 14:39:46,480 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 14:39:46,480 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 14:39:46,480 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 14:39:46,480 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 14:39:46,480 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 14:39:46,481 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 14:39:46,481 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 14:39:46,481 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 14:39:46,481 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 14:39:46,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 14:39:46,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 14:39:46,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 14:39:46,571 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 14:39:46,573 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 14:39:46,573 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label38_false-unreach-call.c [2018-10-24 14:39:46,629 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ceb9272e5/fafb021c8dc54383a5c196230c20ffb0/FLAG9ca26f1d2 [2018-10-24 14:39:47,386 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 14:39:47,387 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label38_false-unreach-call.c [2018-10-24 14:39:47,417 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ceb9272e5/fafb021c8dc54383a5c196230c20ffb0/FLAG9ca26f1d2 [2018-10-24 14:39:47,435 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ceb9272e5/fafb021c8dc54383a5c196230c20ffb0 [2018-10-24 14:39:47,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 14:39:47,448 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 14:39:47,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 14:39:47,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 14:39:47,454 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 14:39:47,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:39:47" (1/1) ... [2018-10-24 14:39:47,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4dd763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:47, skipping insertion in model container [2018-10-24 14:39:47,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:39:47" (1/1) ... [2018-10-24 14:39:47,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 14:39:47,608 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 14:39:48,653 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:39:48,658 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 14:39:49,110 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 14:39:49,141 INFO L193 MainTranslator]: Completed translation [2018-10-24 14:39:49,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49 WrapperNode [2018-10-24 14:39:49,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 14:39:49,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 14:39:49,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 14:39:49,143 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 14:39:49,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 14:39:49,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 14:39:49,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 14:39:49,644 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 14:39:49,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (1/1) ... [2018-10-24 14:39:49,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 14:39:49,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 14:39:49,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 14:39:49,908 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 14:39:49,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (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 14:39:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 14:39:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 14:39:49,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 14:39:57,322 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 14:39:57,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:39:57 BoogieIcfgContainer [2018-10-24 14:39:57,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 14:39:57,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 14:39:57,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 14:39:57,333 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 14:39:57,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:39:47" (1/3) ... [2018-10-24 14:39:57,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5260b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:39:57, skipping insertion in model container [2018-10-24 14:39:57,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:49" (2/3) ... [2018-10-24 14:39:57,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5260b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:39:57, skipping insertion in model container [2018-10-24 14:39:57,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:39:57" (3/3) ... [2018-10-24 14:39:57,338 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label38_false-unreach-call.c [2018-10-24 14:39:57,348 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 14:39:57,362 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 14:39:57,379 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 14:39:57,429 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 14:39:57,429 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 14:39:57,430 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 14:39:57,430 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 14:39:57,430 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 14:39:57,430 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 14:39:57,430 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 14:39:57,430 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 14:39:57,430 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 14:39:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states. [2018-10-24 14:39:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 14:39:57,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:39:57,479 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 14:39:57,481 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:39:57,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:39:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1407492386, now seen corresponding path program 1 times [2018-10-24 14:39:57,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:39:57,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:39:57,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:57,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:39:57,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:39:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:39:57,859 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 14:39:57,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:39:57,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:39:57,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:39:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:39:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:39:57,887 INFO L87 Difference]: Start difference. First operand 758 states. Second operand 4 states. [2018-10-24 14:40:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:09,768 INFO L93 Difference]: Finished difference Result 2918 states and 5666 transitions. [2018-10-24 14:40:09,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:40:09,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-10-24 14:40:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:09,817 INFO L225 Difference]: With dead ends: 2918 [2018-10-24 14:40:09,818 INFO L226 Difference]: Without dead ends: 2153 [2018-10-24 14:40:09,824 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 14:40:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2018-10-24 14:40:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2153. [2018-10-24 14:40:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2018-10-24 14:40:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3619 transitions. [2018-10-24 14:40:09,985 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3619 transitions. Word has length 21 [2018-10-24 14:40:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:40:09,985 INFO L481 AbstractCegarLoop]: Abstraction has 2153 states and 3619 transitions. [2018-10-24 14:40:09,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:40:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3619 transitions. [2018-10-24 14:40:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 14:40:09,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:09,990 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 14:40:09,990 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:09,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:09,991 INFO L82 PathProgramCache]: Analyzing trace with hash -950809615, now seen corresponding path program 1 times [2018-10-24 14:40:09,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:09,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:09,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:09,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:09,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 14:40:10,202 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:40:10,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:40:10,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:40:10,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:40:10,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:40:10,204 INFO L87 Difference]: Start difference. First operand 2153 states and 3619 transitions. Second operand 4 states. [2018-10-24 14:40:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:18,554 INFO L93 Difference]: Finished difference Result 6377 states and 10776 transitions. [2018-10-24 14:40:18,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:40:18,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2018-10-24 14:40:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:18,579 INFO L225 Difference]: With dead ends: 6377 [2018-10-24 14:40:18,579 INFO L226 Difference]: Without dead ends: 4226 [2018-10-24 14:40:18,584 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 14:40:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2018-10-24 14:40:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 4226. [2018-10-24 14:40:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4226 states. [2018-10-24 14:40:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4226 states to 4226 states and 6043 transitions. [2018-10-24 14:40:18,665 INFO L78 Accepts]: Start accepts. Automaton has 4226 states and 6043 transitions. Word has length 87 [2018-10-24 14:40:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:40:18,666 INFO L481 AbstractCegarLoop]: Abstraction has 4226 states and 6043 transitions. [2018-10-24 14:40:18,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:40:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4226 states and 6043 transitions. [2018-10-24 14:40:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-24 14:40:18,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:18,677 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:18,677 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:18,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -542909622, now seen corresponding path program 1 times [2018-10-24 14:40:18,677 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:18,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:18,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:18,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:18,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:19,351 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-10-24 14:40:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-24 14:40:19,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:40:19,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:40:19,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:40:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:40:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:40:19,573 INFO L87 Difference]: Start difference. First operand 4226 states and 6043 transitions. Second operand 5 states. [2018-10-24 14:40:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:28,410 INFO L93 Difference]: Finished difference Result 13287 states and 18113 transitions. [2018-10-24 14:40:28,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 14:40:28,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2018-10-24 14:40:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:28,452 INFO L225 Difference]: With dead ends: 13287 [2018-10-24 14:40:28,453 INFO L226 Difference]: Without dead ends: 9063 [2018-10-24 14:40:28,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:40:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2018-10-24 14:40:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 8372. [2018-10-24 14:40:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8372 states. [2018-10-24 14:40:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8372 states to 8372 states and 10467 transitions. [2018-10-24 14:40:28,610 INFO L78 Accepts]: Start accepts. Automaton has 8372 states and 10467 transitions. Word has length 206 [2018-10-24 14:40:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:40:28,611 INFO L481 AbstractCegarLoop]: Abstraction has 8372 states and 10467 transitions. [2018-10-24 14:40:28,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:40:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 8372 states and 10467 transitions. [2018-10-24 14:40:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-24 14:40:28,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:28,629 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 14:40:28,629 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:28,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash -860925135, now seen corresponding path program 1 times [2018-10-24 14:40:28,630 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:28,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:28,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:28,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 268 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-10-24 14:40:29,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:40:29,268 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 14:40:29,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:29,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:40:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-24 14:40:29,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:40:29,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 14:40:29,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 14:40:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 14:40:29,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 14:40:29,620 INFO L87 Difference]: Start difference. First operand 8372 states and 10467 transitions. Second operand 6 states. [2018-10-24 14:40:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:41,693 INFO L93 Difference]: Finished difference Result 26432 states and 32780 transitions. [2018-10-24 14:40:41,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:40:41,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 389 [2018-10-24 14:40:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:41,760 INFO L225 Difference]: With dead ends: 26432 [2018-10-24 14:40:41,760 INFO L226 Difference]: Without dead ends: 15986 [2018-10-24 14:40:41,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:40:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15986 states. [2018-10-24 14:40:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15986 to 11810. [2018-10-24 14:40:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11810 states. [2018-10-24 14:40:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11810 states to 11810 states and 13599 transitions. [2018-10-24 14:40:42,021 INFO L78 Accepts]: Start accepts. Automaton has 11810 states and 13599 transitions. Word has length 389 [2018-10-24 14:40:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:40:42,021 INFO L481 AbstractCegarLoop]: Abstraction has 11810 states and 13599 transitions. [2018-10-24 14:40:42,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 14:40:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 11810 states and 13599 transitions. [2018-10-24 14:40:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-24 14:40:42,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:42,031 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:42,032 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:42,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash -24667633, now seen corresponding path program 1 times [2018-10-24 14:40:42,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:42,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:42,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:42,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:42,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-10-24 14:40:43,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:40:43,086 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 14:40:43,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:43,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:40:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-24 14:40:43,455 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:40:43,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-24 14:40:43,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 14:40:43,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 14:40:43,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 14:40:43,458 INFO L87 Difference]: Start difference. First operand 11810 states and 13599 transitions. Second operand 5 states. [2018-10-24 14:40:43,627 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-24 14:40:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:40:55,632 INFO L93 Difference]: Finished difference Result 47115 states and 55729 transitions. [2018-10-24 14:40:55,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 14:40:55,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 394 [2018-10-24 14:40:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:40:55,695 INFO L225 Difference]: With dead ends: 47115 [2018-10-24 14:40:55,695 INFO L226 Difference]: Without dead ends: 35307 [2018-10-24 14:40:55,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 14:40:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35307 states. [2018-10-24 14:40:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35307 to 34616. [2018-10-24 14:40:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34616 states. [2018-10-24 14:40:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34616 states to 34616 states and 39995 transitions. [2018-10-24 14:40:56,138 INFO L78 Accepts]: Start accepts. Automaton has 34616 states and 39995 transitions. Word has length 394 [2018-10-24 14:40:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:40:56,138 INFO L481 AbstractCegarLoop]: Abstraction has 34616 states and 39995 transitions. [2018-10-24 14:40:56,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 14:40:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 34616 states and 39995 transitions. [2018-10-24 14:40:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2018-10-24 14:40:56,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:40:56,177 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:56,177 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:40:56,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:40:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1816944839, now seen corresponding path program 1 times [2018-10-24 14:40:56,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:40:56,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:40:56,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:56,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:40:56,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:40:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:40:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2018-10-24 14:40:57,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:40:57,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:40:57,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:40:57,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:40:57,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:40:57,576 INFO L87 Difference]: Start difference. First operand 34616 states and 39995 transitions. Second operand 3 states. [2018-10-24 14:41:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:00,842 INFO L93 Difference]: Finished difference Result 68539 states and 79296 transitions. [2018-10-24 14:41:00,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:41:00,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1029 [2018-10-24 14:41:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:00,905 INFO L225 Difference]: With dead ends: 68539 [2018-10-24 14:41:00,906 INFO L226 Difference]: Without dead ends: 34616 [2018-10-24 14:41:00,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:41:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34616 states. [2018-10-24 14:41:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34616 to 34616. [2018-10-24 14:41:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34616 states. [2018-10-24 14:41:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34616 states to 34616 states and 38576 transitions. [2018-10-24 14:41:01,299 INFO L78 Accepts]: Start accepts. Automaton has 34616 states and 38576 transitions. Word has length 1029 [2018-10-24 14:41:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:01,301 INFO L481 AbstractCegarLoop]: Abstraction has 34616 states and 38576 transitions. [2018-10-24 14:41:01,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:41:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34616 states and 38576 transitions. [2018-10-24 14:41:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2018-10-24 14:41:01,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:01,383 INFO L375 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:01,383 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:01,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:01,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1904474763, now seen corresponding path program 1 times [2018-10-24 14:41:01,384 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:01,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:01,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:01,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:01,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2018-10-24 14:41:02,931 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:02,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:41:02,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:41:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:41:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:02,934 INFO L87 Difference]: Start difference. First operand 34616 states and 38576 transitions. Second operand 4 states. [2018-10-24 14:41:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:08,683 INFO L93 Difference]: Finished difference Result 87887 states and 98563 transitions. [2018-10-24 14:41:08,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:41:08,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1209 [2018-10-24 14:41:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:08,760 INFO L225 Difference]: With dead ends: 87887 [2018-10-24 14:41:08,761 INFO L226 Difference]: Without dead ends: 48416 [2018-10-24 14:41:08,786 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 14:41:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48416 states. [2018-10-24 14:41:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48416 to 47725. [2018-10-24 14:41:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47725 states. [2018-10-24 14:41:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47725 states to 47725 states and 51902 transitions. [2018-10-24 14:41:09,237 INFO L78 Accepts]: Start accepts. Automaton has 47725 states and 51902 transitions. Word has length 1209 [2018-10-24 14:41:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:09,238 INFO L481 AbstractCegarLoop]: Abstraction has 47725 states and 51902 transitions. [2018-10-24 14:41:09,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 47725 states and 51902 transitions. [2018-10-24 14:41:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1243 [2018-10-24 14:41:09,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:09,267 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:09,268 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:09,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1245542691, now seen corresponding path program 1 times [2018-10-24 14:41:09,268 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:09,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:09,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:09,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:09,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 862 proven. 750 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-24 14:41:13,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:41:13,649 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 14:41:13,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:13,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:41:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 1005 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2018-10-24 14:41:14,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:41:14,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2018-10-24 14:41:14,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 14:41:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 14:41:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-10-24 14:41:14,989 INFO L87 Difference]: Start difference. First operand 47725 states and 51902 transitions. Second operand 13 states. [2018-10-24 14:41:17,992 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2018-10-24 14:41:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:42,683 INFO L93 Difference]: Finished difference Result 139118 states and 150993 transitions. [2018-10-24 14:41:42,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 14:41:42,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1242 [2018-10-24 14:41:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:42,848 INFO L225 Difference]: With dead ends: 139118 [2018-10-24 14:41:42,848 INFO L226 Difference]: Without dead ends: 92086 [2018-10-24 14:41:42,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 1265 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 14:41:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92086 states. [2018-10-24 14:41:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92086 to 64308. [2018-10-24 14:41:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64308 states. [2018-10-24 14:41:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64308 states to 64308 states and 69059 transitions. [2018-10-24 14:41:43,681 INFO L78 Accepts]: Start accepts. Automaton has 64308 states and 69059 transitions. Word has length 1242 [2018-10-24 14:41:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:43,683 INFO L481 AbstractCegarLoop]: Abstraction has 64308 states and 69059 transitions. [2018-10-24 14:41:43,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 14:41:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64308 states and 69059 transitions. [2018-10-24 14:41:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2018-10-24 14:41:43,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:43,718 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:43,718 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:43,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1296922160, now seen corresponding path program 1 times [2018-10-24 14:41:43,720 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:43,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:43,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:43,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:43,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:44,501 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-10-24 14:41:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1789 backedges. 1176 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-10-24 14:41:45,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:41:45,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:41:45,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:41:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:41:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:45,284 INFO L87 Difference]: Start difference. First operand 64308 states and 69059 transitions. Second operand 4 states. [2018-10-24 14:41:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:41:50,189 INFO L93 Difference]: Finished difference Result 141051 states and 151823 transitions. [2018-10-24 14:41:50,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:41:50,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1260 [2018-10-24 14:41:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:41:50,277 INFO L225 Difference]: With dead ends: 141051 [2018-10-24 14:41:50,277 INFO L226 Difference]: Without dead ends: 77436 [2018-10-24 14:41:50,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:41:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77436 states. [2018-10-24 14:41:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77436 to 76745. [2018-10-24 14:41:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76745 states. [2018-10-24 14:41:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76745 states to 76745 states and 81167 transitions. [2018-10-24 14:41:51,249 INFO L78 Accepts]: Start accepts. Automaton has 76745 states and 81167 transitions. Word has length 1260 [2018-10-24 14:41:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:41:51,250 INFO L481 AbstractCegarLoop]: Abstraction has 76745 states and 81167 transitions. [2018-10-24 14:41:51,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:41:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 76745 states and 81167 transitions. [2018-10-24 14:41:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2018-10-24 14:41:51,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:41:51,272 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:51,272 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:41:51,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:41:51,272 INFO L82 PathProgramCache]: Analyzing trace with hash 214685907, now seen corresponding path program 1 times [2018-10-24 14:41:51,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:41:51,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:41:51,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:51,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:51,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:41:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:52,127 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 14:41:52,441 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-24 14:41:52,712 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-10-24 14:41:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 967 proven. 585 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2018-10-24 14:41:55,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:41:55,015 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 14:41:55,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:41:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:41:55,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:41:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 1101 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2018-10-24 14:41:56,708 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:41:56,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2018-10-24 14:41:56,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 14:41:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 14:41:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 14:41:56,710 INFO L87 Difference]: Start difference. First operand 76745 states and 81167 transitions. Second operand 10 states. [2018-10-24 14:42:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:14,410 INFO L93 Difference]: Finished difference Result 282462 states and 298620 transitions. [2018-10-24 14:42:14,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 14:42:14,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1274 [2018-10-24 14:42:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:14,608 INFO L225 Difference]: With dead ends: 282462 [2018-10-24 14:42:14,608 INFO L226 Difference]: Without dead ends: 187691 [2018-10-24 14:42:14,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 1286 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2018-10-24 14:42:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187691 states. [2018-10-24 14:42:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187691 to 76724. [2018-10-24 14:42:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76724 states. [2018-10-24 14:42:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76724 states to 76724 states and 79713 transitions. [2018-10-24 14:42:16,231 INFO L78 Accepts]: Start accepts. Automaton has 76724 states and 79713 transitions. Word has length 1274 [2018-10-24 14:42:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:16,232 INFO L481 AbstractCegarLoop]: Abstraction has 76724 states and 79713 transitions. [2018-10-24 14:42:16,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 14:42:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 76724 states and 79713 transitions. [2018-10-24 14:42:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1313 [2018-10-24 14:42:16,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:16,253 INFO L375 BasicCegarLoop]: trace histogram [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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:16,253 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:16,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:16,254 INFO L82 PathProgramCache]: Analyzing trace with hash -231780996, now seen corresponding path program 1 times [2018-10-24 14:42:16,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:16,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:16,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:16,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:16,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2135 backedges. 1164 proven. 0 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2018-10-24 14:42:17,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:42:17,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:42:17,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:42:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:42:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:17,691 INFO L87 Difference]: Start difference. First operand 76724 states and 79713 transitions. Second operand 4 states. [2018-10-24 14:42:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:22,261 INFO L93 Difference]: Finished difference Result 164502 states and 171151 transitions. [2018-10-24 14:42:22,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:42:22,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1312 [2018-10-24 14:42:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:22,347 INFO L225 Difference]: With dead ends: 164502 [2018-10-24 14:42:22,347 INFO L226 Difference]: Without dead ends: 88471 [2018-10-24 14:42:22,386 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 14:42:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88471 states. [2018-10-24 14:42:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88471 to 87089. [2018-10-24 14:42:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87089 states. [2018-10-24 14:42:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87089 states to 87089 states and 90239 transitions. [2018-10-24 14:42:23,131 INFO L78 Accepts]: Start accepts. Automaton has 87089 states and 90239 transitions. Word has length 1312 [2018-10-24 14:42:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:23,131 INFO L481 AbstractCegarLoop]: Abstraction has 87089 states and 90239 transitions. [2018-10-24 14:42:23,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:42:23,132 INFO L276 IsEmpty]: Start isEmpty. Operand 87089 states and 90239 transitions. [2018-10-24 14:42:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1552 [2018-10-24 14:42:23,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:23,170 INFO L375 BasicCegarLoop]: trace histogram [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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:23,171 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:23,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash 805523431, now seen corresponding path program 1 times [2018-10-24 14:42:23,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:23,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:23,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:23,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:23,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 2029 proven. 0 refuted. 0 times theorem prover too weak. 1186 trivial. 0 not checked. [2018-10-24 14:42:25,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:42:25,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 14:42:25,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 14:42:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 14:42:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 14:42:25,190 INFO L87 Difference]: Start difference. First operand 87089 states and 90239 transitions. Second operand 4 states. [2018-10-24 14:42:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:30,792 INFO L93 Difference]: Finished difference Result 210104 states and 218499 transitions. [2018-10-24 14:42:30,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 14:42:30,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1551 [2018-10-24 14:42:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:30,913 INFO L225 Difference]: With dead ends: 210104 [2018-10-24 14:42:30,913 INFO L226 Difference]: Without dead ends: 123708 [2018-10-24 14:42:30,962 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 14:42:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123708 states. [2018-10-24 14:42:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123708 to 122326. [2018-10-24 14:42:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122326 states. [2018-10-24 14:42:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122326 states to 122326 states and 125797 transitions. [2018-10-24 14:42:32,043 INFO L78 Accepts]: Start accepts. Automaton has 122326 states and 125797 transitions. Word has length 1551 [2018-10-24 14:42:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:32,044 INFO L481 AbstractCegarLoop]: Abstraction has 122326 states and 125797 transitions. [2018-10-24 14:42:32,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 14:42:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 122326 states and 125797 transitions. [2018-10-24 14:42:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1584 [2018-10-24 14:42:32,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:32,338 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:32,338 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:32,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1219854873, now seen corresponding path program 1 times [2018-10-24 14:42:32,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:32,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:32,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:32,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:32,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3031 backedges. 899 proven. 0 refuted. 0 times theorem prover too weak. 2132 trivial. 0 not checked. [2018-10-24 14:42:34,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 14:42:34,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 14:42:34,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 14:42:34,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 14:42:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:42:34,485 INFO L87 Difference]: Start difference. First operand 122326 states and 125797 transitions. Second operand 3 states. [2018-10-24 14:42:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:42:38,325 INFO L93 Difference]: Finished difference Result 243266 states and 250251 transitions. [2018-10-24 14:42:38,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 14:42:38,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1583 [2018-10-24 14:42:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:42:38,436 INFO L225 Difference]: With dead ends: 243266 [2018-10-24 14:42:38,436 INFO L226 Difference]: Without dead ends: 120250 [2018-10-24 14:42:38,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 14:42:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120250 states. [2018-10-24 14:42:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120250 to 118868. [2018-10-24 14:42:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118868 states. [2018-10-24 14:42:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118868 states to 118868 states and 122015 transitions. [2018-10-24 14:42:39,748 INFO L78 Accepts]: Start accepts. Automaton has 118868 states and 122015 transitions. Word has length 1583 [2018-10-24 14:42:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 14:42:39,749 INFO L481 AbstractCegarLoop]: Abstraction has 118868 states and 122015 transitions. [2018-10-24 14:42:39,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 14:42:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 118868 states and 122015 transitions. [2018-10-24 14:42:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1674 [2018-10-24 14:42:39,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 14:42:39,801 INFO L375 BasicCegarLoop]: trace histogram [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, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:42:39,801 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 14:42:39,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 14:42:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash -897894694, now seen corresponding path program 1 times [2018-10-24 14:42:39,802 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 14:42:39,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 14:42:39,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:39,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:39,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 14:42:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:40,743 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 14:42:40,931 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-10-24 14:42:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1829 proven. 1266 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2018-10-24 14:42:45,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 14:42:45,626 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 14:42:45,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 14:42:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 14:42:45,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 14:42:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 909 proven. 0 refuted. 0 times theorem prover too weak. 2371 trivial. 0 not checked. [2018-10-24 14:42:47,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 14:42:47,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [16] total 18 [2018-10-24 14:42:47,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 14:42:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 14:42:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-10-24 14:42:47,353 INFO L87 Difference]: Start difference. First operand 118868 states and 122015 transitions. Second operand 18 states. [2018-10-24 14:43:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 14:43:36,976 INFO L93 Difference]: Finished difference Result 252279 states and 258735 transitions. [2018-10-24 14:43:36,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 14:43:36,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1673 [2018-10-24 14:43:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 14:43:37,092 INFO L225 Difference]: With dead ends: 252279 [2018-10-24 14:43:37,092 INFO L226 Difference]: Without dead ends: 129886 [2018-10-24 14:43:37,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1699 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=326, Invalid=1836, Unknown=0, NotChecked=0, Total=2162 Received shutdown request... [2018-10-24 14:43:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129886 states. [2018-10-24 14:43:37,221 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 14:43:37,225 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 14:43:37,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:43:37 BoogieIcfgContainer [2018-10-24 14:43:37,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 14:43:37,226 INFO L168 Benchmark]: Toolchain (without parser) took 229779.26 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -636.0 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-24 14:43:37,227 INFO L168 Benchmark]: CDTParser took 0.22 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 14:43:37,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1692.90 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:43:37,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 500.99 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 801.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -962.7 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2018-10-24 14:43:37,230 INFO L168 Benchmark]: Boogie Preprocessor took 263.69 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2018-10-24 14:43:37,230 INFO L168 Benchmark]: RCFGBuilder took 7415.42 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 542.4 MB). Peak memory consumption was 542.4 MB. Max. memory is 7.1 GB. [2018-10-24 14:43:37,231 INFO L168 Benchmark]: TraceAbstraction took 219901.21 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 2.1 GB in the end (delta: -391.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 14:43:37,238 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1692.90 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: 148.0 MB). Peak memory consumption was 148.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 500.99 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 801.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -962.7 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 263.69 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7415.42 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 542.4 MB). Peak memory consumption was 542.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219901.21 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.7 GB in the beginning and 2.1 GB in the end (delta: -391.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 69). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 758 locations, 1 error locations. TIMEOUT Result, 219.8s OverallTime, 14 OverallIterations, 9 TraceHistogramMax, 178.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7917 SDtfs, 65500 SDslu, 2803 SDs, 0 SdLazy, 147156 SolverSat, 13019 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 138.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5201 GetRequests, 5051 SyntacticMatches, 15 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122326occurred in iteration=12, 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: 8.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 149831 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 18202 NumberOfCodeBlocks, 18202 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 18183 ConstructedInterpolants, 0 QuantifiedInterpolants, 67442445 SizeOfPredicates, 1 NumberOfNonLiveVariables, 5804 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 19 InterpolantComputations, 14 PerfectInterpolantSequences, 24479/27092 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown