java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:03:39,346 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:03:39,349 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:03:39,362 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:03:39,362 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:03:39,363 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:03:39,364 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:03:39,366 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:03:39,368 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:03:39,369 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:03:39,370 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:03:39,370 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:03:39,371 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:03:39,372 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:03:39,373 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:03:39,374 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:03:39,375 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:03:39,377 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:03:39,379 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:03:39,380 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:03:39,381 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:03:39,383 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:03:39,385 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:03:39,385 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:03:39,386 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:03:39,387 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:03:39,388 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:03:39,389 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:03:39,390 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:03:39,391 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:03:39,391 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:03:39,392 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:03:39,392 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:03:39,392 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:03:39,393 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:03:39,394 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:03:39,395 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:03:39,422 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:03:39,422 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:03:39,425 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:03:39,426 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:03:39,426 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:03:39,426 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:03:39,426 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:03:39,427 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:03:39,427 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:03:39,427 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:03:39,427 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:03:39,428 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:03:39,428 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:03:39,429 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:03:39,429 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:03:39,429 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:03:39,429 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:03:39,430 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:03:39,430 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:03:39,431 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:03:39,431 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:03:39,431 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:03:39,431 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:03:39,431 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:03:39,432 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:03:39,432 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:03:39,432 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:03:39,432 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:03:39,433 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:03:39,433 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:03:39,433 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:03:39,433 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:03:39,434 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:03:39,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:03:39,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:03:39,509 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:03:39,511 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:03:39,512 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:03:39,513 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-09-14 16:03:39,909 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb50fc0b9/2bcad3fba5644c579af455611eecc8ed/FLAGb3288a652 [2018-09-14 16:03:40,281 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:03:40,283 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label23_true-unreach-call.c [2018-09-14 16:03:40,305 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb50fc0b9/2bcad3fba5644c579af455611eecc8ed/FLAGb3288a652 [2018-09-14 16:03:40,328 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb50fc0b9/2bcad3fba5644c579af455611eecc8ed [2018-09-14 16:03:40,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:03:40,342 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:03:40,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:03:40,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:03:40,349 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:03:40,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:03:40" (1/1) ... [2018-09-14 16:03:40,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5df79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:40, skipping insertion in model container [2018-09-14 16:03:40,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:03:40" (1/1) ... [2018-09-14 16:03:40,365 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:03:41,165 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:03:41,191 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:03:41,452 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:03:41,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41 WrapperNode [2018-09-14 16:03:41,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:03:41,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:03:41,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:03:41,533 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:03:41,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:41,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:41,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:03:41,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:03:41,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:03:41,698 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:03:41,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:41,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:41,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:41,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:42,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:42,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:42,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... [2018-09-14 16:03:42,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:03:42,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:03:42,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:03:42,102 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:03:42,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory: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 [2018-09-14 16:03:42,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:03:42,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:03:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:03:42,187 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:03:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:03:42,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:03:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:03:42,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:03:47,867 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:03:47,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:03:47 BoogieIcfgContainer [2018-09-14 16:03:47,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:03:47,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:03:47,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:03:47,873 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:03:47,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:03:40" (1/3) ... [2018-09-14 16:03:47,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e456c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:03:47, skipping insertion in model container [2018-09-14 16:03:47,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:03:41" (2/3) ... [2018-09-14 16:03:47,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e456c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:03:47, skipping insertion in model container [2018-09-14 16:03:47,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:03:47" (3/3) ... [2018-09-14 16:03:47,880 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label23_true-unreach-call.c [2018-09-14 16:03:47,893 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:03:47,904 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:03:47,983 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:03:47,984 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:03:47,984 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:03:47,984 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:03:47,984 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:03:47,984 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:03:47,985 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:03:47,985 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:03:47,985 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:03:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:03:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-14 16:03:48,051 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:48,052 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:48,054 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1250104911, now seen corresponding path program 1 times [2018-09-14 16:03:48,063 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:48,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:48,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:48,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:48,124 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:49,317 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:49,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:03:49,317 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:49,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:03:49,341 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:03:49,342 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:03:49,344 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-14 16:03:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:52,528 INFO L93 Difference]: Finished difference Result 1084 states and 1945 transitions. [2018-09-14 16:03:52,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:03:52,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2018-09-14 16:03:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:52,559 INFO L225 Difference]: With dead ends: 1084 [2018-09-14 16:03:52,559 INFO L226 Difference]: Without dead ends: 766 [2018-09-14 16:03:52,568 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:03:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2018-09-14 16:03:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 524. [2018-09-14 16:03:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-09-14 16:03:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 918 transitions. [2018-09-14 16:03:52,670 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 918 transitions. Word has length 178 [2018-09-14 16:03:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:52,672 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 918 transitions. [2018-09-14 16:03:52,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:03:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 918 transitions. [2018-09-14 16:03:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-14 16:03:52,680 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:52,680 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:52,681 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash -217139872, now seen corresponding path program 1 times [2018-09-14 16:03:52,681 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:52,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:52,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:52,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:52,683 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:53,073 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:53,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 16:03:53,073 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:53,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:03:53,075 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:03:53,076 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 16:03:53,076 INFO L87 Difference]: Start difference. First operand 524 states and 918 transitions. Second operand 5 states. [2018-09-14 16:03:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:56,337 INFO L93 Difference]: Finished difference Result 1614 states and 2930 transitions. [2018-09-14 16:03:56,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:03:56,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2018-09-14 16:03:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:56,359 INFO L225 Difference]: With dead ends: 1614 [2018-09-14 16:03:56,360 INFO L226 Difference]: Without dead ends: 1096 [2018-09-14 16:03:56,368 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:03:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2018-09-14 16:03:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1073. [2018-09-14 16:03:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-09-14 16:03:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1769 transitions. [2018-09-14 16:03:56,461 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1769 transitions. Word has length 189 [2018-09-14 16:03:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:56,461 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1769 transitions. [2018-09-14 16:03:56,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:03:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1769 transitions. [2018-09-14 16:03:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-09-14 16:03:56,469 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:56,469 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-14 16:03:56,469 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1010977333, now seen corresponding path program 1 times [2018-09-14 16:03:56,472 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:56,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:56,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:56,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:56,474 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:56,889 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:56,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:03:56,890 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:56,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:03:56,891 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:03:56,891 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:56,891 INFO L87 Difference]: Start difference. First operand 1073 states and 1769 transitions. Second operand 3 states. [2018-09-14 16:03:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:59,433 INFO L93 Difference]: Finished difference Result 3100 states and 5252 transitions. [2018-09-14 16:03:59,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:03:59,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2018-09-14 16:03:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:59,457 INFO L225 Difference]: With dead ends: 3100 [2018-09-14 16:03:59,457 INFO L226 Difference]: Without dead ends: 2033 [2018-09-14 16:03:59,463 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:03:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2018-09-14 16:03:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2030. [2018-09-14 16:03:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2018-09-14 16:03:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3203 transitions. [2018-09-14 16:03:59,547 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3203 transitions. Word has length 191 [2018-09-14 16:03:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:59,548 INFO L480 AbstractCegarLoop]: Abstraction has 2030 states and 3203 transitions. [2018-09-14 16:03:59,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:03:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3203 transitions. [2018-09-14 16:03:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-14 16:03:59,559 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:59,560 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-14 16:03:59,560 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1402232081, now seen corresponding path program 1 times [2018-09-14 16:03:59,562 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:59,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:59,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:59,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:59,563 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:03:59,956 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:03:59,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:03:59,956 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:59,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:03:59,957 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:03:59,957 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:03:59,957 INFO L87 Difference]: Start difference. First operand 2030 states and 3203 transitions. Second operand 6 states. [2018-09-14 16:04:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:02,985 INFO L93 Difference]: Finished difference Result 5883 states and 9834 transitions. [2018-09-14 16:04:02,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 16:04:02,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2018-09-14 16:04:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:03,017 INFO L225 Difference]: With dead ends: 5883 [2018-09-14 16:04:03,018 INFO L226 Difference]: Without dead ends: 3859 [2018-09-14 16:04:03,028 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:04:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2018-09-14 16:04:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3792. [2018-09-14 16:04:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3792 states. [2018-09-14 16:04:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 5638 transitions. [2018-09-14 16:04:03,192 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 5638 transitions. Word has length 193 [2018-09-14 16:04:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:03,193 INFO L480 AbstractCegarLoop]: Abstraction has 3792 states and 5638 transitions. [2018-09-14 16:04:03,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 5638 transitions. [2018-09-14 16:04:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-14 16:04:03,205 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:03,206 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:03,206 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash 943603689, now seen corresponding path program 1 times [2018-09-14 16:04:03,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:03,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:03,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:03,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:03,208 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:03,569 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:04:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:03,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:03,881 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:03,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:03,894 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:04,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-14 16:04:04,525 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:04,779 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:04:04,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 12 [2018-09-14 16:04:04,780 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:04,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:04,781 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:04,781 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:04,781 INFO L87 Difference]: Start difference. First operand 3792 states and 5638 transitions. Second operand 5 states. [2018-09-14 16:04:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:08,350 INFO L93 Difference]: Finished difference Result 10320 states and 16160 transitions. [2018-09-14 16:04:08,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:04:08,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2018-09-14 16:04:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:08,399 INFO L225 Difference]: With dead ends: 10320 [2018-09-14 16:04:08,399 INFO L226 Difference]: Without dead ends: 6534 [2018-09-14 16:04:08,423 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:04:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2018-09-14 16:04:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 6414. [2018-09-14 16:04:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6414 states. [2018-09-14 16:04:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6414 states to 6414 states and 9151 transitions. [2018-09-14 16:04:08,653 INFO L78 Accepts]: Start accepts. Automaton has 6414 states and 9151 transitions. Word has length 208 [2018-09-14 16:04:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:08,653 INFO L480 AbstractCegarLoop]: Abstraction has 6414 states and 9151 transitions. [2018-09-14 16:04:08,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6414 states and 9151 transitions. [2018-09-14 16:04:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-14 16:04:08,669 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:08,670 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:04:08,670 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1528109442, now seen corresponding path program 1 times [2018-09-14 16:04:08,671 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:08,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:08,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:08,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:08,672 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:09,242 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:04:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:09,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:09,432 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:09,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:09,448 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:09,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:10,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:10,488 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-14 16:04:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:10,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:10,903 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:10,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:10,932 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:11,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:04:11,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:04:11,906 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:04:11,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 8, 8, 5] total 15 [2018-09-14 16:04:11,907 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:11,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:11,908 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:11,908 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:04:11,908 INFO L87 Difference]: Start difference. First operand 6414 states and 9151 transitions. Second operand 5 states. [2018-09-14 16:04:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:14,495 INFO L93 Difference]: Finished difference Result 19146 states and 27693 transitions. [2018-09-14 16:04:14,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:04:14,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-09-14 16:04:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:14,579 INFO L225 Difference]: With dead ends: 19146 [2018-09-14 16:04:14,579 INFO L226 Difference]: Without dead ends: 12738 [2018-09-14 16:04:14,605 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 859 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:04:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12738 states. [2018-09-14 16:04:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12738 to 12714. [2018-09-14 16:04:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12714 states. [2018-09-14 16:04:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12714 states to 12714 states and 18161 transitions. [2018-09-14 16:04:15,016 INFO L78 Accepts]: Start accepts. Automaton has 12714 states and 18161 transitions. Word has length 217 [2018-09-14 16:04:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:15,016 INFO L480 AbstractCegarLoop]: Abstraction has 12714 states and 18161 transitions. [2018-09-14 16:04:15,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 12714 states and 18161 transitions. [2018-09-14 16:04:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-09-14 16:04:15,042 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:15,042 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:15,043 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2142918717, now seen corresponding path program 1 times [2018-09-14 16:04:15,043 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:15,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:15,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:15,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:15,045 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:15,345 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-09-14 16:04:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 83 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:15,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:15,812 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:15,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:15,823 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:16,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:04:16,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:04:16,702 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:04:16,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2018-09-14 16:04:16,702 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:16,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:04:16,704 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:04:16,704 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:04:16,705 INFO L87 Difference]: Start difference. First operand 12714 states and 18161 transitions. Second operand 3 states. [2018-09-14 16:04:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:18,395 INFO L93 Difference]: Finished difference Result 25416 states and 36319 transitions. [2018-09-14 16:04:18,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:04:18,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 269 [2018-09-14 16:04:18,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:18,447 INFO L225 Difference]: With dead ends: 25416 [2018-09-14 16:04:18,447 INFO L226 Difference]: Without dead ends: 12708 [2018-09-14 16:04:18,493 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:04:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12708 states. [2018-09-14 16:04:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12708 to 12708. [2018-09-14 16:04:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12708 states. [2018-09-14 16:04:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12708 states to 12708 states and 18146 transitions. [2018-09-14 16:04:18,816 INFO L78 Accepts]: Start accepts. Automaton has 12708 states and 18146 transitions. Word has length 269 [2018-09-14 16:04:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:18,817 INFO L480 AbstractCegarLoop]: Abstraction has 12708 states and 18146 transitions. [2018-09-14 16:04:18,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:04:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 12708 states and 18146 transitions. [2018-09-14 16:04:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-09-14 16:04:18,844 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:18,845 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:18,845 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:18,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1152525042, now seen corresponding path program 1 times [2018-09-14 16:04:18,846 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:18,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:18,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:18,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:18,847 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 89 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:19,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:19,610 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 16:04:19,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:19,630 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:19,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:04:20,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 89 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:20,731 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:04:20,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:04:20,732 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:20,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:04:20,732 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:04:20,733 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:04:20,733 INFO L87 Difference]: Start difference. First operand 12708 states and 18146 transitions. Second operand 5 states. [2018-09-14 16:04:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:23,376 INFO L93 Difference]: Finished difference Result 35384 states and 51340 transitions. [2018-09-14 16:04:23,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:04:23,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2018-09-14 16:04:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:23,467 INFO L225 Difference]: With dead ends: 35384 [2018-09-14 16:04:23,467 INFO L226 Difference]: Without dead ends: 22682 [2018-09-14 16:04:23,493 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 541 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:04:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22682 states. [2018-09-14 16:04:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22682 to 21770. [2018-09-14 16:04:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21770 states. [2018-09-14 16:04:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21770 states to 21770 states and 30954 transitions. [2018-09-14 16:04:24,104 INFO L78 Accepts]: Start accepts. Automaton has 21770 states and 30954 transitions. Word has length 273 [2018-09-14 16:04:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:24,104 INFO L480 AbstractCegarLoop]: Abstraction has 21770 states and 30954 transitions. [2018-09-14 16:04:24,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:04:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21770 states and 30954 transitions. [2018-09-14 16:04:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-14 16:04:24,136 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:24,137 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:24,137 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash 967894443, now seen corresponding path program 1 times [2018-09-14 16:04:24,138 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:24,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:24,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:24,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:24,139 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:24,811 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:04:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:25,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:25,032 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:25,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:25,049 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:25,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:26,096 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-14 16:04:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:26,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:26,721 WARN L178 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-14 16:04:27,200 WARN L178 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-14 16:04:27,736 WARN L178 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2018-09-14 16:04:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:28,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:28,273 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:28,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:28,295 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:28,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:29,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:29,316 WARN L178 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-14 16:04:29,540 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:04:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:30,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:30,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-14 16:04:30,252 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:30,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:04:30,253 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:04:30,253 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:04:30,253 INFO L87 Difference]: Start difference. First operand 21770 states and 30954 transitions. Second operand 9 states. [2018-09-14 16:04:40,222 WARN L178 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2018-09-14 16:04:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:41,008 INFO L93 Difference]: Finished difference Result 75860 states and 151079 transitions. [2018-09-14 16:04:41,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-14 16:04:41,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 294 [2018-09-14 16:04:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:41,503 INFO L225 Difference]: With dead ends: 75860 [2018-09-14 16:04:41,504 INFO L226 Difference]: Without dead ends: 54096 [2018-09-14 16:04:41,683 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1193 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2018-09-14 16:04:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54096 states. [2018-09-14 16:04:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54096 to 47079. [2018-09-14 16:04:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47079 states. [2018-09-14 16:04:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47079 states to 47079 states and 64158 transitions. [2018-09-14 16:04:44,119 INFO L78 Accepts]: Start accepts. Automaton has 47079 states and 64158 transitions. Word has length 294 [2018-09-14 16:04:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:44,120 INFO L480 AbstractCegarLoop]: Abstraction has 47079 states and 64158 transitions. [2018-09-14 16:04:44,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:04:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 47079 states and 64158 transitions. [2018-09-14 16:04:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-09-14 16:04:44,201 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:44,202 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:04:44,202 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1889915048, now seen corresponding path program 1 times [2018-09-14 16:04:44,204 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:44,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:44,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:44,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:44,205 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 128 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:04:44,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:44,824 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:45,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:45,398 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:45,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:45,988 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:04:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:04:46,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:46,378 WARN L178 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 16:04:46,669 WARN L178 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 16:04:47,209 WARN L178 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2018-09-14 16:04:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 128 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:04:47,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:47,367 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:04:47,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:47,384 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:47,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:04:48,623 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:48,828 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 16:04:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 122 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:04:49,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:04:49,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 8, 8] total 13 [2018-09-14 16:04:49,100 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:04:49,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:04:49,101 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:04:49,101 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:04:49,101 INFO L87 Difference]: Start difference. First operand 47079 states and 64158 transitions. Second operand 6 states. [2018-09-14 16:04:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:04:53,834 INFO L93 Difference]: Finished difference Result 104656 states and 161857 transitions. [2018-09-14 16:04:53,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:04:53,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 305 [2018-09-14 16:04:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:04:54,201 INFO L225 Difference]: With dead ends: 104656 [2018-09-14 16:04:54,201 INFO L226 Difference]: Without dead ends: 57603 [2018-09-14 16:04:54,300 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1233 GetRequests, 1215 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:04:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57603 states. [2018-09-14 16:04:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57603 to 54894. [2018-09-14 16:04:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54894 states. [2018-09-14 16:04:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54894 states to 54894 states and 73949 transitions. [2018-09-14 16:04:55,972 INFO L78 Accepts]: Start accepts. Automaton has 54894 states and 73949 transitions. Word has length 305 [2018-09-14 16:04:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:04:55,973 INFO L480 AbstractCegarLoop]: Abstraction has 54894 states and 73949 transitions. [2018-09-14 16:04:55,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:04:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 54894 states and 73949 transitions. [2018-09-14 16:04:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-09-14 16:04:56,023 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:04:56,023 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:04:56,024 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:04:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash 780645126, now seen corresponding path program 1 times [2018-09-14 16:04:56,024 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:04:56,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:56,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:56,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:04:56,026 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:04:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:04:56,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:04:56,702 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:04:56,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:04:56,719 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:04:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:04:56,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:04:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-14 16:04:57,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:04:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-14 16:04:57,720 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:04:57,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:04:57,721 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:04:57,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:04:57,721 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:04:57,721 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:04:57,722 INFO L87 Difference]: Start difference. First operand 54894 states and 73949 transitions. Second operand 3 states. [2018-09-14 16:05:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:00,305 INFO L93 Difference]: Finished difference Result 123330 states and 167693 transitions. [2018-09-14 16:05:00,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:00,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2018-09-14 16:05:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:00,543 INFO L225 Difference]: With dead ends: 123330 [2018-09-14 16:05:00,543 INFO L226 Difference]: Without dead ends: 68890 [2018-09-14 16:05:00,653 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 632 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:05:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68890 states. [2018-09-14 16:05:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68890 to 68845. [2018-09-14 16:05:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68845 states. [2018-09-14 16:05:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68845 states to 68845 states and 90828 transitions. [2018-09-14 16:05:02,096 INFO L78 Accepts]: Start accepts. Automaton has 68845 states and 90828 transitions. Word has length 317 [2018-09-14 16:05:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:02,097 INFO L480 AbstractCegarLoop]: Abstraction has 68845 states and 90828 transitions. [2018-09-14 16:05:02,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 68845 states and 90828 transitions. [2018-09-14 16:05:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-09-14 16:05:02,151 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:02,151 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:05:02,152 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1856147380, now seen corresponding path program 1 times [2018-09-14 16:05:02,152 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:02,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:02,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:02,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:02,153 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 143 proven. 46 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-14 16:05:02,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:02,646 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:02,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:02,654 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:02,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-09-14 16:05:03,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 159 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-09-14 16:05:03,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:03,366 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:03,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:03,382 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:03,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-09-14 16:05:04,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 159 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-09-14 16:05:04,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:04,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 21 [2018-09-14 16:05:04,467 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:04,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 16:05:04,468 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 16:05:04,468 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2018-09-14 16:05:04,468 INFO L87 Difference]: Start difference. First operand 68845 states and 90828 transitions. Second operand 13 states. [2018-09-14 16:06:02,250 WARN L178 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-09-14 16:06:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:16,649 INFO L93 Difference]: Finished difference Result 850854 states and 1567698 transitions. [2018-09-14 16:06:16,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-14 16:06:16,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 324 [2018-09-14 16:06:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:24,401 INFO L225 Difference]: With dead ends: 850854 [2018-09-14 16:06:24,402 INFO L226 Difference]: Without dead ends: 782035 [2018-09-14 16:06:25,251 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1561 GetRequests, 1413 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8699 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2668, Invalid=19384, Unknown=0, NotChecked=0, Total=22052 [2018-09-14 16:06:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782035 states. [2018-09-14 16:06:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782035 to 755499. [2018-09-14 16:06:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755499 states.