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/Problem11_label48_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:25:50,372 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:25:50,376 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:25:50,388 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:25:50,389 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:25:50,390 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:25:50,391 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:25:50,393 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:25:50,394 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:25:50,395 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:25:50,396 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:25:50,396 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:25:50,397 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:25:50,400 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:25:50,403 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:25:50,404 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:25:50,407 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:25:50,412 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:25:50,414 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:25:50,417 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:25:50,420 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:25:50,423 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:25:50,425 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:25:50,429 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:25:50,429 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:25:50,430 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:25:50,432 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:25:50,433 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:25:50,434 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:25:50,435 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:25:50,435 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:25:50,436 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 11:25:50,436 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 11:25:50,436 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 11:25:50,439 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 11:25:50,440 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 11:25:50,440 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 [2018-09-18 11:25:50,470 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:25:50,470 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:25:50,471 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:25:50,472 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:25:50,472 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:25:50,472 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:25:50,472 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:25:50,472 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:25:50,473 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:25:50,473 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:25:50,473 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:25:50,473 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:25:50,474 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:25:50,474 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:25:50,474 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:25:50,474 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:25:50,475 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:25:50,475 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:25:50,475 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:25:50,475 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:25:50,475 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:25:50,476 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:25:50,476 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:25:50,476 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:25:50,476 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:25:50,476 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:25:50,477 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:25:50,477 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:25:50,477 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:25:50,477 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:25:50,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:25:50,478 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:25:50,478 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:25:50,478 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:25:50,520 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:25:50,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:25:50,541 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:25:50,543 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:25:50,543 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:25:50,544 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c [2018-09-18 11:25:50,891 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b68456d/92d7cd1bb6bb4d6f9a90947bda83296b/FLAGf9c470019 [2018-09-18 11:25:51,235 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:25:51,236 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c [2018-09-18 11:25:51,252 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b68456d/92d7cd1bb6bb4d6f9a90947bda83296b/FLAGf9c470019 [2018-09-18 11:25:51,276 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b68456d/92d7cd1bb6bb4d6f9a90947bda83296b [2018-09-18 11:25:51,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:25:51,292 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:25:51,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:25:51,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:25:51,300 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:25:51,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:25:51" (1/1) ... [2018-09-18 11:25:51,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a614e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:51, skipping insertion in model container [2018-09-18 11:25:51,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:25:51" (1/1) ... [2018-09-18 11:25:51,317 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:25:51,985 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:25:52,005 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:25:52,185 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:25:52,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52 WrapperNode [2018-09-18 11:25:52,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:25:52,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:25:52,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:25:52,252 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:25:52,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:25:52,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:25:52,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:25:52,409 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:25:52,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (1/1) ... [2018-09-18 11:25:52,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:25:52,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:25:52,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:25:52,754 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:25:52,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (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 [2018-09-18 11:25:52,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:25:52,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:25:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:25:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:25:52,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:25:52,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:25:52,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:25:52,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:25:57,234 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:25:57,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:25:57 BoogieIcfgContainer [2018-09-18 11:25:57,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:25:57,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:25:57,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:25:57,240 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:25:57,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:25:51" (1/3) ... [2018-09-18 11:25:57,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3cd9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:25:57, skipping insertion in model container [2018-09-18 11:25:57,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:25:52" (2/3) ... [2018-09-18 11:25:57,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3cd9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:25:57, skipping insertion in model container [2018-09-18 11:25:57,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:25:57" (3/3) ... [2018-09-18 11:25:57,244 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label48_true-unreach-call.c [2018-09-18 11:25:57,254 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:25:57,264 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:25:57,332 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:25:57,333 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:25:57,333 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:25:57,333 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:25:57,333 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:25:57,333 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:25:57,334 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:25:57,334 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:25:57,334 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:25:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-18 11:25:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-18 11:25:57,378 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:25:57,379 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] [2018-09-18 11:25:57,380 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:25:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1192581977, now seen corresponding path program 1 times [2018-09-18 11:25:57,387 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:25:57,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:57,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:57,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:57,437 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:25:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:25:57,967 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:25:57,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:25:57,968 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:25:57,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:25:57,993 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:25:57,994 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:25:57,998 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-09-18 11:26:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:01,320 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-09-18 11:26:01,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:26:01,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-09-18 11:26:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:01,346 INFO L225 Difference]: With dead ends: 979 [2018-09-18 11:26:01,347 INFO L226 Difference]: Without dead ends: 680 [2018-09-18 11:26:01,357 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 [2018-09-18 11:26:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-09-18 11:26:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-09-18 11:26:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-18 11:26:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-09-18 11:26:01,492 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 57 [2018-09-18 11:26:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:01,492 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-09-18 11:26:01,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:26:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-09-18 11:26:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-18 11:26:01,504 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:01,505 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:01,505 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:01,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1879663307, now seen corresponding path program 1 times [2018-09-18 11:26:01,507 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:01,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:01,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:01,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:01,510 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:01,860 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:26:01,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 11:26:01,860 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:26:01,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:26:01,863 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:26:01,863 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 11:26:01,864 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-09-18 11:26:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:05,541 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-09-18 11:26:05,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:26:05,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-09-18 11:26:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:05,556 INFO L225 Difference]: With dead ends: 1555 [2018-09-18 11:26:05,556 INFO L226 Difference]: Without dead ends: 1077 [2018-09-18 11:26:05,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:26:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-09-18 11:26:05,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-09-18 11:26:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-09-18 11:26:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-09-18 11:26:05,614 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 130 [2018-09-18 11:26:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:05,615 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-09-18 11:26:05,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:26:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-09-18 11:26:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-18 11:26:05,620 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:05,620 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:05,621 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash -399877285, now seen corresponding path program 1 times [2018-09-18 11:26:05,621 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:05,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:05,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:05,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:05,623 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:05,874 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:26:05,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 11:26:05,874 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:26:05,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:26:05,875 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:26:05,875 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-18 11:26:05,875 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 6 states. [2018-09-18 11:26:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:11,144 INFO L93 Difference]: Finished difference Result 3493 states and 5404 transitions. [2018-09-18 11:26:11,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:26:11,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2018-09-18 11:26:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:11,165 INFO L225 Difference]: With dead ends: 3493 [2018-09-18 11:26:11,166 INFO L226 Difference]: Without dead ends: 2436 [2018-09-18 11:26:11,173 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:26:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2018-09-18 11:26:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2393. [2018-09-18 11:26:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2393 states. [2018-09-18 11:26:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3322 transitions. [2018-09-18 11:26:11,260 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3322 transitions. Word has length 138 [2018-09-18 11:26:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:11,262 INFO L480 AbstractCegarLoop]: Abstraction has 2393 states and 3322 transitions. [2018-09-18 11:26:11,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:26:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3322 transitions. [2018-09-18 11:26:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-18 11:26:11,274 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:11,274 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:11,275 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1244588704, now seen corresponding path program 1 times [2018-09-18 11:26:11,276 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:11,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:11,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:11,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:11,277 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:11,937 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-09-18 11:26:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:26:12,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:12,045 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 [2018-09-18 11:26:12,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:12,063 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:12,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-18 11:26:12,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:13,097 WARN L178 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 11:26:13,294 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-18 11:26:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:26:13,837 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:26:13,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-18 11:26:13,837 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:26:13,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:26:13,838 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:26:13,839 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:26:13,839 INFO L87 Difference]: Start difference. First operand 2393 states and 3322 transitions. Second operand 5 states. [2018-09-18 11:26:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:18,004 INFO L93 Difference]: Finished difference Result 6582 states and 9085 transitions. [2018-09-18 11:26:18,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:26:18,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2018-09-18 11:26:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:18,029 INFO L225 Difference]: With dead ends: 6582 [2018-09-18 11:26:18,030 INFO L226 Difference]: Without dead ends: 4195 [2018-09-18 11:26:18,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 421 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:26:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2018-09-18 11:26:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4094. [2018-09-18 11:26:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4094 states. [2018-09-18 11:26:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 5593 transitions. [2018-09-18 11:26:18,148 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 5593 transitions. Word has length 212 [2018-09-18 11:26:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:18,149 INFO L480 AbstractCegarLoop]: Abstraction has 4094 states and 5593 transitions. [2018-09-18 11:26:18,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:26:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 5593 transitions. [2018-09-18 11:26:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-18 11:26:18,156 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:18,157 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:18,157 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1358707587, now seen corresponding path program 1 times [2018-09-18 11:26:18,157 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:18,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:18,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:18,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:18,159 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:18,720 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-18 11:26:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-18 11:26:19,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:19,049 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 [2018-09-18 11:26:19,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:19,061 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:19,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:19,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:19,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:19,765 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 [2018-09-18 11:26:19,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:19,795 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:19,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:20,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:20,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:26:20,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 17 [2018-09-18 11:26:20,708 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:26:20,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 11:26:20,709 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 11:26:20,709 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-09-18 11:26:20,710 INFO L87 Difference]: Start difference. First operand 4094 states and 5593 transitions. Second operand 10 states. [2018-09-18 11:26:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:37,364 INFO L93 Difference]: Finished difference Result 20735 states and 34480 transitions. [2018-09-18 11:26:37,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-18 11:26:37,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 255 [2018-09-18 11:26:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:37,528 INFO L225 Difference]: With dead ends: 20735 [2018-09-18 11:26:37,528 INFO L226 Difference]: Without dead ends: 16647 [2018-09-18 11:26:37,628 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 1047 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=985, Invalid=4715, Unknown=0, NotChecked=0, Total=5700 [2018-09-18 11:26:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16647 states. [2018-09-18 11:26:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16647 to 15287. [2018-09-18 11:26:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15287 states. [2018-09-18 11:26:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 20298 transitions. [2018-09-18 11:26:38,202 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 20298 transitions. Word has length 255 [2018-09-18 11:26:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:38,202 INFO L480 AbstractCegarLoop]: Abstraction has 15287 states and 20298 transitions. [2018-09-18 11:26:38,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 11:26:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 20298 transitions. [2018-09-18 11:26:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-18 11:26:38,216 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:38,216 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:38,217 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2050879004, now seen corresponding path program 1 times [2018-09-18 11:26:38,217 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:38,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:38,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:38,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:38,220 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:26:38,627 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:26:38,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:26:38,627 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:26:38,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:26:38,634 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:26:38,634 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:26:38,634 INFO L87 Difference]: Start difference. First operand 15287 states and 20298 transitions. Second operand 4 states. [2018-09-18 11:26:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:41,496 INFO L93 Difference]: Finished difference Result 39372 states and 54772 transitions. [2018-09-18 11:26:41,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:26:41,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 276 [2018-09-18 11:26:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:41,600 INFO L225 Difference]: With dead ends: 39372 [2018-09-18 11:26:41,600 INFO L226 Difference]: Without dead ends: 24598 [2018-09-18 11:26:41,647 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:26:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24598 states. [2018-09-18 11:26:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24598 to 22225. [2018-09-18 11:26:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22225 states. [2018-09-18 11:26:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22225 states to 22225 states and 29008 transitions. [2018-09-18 11:26:42,156 INFO L78 Accepts]: Start accepts. Automaton has 22225 states and 29008 transitions. Word has length 276 [2018-09-18 11:26:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:42,157 INFO L480 AbstractCegarLoop]: Abstraction has 22225 states and 29008 transitions. [2018-09-18 11:26:42,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:26:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 22225 states and 29008 transitions. [2018-09-18 11:26:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-18 11:26:42,199 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:42,199 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:42,200 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1398455572, now seen corresponding path program 1 times [2018-09-18 11:26:42,200 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:42,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:42,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:42,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:42,201 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:43,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:43,900 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 [2018-09-18 11:26:43,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:43,908 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:44,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:44,221 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:44,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:44,827 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:26:44,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:44,844 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:45,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:45,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:45,507 WARN L178 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 11:26:45,861 WARN L178 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 11:26:46,334 WARN L178 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2018-09-18 11:26:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:26:46,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:26:46,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 5, 5] total 19 [2018-09-18 11:26:46,710 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:26:46,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-18 11:26:46,711 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-18 11:26:46,711 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-09-18 11:26:46,712 INFO L87 Difference]: Start difference. First operand 22225 states and 29008 transitions. Second operand 17 states. [2018-09-18 11:26:48,781 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-09-18 11:26:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:58,545 INFO L93 Difference]: Finished difference Result 46365 states and 71871 transitions. [2018-09-18 11:26:58,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-18 11:26:58,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 338 [2018-09-18 11:26:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:58,713 INFO L225 Difference]: With dead ends: 46365 [2018-09-18 11:26:58,713 INFO L226 Difference]: Without dead ends: 24653 [2018-09-18 11:26:58,807 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1421 GetRequests, 1365 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=795, Invalid=2397, Unknown=0, NotChecked=0, Total=3192 [2018-09-18 11:26:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24653 states. [2018-09-18 11:26:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24653 to 23288. [2018-09-18 11:26:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23288 states. [2018-09-18 11:26:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23288 states to 23288 states and 29995 transitions. [2018-09-18 11:26:59,844 INFO L78 Accepts]: Start accepts. Automaton has 23288 states and 29995 transitions. Word has length 338 [2018-09-18 11:26:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:59,845 INFO L480 AbstractCegarLoop]: Abstraction has 23288 states and 29995 transitions. [2018-09-18 11:26:59,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-18 11:26:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23288 states and 29995 transitions. [2018-09-18 11:26:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-18 11:26:59,891 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:59,891 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:59,892 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash 916207623, now seen corresponding path program 1 times [2018-09-18 11:26:59,892 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:59,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:59,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:59,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:59,893 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:00,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:00,588 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 [2018-09-18 11:27:00,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:00,604 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:00,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:01,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:01,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:01,564 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 [2018-09-18 11:27:01,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:01,579 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:01,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:01,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:02,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:27:02,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-18 11:27:02,149 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:27:02,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:27:02,150 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:27:02,150 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:27:02,150 INFO L87 Difference]: Start difference. First operand 23288 states and 29995 transitions. Second operand 9 states. [2018-09-18 11:27:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:27:08,403 INFO L93 Difference]: Finished difference Result 57606 states and 98972 transitions. [2018-09-18 11:27:08,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 11:27:08,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 354 [2018-09-18 11:27:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:27:08,684 INFO L225 Difference]: With dead ends: 57606 [2018-09-18 11:27:08,684 INFO L226 Difference]: Without dead ends: 34324 [2018-09-18 11:27:08,848 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1442 GetRequests, 1415 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:27:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34324 states. [2018-09-18 11:27:09,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34324 to 32400. [2018-09-18 11:27:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32400 states. [2018-09-18 11:27:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32400 states to 32400 states and 47410 transitions. [2018-09-18 11:27:10,170 INFO L78 Accepts]: Start accepts. Automaton has 32400 states and 47410 transitions. Word has length 354 [2018-09-18 11:27:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:27:10,171 INFO L480 AbstractCegarLoop]: Abstraction has 32400 states and 47410 transitions. [2018-09-18 11:27:10,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:27:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 32400 states and 47410 transitions. [2018-09-18 11:27:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-09-18 11:27:10,225 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:27:10,225 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:27:10,226 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:27:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1824579026, now seen corresponding path program 1 times [2018-09-18 11:27:10,226 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:27:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:27:10,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:27:10,227 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:27:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:10,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:10,607 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 [2018-09-18 11:27:10,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:10,614 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:11,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:11,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:11,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:11,312 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 [2018-09-18 11:27:11,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:11,330 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:11,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 225 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:27:11,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:12,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:27:12,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 8 [2018-09-18 11:27:12,166 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:27:12,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:27:12,168 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:27:12,168 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:27:12,168 INFO L87 Difference]: Start difference. First operand 32400 states and 47410 transitions. Second operand 6 states. [2018-09-18 11:27:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:27:15,255 INFO L93 Difference]: Finished difference Result 68389 states and 111292 transitions. [2018-09-18 11:27:15,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:27:15,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 355 [2018-09-18 11:27:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:27:15,453 INFO L225 Difference]: With dead ends: 68389 [2018-09-18 11:27:15,453 INFO L226 Difference]: Without dead ends: 28715 [2018-09-18 11:27:15,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1416 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:27:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28715 states. [2018-09-18 11:27:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28715 to 26349. [2018-09-18 11:27:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26349 states. [2018-09-18 11:27:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26349 states to 26349 states and 34747 transitions. [2018-09-18 11:27:16,985 INFO L78 Accepts]: Start accepts. Automaton has 26349 states and 34747 transitions. Word has length 355 [2018-09-18 11:27:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:27:16,986 INFO L480 AbstractCegarLoop]: Abstraction has 26349 states and 34747 transitions. [2018-09-18 11:27:16,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:27:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 26349 states and 34747 transitions. [2018-09-18 11:27:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-09-18 11:27:17,005 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:27:17,005 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:27:17,006 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:27:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2031821643, now seen corresponding path program 1 times [2018-09-18 11:27:17,006 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:27:17,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:27:17,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:17,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:27:17,007 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:27:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:17,606 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-18 11:27:17,917 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-09-18 11:27:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 285 proven. 48 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-09-18 11:27:18,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:18,954 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 [2018-09-18 11:27:18,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:18,963 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:19,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:19,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:19,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:19,925 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:27:19,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:19,941 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:20,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:20,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:27:21,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:27:21,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 5, 5] total 23 [2018-09-18 11:27:21,447 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:27:21,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 11:27:21,449 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 11:27:21,449 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:27:21,449 INFO L87 Difference]: Start difference. First operand 26349 states and 34747 transitions. Second operand 18 states. [2018-09-18 11:27:23,332 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-09-18 11:27:23,589 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-09-18 11:27:24,096 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-09-18 11:27:28,703 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2018-09-18 11:27:32,858 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2018-09-18 11:27:33,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:27:33,977 INFO L93 Difference]: Finished difference Result 53826 states and 84456 transitions. [2018-09-18 11:27:33,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-18 11:27:33,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 359 [2018-09-18 11:27:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:27:34,468 INFO L225 Difference]: With dead ends: 53826 [2018-09-18 11:27:34,468 INFO L226 Difference]: Without dead ends: 26186 [2018-09-18 11:27:34,552 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1526 GetRequests, 1460 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=914, Invalid=2992, Unknown=0, NotChecked=0, Total=3906 [2018-09-18 11:27:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26186 states. [2018-09-18 11:27:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26186 to 23734. [2018-09-18 11:27:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23734 states. [2018-09-18 11:27:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23734 states to 23734 states and 31529 transitions. [2018-09-18 11:27:35,364 INFO L78 Accepts]: Start accepts. Automaton has 23734 states and 31529 transitions. Word has length 359 [2018-09-18 11:27:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:27:35,365 INFO L480 AbstractCegarLoop]: Abstraction has 23734 states and 31529 transitions. [2018-09-18 11:27:35,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 11:27:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23734 states and 31529 transitions. [2018-09-18 11:27:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-18 11:27:35,375 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:27:35,375 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:27:35,375 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:27:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1669162080, now seen corresponding path program 1 times [2018-09-18 11:27:35,375 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:27:35,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:27:35,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:35,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:27:35,376 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:27:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 123 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:27:36,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:36,192 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:27:36,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:36,200 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:36,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:36,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:37,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:27:37,080 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:27:37,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:27:37,097 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:27:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:27:37,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:27:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:37,433 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:27:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:27:37,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:27:37,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-09-18 11:27:37,856 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:27:37,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-18 11:27:37,857 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-18 11:27:37,857 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-09-18 11:27:37,858 INFO L87 Difference]: Start difference. First operand 23734 states and 31529 transitions. Second operand 20 states. [2018-09-18 11:27:39,429 WARN L178 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-09-18 11:27:43,276 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2018-09-18 11:27:48,317 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2018-09-18 11:27:53,165 WARN L178 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-09-18 11:27:57,573 WARN L178 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-09-18 11:28:02,394 WARN L178 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2018-09-18 11:28:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:28:06,163 INFO L93 Difference]: Finished difference Result 60754 states and 85655 transitions. [2018-09-18 11:28:06,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-18 11:28:06,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 360 [2018-09-18 11:28:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:28:06,275 INFO L225 Difference]: With dead ends: 60754 [2018-09-18 11:28:06,275 INFO L226 Difference]: Without dead ends: 33202 [2018-09-18 11:28:06,389 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1542 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7318 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2180, Invalid=17280, Unknown=0, NotChecked=0, Total=19460 [2018-09-18 11:28:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33202 states. [2018-09-18 11:28:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33202 to 31092. [2018-09-18 11:28:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31092 states. [2018-09-18 11:28:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31092 states to 31092 states and 41332 transitions. [2018-09-18 11:28:07,498 INFO L78 Accepts]: Start accepts. Automaton has 31092 states and 41332 transitions. Word has length 360 [2018-09-18 11:28:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:28:07,499 INFO L480 AbstractCegarLoop]: Abstraction has 31092 states and 41332 transitions. [2018-09-18 11:28:07,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-18 11:28:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31092 states and 41332 transitions. [2018-09-18 11:28:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-09-18 11:28:07,511 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:28:07,512 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:28:07,512 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:28:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1914137172, now seen corresponding path program 1 times [2018-09-18 11:28:07,513 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:28:07,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:28:07,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:28:07,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:28:07,514 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:28:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:28:08,065 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-18 11:28:08,302 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-09-18 11:28:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 306 proven. 48 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-09-18 11:28:09,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:28:09,160 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:28:09,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:28:09,170 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:28:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:28:09,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:28:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-18 11:28:09,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:28:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-18 11:28:09,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:28:09,895 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:28:09,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:28:09,911 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:28:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:28:10,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:28:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 353 proven. 6 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-18 11:28:10,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:28:10,399 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 11:28:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-18 11:28:10,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:28:10,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 19 [2018-09-18 11:28:10,825 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:28:10,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-18 11:28:10,827 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-18 11:28:10,827 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-09-18 11:28:10,827 INFO L87 Difference]: Start difference. First operand 31092 states and 41332 transitions. Second operand 17 states. [2018-09-18 11:28:13,258 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-09-18 11:28:13,972 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2018-09-18 11:28:16,154 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-09-18 11:28:18,058 WARN L178 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-09-18 11:28:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:28:20,283 INFO L93 Difference]: Finished difference Result 59881 states and 78728 transitions. [2018-09-18 11:28:20,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-18 11:28:20,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 390 [2018-09-18 11:28:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:28:20,347 INFO L225 Difference]: With dead ends: 59881 [2018-09-18 11:28:20,347 INFO L226 Difference]: Without dead ends: 25182 [2018-09-18 11:28:20,439 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1650 GetRequests, 1591 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2018-09-18 11:28:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25182 states. [2018-09-18 11:28:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25182 to 22229. [2018-09-18 11:28:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22229 states. [2018-09-18 11:28:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22229 states to 22229 states and 25420 transitions. [2018-09-18 11:28:20,907 INFO L78 Accepts]: Start accepts. Automaton has 22229 states and 25420 transitions. Word has length 390 [2018-09-18 11:28:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:28:20,908 INFO L480 AbstractCegarLoop]: Abstraction has 22229 states and 25420 transitions. [2018-09-18 11:28:20,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-18 11:28:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22229 states and 25420 transitions. [2018-09-18 11:28:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-09-18 11:28:20,921 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:28:20,921 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:28:20,922 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:28:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1143366859, now seen corresponding path program 1 times [2018-09-18 11:28:20,922 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:28:20,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:28:20,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:28:20,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:28:20,923 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:28:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:28:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 156 proven. 232 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-18 11:28:21,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:28:21,483 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:28:21,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:28:21,492 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:28:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:28:21,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:28:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-18 11:28:24,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:28:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 261 proven. 107 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-18 11:28:24,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:28:24,468 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:28:24,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:28:24,485 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:28:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:28:24,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:28:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-18 11:28:27,049 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:28:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 261 proven. 107 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-18 11:28:27,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:28:27,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5, 8, 5] total 15 [2018-09-18 11:28:27,819 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:28:27,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 11:28:27,821 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 11:28:27,821 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=150, Unknown=3, NotChecked=0, Total=210 [2018-09-18 11:28:27,821 INFO L87 Difference]: Start difference. First operand 22229 states and 25420 transitions. Second operand 10 states. Received shutdown request... [2018-09-18 11:29:54,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-18 11:29:54,903 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:29:54,910 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:29:54,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:29:54 BoogieIcfgContainer [2018-09-18 11:29:54,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:29:54,912 INFO L168 Benchmark]: Toolchain (without parser) took 243622.91 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 827.4 MB. Max. memory is 7.1 GB. [2018-09-18 11:29:54,913 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 11:29:54,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 958.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:29:54,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 155.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:29:54,915 INFO L168 Benchmark]: Boogie Preprocessor took 345.31 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -941.0 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2018-09-18 11:29:54,916 INFO L168 Benchmark]: RCFGBuilder took 4481.65 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 181.1 MB). Peak memory consumption was 181.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:29:54,916 INFO L168 Benchmark]: TraceAbstraction took 237674.23 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 3.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 675.8 MB. Max. memory is 7.1 GB. [2018-09-18 11:29:54,921 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 958.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 155.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 345.31 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -941.0 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4481.65 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 181.1 MB). Peak memory consumption was 181.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237674.23 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 3.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 675.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 156]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 156). Cancelled while BasicCegarLoop was constructing difference of abstraction (22229states) and FLOYD_HOARE automaton (currently 23 states, 10 states before enhancement), while ReachableStatesComputation was computing reachable states (41769 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 237.5s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 197.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2393 SDtfs, 36020 SDslu, 5191 SDs, 0 SdLazy, 57054 SolverSat, 12147 SolverUnsat, 51 SolverUnknown, 0 SolverNotchecked, 146.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12481 GetRequests, 11979 SyntacticMatches, 32 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12180 ImplicationChecksByTransitivity, 40.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32400occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 17257 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 26.1s InterpolantComputationTime, 9539 NumberOfCodeBlocks, 9539 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 15380 ConstructedInterpolants, 3 QuantifiedInterpolants, 25499815 SizeOfPredicates, 27 NumberOfNonLiveVariables, 9899 ConjunctsInSsa, 149 ConjunctsInUnsatCore, 47 InterpolantComputations, 5 PerfectInterpolantSequences, 14224/15754 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-29-54-934.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-29-54-934.csv Completed graceful shutdown