java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:10:26,590 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:10:26,592 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:10:26,603 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:10:26,604 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:10:26,605 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:10:26,606 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:10:26,608 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:10:26,609 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:10:26,610 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:10:26,611 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:10:26,611 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:10:26,612 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:10:26,613 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:10:26,614 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:10:26,615 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:10:26,616 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:10:26,618 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:10:26,623 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:10:26,627 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:10:26,629 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:10:26,630 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:10:26,633 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:10:26,634 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:10:26,634 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:10:26,635 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:10:26,636 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:10:26,637 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:10:26,637 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:10:26,638 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:10:26,639 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:10:26,639 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:10:26,639 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:10:26,640 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:10:26,641 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:10:26,641 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:10:26,642 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 10:10:26,657 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:10:26,657 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:10:26,658 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:10:26,658 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:10:26,658 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:10:26,658 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:10:26,658 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:10:26,659 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:10:26,659 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:10:26,659 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:10:26,659 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:10:26,659 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:10:26,660 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:10:26,660 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:10:26,660 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:10:26,661 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:10:26,661 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:10:26,661 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:10:26,661 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:10:26,661 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:10:26,662 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:10:26,662 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:10:26,662 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:10:26,662 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:10:26,662 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:10:26,663 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:10:26,663 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:10:26,663 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:10:26,663 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:10:26,663 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:10:26,664 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:10:26,664 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:10:26,664 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:10:26,664 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:10:26,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:10:26,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:10:26,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:10:26,742 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:10:26,742 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:10:26,743 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c [2018-09-18 10:10:27,108 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02eb0f42/223565a2dc6b486c8f818a418d19f0a4/FLAGac108f458 [2018-09-18 10:10:27,463 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:10:27,464 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c [2018-09-18 10:10:27,487 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02eb0f42/223565a2dc6b486c8f818a418d19f0a4/FLAGac108f458 [2018-09-18 10:10:27,508 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02eb0f42/223565a2dc6b486c8f818a418d19f0a4 [2018-09-18 10:10:27,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:10:27,523 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:10:27,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:10:27,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:10:27,532 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:10:27,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:10:27" (1/1) ... [2018-09-18 10:10:27,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c5c827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:27, skipping insertion in model container [2018-09-18 10:10:27,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:10:27" (1/1) ... [2018-09-18 10:10:27,550 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:10:28,283 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:10:28,303 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:10:28,543 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:10:28,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28 WrapperNode [2018-09-18 10:10:28,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:10:28,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:10:28,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:10:28,608 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:10:28,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:28,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:28,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:10:28,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:10:28,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:10:28,776 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:10:29,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (1/1) ... [2018-09-18 10:10:29,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:10:29,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:10:29,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:10:29,200 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:10:29,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (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 10:10:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:10:29,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:10:29,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:10:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:10:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:10:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:10:29,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:10:29,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:10:34,980 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:10:34,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:10:34 BoogieIcfgContainer [2018-09-18 10:10:34,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:10:34,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:10:34,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:10:34,985 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:10:34,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:10:27" (1/3) ... [2018-09-18 10:10:34,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c40a4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:10:34, skipping insertion in model container [2018-09-18 10:10:34,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:10:28" (2/3) ... [2018-09-18 10:10:34,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c40a4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:10:34, skipping insertion in model container [2018-09-18 10:10:34,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:10:34" (3/3) ... [2018-09-18 10:10:34,990 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07_true-unreach-call.c [2018-09-18 10:10:35,001 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:10:35,011 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:10:35,063 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:10:35,064 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:10:35,064 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:10:35,064 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:10:35,064 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:10:35,064 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:10:35,065 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:10:35,065 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:10:35,065 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:10:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:10:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-18 10:10:35,126 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:35,130 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:35,132 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -98541652, now seen corresponding path program 1 times [2018-09-18 10:10:35,141 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:35,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:35,188 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:36,099 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:10:36,299 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 10:10:36,302 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:36,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:10:36,302 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:36,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:36,326 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:36,326 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:36,329 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-18 10:10:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:38,643 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-09-18 10:10:38,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:38,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2018-09-18 10:10:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:38,670 INFO L225 Difference]: With dead ends: 845 [2018-09-18 10:10:38,670 INFO L226 Difference]: Without dead ends: 531 [2018-09-18 10:10:38,678 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-18 10:10:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-09-18 10:10:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-09-18 10:10:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-09-18 10:10:38,769 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 179 [2018-09-18 10:10:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:38,771 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-09-18 10:10:38,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-09-18 10:10:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-18 10:10:38,784 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:38,784 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:38,784 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2053173019, now seen corresponding path program 1 times [2018-09-18 10:10:38,785 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:38,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:38,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:38,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:38,789 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:39,137 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:10:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:39,481 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:39,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:10:39,482 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:39,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:10:39,485 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:10:39,485 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:10:39,486 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-09-18 10:10:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:43,086 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-09-18 10:10:43,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:10:43,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 189 [2018-09-18 10:10:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:43,098 INFO L225 Difference]: With dead ends: 1599 [2018-09-18 10:10:43,098 INFO L226 Difference]: Without dead ends: 1075 [2018-09-18 10:10:43,104 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:10:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-09-18 10:10:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-09-18 10:10:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-09-18 10:10:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-09-18 10:10:43,175 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 189 [2018-09-18 10:10:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:43,175 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-09-18 10:10:43,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:10:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-09-18 10:10:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-18 10:10:43,181 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:43,181 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:43,182 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1275531176, now seen corresponding path program 1 times [2018-09-18 10:10:43,182 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:43,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:43,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:43,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:43,184 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:43,475 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:43,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:10:43,476 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:43,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:43,477 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:43,477 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:43,477 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-09-18 10:10:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:46,019 INFO L93 Difference]: Finished difference Result 2912 states and 4936 transitions. [2018-09-18 10:10:46,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:46,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2018-09-18 10:10:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:46,043 INFO L225 Difference]: With dead ends: 2912 [2018-09-18 10:10:46,043 INFO L226 Difference]: Without dead ends: 1884 [2018-09-18 10:10:46,048 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:10:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-18 10:10:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1881. [2018-09-18 10:10:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2018-09-18 10:10:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2981 transitions. [2018-09-18 10:10:46,140 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2981 transitions. Word has length 192 [2018-09-18 10:10:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:46,141 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2981 transitions. [2018-09-18 10:10:46,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2981 transitions. [2018-09-18 10:10:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-18 10:10:46,149 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:46,149 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:46,149 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash -793960044, now seen corresponding path program 1 times [2018-09-18 10:10:46,150 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:46,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:46,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:46,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:46,151 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:46,455 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:46,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-18 10:10:46,455 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:46,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:10:46,456 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:10:46,456 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:10:46,457 INFO L87 Difference]: Start difference. First operand 1881 states and 2981 transitions. Second operand 7 states. [2018-09-18 10:10:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:48,890 INFO L93 Difference]: Finished difference Result 5729 states and 9791 transitions. [2018-09-18 10:10:48,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:10:48,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 198 [2018-09-18 10:10:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:48,923 INFO L225 Difference]: With dead ends: 5729 [2018-09-18 10:10:48,923 INFO L226 Difference]: Without dead ends: 3854 [2018-09-18 10:10:48,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:10:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2018-09-18 10:10:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3744. [2018-09-18 10:10:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2018-09-18 10:10:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 6108 transitions. [2018-09-18 10:10:49,134 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 6108 transitions. Word has length 198 [2018-09-18 10:10:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:49,134 INFO L480 AbstractCegarLoop]: Abstraction has 3744 states and 6108 transitions. [2018-09-18 10:10:49,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:10:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 6108 transitions. [2018-09-18 10:10:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-09-18 10:10:49,147 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:49,147 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:49,148 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash -460153767, now seen corresponding path program 1 times [2018-09-18 10:10:49,148 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:49,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:49,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:49,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:49,149 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:49,372 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:10:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:49,407 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:10:49,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:10:49,407 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:49,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:10:49,408 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:10:49,408 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:10:49,408 INFO L87 Difference]: Start difference. First operand 3744 states and 6108 transitions. Second operand 6 states. [2018-09-18 10:10:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:51,517 INFO L93 Difference]: Finished difference Result 8125 states and 13602 transitions. [2018-09-18 10:10:51,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:10:51,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 199 [2018-09-18 10:10:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:51,542 INFO L225 Difference]: With dead ends: 8125 [2018-09-18 10:10:51,543 INFO L226 Difference]: Without dead ends: 4387 [2018-09-18 10:10:51,559 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 10:10:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2018-09-18 10:10:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4215. [2018-09-18 10:10:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2018-09-18 10:10:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6296 transitions. [2018-09-18 10:10:51,683 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6296 transitions. Word has length 199 [2018-09-18 10:10:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:51,684 INFO L480 AbstractCegarLoop]: Abstraction has 4215 states and 6296 transitions. [2018-09-18 10:10:51,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:10:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6296 transitions. [2018-09-18 10:10:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-18 10:10:51,695 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:51,696 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:51,696 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1629605729, now seen corresponding path program 1 times [2018-09-18 10:10:51,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:51,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:51,698 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:51,969 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:10:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:52,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:52,142 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 10:10:52,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:52,159 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:52,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:10:52,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:10:52,870 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:10:52,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-09-18 10:10:52,870 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:52,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:52,871 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:52,871 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:10:52,872 INFO L87 Difference]: Start difference. First operand 4215 states and 6296 transitions. Second operand 3 states. [2018-09-18 10:10:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:53,704 INFO L93 Difference]: Finished difference Result 8422 states and 12588 transitions. [2018-09-18 10:10:53,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:53,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-09-18 10:10:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:53,724 INFO L225 Difference]: With dead ends: 8422 [2018-09-18 10:10:53,724 INFO L226 Difference]: Without dead ends: 4213 [2018-09-18 10:10:53,734 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:10:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2018-09-18 10:10:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4213. [2018-09-18 10:10:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4213 states. [2018-09-18 10:10:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 6292 transitions. [2018-09-18 10:10:53,843 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 6292 transitions. Word has length 203 [2018-09-18 10:10:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:53,843 INFO L480 AbstractCegarLoop]: Abstraction has 4213 states and 6292 transitions. [2018-09-18 10:10:53,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 6292 transitions. [2018-09-18 10:10:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-18 10:10:53,855 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:53,856 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:53,856 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:53,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1141340529, now seen corresponding path program 1 times [2018-09-18 10:10:53,857 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:53,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:53,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:53,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:53,858 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:54,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:54,346 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 10:10:54,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:54,361 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:54,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:10:54,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:10:55,215 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:10:55,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:10:55,215 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:10:55,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:10:55,216 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:10:55,216 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:10:55,217 INFO L87 Difference]: Start difference. First operand 4213 states and 6292 transitions. Second operand 3 states. [2018-09-18 10:10:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:10:57,427 INFO L93 Difference]: Finished difference Result 12317 states and 18981 transitions. [2018-09-18 10:10:57,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:10:57,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-09-18 10:10:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:10:57,475 INFO L225 Difference]: With dead ends: 12317 [2018-09-18 10:10:57,475 INFO L226 Difference]: Without dead ends: 8110 [2018-09-18 10:10:57,489 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:10:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2018-09-18 10:10:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 7965. [2018-09-18 10:10:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2018-09-18 10:10:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12011 transitions. [2018-09-18 10:10:57,725 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12011 transitions. Word has length 210 [2018-09-18 10:10:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:10:57,725 INFO L480 AbstractCegarLoop]: Abstraction has 7965 states and 12011 transitions. [2018-09-18 10:10:57,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:10:57,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12011 transitions. [2018-09-18 10:10:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-18 10:10:57,748 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:10:57,748 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:10:57,748 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:10:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1037923925, now seen corresponding path program 1 times [2018-09-18 10:10:57,749 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:10:57,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:57,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:57,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:10:57,750 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:10:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:58,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:58,165 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:10:58,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:58,172 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:58,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:58,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:10:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:59,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:10:59,139 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 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:10:59,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:10:59,156 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:10:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:10:59,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:10:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:10:59,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:00,093 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 10:11:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:00,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:11:00,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 18 [2018-09-18 10:11:00,333 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:11:00,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:11:00,334 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:11:00,334 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:11:00,337 INFO L87 Difference]: Start difference. First operand 7965 states and 12011 transitions. Second operand 9 states. [2018-09-18 10:11:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:14,132 INFO L93 Difference]: Finished difference Result 66058 states and 136488 transitions. [2018-09-18 10:11:14,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-18 10:11:14,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2018-09-18 10:11:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:14,550 INFO L225 Difference]: With dead ends: 66058 [2018-09-18 10:11:14,550 INFO L226 Difference]: Without dead ends: 58099 [2018-09-18 10:11:14,705 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 864 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2018-09-18 10:11:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58099 states. [2018-09-18 10:11:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58099 to 55162. [2018-09-18 10:11:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55162 states. [2018-09-18 10:11:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55162 states to 55162 states and 79096 transitions. [2018-09-18 10:11:17,381 INFO L78 Accepts]: Start accepts. Automaton has 55162 states and 79096 transitions. Word has length 212 [2018-09-18 10:11:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:17,382 INFO L480 AbstractCegarLoop]: Abstraction has 55162 states and 79096 transitions. [2018-09-18 10:11:17,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:11:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 55162 states and 79096 transitions. [2018-09-18 10:11:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-18 10:11:17,491 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:17,491 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:17,492 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:17,492 INFO L82 PathProgramCache]: Analyzing trace with hash 874437380, now seen corresponding path program 1 times [2018-09-18 10:11:17,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:17,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:17,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:17,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:17,493 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:17,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:17,918 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:17,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:17,926 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:18,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:18,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:18,327 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:18,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-18 10:11:18,328 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:18,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:11:18,328 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:11:18,329 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:11:18,329 INFO L87 Difference]: Start difference. First operand 55162 states and 79096 transitions. Second operand 3 states. [2018-09-18 10:11:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:20,215 INFO L93 Difference]: Finished difference Result 107758 states and 153453 transitions. [2018-09-18 10:11:20,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:11:20,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2018-09-18 10:11:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:20,522 INFO L225 Difference]: With dead ends: 107758 [2018-09-18 10:11:20,523 INFO L226 Difference]: Without dead ends: 65980 [2018-09-18 10:11:20,622 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:11:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65980 states. [2018-09-18 10:11:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65980 to 64455. [2018-09-18 10:11:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64455 states. [2018-09-18 10:11:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64455 states to 64455 states and 91904 transitions. [2018-09-18 10:11:22,680 INFO L78 Accepts]: Start accepts. Automaton has 64455 states and 91904 transitions. Word has length 217 [2018-09-18 10:11:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:22,681 INFO L480 AbstractCegarLoop]: Abstraction has 64455 states and 91904 transitions. [2018-09-18 10:11:22,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:11:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64455 states and 91904 transitions. [2018-09-18 10:11:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-18 10:11:22,777 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:22,777 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:22,777 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1937547137, now seen corresponding path program 1 times [2018-09-18 10:11:22,778 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:22,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:22,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:22,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:22,779 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:23,089 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:11:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:23,516 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:11:23,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:11:23,517 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:23,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:11:23,518 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:11:23,518 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:11:23,518 INFO L87 Difference]: Start difference. First operand 64455 states and 91904 transitions. Second operand 6 states. [2018-09-18 10:11:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:26,599 INFO L93 Difference]: Finished difference Result 126056 states and 182154 transitions. [2018-09-18 10:11:26,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:11:26,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 243 [2018-09-18 10:11:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:26,812 INFO L225 Difference]: With dead ends: 126056 [2018-09-18 10:11:26,812 INFO L226 Difference]: Without dead ends: 61642 [2018-09-18 10:11:27,740 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:11:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61642 states. [2018-09-18 10:11:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61642 to 60920. [2018-09-18 10:11:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60920 states. [2018-09-18 10:11:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60920 states to 60920 states and 79562 transitions. [2018-09-18 10:11:29,073 INFO L78 Accepts]: Start accepts. Automaton has 60920 states and 79562 transitions. Word has length 243 [2018-09-18 10:11:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:29,073 INFO L480 AbstractCegarLoop]: Abstraction has 60920 states and 79562 transitions. [2018-09-18 10:11:29,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:11:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60920 states and 79562 transitions. [2018-09-18 10:11:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-18 10:11:29,129 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:29,129 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:29,130 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:29,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1140594647, now seen corresponding path program 1 times [2018-09-18 10:11:29,130 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:29,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:29,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:29,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:29,131 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 10:11:29,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:29,642 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 10:11:29,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:29,656 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:29,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:30,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:30,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:30,722 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 10:11:30,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:30,741 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:31,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:31,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:31,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:11:31,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-18 10:11:31,387 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:11:31,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:11:31,388 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:11:31,388 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:11:31,389 INFO L87 Difference]: Start difference. First operand 60920 states and 79562 transitions. Second operand 9 states. [2018-09-18 10:11:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:37,416 INFO L93 Difference]: Finished difference Result 236517 states and 325555 transitions. [2018-09-18 10:11:37,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:11:37,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2018-09-18 10:11:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:38,023 INFO L225 Difference]: With dead ends: 236517 [2018-09-18 10:11:38,023 INFO L226 Difference]: Without dead ends: 175673 [2018-09-18 10:11:38,171 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 977 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-18 10:11:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175673 states. [2018-09-18 10:11:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175673 to 174433. [2018-09-18 10:11:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174433 states. [2018-09-18 10:11:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174433 states to 174433 states and 226147 transitions. [2018-09-18 10:11:42,581 INFO L78 Accepts]: Start accepts. Automaton has 174433 states and 226147 transitions. Word has length 246 [2018-09-18 10:11:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:42,582 INFO L480 AbstractCegarLoop]: Abstraction has 174433 states and 226147 transitions. [2018-09-18 10:11:42,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:11:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 174433 states and 226147 transitions. [2018-09-18 10:11:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-18 10:11:42,659 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:42,659 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:42,660 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1067592758, now seen corresponding path program 1 times [2018-09-18 10:11:42,660 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:42,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:42,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:42,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:42,661 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:43,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:43,146 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 10:11:44,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:44,445 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:44,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:44,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:11:44,762 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:44,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:11:44,763 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:44,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:11:44,764 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:11:44,764 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:44,764 INFO L87 Difference]: Start difference. First operand 174433 states and 226147 transitions. Second operand 3 states. [2018-09-18 10:11:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:47,531 INFO L93 Difference]: Finished difference Result 298333 states and 389262 transitions. [2018-09-18 10:11:47,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:11:47,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2018-09-18 10:11:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:11:48,043 INFO L225 Difference]: With dead ends: 298333 [2018-09-18 10:11:48,043 INFO L226 Difference]: Without dead ends: 152992 [2018-09-18 10:11:48,264 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 500 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152992 states. [2018-09-18 10:11:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152992 to 143492. [2018-09-18 10:11:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143492 states. [2018-09-18 10:11:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143492 states to 143492 states and 179586 transitions. [2018-09-18 10:11:51,533 INFO L78 Accepts]: Start accepts. Automaton has 143492 states and 179586 transitions. Word has length 251 [2018-09-18 10:11:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:11:51,533 INFO L480 AbstractCegarLoop]: Abstraction has 143492 states and 179586 transitions. [2018-09-18 10:11:51,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:11:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 143492 states and 179586 transitions. [2018-09-18 10:11:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-09-18 10:11:51,638 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:11:51,638 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:11:51,638 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:11:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1011944805, now seen corresponding path program 1 times [2018-09-18 10:11:51,639 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:11:51,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:51,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:51,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:11:51,640 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:11:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:11:52,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:11:52,231 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:11:56,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:11:56,519 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:11:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:11:56,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:11:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-18 10:11:56,914 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:11:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-18 10:11:57,467 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:11:57,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:11:57,467 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:11:57,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:11:57,468 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:11:57,468 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:11:57,469 INFO L87 Difference]: Start difference. First operand 143492 states and 179586 transitions. Second operand 3 states. [2018-09-18 10:11:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:11:59,895 INFO L93 Difference]: Finished difference Result 240130 states and 298374 transitions. [2018-09-18 10:11:59,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:11:59,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2018-09-18 10:11:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:00,228 INFO L225 Difference]: With dead ends: 240130 [2018-09-18 10:12:00,228 INFO L226 Difference]: Without dead ends: 133383 [2018-09-18 10:12:00,726 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 632 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:12:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133383 states. [2018-09-18 10:12:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133383 to 130535. [2018-09-18 10:12:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130535 states. [2018-09-18 10:12:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130535 states to 130535 states and 163805 transitions. [2018-09-18 10:12:03,385 INFO L78 Accepts]: Start accepts. Automaton has 130535 states and 163805 transitions. Word has length 317 [2018-09-18 10:12:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:03,386 INFO L480 AbstractCegarLoop]: Abstraction has 130535 states and 163805 transitions. [2018-09-18 10:12:03,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:12:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 130535 states and 163805 transitions. [2018-09-18 10:12:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-18 10:12:03,518 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:03,518 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:12:03,519 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1576646578, now seen corresponding path program 1 times [2018-09-18 10:12:03,519 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:03,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:03,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:03,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:03,520 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:04,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:04,150 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 10:12:04,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:04,166 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:04,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:04,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:12:04,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:04,575 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 10:12:04,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:04,592 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:05,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:12:05,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:12:05,778 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-09-18 10:12:05,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 12 [2018-09-18 10:12:05,779 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:12:05,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:12:05,780 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:12:05,780 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:12:05,780 INFO L87 Difference]: Start difference. First operand 130535 states and 163805 transitions. Second operand 5 states. [2018-09-18 10:12:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:09,905 INFO L93 Difference]: Finished difference Result 277115 states and 357201 transitions. [2018-09-18 10:12:09,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:12:09,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2018-09-18 10:12:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:10,347 INFO L225 Difference]: With dead ends: 277115 [2018-09-18 10:12:10,347 INFO L226 Difference]: Without dead ends: 146691 [2018-09-18 10:12:10,542 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1304 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:12:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146691 states. [2018-09-18 10:12:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146691 to 141184. [2018-09-18 10:12:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141184 states. [2018-09-18 10:12:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141184 states to 141184 states and 175431 transitions. [2018-09-18 10:12:13,353 INFO L78 Accepts]: Start accepts. Automaton has 141184 states and 175431 transitions. Word has length 328 [2018-09-18 10:12:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:13,353 INFO L480 AbstractCegarLoop]: Abstraction has 141184 states and 175431 transitions. [2018-09-18 10:12:13,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:12:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 141184 states and 175431 transitions. [2018-09-18 10:12:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-18 10:12:13,487 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:13,487 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:12:13,487 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:13,487 INFO L82 PathProgramCache]: Analyzing trace with hash 155426270, now seen corresponding path program 1 times [2018-09-18 10:12:13,488 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:13,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:13,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:13,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:13,488 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 178 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 10:12:14,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:14,652 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 10:12:14,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:14,661 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:14,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-18 10:12:15,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-18 10:12:15,761 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:12:15,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 10 [2018-09-18 10:12:15,761 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:12:15,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:12:15,762 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:12:15,762 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:12:15,762 INFO L87 Difference]: Start difference. First operand 141184 states and 175431 transitions. Second operand 5 states. [2018-09-18 10:12:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:19,934 INFO L93 Difference]: Finished difference Result 271984 states and 336905 transitions. [2018-09-18 10:12:19,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:12:19,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 348 [2018-09-18 10:12:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:20,374 INFO L225 Difference]: With dead ends: 271984 [2018-09-18 10:12:20,374 INFO L226 Difference]: Without dead ends: 179535 [2018-09-18 10:12:20,455 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 687 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:12:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179535 states. [2018-09-18 10:12:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179535 to 173454. [2018-09-18 10:12:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173454 states. [2018-09-18 10:12:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173454 states to 173454 states and 216878 transitions. [2018-09-18 10:12:23,555 INFO L78 Accepts]: Start accepts. Automaton has 173454 states and 216878 transitions. Word has length 348 [2018-09-18 10:12:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:23,555 INFO L480 AbstractCegarLoop]: Abstraction has 173454 states and 216878 transitions. [2018-09-18 10:12:23,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:12:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 173454 states and 216878 transitions. [2018-09-18 10:12:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-18 10:12:23,729 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:23,730 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:12:23,730 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 584790789, now seen corresponding path program 1 times [2018-09-18 10:12:23,730 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:23,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:23,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:23,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:23,731 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 195 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-09-18 10:12:24,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:24,015 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:24,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:24,024 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:24,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-18 10:12:24,391 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 172 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-18 10:12:24,639 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:12:24,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-18 10:12:24,639 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:12:24,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:12:24,640 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:12:24,640 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:12:24,641 INFO L87 Difference]: Start difference. First operand 173454 states and 216878 transitions. Second operand 6 states. [2018-09-18 10:12:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:29,270 INFO L93 Difference]: Finished difference Result 355868 states and 443863 transitions. [2018-09-18 10:12:29,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:12:29,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 362 [2018-09-18 10:12:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:29,820 INFO L225 Difference]: With dead ends: 355868 [2018-09-18 10:12:29,820 INFO L226 Difference]: Without dead ends: 180576 [2018-09-18 10:12:30,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 716 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:12:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180576 states. [2018-09-18 10:12:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180576 to 176250. [2018-09-18 10:12:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176250 states. [2018-09-18 10:12:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176250 states to 176250 states and 219107 transitions. [2018-09-18 10:12:34,155 INFO L78 Accepts]: Start accepts. Automaton has 176250 states and 219107 transitions. Word has length 362 [2018-09-18 10:12:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:34,156 INFO L480 AbstractCegarLoop]: Abstraction has 176250 states and 219107 transitions. [2018-09-18 10:12:34,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:12:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 176250 states and 219107 transitions. [2018-09-18 10:12:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-09-18 10:12:34,398 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:34,398 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:34,398 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:34,399 INFO L82 PathProgramCache]: Analyzing trace with hash 528736920, now seen corresponding path program 1 times [2018-09-18 10:12:34,399 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:34,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:34,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:34,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:34,400 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 176 proven. 90 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-18 10:12:35,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:35,043 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 10:12:35,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:35,052 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:36,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-18 10:12:36,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 176 proven. 90 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-18 10:12:36,486 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:12:36,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:12:36,486 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:12:36,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:12:36,487 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:12:36,487 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:12:36,488 INFO L87 Difference]: Start difference. First operand 176250 states and 219107 transitions. Second operand 5 states. [2018-09-18 10:12:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:45,235 INFO L93 Difference]: Finished difference Result 413471 states and 515201 transitions. [2018-09-18 10:12:45,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:12:45,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 364 [2018-09-18 10:12:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:45,701 INFO L225 Difference]: With dead ends: 413471 [2018-09-18 10:12:45,701 INFO L226 Difference]: Without dead ends: 237247 [2018-09-18 10:12:45,845 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 723 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:12:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237247 states. [2018-09-18 10:12:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237247 to 216367. [2018-09-18 10:12:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216367 states. [2018-09-18 10:12:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216367 states to 216367 states and 269288 transitions. [2018-09-18 10:12:49,295 INFO L78 Accepts]: Start accepts. Automaton has 216367 states and 269288 transitions. Word has length 364 [2018-09-18 10:12:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:12:49,295 INFO L480 AbstractCegarLoop]: Abstraction has 216367 states and 269288 transitions. [2018-09-18 10:12:49,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:12:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 216367 states and 269288 transitions. [2018-09-18 10:12:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-09-18 10:12:49,483 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:12:49,483 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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:49,484 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:12:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash 450971707, now seen corresponding path program 1 times [2018-09-18 10:12:49,484 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:12:49,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:49,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:49,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:12:49,485 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:12:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 232 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-18 10:12:49,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:49,882 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:12:49,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:49,889 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:50,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 258 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-18 10:12:50,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 232 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-18 10:12:50,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:12:50,312 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:12:50,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:12:50,953 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:12:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:12:51,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:12:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 258 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-18 10:12:51,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:12:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 232 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-18 10:12:51,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:12:51,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-09-18 10:12:51,699 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:12:51,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:12:51,700 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:12:51,700 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:12:51,700 INFO L87 Difference]: Start difference. First operand 216367 states and 269288 transitions. Second operand 6 states. [2018-09-18 10:12:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:12:58,254 INFO L93 Difference]: Finished difference Result 407561 states and 525520 transitions. [2018-09-18 10:12:58,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:12:58,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 365 [2018-09-18 10:12:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:12:58,813 INFO L225 Difference]: With dead ends: 407561 [2018-09-18 10:12:58,813 INFO L226 Difference]: Without dead ends: 193779 [2018-09-18 10:12:59,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 1458 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:12:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193779 states. [2018-09-18 10:13:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193779 to 176624. [2018-09-18 10:13:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176624 states. [2018-09-18 10:13:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176624 states to 176624 states and 211531 transitions. [2018-09-18 10:13:02,832 INFO L78 Accepts]: Start accepts. Automaton has 176624 states and 211531 transitions. Word has length 365 [2018-09-18 10:13:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:02,833 INFO L480 AbstractCegarLoop]: Abstraction has 176624 states and 211531 transitions. [2018-09-18 10:13:02,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:13:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 176624 states and 211531 transitions. [2018-09-18 10:13:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-18 10:13:02,993 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:02,993 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:13:02,993 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1185382395, now seen corresponding path program 1 times [2018-09-18 10:13:02,994 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:02,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:02,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:02,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:02,995 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 199 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:13:03,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:03,776 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:13:03,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:03,785 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:04,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 264 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:13:04,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 203 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-18 10:13:05,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:05,564 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:13:05,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:05,580 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:06,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 194 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-18 10:13:06,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 202 proven. 14 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-18 10:13:07,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:13:07,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 8, 8] total 28 [2018-09-18 10:13:07,302 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:13:07,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 10:13:07,303 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 10:13:07,303 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2018-09-18 10:13:07,304 INFO L87 Difference]: Start difference. First operand 176624 states and 211531 transitions. Second operand 18 states. [2018-09-18 10:13:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:13:32,240 INFO L93 Difference]: Finished difference Result 560804 states and 689727 transitions. [2018-09-18 10:13:32,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-18 10:13:32,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 380 [2018-09-18 10:13:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:13:33,410 INFO L225 Difference]: With dead ends: 560804 [2018-09-18 10:13:33,411 INFO L226 Difference]: Without dead ends: 388919 [2018-09-18 10:13:33,672 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1633 GetRequests, 1500 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5761 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2614, Invalid=13642, Unknown=0, NotChecked=0, Total=16256 [2018-09-18 10:13:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388919 states. [2018-09-18 10:13:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388919 to 375271. [2018-09-18 10:13:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375271 states. [2018-09-18 10:13:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375271 states to 375271 states and 453755 transitions. [2018-09-18 10:13:42,241 INFO L78 Accepts]: Start accepts. Automaton has 375271 states and 453755 transitions. Word has length 380 [2018-09-18 10:13:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:13:42,242 INFO L480 AbstractCegarLoop]: Abstraction has 375271 states and 453755 transitions. [2018-09-18 10:13:42,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 10:13:42,242 INFO L276 IsEmpty]: Start isEmpty. Operand 375271 states and 453755 transitions. [2018-09-18 10:13:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-09-18 10:13:42,551 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:13:42,551 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:13:42,551 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:13:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash -217036829, now seen corresponding path program 1 times [2018-09-18 10:13:42,552 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:13:42,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:42,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:42,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:13:42,553 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:13:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 195 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-18 10:13:43,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:13:43,134 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:13:43,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:13:43,144 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:13:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:13:43,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:13:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-18 10:13:43,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:13:44,029 WARN L178 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2018-09-18 10:13:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 195 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-18 10:13:44,517 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:13:44,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:13:44,517 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:13:44,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:13:44,518 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:13:44,518 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:13:44,518 INFO L87 Difference]: Start difference. First operand 375271 states and 453755 transitions. Second operand 5 states. Received shutdown request... [2018-09-18 10:13:57,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:13:57,264 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:13:57,268 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:13:57,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:13:57 BoogieIcfgContainer [2018-09-18 10:13:57,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:13:57,270 INFO L168 Benchmark]: Toolchain (without parser) took 209748.84 ms. Allocated memory was 1.5 GB in the beginning and 5.9 GB in the end (delta: 4.4 GB). Free memory was 1.4 GB in the beginning and 4.7 GB in the end (delta: -3.3 GB). Peak memory consumption was 4.7 GB. Max. memory is 7.1 GB. [2018-09-18 10:13:57,271 INFO L168 Benchmark]: CDTParser took 0.44 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 10:13:57,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1082.25 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:57,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 167.64 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:57,273 INFO L168 Benchmark]: Boogie Preprocessor took 422.31 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 848.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -981.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:57,273 INFO L168 Benchmark]: RCFGBuilder took 5782.65 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 273.4 MB). Peak memory consumption was 273.4 MB. Max. memory is 7.1 GB. [2018-09-18 10:13:57,274 INFO L168 Benchmark]: TraceAbstraction took 202287.32 ms. Allocated memory was 2.4 GB in the beginning and 5.9 GB in the end (delta: 3.5 GB). Free memory was 2.0 GB in the beginning and 4.7 GB in the end (delta: -2.7 GB). Peak memory consumption was 4.5 GB. Max. memory is 7.1 GB. [2018-09-18 10:13:57,278 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 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 1082.25 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 167.64 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 422.31 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 848.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -981.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5782.65 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 273.4 MB). Peak memory consumption was 273.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202287.32 ms. Allocated memory was 2.4 GB in the beginning and 5.9 GB in the end (delta: 3.5 GB). Free memory was 2.0 GB in the beginning and 4.7 GB in the end (delta: -2.7 GB). Peak memory consumption was 4.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1551]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1551). Cancelled while BasicCegarLoop was constructing difference of abstraction (375271states) and FLOYD_HOARE automaton (currently 8 states, 5 states before enhancement), while ReachableStatesComputation was computing reachable states (593821 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 202.2s OverallTime, 20 OverallIterations, 4 TraceHistogramMax, 121.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4175 SDtfs, 23711 SDslu, 4912 SDs, 0 SdLazy, 44046 SolverSat, 6058 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11746 GetRequests, 11392 SyntacticMatches, 41 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6499 ImplicationChecksByTransitivity, 14.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=375271occurred in iteration=19, 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: 43.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 86841 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 11103 NumberOfCodeBlocks, 11103 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 16762 ConstructedInterpolants, 0 QuantifiedInterpolants, 17949850 SizeOfPredicates, 81 NumberOfNonLiveVariables, 22873 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 58 InterpolantComputations, 23 PerfectInterpolantSequences, 8186/9008 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/Problem03_label07_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-13-57-292.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label07_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-13-57-292.csv Completed graceful shutdown