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/Problem14_label53_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:41:27,741 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:41:27,745 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:41:27,763 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:41:27,763 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:41:27,764 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:41:27,765 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:41:27,767 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:41:27,769 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:41:27,770 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:41:27,771 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:41:27,771 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:41:27,772 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:41:27,773 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:41:27,774 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:41:27,775 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:41:27,776 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:41:27,778 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:41:27,780 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:41:27,781 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:41:27,782 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:41:27,783 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:41:27,786 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:41:27,786 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:41:27,787 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:41:27,788 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:41:27,789 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:41:27,789 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:41:27,790 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:41:27,792 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:41:27,792 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:41:27,793 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:41:27,793 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:41:27,793 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:41:27,794 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:41:27,795 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:41:27,795 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 17:41:27,827 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:41:27,827 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:41:27,828 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:41:27,828 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:41:27,828 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:41:27,829 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:41:27,829 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:41:27,829 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:41:27,829 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:41:27,829 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:41:27,830 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:41:27,831 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:41:27,831 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:41:27,831 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:41:27,831 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:41:27,832 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:41:27,832 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:41:27,832 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:41:27,832 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:41:27,833 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:41:27,833 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:41:27,833 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:41:27,833 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:41:27,834 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:41:27,835 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:41:27,835 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:41:27,835 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:41:27,835 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:41:27,835 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:41:27,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:41:27,836 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:41:27,836 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:41:27,836 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:41:27,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:41:27,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:41:27,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:41:27,927 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:41:27,928 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:41:27,929 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label53_true-unreach-call_false-termination.c [2018-09-14 17:41:28,274 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8522d2e/ce41e92dd64e4e1f9b057ed757d74587/FLAG7ad1f6403 [2018-09-14 17:41:28,559 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:41:28,562 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label53_true-unreach-call_false-termination.c [2018-09-14 17:41:28,579 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8522d2e/ce41e92dd64e4e1f9b057ed757d74587/FLAG7ad1f6403 [2018-09-14 17:41:28,597 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8522d2e/ce41e92dd64e4e1f9b057ed757d74587 [2018-09-14 17:41:28,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:41:28,613 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:41:28,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:41:28,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:41:28,625 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:41:28,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:41:28" (1/1) ... [2018-09-14 17:41:28,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58150d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:28, skipping insertion in model container [2018-09-14 17:41:28,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:41:28" (1/1) ... [2018-09-14 17:41:28,642 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:41:29,209 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:41:29,235 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:41:29,366 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:41:29,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29 WrapperNode [2018-09-14 17:41:29,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:41:29,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:41:29,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:41:29,414 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:41:29,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:41:29,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:41:29,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:41:29,545 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:41:29,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... [2018-09-14 17:41:29,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:41:29,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:41:29,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:41:29,833 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:41:29,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:41:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:41:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:41:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:41:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:41:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:41:29,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:41:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:41:29,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:41:33,792 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:41:33,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:41:33 BoogieIcfgContainer [2018-09-14 17:41:33,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:41:33,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:41:33,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:41:33,797 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:41:33,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:41:28" (1/3) ... [2018-09-14 17:41:33,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6473ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:41:33, skipping insertion in model container [2018-09-14 17:41:33,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:41:29" (2/3) ... [2018-09-14 17:41:33,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6473ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:41:33, skipping insertion in model container [2018-09-14 17:41:33,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:41:33" (3/3) ... [2018-09-14 17:41:33,802 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label53_true-unreach-call_false-termination.c [2018-09-14 17:41:33,812 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:41:33,823 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:41:33,877 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:41:33,878 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:41:33,878 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:41:33,878 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:41:33,879 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:41:33,879 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:41:33,879 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:41:33,879 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:41:33,879 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:41:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-14 17:41:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-14 17:41:33,918 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:33,919 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] [2018-09-14 17:41:33,920 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:33,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1477043892, now seen corresponding path program 1 times [2018-09-14 17:41:33,928 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:33,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:33,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:33,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:33,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:34,435 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:41:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:34,553 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:34,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:41:34,554 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:34,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:41:34,575 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:41:34,576 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:41:34,578 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-14 17:41:36,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:36,662 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-14 17:41:36,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:41:36,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2018-09-14 17:41:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:36,685 INFO L225 Difference]: With dead ends: 691 [2018-09-14 17:41:36,685 INFO L226 Difference]: Without dead ends: 434 [2018-09-14 17:41:36,693 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:41:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-14 17:41:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-14 17:41:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-14 17:41:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-09-14 17:41:36,790 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 56 [2018-09-14 17:41:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:36,792 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-09-14 17:41:36,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:41:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-09-14 17:41:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-14 17:41:36,803 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:36,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:36,804 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 167474839, now seen corresponding path program 1 times [2018-09-14 17:41:36,805 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:36,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:36,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:36,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:36,806 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:37,206 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:37,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:41:37,206 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:37,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:41:37,210 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:41:37,210 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:41:37,210 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-09-14 17:41:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:39,587 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-09-14 17:41:39,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:41:39,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-09-14 17:41:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:39,593 INFO L225 Difference]: With dead ends: 1062 [2018-09-14 17:41:39,594 INFO L226 Difference]: Without dead ends: 634 [2018-09-14 17:41:39,596 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 [2018-09-14 17:41:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-09-14 17:41:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-09-14 17:41:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-09-14 17:41:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-09-14 17:41:39,638 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 143 [2018-09-14 17:41:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:39,638 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-09-14 17:41:39,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:41:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-09-14 17:41:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-14 17:41:39,643 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:39,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:39,644 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1433253212, now seen corresponding path program 1 times [2018-09-14 17:41:39,644 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:39,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:39,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:39,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:39,646 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:39,817 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:41:39,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:41:39,818 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:39,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:41:39,820 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:41:39,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:41:39,821 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-09-14 17:41:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:43,185 INFO L93 Difference]: Finished difference Result 2350 states and 4002 transitions. [2018-09-14 17:41:43,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:41:43,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2018-09-14 17:41:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:43,201 INFO L225 Difference]: With dead ends: 2350 [2018-09-14 17:41:43,201 INFO L226 Difference]: Without dead ends: 1731 [2018-09-14 17:41:43,207 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:41:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-09-14 17:41:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-09-14 17:41:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-09-14 17:41:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2678 transitions. [2018-09-14 17:41:43,268 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2678 transitions. Word has length 152 [2018-09-14 17:41:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:43,269 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2678 transitions. [2018-09-14 17:41:43,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:41:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2678 transitions. [2018-09-14 17:41:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-14 17:41:43,281 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:43,282 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:41:43,282 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash -830750464, now seen corresponding path program 1 times [2018-09-14 17:41:43,283 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:43,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:43,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:43,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:43,284 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:41:44,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:44,457 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:41:44,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:44,465 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:44,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:45,349 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 17:41:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-09-14 17:41:45,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:45,811 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:41:46,051 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-09-14 17:41:46,895 WARN L178 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:41:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 98 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:41:47,303 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:41:47,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-14 17:41:47,304 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:41:47,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:41:47,305 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:41:47,305 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-09-14 17:41:47,305 INFO L87 Difference]: Start difference. First operand 1731 states and 2678 transitions. Second operand 5 states. [2018-09-14 17:41:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:41:51,234 INFO L93 Difference]: Finished difference Result 4910 states and 7621 transitions. [2018-09-14 17:41:51,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:41:51,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2018-09-14 17:41:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:41:51,255 INFO L225 Difference]: With dead ends: 4910 [2018-09-14 17:41:51,256 INFO L226 Difference]: Without dead ends: 3185 [2018-09-14 17:41:51,268 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 507 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:41:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2018-09-14 17:41:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 3129. [2018-09-14 17:41:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2018-09-14 17:41:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4648 transitions. [2018-09-14 17:41:51,375 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4648 transitions. Word has length 256 [2018-09-14 17:41:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:41:51,376 INFO L480 AbstractCegarLoop]: Abstraction has 3129 states and 4648 transitions. [2018-09-14 17:41:51,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:41:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4648 transitions. [2018-09-14 17:41:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-09-14 17:41:51,390 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:41:51,390 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:41:51,390 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:41:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1183303121, now seen corresponding path program 1 times [2018-09-14 17:41:51,391 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:41:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:51,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:41:51,392 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:41:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:51,908 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:41:52,119 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 17:41:52,333 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:41:52,846 WARN L178 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-09-14 17:41:53,318 WARN L178 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-09-14 17:41:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 235 proven. 164 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:41:53,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:53,755 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:41:53,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:53,763 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:53,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-09-14 17:41:54,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:54,571 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 17:41:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 157 proven. 242 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:41:55,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:41:55,225 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:41:55,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:41:55,240 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:41:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:41:55,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:41:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 301 proven. 53 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-09-14 17:41:55,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:41:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 157 proven. 242 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:41:56,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:41:56,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-14 17:41:56,597 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:41:56,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 17:41:56,599 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 17:41:56,600 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-09-14 17:41:56,600 INFO L87 Difference]: Start difference. First operand 3129 states and 4648 transitions. Second operand 15 states. [2018-09-14 17:42:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:01,266 INFO L93 Difference]: Finished difference Result 7600 states and 11195 transitions. [2018-09-14 17:42:01,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-14 17:42:01,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 341 [2018-09-14 17:42:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:01,288 INFO L225 Difference]: With dead ends: 7600 [2018-09-14 17:42:01,288 INFO L226 Difference]: Without dead ends: 4276 [2018-09-14 17:42:01,308 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1407 GetRequests, 1363 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2018-09-14 17:42:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2018-09-14 17:42:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3887. [2018-09-14 17:42:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3887 states. [2018-09-14 17:42:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 5105 transitions. [2018-09-14 17:42:01,405 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 5105 transitions. Word has length 341 [2018-09-14 17:42:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:01,406 INFO L480 AbstractCegarLoop]: Abstraction has 3887 states and 5105 transitions. [2018-09-14 17:42:01,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 17:42:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 5105 transitions. [2018-09-14 17:42:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-14 17:42:01,420 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:01,421 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:01,421 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2138732396, now seen corresponding path program 1 times [2018-09-14 17:42:01,421 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:01,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:01,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:01,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:01,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:01,784 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:42:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 236 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:42:03,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:03,179 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:03,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:03,188 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:03,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-14 17:42:03,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 147 proven. 187 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-09-14 17:42:03,795 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:42:03,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 19 [2018-09-14 17:42:03,795 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:42:03,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:42:03,796 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:42:03,796 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:42:03,796 INFO L87 Difference]: Start difference. First operand 3887 states and 5105 transitions. Second operand 5 states. [2018-09-14 17:42:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:06,237 INFO L93 Difference]: Finished difference Result 11012 states and 14724 transitions. [2018-09-14 17:42:06,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:42:06,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 366 [2018-09-14 17:42:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:06,276 INFO L225 Difference]: With dead ends: 11012 [2018-09-14 17:42:06,277 INFO L226 Difference]: Without dead ends: 7131 [2018-09-14 17:42:06,302 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 727 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2018-09-14 17:42:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2018-09-14 17:42:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 6429. [2018-09-14 17:42:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6429 states. [2018-09-14 17:42:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6429 states to 6429 states and 8279 transitions. [2018-09-14 17:42:06,468 INFO L78 Accepts]: Start accepts. Automaton has 6429 states and 8279 transitions. Word has length 366 [2018-09-14 17:42:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:06,468 INFO L480 AbstractCegarLoop]: Abstraction has 6429 states and 8279 transitions. [2018-09-14 17:42:06,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:42:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6429 states and 8279 transitions. [2018-09-14 17:42:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-09-14 17:42:06,499 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:06,499 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:06,499 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash -748883729, now seen corresponding path program 1 times [2018-09-14 17:42:06,500 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:06,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:06,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:06,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:06,501 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 461 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-14 17:42:07,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:07,486 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:07,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:07,495 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:07,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 461 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-14 17:42:07,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 461 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-14 17:42:08,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:08,271 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:08,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:08,288 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:08,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 461 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-14 17:42:08,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:09,164 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 17:42:09,288 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 17:42:09,859 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 17:42:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 461 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-14 17:42:10,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:10,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 12 [2018-09-14 17:42:10,268 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:10,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 17:42:10,270 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 17:42:10,270 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:42:10,270 INFO L87 Difference]: Start difference. First operand 6429 states and 8279 transitions. Second operand 10 states. [2018-09-14 17:42:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:16,203 INFO L93 Difference]: Finished difference Result 13973 states and 18569 transitions. [2018-09-14 17:42:16,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-14 17:42:16,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 477 [2018-09-14 17:42:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:16,235 INFO L225 Difference]: With dead ends: 13973 [2018-09-14 17:42:16,235 INFO L226 Difference]: Without dead ends: 7550 [2018-09-14 17:42:16,268 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1943 GetRequests, 1911 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2018-09-14 17:42:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2018-09-14 17:42:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 6829. [2018-09-14 17:42:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6829 states. [2018-09-14 17:42:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6829 states to 6829 states and 8390 transitions. [2018-09-14 17:42:16,413 INFO L78 Accepts]: Start accepts. Automaton has 6829 states and 8390 transitions. Word has length 477 [2018-09-14 17:42:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:16,414 INFO L480 AbstractCegarLoop]: Abstraction has 6829 states and 8390 transitions. [2018-09-14 17:42:16,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 17:42:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6829 states and 8390 transitions. [2018-09-14 17:42:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-14 17:42:16,439 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:16,440 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:16,440 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:16,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1130135117, now seen corresponding path program 1 times [2018-09-14 17:42:16,441 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:16,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:16,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:16,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:16,442 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:16,829 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-14 17:42:17,095 WARN L178 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-09-14 17:42:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 314 proven. 351 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-09-14 17:42:17,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:17,547 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:17,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:17,556 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:17,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 629 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-09-14 17:42:17,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 428 proven. 86 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-09-14 17:42:18,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:18,446 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:18,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:18,462 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:18,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 625 proven. 6 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-09-14 17:42:18,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 428 proven. 86 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-09-14 17:42:19,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:19,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-09-14 17:42:19,504 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:19,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-14 17:42:19,505 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-14 17:42:19,505 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:42:19,506 INFO L87 Difference]: Start difference. First operand 6829 states and 8390 transitions. Second operand 11 states. [2018-09-14 17:42:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:25,410 INFO L93 Difference]: Finished difference Result 16240 states and 20377 transitions. [2018-09-14 17:42:25,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-14 17:42:25,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 495 [2018-09-14 17:42:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:25,464 INFO L225 Difference]: With dead ends: 16240 [2018-09-14 17:42:25,464 INFO L226 Difference]: Without dead ends: 9417 [2018-09-14 17:42:25,489 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2044 GetRequests, 2002 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2018-09-14 17:42:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2018-09-14 17:42:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 8911. [2018-09-14 17:42:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8911 states. [2018-09-14 17:42:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8911 states to 8911 states and 10371 transitions. [2018-09-14 17:42:25,670 INFO L78 Accepts]: Start accepts. Automaton has 8911 states and 10371 transitions. Word has length 495 [2018-09-14 17:42:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:25,671 INFO L480 AbstractCegarLoop]: Abstraction has 8911 states and 10371 transitions. [2018-09-14 17:42:25,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-14 17:42:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 8911 states and 10371 transitions. [2018-09-14 17:42:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-09-14 17:42:25,692 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:25,693 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-09-14 17:42:25,693 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash -784284636, now seen corresponding path program 1 times [2018-09-14 17:42:25,694 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:25,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:25,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:25,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:25,695 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 576 proven. 433 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-09-14 17:42:27,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:27,239 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 [2018-09-14 17:42:27,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:27,250 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:27,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 851 proven. 2 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-09-14 17:42:27,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 570 proven. 86 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-09-14 17:42:28,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:28,527 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:28,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:28,544 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:28,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 643 proven. 210 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-09-14 17:42:29,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:29,798 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 17:42:29,913 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 17:42:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 281 proven. 617 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (11)] Exception during sending of exit command (exit): Broken pipe [2018-09-14 17:42:30,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:30,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-14 17:42:30,511 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:30,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 17:42:30,512 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 17:42:30,512 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-09-14 17:42:30,513 INFO L87 Difference]: Start difference. First operand 8911 states and 10371 transitions. Second operand 13 states. [2018-09-14 17:42:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:33,589 INFO L93 Difference]: Finished difference Result 17752 states and 21314 transitions. [2018-09-14 17:42:33,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 17:42:33,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 580 [2018-09-14 17:42:33,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:33,622 INFO L225 Difference]: With dead ends: 17752 [2018-09-14 17:42:33,622 INFO L226 Difference]: Without dead ends: 9085 [2018-09-14 17:42:33,642 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2348 GetRequests, 2310 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2018-09-14 17:42:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2018-09-14 17:42:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 8914. [2018-09-14 17:42:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8914 states. [2018-09-14 17:42:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8914 states to 8914 states and 10089 transitions. [2018-09-14 17:42:33,803 INFO L78 Accepts]: Start accepts. Automaton has 8914 states and 10089 transitions. Word has length 580 [2018-09-14 17:42:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:33,803 INFO L480 AbstractCegarLoop]: Abstraction has 8914 states and 10089 transitions. [2018-09-14 17:42:33,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 17:42:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8914 states and 10089 transitions. [2018-09-14 17:42:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2018-09-14 17:42:33,826 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:33,826 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2018-09-14 17:42:33,827 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:33,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2048449245, now seen corresponding path program 1 times [2018-09-14 17:42:33,827 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:33,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:33,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:33,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:33,828 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 596 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-09-14 17:42:34,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:34,414 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:42:34,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:34,422 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:34,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 879 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-09-14 17:42:34,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 596 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-09-14 17:42:35,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:35,280 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:35,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:35,295 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:35,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 879 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-09-14 17:42:35,914 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 596 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-09-14 17:42:36,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:36,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-14 17:42:36,415 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:36,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:42:36,417 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:42:36,417 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:42:36,417 INFO L87 Difference]: Start difference. First operand 8914 states and 10089 transitions. Second operand 7 states. [2018-09-14 17:42:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:40,139 INFO L93 Difference]: Finished difference Result 27929 states and 36176 transitions. [2018-09-14 17:42:40,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-14 17:42:40,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 655 [2018-09-14 17:42:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:40,260 INFO L225 Difference]: With dead ends: 27929 [2018-09-14 17:42:40,260 INFO L226 Difference]: Without dead ends: 19466 [2018-09-14 17:42:40,332 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2636 GetRequests, 2621 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:42:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19466 states. [2018-09-14 17:42:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19466 to 19030. [2018-09-14 17:42:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19030 states. [2018-09-14 17:42:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 21605 transitions. [2018-09-14 17:42:40,788 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 21605 transitions. Word has length 655 [2018-09-14 17:42:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:40,789 INFO L480 AbstractCegarLoop]: Abstraction has 19030 states and 21605 transitions. [2018-09-14 17:42:40,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:42:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 21605 transitions. [2018-09-14 17:42:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2018-09-14 17:42:40,843 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:40,844 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-09-14 17:42:40,844 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1451246628, now seen corresponding path program 1 times [2018-09-14 17:42:40,845 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:40,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:40,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:40,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:40,846 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 603 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-09-14 17:42:41,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:41,978 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 [2018-09-14 17:42:41,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:41,996 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:42,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 886 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-09-14 17:42:42,514 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 603 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-09-14 17:42:43,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:43,784 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:42:43,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:43,800 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:44,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 886 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-09-14 17:42:44,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 603 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-09-14 17:42:44,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:44,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-14 17:42:44,830 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:44,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:42:44,831 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:42:44,831 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:42:44,832 INFO L87 Difference]: Start difference. First operand 19030 states and 21605 transitions. Second operand 7 states. [2018-09-14 17:42:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:42:47,589 INFO L93 Difference]: Finished difference Result 46651 states and 60553 transitions. [2018-09-14 17:42:47,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-14 17:42:47,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 662 [2018-09-14 17:42:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:42:47,780 INFO L225 Difference]: With dead ends: 46651 [2018-09-14 17:42:47,780 INFO L226 Difference]: Without dead ends: 28072 [2018-09-14 17:42:47,936 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2664 GetRequests, 2649 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:42:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28072 states. [2018-09-14 17:42:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28072 to 26914. [2018-09-14 17:42:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26914 states. [2018-09-14 17:42:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26914 states to 26914 states and 31282 transitions. [2018-09-14 17:42:48,586 INFO L78 Accepts]: Start accepts. Automaton has 26914 states and 31282 transitions. Word has length 662 [2018-09-14 17:42:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:42:48,587 INFO L480 AbstractCegarLoop]: Abstraction has 26914 states and 31282 transitions. [2018-09-14 17:42:48,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:42:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26914 states and 31282 transitions. [2018-09-14 17:42:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2018-09-14 17:42:48,619 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:42:48,620 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:42:48,620 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:42:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1590767252, now seen corresponding path program 1 times [2018-09-14 17:42:48,621 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:42:48,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:48,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:48,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:42:48,622 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:42:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:49,176 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 17:42:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 737 proven. 599 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2018-09-14 17:42:50,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:50,416 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 [2018-09-14 17:42:50,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:50,428 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:50,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 1161 proven. 2 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-09-14 17:42:51,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:51,378 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 17:42:51,524 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-09-14 17:42:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 550 proven. 144 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2018-09-14 17:42:52,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:42:52,182 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 [2018-09-14 17:42:52,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:42:52,199 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:42:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:42:52,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:42:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 1073 proven. 8 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-09-14 17:42:53,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:42:53,436 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-09-14 17:42:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 318 proven. 808 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-09-14 17:42:54,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:42:54,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 8, 8] total 30 [2018-09-14 17:42:54,501 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:42:54,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-14 17:42:54,502 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-14 17:42:54,503 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2018-09-14 17:42:54,503 INFO L87 Difference]: Start difference. First operand 26914 states and 31282 transitions. Second operand 19 states. [2018-09-14 17:43:00,423 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-09-14 17:43:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:03,428 INFO L93 Difference]: Finished difference Result 53681 states and 65506 transitions. [2018-09-14 17:43:03,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-14 17:43:03,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 680 [2018-09-14 17:43:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:03,541 INFO L225 Difference]: With dead ends: 53681 [2018-09-14 17:43:03,542 INFO L226 Difference]: Without dead ends: 26348 [2018-09-14 17:43:03,641 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2796 GetRequests, 2723 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=861, Invalid=3695, Unknown=0, NotChecked=0, Total=4556 [2018-09-14 17:43:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26348 states. [2018-09-14 17:43:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26348 to 25443. [2018-09-14 17:43:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25443 states. [2018-09-14 17:43:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25443 states to 25443 states and 28810 transitions. [2018-09-14 17:43:04,248 INFO L78 Accepts]: Start accepts. Automaton has 25443 states and 28810 transitions. Word has length 680 [2018-09-14 17:43:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:04,249 INFO L480 AbstractCegarLoop]: Abstraction has 25443 states and 28810 transitions. [2018-09-14 17:43:04,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-14 17:43:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 25443 states and 28810 transitions. [2018-09-14 17:43:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2018-09-14 17:43:04,283 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:04,284 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:43:04,284 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -272558516, now seen corresponding path program 1 times [2018-09-14 17:43:04,284 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:04,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:04,286 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 820 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-14 17:43:05,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:05,065 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 [2018-09-14 17:43:05,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:05,072 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:05,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 1185 proven. 2 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2018-09-14 17:43:05,516 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 820 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-14 17:43:06,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:06,077 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 [2018-09-14 17:43:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:06,092 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:06,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 1185 proven. 2 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2018-09-14 17:43:06,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1898 backedges. 820 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-14 17:43:07,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:07,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-14 17:43:07,213 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:07,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:43:07,214 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:43:07,214 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:43:07,215 INFO L87 Difference]: Start difference. First operand 25443 states and 28810 transitions. Second operand 7 states. [2018-09-14 17:43:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:09,592 INFO L93 Difference]: Finished difference Result 49636 states and 56489 transitions. [2018-09-14 17:43:09,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 17:43:09,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 822 [2018-09-14 17:43:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:09,670 INFO L225 Difference]: With dead ends: 49636 [2018-09-14 17:43:09,670 INFO L226 Difference]: Without dead ends: 24644 [2018-09-14 17:43:09,742 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3304 GetRequests, 3289 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:43:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24644 states. [2018-09-14 17:43:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24644 to 23641. [2018-09-14 17:43:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23641 states. [2018-09-14 17:43:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 25970 transitions. [2018-09-14 17:43:10,096 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 25970 transitions. Word has length 822 [2018-09-14 17:43:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:10,097 INFO L480 AbstractCegarLoop]: Abstraction has 23641 states and 25970 transitions. [2018-09-14 17:43:10,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:43:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 25970 transitions. [2018-09-14 17:43:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2018-09-14 17:43:10,123 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:10,124 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:43:10,124 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1820428436, now seen corresponding path program 1 times [2018-09-14 17:43:10,125 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:10,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:10,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:10,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:10,126 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2413 backedges. 917 proven. 833 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2018-09-14 17:43:11,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:11,952 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 [2018-09-14 17:43:11,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:11,960 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:12,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2413 backedges. 1375 proven. 2 refuted. 0 times theorem prover too weak. 1036 trivial. 0 not checked. [2018-09-14 17:43:12,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2413 backedges. 933 proven. 86 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2018-09-14 17:43:13,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:13,648 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:13,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:13,664 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:14,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2413 backedges. 1370 proven. 25 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2018-09-14 17:43:14,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2413 backedges. 933 proven. 86 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2018-09-14 17:43:15,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:15,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6, 5, 5] total 23 [2018-09-14 17:43:15,276 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:15,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-14 17:43:15,277 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-14 17:43:15,278 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-09-14 17:43:15,278 INFO L87 Difference]: Start difference. First operand 23641 states and 25970 transitions. Second operand 18 states. [2018-09-14 17:43:17,324 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2018-09-14 17:43:22,259 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2018-09-14 17:43:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:23,335 INFO L93 Difference]: Finished difference Result 48728 states and 54918 transitions. [2018-09-14 17:43:23,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-14 17:43:23,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 878 [2018-09-14 17:43:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:23,404 INFO L225 Difference]: With dead ends: 48728 [2018-09-14 17:43:23,404 INFO L226 Difference]: Without dead ends: 25279 [2018-09-14 17:43:23,452 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3594 GetRequests, 3535 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=836, Invalid=2824, Unknown=0, NotChecked=0, Total=3660 [2018-09-14 17:43:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25279 states. [2018-09-14 17:43:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25279 to 24141. [2018-09-14 17:43:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24141 states. [2018-09-14 17:43:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24141 states to 24141 states and 26276 transitions. [2018-09-14 17:43:23,830 INFO L78 Accepts]: Start accepts. Automaton has 24141 states and 26276 transitions. Word has length 878 [2018-09-14 17:43:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:23,830 INFO L480 AbstractCegarLoop]: Abstraction has 24141 states and 26276 transitions. [2018-09-14 17:43:23,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-14 17:43:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 24141 states and 26276 transitions. [2018-09-14 17:43:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2018-09-14 17:43:23,854 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:23,855 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:43:23,855 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:23,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1877993325, now seen corresponding path program 1 times [2018-09-14 17:43:23,856 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:23,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:23,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:23,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:23,857 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 698 proven. 150 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-09-14 17:43:24,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:24,583 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:24,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:24,591 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:24,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1559 proven. 2 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2018-09-14 17:43:25,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 698 proven. 150 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-09-14 17:43:25,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:25,674 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:25,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:25,689 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:26,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 1559 proven. 2 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2018-09-14 17:43:26,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 698 proven. 150 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-09-14 17:43:26,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:26,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 11 [2018-09-14 17:43:26,945 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:26,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 17:43:26,947 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 17:43:26,947 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:43:26,948 INFO L87 Difference]: Start difference. First operand 24141 states and 26276 transitions. Second operand 10 states. [2018-09-14 17:43:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:30,139 INFO L93 Difference]: Finished difference Result 45946 states and 50171 transitions. [2018-09-14 17:43:30,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-14 17:43:30,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 899 [2018-09-14 17:43:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:30,173 INFO L225 Difference]: With dead ends: 45946 [2018-09-14 17:43:30,174 INFO L226 Difference]: Without dead ends: 21997 [2018-09-14 17:43:30,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3628 GetRequests, 3602 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:43:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21997 states. [2018-09-14 17:43:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21997 to 21689. [2018-09-14 17:43:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21689 states. [2018-09-14 17:43:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 22935 transitions. [2018-09-14 17:43:30,459 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 22935 transitions. Word has length 899 [2018-09-14 17:43:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:30,460 INFO L480 AbstractCegarLoop]: Abstraction has 21689 states and 22935 transitions. [2018-09-14 17:43:30,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 17:43:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 22935 transitions. [2018-09-14 17:43:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2018-09-14 17:43:30,471 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:30,471 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:43:30,471 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1167266523, now seen corresponding path program 1 times [2018-09-14 17:43:30,472 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:30,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:30,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:30,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:30,473 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 1591 proven. 6 refuted. 0 times theorem prover too weak. 1448 trivial. 0 not checked. [2018-09-14 17:43:32,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:32,022 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:32,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:32,040 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:32,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 1591 proven. 6 refuted. 0 times theorem prover too weak. 1448 trivial. 0 not checked. [2018-09-14 17:43:32,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 1591 proven. 86 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-14 17:43:33,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:33,780 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 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:33,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:33,796 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:34,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 1591 proven. 6 refuted. 0 times theorem prover too weak. 1448 trivial. 0 not checked. [2018-09-14 17:43:34,692 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 1591 proven. 86 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-09-14 17:43:35,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:35,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 13 [2018-09-14 17:43:35,765 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:35,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-14 17:43:35,766 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-14 17:43:35,766 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:43:35,766 INFO L87 Difference]: Start difference. First operand 21689 states and 22935 transitions. Second operand 8 states. [2018-09-14 17:43:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:43:39,531 INFO L93 Difference]: Finished difference Result 49751 states and 52703 transitions. [2018-09-14 17:43:39,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-14 17:43:39,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 999 [2018-09-14 17:43:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:43:39,591 INFO L225 Difference]: With dead ends: 49751 [2018-09-14 17:43:39,591 INFO L226 Difference]: Without dead ends: 28254 [2018-09-14 17:43:39,621 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4020 GetRequests, 3996 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-09-14 17:43:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28254 states. [2018-09-14 17:43:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28254 to 26126. [2018-09-14 17:43:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26126 states. [2018-09-14 17:43:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26126 states to 26126 states and 27633 transitions. [2018-09-14 17:43:39,939 INFO L78 Accepts]: Start accepts. Automaton has 26126 states and 27633 transitions. Word has length 999 [2018-09-14 17:43:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:43:39,939 INFO L480 AbstractCegarLoop]: Abstraction has 26126 states and 27633 transitions. [2018-09-14 17:43:39,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-14 17:43:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26126 states and 27633 transitions. [2018-09-14 17:43:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1574 [2018-09-14 17:43:39,967 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:43:39,968 INFO L376 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:43:39,968 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:43:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash -234418177, now seen corresponding path program 1 times [2018-09-14 17:43:39,969 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:43:39,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:39,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:39,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:43:39,970 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:43:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 1732 proven. 4208 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2018-09-14 17:43:44,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:44,313 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:43:44,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:44,321 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:44,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 2646 proven. 2 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2018-09-14 17:43:45,736 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:46,036 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:43:46,266 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:43:47,550 WARN L178 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-14 17:43:48,057 WARN L178 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-09-14 17:43:49,485 WARN L178 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-14 17:43:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 1804 proven. 86 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2018-09-14 17:43:51,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:43:51,512 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 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:43:51,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:43:51,529 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:43:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:43:52,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:43:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 2648 proven. 60 refuted. 0 times theorem prover too weak. 4773 trivial. 0 not checked. [2018-09-14 17:43:53,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:43:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 1804 proven. 86 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2018-09-14 17:43:57,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:43:57,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5, 6, 5] total 32 [2018-09-14 17:43:57,228 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:43:57,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-14 17:43:57,229 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-14 17:43:57,230 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2018-09-14 17:43:57,230 INFO L87 Difference]: Start difference. First operand 26126 states and 27633 transitions. Second operand 24 states. [2018-09-14 17:44:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:44:27,442 INFO L93 Difference]: Finished difference Result 53663 states and 62679 transitions. [2018-09-14 17:44:27,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-14 17:44:27,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1573 [2018-09-14 17:44:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:44:27,608 INFO L225 Difference]: With dead ends: 53663 [2018-09-14 17:44:27,609 INFO L226 Difference]: Without dead ends: 27729 [2018-09-14 17:44:27,686 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6508 GetRequests, 6345 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9907 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3771, Invalid=22635, Unknown=0, NotChecked=0, Total=26406 [2018-09-14 17:44:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27729 states. [2018-09-14 17:44:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27729 to 24272. [2018-09-14 17:44:28,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24272 states. [2018-09-14 17:44:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24272 states to 24272 states and 25795 transitions. [2018-09-14 17:44:28,232 INFO L78 Accepts]: Start accepts. Automaton has 24272 states and 25795 transitions. Word has length 1573 [2018-09-14 17:44:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:44:28,234 INFO L480 AbstractCegarLoop]: Abstraction has 24272 states and 25795 transitions. [2018-09-14 17:44:28,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-14 17:44:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 24272 states and 25795 transitions. [2018-09-14 17:44:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1735 [2018-09-14 17:44:28,267 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:44:28,268 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:44:28,268 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:44:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1954670180, now seen corresponding path program 1 times [2018-09-14 17:44:28,269 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:44:28,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:44:28,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:28,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:44:28,270 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:44:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:29,143 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 17:44:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8936 backedges. 2107 proven. 338 refuted. 0 times theorem prover too weak. 6491 trivial. 0 not checked. [2018-09-14 17:44:30,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:44:30,743 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:44:30,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:30,751 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:44:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:31,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:44:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8936 backedges. 3052 proven. 2 refuted. 0 times theorem prover too weak. 5882 trivial. 0 not checked. [2018-09-14 17:44:32,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:44:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8936 backedges. 2128 proven. 86 refuted. 0 times theorem prover too weak. 6722 trivial. 0 not checked. [2018-09-14 17:44:33,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:44:33,951 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 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:44:33,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:33,967 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:44:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:34,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:44:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8936 backedges. 3052 proven. 2 refuted. 0 times theorem prover too weak. 5882 trivial. 0 not checked. [2018-09-14 17:44:35,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:44:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8936 backedges. 2128 proven. 86 refuted. 0 times theorem prover too weak. 6722 trivial. 0 not checked. [2018-09-14 17:44:37,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:44:37,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 12 [2018-09-14 17:44:37,167 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:44:37,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-14 17:44:37,169 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-14 17:44:37,169 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:44:37,169 INFO L87 Difference]: Start difference. First operand 24272 states and 25795 transitions. Second operand 11 states. [2018-09-14 17:44:39,459 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-09-14 17:44:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:44:41,082 INFO L93 Difference]: Finished difference Result 49804 states and 52954 transitions. [2018-09-14 17:44:41,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-14 17:44:41,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1734 [2018-09-14 17:44:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:44:41,092 INFO L225 Difference]: With dead ends: 49804 [2018-09-14 17:44:41,092 INFO L226 Difference]: Without dead ends: 5853 [2018-09-14 17:44:41,136 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6979 GetRequests, 6944 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2018-09-14 17:44:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2018-09-14 17:44:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5205. [2018-09-14 17:44:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5205 states. [2018-09-14 17:44:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 5353 transitions. [2018-09-14 17:44:41,228 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 5353 transitions. Word has length 1734 [2018-09-14 17:44:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:44:41,230 INFO L480 AbstractCegarLoop]: Abstraction has 5205 states and 5353 transitions. [2018-09-14 17:44:41,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-14 17:44:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 5353 transitions. [2018-09-14 17:44:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1793 [2018-09-14 17:44:41,260 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:44:41,261 INFO L376 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 8, 8, 8, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:44:41,262 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:44:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash 370568420, now seen corresponding path program 1 times [2018-09-14 17:44:41,263 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:44:41,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:44:41,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:41,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:44:41,264 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:44:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:42,807 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:44:43,004 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:44:43,218 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:44:43,469 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 17:44:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10140 backedges. 2081 proven. 2167 refuted. 0 times theorem prover too weak. 5892 trivial. 0 not checked. [2018-09-14 17:44:46,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:44:46,669 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:44:46,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:46,676 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:44:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:47,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:44:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10140 backedges. 4137 proven. 6 refuted. 0 times theorem prover too weak. 5997 trivial. 0 not checked. [2018-09-14 17:44:48,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:44:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10140 backedges. 3133 proven. 170 refuted. 0 times theorem prover too weak. 6837 trivial. 0 not checked. [2018-09-14 17:44:50,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:44:50,454 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 31 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 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:44:50,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:44:50,470 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:44:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:44:51,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:44:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10140 backedges. 3184 proven. 1062 refuted. 0 times theorem prover too weak. 5894 trivial. 0 not checked. [2018-09-14 17:44:53,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:44:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10140 backedges. 891 proven. 3400 refuted. 0 times theorem prover too weak. 5849 trivial. 0 not checked. [2018-09-14 17:44:59,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:44:59,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 11, 11] total 31 [2018-09-14 17:44:59,553 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:44:59,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-14 17:44:59,555 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-14 17:44:59,555 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2018-09-14 17:44:59,555 INFO L87 Difference]: Start difference. First operand 5205 states and 5353 transitions. Second operand 16 states. [2018-09-14 17:45:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:45:05,933 INFO L93 Difference]: Finished difference Result 10478 states and 10901 transitions. [2018-09-14 17:45:05,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-14 17:45:05,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1792 [2018-09-14 17:45:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:45:05,941 INFO L225 Difference]: With dead ends: 10478 [2018-09-14 17:45:05,941 INFO L226 Difference]: Without dead ends: 4915 [2018-09-14 17:45:05,947 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7248 GetRequests, 7155 SyntacticMatches, 34 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=777, Invalid=2883, Unknown=0, NotChecked=0, Total=3660 [2018-09-14 17:45:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2018-09-14 17:45:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4458. [2018-09-14 17:45:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4458 states. [2018-09-14 17:45:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 4569 transitions. [2018-09-14 17:45:06,022 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 4569 transitions. Word has length 1792 [2018-09-14 17:45:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:45:06,023 INFO L480 AbstractCegarLoop]: Abstraction has 4458 states and 4569 transitions. [2018-09-14 17:45:06,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-14 17:45:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 4569 transitions. [2018-09-14 17:45:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1811 [2018-09-14 17:45:06,044 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:45:06,045 INFO L376 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:45:06,045 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:45:06,046 INFO L82 PathProgramCache]: Analyzing trace with hash -341950868, now seen corresponding path program 1 times [2018-09-14 17:45:06,046 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:45:06,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:45:06,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:45:06,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:45:06,047 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:45:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:45:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10280 backedges. 2066 proven. 6087 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2018-09-14 17:45:11,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:45:11,892 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:45:11,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:45:11,900 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:45:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:45:12,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-14 17:45:12,323 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-14 17:45:12,525 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:45:12,525 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:45:12,530 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:45:12,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:45:12 BoogieIcfgContainer [2018-09-14 17:45:12,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:45:12,531 INFO L168 Benchmark]: Toolchain (without parser) took 223921.10 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 639.2 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:12,532 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:45:12,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 796.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:12,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 130.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:12,533 INFO L168 Benchmark]: Boogie Preprocessor took 287.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -873.7 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:12,534 INFO L168 Benchmark]: RCFGBuilder took 3960.00 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:12,535 INFO L168 Benchmark]: TraceAbstraction took 218736.87 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 537.7 MB. Max. memory is 7.1 GB. [2018-09-14 17:45:12,538 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 796.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 130.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 287.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -873.7 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3960.00 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218736.87 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 537.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 151]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 151). Cancelled while BasicCegarLoop was analyzing trace of length 1811 with TraceHistMax 15, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 218.6s OverallTime, 20 OverallIterations, 15 TraceHistogramMax, 108.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1862 SDtfs, 48188 SDslu, 4612 SDs, 0 SdLazy, 67666 SolverSat, 10156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52418 GetRequests, 51686 SyntacticMatches, 102 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15207 ImplicationChecksByTransitivity, 33.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26914occurred in iteration=11, 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: 4.7s AutomataMinimizationTime, 19 MinimizatonAttempts, 14192 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 9.7s SatisfiabilityAnalysisTime, 72.8s InterpolantComputationTime, 39356 NumberOfCodeBlocks, 39356 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 65073 ConstructedInterpolants, 0 QuantifiedInterpolants, 227322968 SizeOfPredicates, 75 NumberOfNonLiveVariables, 36740 ConjunctsInSsa, 426 ConjunctsInUnsatCore, 79 InterpolantComputations, 5 PerfectInterpolantSequences, 201418/220311 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/Problem14_label53_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-45-12-552.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label53_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-45-12-552.csv Completed graceful shutdown