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/Problem16_label29_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:04:51,995 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:04:51,997 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:04:52,014 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:04:52,014 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:04:52,016 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:04:52,017 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:04:52,019 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:04:52,020 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:04:52,021 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:04:52,022 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:04:52,023 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:04:52,023 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:04:52,025 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:04:52,026 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:04:52,027 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:04:52,027 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:04:52,032 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:04:52,039 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:04:52,041 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:04:52,046 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:04:52,047 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:04:52,053 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 12:04:52,053 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 12:04:52,053 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 12:04:52,054 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 12:04:52,057 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 12:04:52,058 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 12:04:52,062 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 12:04:52,063 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 12:04:52,063 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 12:04:52,066 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 12:04:52,066 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 12:04:52,066 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 12:04:52,067 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 12:04:52,068 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 12:04:52,068 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 12:04:52,088 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:04:52,089 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:04:52,089 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:04:52,090 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:04:52,090 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:04:52,090 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:04:52,090 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:04:52,091 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:04:52,091 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:04:52,091 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:04:52,091 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:04:52,091 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:04:52,092 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:04:52,092 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:04:52,093 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:04:52,093 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:04:52,093 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:04:52,093 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:04:52,093 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:04:52,094 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:04:52,094 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:04:52,094 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:04:52,094 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:04:52,095 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:04:52,095 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:04:52,096 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:04:52,096 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:04:52,096 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:04:52,096 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:04:52,097 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:04:52,097 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:04:52,097 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:04:52,097 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:04:52,098 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:04:52,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:04:52,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:04:52,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:04:52,188 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:04:52,188 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:04:52,189 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29_true-unreach-call.c [2018-09-18 12:04:52,533 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1bd5ab41/70c61b50837440b697a3e72078450750/FLAGa80b8a90f [2018-09-18 12:04:52,986 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:04:52,991 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29_true-unreach-call.c [2018-09-18 12:04:53,015 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1bd5ab41/70c61b50837440b697a3e72078450750/FLAGa80b8a90f [2018-09-18 12:04:53,032 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1bd5ab41/70c61b50837440b697a3e72078450750 [2018-09-18 12:04:53,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:04:53,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:04:53,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:04:53,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:04:53,056 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:04:53,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:04:53" (1/1) ... [2018-09-18 12:04:53,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ea9e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:53, skipping insertion in model container [2018-09-18 12:04:53,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:04:53" (1/1) ... [2018-09-18 12:04:53,074 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:04:53,880 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:04:53,898 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:04:54,341 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:04:54,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54 WrapperNode [2018-09-18 12:04:54,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:04:54,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:04:54,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:04:54,445 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:04:54,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:54,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:54,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:04:54,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:04:54,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:04:54,644 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:04:54,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:54,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:54,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:54,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:55,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:55,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:55,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... [2018-09-18 12:04:55,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:04:55,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:04:55,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:04:55,108 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:04:55,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:04:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:04:55,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:04:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 12:04:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 12:04:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 12:04:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 12:04:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:04:55,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:04:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:04:55,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:05:01,972 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:05:01,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:05:01 BoogieIcfgContainer [2018-09-18 12:05:01,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:05:01,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:05:01,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:05:01,978 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:05:01,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:04:53" (1/3) ... [2018-09-18 12:05:01,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bec64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:05:01, skipping insertion in model container [2018-09-18 12:05:01,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:04:54" (2/3) ... [2018-09-18 12:05:01,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bec64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:05:01, skipping insertion in model container [2018-09-18 12:05:01,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:05:01" (3/3) ... [2018-09-18 12:05:01,983 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label29_true-unreach-call.c [2018-09-18 12:05:01,993 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:05:02,005 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:05:02,061 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:05:02,062 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:05:02,063 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:05:02,063 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:05:02,063 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:05:02,063 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:05:02,063 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:05:02,063 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:05:02,064 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:05:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-18 12:05:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-18 12:05:02,107 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:02,109 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] [2018-09-18 12:05:02,110 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:02,115 INFO L82 PathProgramCache]: Analyzing trace with hash 354183419, now seen corresponding path program 1 times [2018-09-18 12:05:02,117 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:02,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:02,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:02,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:02,171 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:02,625 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:05:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:05:02,761 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:05:02,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:05:02,761 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:05:02,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:05:02,784 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:05:02,785 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:05:02,788 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-18 12:05:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:06,655 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-18 12:05:06,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:05:06,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-09-18 12:05:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:06,690 INFO L225 Difference]: With dead ends: 1156 [2018-09-18 12:05:06,691 INFO L226 Difference]: Without dead ends: 744 [2018-09-18 12:05:06,699 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:05:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-18 12:05:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-18 12:05:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-18 12:05:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-09-18 12:05:06,806 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 53 [2018-09-18 12:05:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:06,807 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-09-18 12:05:06,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:05:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-09-18 12:05:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-18 12:05:06,818 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:06,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:06,819 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:06,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1132116568, now seen corresponding path program 1 times [2018-09-18 12:05:06,820 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:06,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:06,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:06,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:06,822 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:05:07,258 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:05:07,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:05:07,259 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:05:07,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:05:07,262 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:05:07,262 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:05:07,262 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-09-18 12:05:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:15,275 INFO L93 Difference]: Finished difference Result 2183 states and 3908 transitions. [2018-09-18 12:05:15,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:05:15,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2018-09-18 12:05:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:15,289 INFO L225 Difference]: With dead ends: 2183 [2018-09-18 12:05:15,289 INFO L226 Difference]: Without dead ends: 1445 [2018-09-18 12:05:15,295 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:05:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2018-09-18 12:05:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1424. [2018-09-18 12:05:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2018-09-18 12:05:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2239 transitions. [2018-09-18 12:05:15,362 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2239 transitions. Word has length 161 [2018-09-18 12:05:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:15,362 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 2239 transitions. [2018-09-18 12:05:15,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:05:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2239 transitions. [2018-09-18 12:05:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-18 12:05:15,366 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:15,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:15,367 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:15,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1480605381, now seen corresponding path program 1 times [2018-09-18 12:05:15,367 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:15,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:15,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:15,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:15,369 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:05:15,793 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:05:15,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:05:15,793 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:05:15,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:05:15,795 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:05:15,795 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:05:15,796 INFO L87 Difference]: Start difference. First operand 1424 states and 2239 transitions. Second operand 6 states. [2018-09-18 12:05:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:20,468 INFO L93 Difference]: Finished difference Result 3902 states and 6351 transitions. [2018-09-18 12:05:20,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:05:20,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-09-18 12:05:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:20,485 INFO L225 Difference]: With dead ends: 3902 [2018-09-18 12:05:20,485 INFO L226 Difference]: Without dead ends: 2484 [2018-09-18 12:05:20,552 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:05:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2018-09-18 12:05:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2474. [2018-09-18 12:05:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2474 states. [2018-09-18 12:05:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3744 transitions. [2018-09-18 12:05:20,637 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3744 transitions. Word has length 164 [2018-09-18 12:05:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:20,638 INFO L480 AbstractCegarLoop]: Abstraction has 2474 states and 3744 transitions. [2018-09-18 12:05:20,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:05:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3744 transitions. [2018-09-18 12:05:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-18 12:05:20,648 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:20,648 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:05:20,649 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1539440952, now seen corresponding path program 1 times [2018-09-18 12:05:20,649 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:20,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:20,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:20,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:20,651 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:21,029 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:05:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 92 proven. 106 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:05:21,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:21,158 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:21,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:21,167 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:21,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-18 12:05:21,857 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 92 proven. 106 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:05:22,214 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:05:22,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 12:05:22,214 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:05:22,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:05:22,216 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:05:22,216 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:05:22,217 INFO L87 Difference]: Start difference. First operand 2474 states and 3744 transitions. Second operand 5 states. [2018-09-18 12:05:28,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:28,458 INFO L93 Difference]: Finished difference Result 8994 states and 13505 transitions. [2018-09-18 12:05:28,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 12:05:28,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2018-09-18 12:05:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:28,501 INFO L225 Difference]: With dead ends: 8994 [2018-09-18 12:05:28,502 INFO L226 Difference]: Without dead ends: 6526 [2018-09-18 12:05:28,521 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 555 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-18 12:05:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2018-09-18 12:05:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 6271. [2018-09-18 12:05:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6271 states. [2018-09-18 12:05:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 8315 transitions. [2018-09-18 12:05:28,687 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 8315 transitions. Word has length 280 [2018-09-18 12:05:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:28,687 INFO L480 AbstractCegarLoop]: Abstraction has 6271 states and 8315 transitions. [2018-09-18 12:05:28,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:05:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 8315 transitions. [2018-09-18 12:05:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-09-18 12:05:28,707 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:28,708 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:28,708 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:28,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1669932742, now seen corresponding path program 1 times [2018-09-18 12:05:28,709 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:28,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:28,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:28,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:28,710 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:29,096 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:05:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 12:05:29,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:29,679 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:29,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:29,688 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:29,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 407 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-18 12:05:30,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 242 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 12:05:30,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:30,712 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:05:30,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:30,729 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:31,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 407 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-18 12:05:31,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 242 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 12:05:31,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:05:31,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-18 12:05:31,662 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:05:31,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:05:31,665 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:05:31,665 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:05:31,666 INFO L87 Difference]: Start difference. First operand 6271 states and 8315 transitions. Second operand 9 states. [2018-09-18 12:05:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:39,748 INFO L93 Difference]: Finished difference Result 16718 states and 22813 transitions. [2018-09-18 12:05:39,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-18 12:05:39,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 489 [2018-09-18 12:05:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:39,804 INFO L225 Difference]: With dead ends: 16718 [2018-09-18 12:05:39,805 INFO L226 Difference]: Without dead ends: 10453 [2018-09-18 12:05:39,857 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 1968 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-09-18 12:05:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10453 states. [2018-09-18 12:05:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10453 to 10167. [2018-09-18 12:05:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10167 states. [2018-09-18 12:05:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10167 states to 10167 states and 12417 transitions. [2018-09-18 12:05:40,119 INFO L78 Accepts]: Start accepts. Automaton has 10167 states and 12417 transitions. Word has length 489 [2018-09-18 12:05:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:40,120 INFO L480 AbstractCegarLoop]: Abstraction has 10167 states and 12417 transitions. [2018-09-18 12:05:40,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:05:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10167 states and 12417 transitions. [2018-09-18 12:05:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2018-09-18 12:05:40,172 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:40,173 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:05:40,173 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:40,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1301512600, now seen corresponding path program 1 times [2018-09-18 12:05:40,174 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:40,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:40,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:40,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:40,175 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 582 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-18 12:05:41,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:41,612 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:41,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:41,628 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:41,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 1092 proven. 2 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-09-18 12:05:42,610 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 582 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-18 12:05:43,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:43,219 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:05:43,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:43,236 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:43,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 1092 proven. 2 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-09-18 12:05:44,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 582 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-18 12:05:45,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:05:45,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 12:05:45,323 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:05:45,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:05:45,325 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:05:45,325 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:05:45,325 INFO L87 Difference]: Start difference. First operand 10167 states and 12417 transitions. Second operand 9 states. [2018-09-18 12:05:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:57,647 INFO L93 Difference]: Finished difference Result 20865 states and 26239 transitions. [2018-09-18 12:05:57,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 12:05:57,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 845 [2018-09-18 12:05:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:57,711 INFO L225 Difference]: With dead ends: 20865 [2018-09-18 12:05:57,711 INFO L226 Difference]: Without dead ends: 10704 [2018-09-18 12:05:57,748 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3398 GetRequests, 3375 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2018-09-18 12:05:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10704 states. [2018-09-18 12:05:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10704 to 10691. [2018-09-18 12:05:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10691 states. [2018-09-18 12:05:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10691 states to 10691 states and 12888 transitions. [2018-09-18 12:05:57,974 INFO L78 Accepts]: Start accepts. Automaton has 10691 states and 12888 transitions. Word has length 845 [2018-09-18 12:05:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:57,975 INFO L480 AbstractCegarLoop]: Abstraction has 10691 states and 12888 transitions. [2018-09-18 12:05:57,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:05:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10691 states and 12888 transitions. [2018-09-18 12:05:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2018-09-18 12:05:58,003 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:58,003 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:58,004 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1566960923, now seen corresponding path program 1 times [2018-09-18 12:05:58,004 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:58,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:58,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:58,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:58,006 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:58,974 WARN L178 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 12:05:59,303 WARN L178 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-18 12:05:59,696 WARN L178 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 12:06:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 867 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-18 12:06:01,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:01,400 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:06:01,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:01,408 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:01,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-09-18 12:06:02,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 276 proven. 450 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2018-09-18 12:06:03,250 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:06:03,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 19 [2018-09-18 12:06:03,251 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:06:03,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:06:03,252 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:06:03,252 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-09-18 12:06:03,252 INFO L87 Difference]: Start difference. First operand 10691 states and 12888 transitions. Second operand 5 states. [2018-09-18 12:06:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:06:08,726 INFO L93 Difference]: Finished difference Result 36705 states and 44889 transitions. [2018-09-18 12:06:08,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 12:06:08,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 853 [2018-09-18 12:06:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:06:08,834 INFO L225 Difference]: With dead ends: 36705 [2018-09-18 12:06:08,834 INFO L226 Difference]: Without dead ends: 26020 [2018-09-18 12:06:08,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1701 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2018-09-18 12:06:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2018-09-18 12:06:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 25164. [2018-09-18 12:06:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25164 states. [2018-09-18 12:06:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25164 states to 25164 states and 30002 transitions. [2018-09-18 12:06:09,438 INFO L78 Accepts]: Start accepts. Automaton has 25164 states and 30002 transitions. Word has length 853 [2018-09-18 12:06:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:06:09,439 INFO L480 AbstractCegarLoop]: Abstraction has 25164 states and 30002 transitions. [2018-09-18 12:06:09,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:06:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25164 states and 30002 transitions. [2018-09-18 12:06:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-09-18 12:06:09,526 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:06:09,527 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, 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, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:06:09,527 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:06:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1585438444, now seen corresponding path program 1 times [2018-09-18 12:06:09,528 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:06:09,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:06:09,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:09,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:06:09,529 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:06:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:10,642 WARN L178 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-18 12:06:10,992 WARN L178 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 12:06:11,482 WARN L178 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-18 12:06:12,151 WARN L178 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-09-18 12:06:12,722 WARN L178 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-09-18 12:06:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 985 proven. 2 refuted. 0 times theorem prover too weak. 1043 trivial. 0 not checked. [2018-09-18 12:06:14,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:14,447 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 [2018-09-18 12:06:14,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:14,455 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:14,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1265 proven. 2 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2018-09-18 12:06:15,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 297 proven. 1138 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-09-18 12:06:18,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:18,246 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 [2018-09-18 12:06:18,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:18,263 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:18,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1354 proven. 2 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-09-18 12:06:20,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:20,291 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-18 12:06:20,441 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-18 12:06:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 722 proven. 115 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2018-09-18 12:06:21,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:06:21,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 5, 5] total 29 [2018-09-18 12:06:21,465 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:06:21,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-18 12:06:21,467 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-18 12:06:21,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-09-18 12:06:21,468 INFO L87 Difference]: Start difference. First operand 25164 states and 30002 transitions. Second operand 19 states. [2018-09-18 12:06:42,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:06:42,489 INFO L93 Difference]: Finished difference Result 61337 states and 73998 transitions. [2018-09-18 12:06:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-18 12:06:42,489 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 992 [2018-09-18 12:06:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:06:42,647 INFO L225 Difference]: With dead ends: 61337 [2018-09-18 12:06:42,647 INFO L226 Difference]: Without dead ends: 36179 [2018-09-18 12:06:42,760 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4054 GetRequests, 3983 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2018-09-18 12:06:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36179 states. [2018-09-18 12:06:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36179 to 33786. [2018-09-18 12:06:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33786 states. [2018-09-18 12:06:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 39237 transitions. [2018-09-18 12:06:43,699 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 39237 transitions. Word has length 992 [2018-09-18 12:06:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:06:43,700 INFO L480 AbstractCegarLoop]: Abstraction has 33786 states and 39237 transitions. [2018-09-18 12:06:43,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-18 12:06:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 39237 transitions. [2018-09-18 12:06:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2018-09-18 12:06:43,793 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:06:43,794 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:06:43,794 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:06:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1817666243, now seen corresponding path program 1 times [2018-09-18 12:06:43,795 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:06:43,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:06:43,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:43,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:06:43,796 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:06:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-18 12:06:45,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:45,709 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) [2018-09-18 12:06:45,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:45,724 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:06:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:45,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-18 12:06:47,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:47,515 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-09-18 12:06:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-18 12:06:49,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:49,560 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 [2018-09-18 12:06:49,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:49,575 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:50,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2018-09-18 12:06:51,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-18 12:06:53,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:06:53,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 6, 5] total 17 [2018-09-18 12:06:53,369 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:06:53,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-18 12:06:53,371 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-18 12:06:53,371 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-09-18 12:06:53,371 INFO L87 Difference]: Start difference. First operand 33786 states and 39237 transitions. Second operand 11 states. [2018-09-18 12:07:07,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:07:07,470 INFO L93 Difference]: Finished difference Result 71914 states and 86771 transitions. [2018-09-18 12:07:07,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-18 12:07:07,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1062 [2018-09-18 12:07:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:07:07,631 INFO L225 Difference]: With dead ends: 71914 [2018-09-18 12:07:07,632 INFO L226 Difference]: Without dead ends: 30035 [2018-09-18 12:07:07,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4307 GetRequests, 4261 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2018-09-18 12:07:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30035 states. [2018-09-18 12:07:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30035 to 26838. [2018-09-18 12:07:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26838 states. [2018-09-18 12:07:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26838 states to 26838 states and 28733 transitions. [2018-09-18 12:07:08,409 INFO L78 Accepts]: Start accepts. Automaton has 26838 states and 28733 transitions. Word has length 1062 [2018-09-18 12:07:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:07:08,410 INFO L480 AbstractCegarLoop]: Abstraction has 26838 states and 28733 transitions. [2018-09-18 12:07:08,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-18 12:07:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26838 states and 28733 transitions. [2018-09-18 12:07:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1305 [2018-09-18 12:07:08,452 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:08,453 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, 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, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-09-18 12:07:08,453 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1016556783, now seen corresponding path program 1 times [2018-09-18 12:07:08,455 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:08,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:08,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:08,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:08,456 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:09,705 WARN L178 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-18 12:07:09,979 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-09-18 12:07:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1874 proven. 215 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2018-09-18 12:07:13,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:07:13,332 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 [2018-09-18 12:07:13,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:13,341 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:07:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:13,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:07:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1309 proven. 2 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2018-09-18 12:07:14,811 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:07:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1309 proven. 2 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2018-09-18 12:07:17,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:07:17,038 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 [2018-09-18 12:07:17,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:17,054 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:07:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:17,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:07:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 2190 proven. 2 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2018-09-18 12:07:18,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:07:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 788 proven. 228 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2018-09-18 12:07:20,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:07:20,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 27 [2018-09-18 12:07:20,511 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:07:20,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-18 12:07:20,513 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-18 12:07:20,513 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2018-09-18 12:07:20,513 INFO L87 Difference]: Start difference. First operand 26838 states and 28733 transitions. Second operand 20 states. [2018-09-18 12:07:28,090 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-09-18 12:07:32,903 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2018-09-18 12:07:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:07:36,935 INFO L93 Difference]: Finished difference Result 56969 states and 61238 transitions. [2018-09-18 12:07:36,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-18 12:07:36,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1304 [2018-09-18 12:07:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:07:37,030 INFO L225 Difference]: With dead ends: 56969 [2018-09-18 12:07:37,030 INFO L226 Difference]: Without dead ends: 28999 [2018-09-18 12:07:37,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5305 GetRequests, 5238 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=769, Invalid=3391, Unknown=0, NotChecked=0, Total=4160 [2018-09-18 12:07:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28999 states. [2018-09-18 12:07:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28999 to 27398. [2018-09-18 12:07:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27398 states. [2018-09-18 12:07:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 29140 transitions. [2018-09-18 12:07:37,509 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 29140 transitions. Word has length 1304 [2018-09-18 12:07:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:07:37,511 INFO L480 AbstractCegarLoop]: Abstraction has 27398 states and 29140 transitions. [2018-09-18 12:07:37,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-18 12:07:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 29140 transitions. [2018-09-18 12:07:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1337 [2018-09-18 12:07:37,545 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:37,546 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:07:37,546 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash 453709302, now seen corresponding path program 1 times [2018-09-18 12:07:37,547 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:37,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:37,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:37,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:37,548 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 926 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-09-18 12:07:39,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:07:39,209 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:07:39,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:39,216 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:07:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:39,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:07:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 2654 proven. 2 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2018-09-18 12:07:40,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:07:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 926 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-09-18 12:07:41,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:07:41,030 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 [2018-09-18 12:07:41,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:41,185 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:07:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:41,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:07:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 2654 proven. 2 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2018-09-18 12:07:42,523 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:07:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 926 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-09-18 12:07:43,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:07:43,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 12:07:43,423 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:07:43,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:07:43,425 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:07:43,425 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:07:43,426 INFO L87 Difference]: Start difference. First operand 27398 states and 29140 transitions. Second operand 9 states. [2018-09-18 12:07:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:07:47,917 INFO L93 Difference]: Finished difference Result 53424 states and 57288 transitions. [2018-09-18 12:07:47,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-18 12:07:47,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1336 [2018-09-18 12:07:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:07:48,000 INFO L225 Difference]: With dead ends: 53424 [2018-09-18 12:07:48,000 INFO L226 Difference]: Without dead ends: 28400 [2018-09-18 12:07:48,055 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5366 GetRequests, 5345 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-18 12:07:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28400 states. [2018-09-18 12:07:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28400 to 25370. [2018-09-18 12:07:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25370 states. [2018-09-18 12:07:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25370 states to 25370 states and 26640 transitions. [2018-09-18 12:07:48,601 INFO L78 Accepts]: Start accepts. Automaton has 25370 states and 26640 transitions. Word has length 1336 [2018-09-18 12:07:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:07:48,602 INFO L480 AbstractCegarLoop]: Abstraction has 25370 states and 26640 transitions. [2018-09-18 12:07:48,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:07:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25370 states and 26640 transitions. [2018-09-18 12:07:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2018-09-18 12:07:48,627 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:48,628 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, 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, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-18 12:07:48,628 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2125149362, now seen corresponding path program 1 times [2018-09-18 12:07:48,629 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:48,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:48,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:48,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:48,630 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:49,383 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:07:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 1774 proven. 643 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2018-09-18 12:07:51,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:07:51,032 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:07:51,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:51,040 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:07:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:51,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:07:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 2911 trivial. 0 not checked. [2018-09-18 12:07:51,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:07:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 2911 trivial. 0 not checked. [2018-09-18 12:07:52,614 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:07:52,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-18 12:07:52,615 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:07:52,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:07:52,616 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:07:52,616 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:07:52,616 INFO L87 Difference]: Start difference. First operand 25370 states and 26640 transitions. Second operand 3 states. [2018-09-18 12:07:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:07:54,063 INFO L93 Difference]: Finished difference Result 51788 states and 54684 transitions. [2018-09-18 12:07:54,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:07:54,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1359 [2018-09-18 12:07:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:07:54,124 INFO L225 Difference]: With dead ends: 51788 [2018-09-18 12:07:54,124 INFO L226 Difference]: Without dead ends: 27102 [2018-09-18 12:07:54,163 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2732 GetRequests, 2720 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:07:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27102 states. [2018-09-18 12:07:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27102 to 26764. [2018-09-18 12:07:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26764 states. [2018-09-18 12:07:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 28268 transitions. [2018-09-18 12:07:54,680 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 28268 transitions. Word has length 1359 [2018-09-18 12:07:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:07:54,681 INFO L480 AbstractCegarLoop]: Abstraction has 26764 states and 28268 transitions. [2018-09-18 12:07:54,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:07:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 28268 transitions. [2018-09-18 12:07:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1395 [2018-09-18 12:07:54,710 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:54,711 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 12:07:54,711 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash -779481978, now seen corresponding path program 1 times [2018-09-18 12:07:54,711 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:54,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:54,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:54,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:54,713 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:55,775 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-18 12:07:56,046 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-18 12:07:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1067 proven. 110 refuted. 0 times theorem prover too weak. 2979 trivial. 0 not checked. [2018-09-18 12:07:57,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:07:57,480 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:07:57,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:57,488 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:07:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:57,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:07:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 2748 proven. 6 refuted. 0 times theorem prover too weak. 1402 trivial. 0 not checked. [2018-09-18 12:07:58,795 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1624 proven. 361 refuted. 0 times theorem prover too weak. 2171 trivial. 0 not checked. [2018-09-18 12:08:00,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:00,755 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:08:00,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:00,772 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:01,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1472 proven. 872 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2018-09-18 12:08:02,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1476 proven. 2 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2018-09-18 12:08:05,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:08:05,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 5] total 25 [2018-09-18 12:08:05,256 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:08:05,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 12:08:05,257 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 12:08:05,258 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-09-18 12:08:05,258 INFO L87 Difference]: Start difference. First operand 26764 states and 28268 transitions. Second operand 13 states. [2018-09-18 12:08:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:18,269 INFO L93 Difference]: Finished difference Result 62656 states and 66369 transitions. [2018-09-18 12:08:18,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-18 12:08:18,270 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1394 [2018-09-18 12:08:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:18,345 INFO L225 Difference]: With dead ends: 62656 [2018-09-18 12:08:18,345 INFO L226 Difference]: Without dead ends: 35311 [2018-09-18 12:08:18,393 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5635 GetRequests, 5581 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2018-09-18 12:08:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35311 states. [2018-09-18 12:08:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35311 to 31338. [2018-09-18 12:08:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31338 states. [2018-09-18 12:08:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31338 states to 31338 states and 33012 transitions. [2018-09-18 12:08:18,791 INFO L78 Accepts]: Start accepts. Automaton has 31338 states and 33012 transitions. Word has length 1394 [2018-09-18 12:08:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:18,792 INFO L480 AbstractCegarLoop]: Abstraction has 31338 states and 33012 transitions. [2018-09-18 12:08:18,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 12:08:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 31338 states and 33012 transitions. [2018-09-18 12:08:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1418 [2018-09-18 12:08:18,826 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:18,827 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:08:18,828 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1765509733, now seen corresponding path program 1 times [2018-09-18 12:08:18,828 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:18,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:18,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:18,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:18,830 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 1469 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-09-18 12:08:21,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:21,772 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:08:21,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:21,779 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:22,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 1469 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-09-18 12:08:23,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 1469 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-09-18 12:08:26,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:26,664 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:08:26,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:26,680 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:27,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 2706 proven. 2 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2018-09-18 12:08:28,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 854 proven. 336 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2018-09-18 12:08:30,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:08:30,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 18 [2018-09-18 12:08:30,197 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:08:30,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-18 12:08:30,198 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-18 12:08:30,199 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-09-18 12:08:30,199 INFO L87 Difference]: Start difference. First operand 31338 states and 33012 transitions. Second operand 11 states. Received shutdown request... [2018-09-18 12:08:38,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-18 12:08:38,315 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 12:08:38,320 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 12:08:38,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:08:38 BoogieIcfgContainer [2018-09-18 12:08:38,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:08:38,321 INFO L168 Benchmark]: Toolchain (without parser) took 225276.80 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 790.9 MB. Max. memory is 7.1 GB. [2018-09-18 12:08:38,322 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:08:38,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1395.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-09-18 12:08:38,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 198.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 12:08:38,324 INFO L168 Benchmark]: Boogie Preprocessor took 463.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -958.1 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-09-18 12:08:38,325 INFO L168 Benchmark]: RCFGBuilder took 6866.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 261.2 MB). Peak memory consumption was 261.2 MB. Max. memory is 7.1 GB. [2018-09-18 12:08:38,326 INFO L168 Benchmark]: TraceAbstraction took 216345.80 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 542.4 MB. Max. memory is 7.1 GB. [2018-09-18 12:08:38,330 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1395.76 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 198.63 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 463.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 803.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -958.1 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6866.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 261.2 MB). Peak memory consumption was 261.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216345.80 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 542.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 145). Cancelled while BasicCegarLoop was constructing difference of abstraction (31338states) and FLOYD_HOARE automaton (currently 29 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (52299 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 216.2s OverallTime, 14 OverallIterations, 9 TraceHistogramMax, 129.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1715 SDtfs, 37655 SDslu, 4074 SDs, 0 SdLazy, 83643 SolverSat, 12302 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 98.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40834 GetRequests, 40407 SyntacticMatches, 41 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4202 ImplicationChecksByTransitivity, 23.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33786occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.7s AutomataMinimizationTime, 13 MinimizatonAttempts, 15973 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 59.3s InterpolantComputationTime, 31879 NumberOfCodeBlocks, 31879 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 51997 ConstructedInterpolants, 21 QuantifiedInterpolants, 191713501 SizeOfPredicates, 19 NumberOfNonLiveVariables, 26730 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 52 InterpolantComputations, 7 PerfectInterpolantSequences, 114827/121562 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/Problem16_label29_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-08-38-343.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label29_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-08-38-343.csv Completed graceful shutdown