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/Problem15_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:50:24,963 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:50:24,965 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:50:24,977 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:50:24,977 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:50:24,979 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:50:24,980 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:50:24,982 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:50:24,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:50:24,987 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:50:24,988 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:50:24,989 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:50:24,991 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:50:24,992 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:50:24,993 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:50:25,000 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:50:25,001 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:50:25,005 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:50:25,007 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:50:25,011 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:50:25,012 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:50:25,013 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:50:25,015 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:50:25,016 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:50:25,016 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:50:25,018 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:50:25,019 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:50:25,020 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:50:25,020 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:50:25,023 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:50:25,023 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:50:25,024 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:50:25,024 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:50:25,025 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:50:25,025 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:50:25,026 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:50:25,027 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 17:50:25,056 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:50:25,057 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:50:25,059 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:50:25,059 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:50:25,059 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:50:25,059 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:50:25,059 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:50:25,060 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:50:25,060 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:50:25,060 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:50:25,060 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:50:25,061 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:50:25,062 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:50:25,062 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:50:25,062 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:50:25,062 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:50:25,064 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:50:25,065 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:50:25,065 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:50:25,065 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:50:25,065 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:50:25,066 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:50:25,066 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:50:25,066 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:50:25,066 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:50:25,067 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:50:25,067 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:50:25,067 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:50:25,067 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:50:25,067 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:50:25,068 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:50:25,068 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:50:25,068 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:50:25,134 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:50:25,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:50:25,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:50:25,152 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:50:25,152 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:50:25,153 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54_true-unreach-call.c [2018-09-14 17:50:25,495 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c6266c42/04e33b4b21914d87a5211d1a5edb663a/FLAG3b108115d [2018-09-14 17:50:25,891 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:50:25,892 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label54_true-unreach-call.c [2018-09-14 17:50:25,910 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c6266c42/04e33b4b21914d87a5211d1a5edb663a/FLAG3b108115d [2018-09-14 17:50:25,926 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c6266c42/04e33b4b21914d87a5211d1a5edb663a [2018-09-14 17:50:25,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:50:25,943 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:50:25,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:50:25,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:50:25,952 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:50:25,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:50:25" (1/1) ... [2018-09-14 17:50:25,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560f8b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:25, skipping insertion in model container [2018-09-14 17:50:25,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:50:25" (1/1) ... [2018-09-14 17:50:25,970 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:50:26,911 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:50:26,931 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:50:27,186 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:50:27,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27 WrapperNode [2018-09-14 17:50:27,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:50:27,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:50:27,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:50:27,345 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:50:27,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:27,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:27,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:50:27,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:50:27,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:50:27,635 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:50:28,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... [2018-09-14 17:50:28,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:50:28,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:50:28,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:50:28,239 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:50:28,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:50:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:50:28,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:50:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 17:50:28,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 17:50:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:50:28,319 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:50:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:50:28,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:50:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:50:28,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:50:36,215 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:50:36,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:50:36 BoogieIcfgContainer [2018-09-14 17:50:36,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:50:36,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:50:36,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:50:36,221 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:50:36,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:50:25" (1/3) ... [2018-09-14 17:50:36,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af55f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:50:36, skipping insertion in model container [2018-09-14 17:50:36,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:50:27" (2/3) ... [2018-09-14 17:50:36,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af55f13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:50:36, skipping insertion in model container [2018-09-14 17:50:36,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:50:36" (3/3) ... [2018-09-14 17:50:36,225 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label54_true-unreach-call.c [2018-09-14 17:50:36,233 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:50:36,242 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:50:36,300 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:50:36,301 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:50:36,301 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:50:36,301 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:50:36,302 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:50:36,302 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:50:36,302 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:50:36,302 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:50:36,302 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:50:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-09-14 17:50:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-14 17:50:36,344 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:50:36,346 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] [2018-09-14 17:50:36,347 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:50:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash -62143143, now seen corresponding path program 1 times [2018-09-14 17:50:36,355 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:50:36,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:50:36,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:50:36,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:50:36,409 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:50:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:50:36,919 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:50:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:50:37,036 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:50:37,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:50:37,037 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:50:37,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:50:37,060 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:50:37,061 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:50:37,063 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 3 states. [2018-09-14 17:50:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:50:41,757 INFO L93 Difference]: Finished difference Result 1192 states and 2147 transitions. [2018-09-14 17:50:41,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:50:41,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2018-09-14 17:50:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:50:41,786 INFO L225 Difference]: With dead ends: 1192 [2018-09-14 17:50:41,786 INFO L226 Difference]: Without dead ends: 752 [2018-09-14 17:50:41,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:50:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2018-09-14 17:50:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2018-09-14 17:50:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2018-09-14 17:50:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1322 transitions. [2018-09-14 17:50:41,924 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1322 transitions. Word has length 47 [2018-09-14 17:50:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:50:41,924 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 1322 transitions. [2018-09-14 17:50:41,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:50:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1322 transitions. [2018-09-14 17:50:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-14 17:50:41,935 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:50:41,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:50:41,936 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:50:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash -207953228, now seen corresponding path program 1 times [2018-09-14 17:50:41,940 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:50:41,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:50:41,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:50:41,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:50:41,942 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:50:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:50:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:50:42,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:50:42,265 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:50:42,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:50:42,282 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:50:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:50:42,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:50:43,092 WARN L178 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-14 17:50:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:50:43,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:50:43,539 WARN L178 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-14 17:50:43,712 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 17:50:44,108 WARN L178 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-09-14 17:50:44,593 WARN L178 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-09-14 17:50:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:50:45,009 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:50:45,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-09-14 17:50:45,010 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:50:45,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:50:45,011 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:50:45,011 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:50:45,011 INFO L87 Difference]: Start difference. First operand 752 states and 1322 transitions. Second operand 5 states. [2018-09-14 17:51:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:51:00,575 INFO L93 Difference]: Finished difference Result 2473 states and 4412 transitions. [2018-09-14 17:51:00,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:51:00,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2018-09-14 17:51:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:51:00,591 INFO L225 Difference]: With dead ends: 2473 [2018-09-14 17:51:00,591 INFO L226 Difference]: Without dead ends: 1727 [2018-09-14 17:51:00,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:51:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2018-09-14 17:51:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1714. [2018-09-14 17:51:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1714 states. [2018-09-14 17:51:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2785 transitions. [2018-09-14 17:51:00,675 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2785 transitions. Word has length 128 [2018-09-14 17:51:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:51:00,676 INFO L480 AbstractCegarLoop]: Abstraction has 1714 states and 2785 transitions. [2018-09-14 17:51:00,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:51:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2785 transitions. [2018-09-14 17:51:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-14 17:51:00,682 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:51:00,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:51:00,683 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:51:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1223945603, now seen corresponding path program 1 times [2018-09-14 17:51:00,683 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:51:00,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:51:00,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:00,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:51:00,685 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:51:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:00,901 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:51:00,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 17:51:00,901 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:51:00,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:51:00,902 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:51:00,902 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 17:51:00,903 INFO L87 Difference]: Start difference. First operand 1714 states and 2785 transitions. Second operand 5 states. [2018-09-14 17:51:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:51:10,297 INFO L93 Difference]: Finished difference Result 4453 states and 7646 transitions. [2018-09-14 17:51:10,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:51:10,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2018-09-14 17:51:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:51:10,326 INFO L225 Difference]: With dead ends: 4453 [2018-09-14 17:51:10,326 INFO L226 Difference]: Without dead ends: 3056 [2018-09-14 17:51:10,333 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:51:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2018-09-14 17:51:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2940. [2018-09-14 17:51:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2940 states. [2018-09-14 17:51:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 4360 transitions. [2018-09-14 17:51:10,441 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 4360 transitions. Word has length 164 [2018-09-14 17:51:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:51:10,442 INFO L480 AbstractCegarLoop]: Abstraction has 2940 states and 4360 transitions. [2018-09-14 17:51:10,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:51:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 4360 transitions. [2018-09-14 17:51:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-14 17:51:10,448 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:51:10,448 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:51:10,450 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:51:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash 389944670, now seen corresponding path program 1 times [2018-09-14 17:51:10,450 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:51:10,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:51:10,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:10,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:51:10,452 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:51:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:11,593 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 17:51:11,904 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-09-14 17:51:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:12,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:51:12,040 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:51:12,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:12,050 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:51:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:12,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:51:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 135 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:12,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:51:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:12,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:51:12,948 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:51:12,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:12,965 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:51:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:13,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:51:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-09-14 17:51:13,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:51:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:13,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:51:13,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-09-14 17:51:13,934 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:51:13,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 17:51:13,936 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 17:51:13,936 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:51:13,938 INFO L87 Difference]: Start difference. First operand 2940 states and 4360 transitions. Second operand 14 states. [2018-09-14 17:51:15,118 WARN L178 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2018-09-14 17:51:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:51:44,490 INFO L93 Difference]: Finished difference Result 12704 states and 19902 transitions. [2018-09-14 17:51:44,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-14 17:51:44,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 224 [2018-09-14 17:51:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:51:44,548 INFO L225 Difference]: With dead ends: 12704 [2018-09-14 17:51:44,549 INFO L226 Difference]: Without dead ends: 9444 [2018-09-14 17:51:44,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 882 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2018-09-14 17:51:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2018-09-14 17:51:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 7295. [2018-09-14 17:51:44,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7295 states. [2018-09-14 17:51:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 10510 transitions. [2018-09-14 17:51:44,794 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 10510 transitions. Word has length 224 [2018-09-14 17:51:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:51:44,795 INFO L480 AbstractCegarLoop]: Abstraction has 7295 states and 10510 transitions. [2018-09-14 17:51:44,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 17:51:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 10510 transitions. [2018-09-14 17:51:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-14 17:51:44,801 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:51:44,802 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:51:44,802 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:51:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash -323235175, now seen corresponding path program 1 times [2018-09-14 17:51:44,802 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:51:44,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:51:44,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:44,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:51:44,804 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:51:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:45,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:51:45,313 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:51:45,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:45,323 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:51:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:45,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:51:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 135 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:45,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:51:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:46,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:51:46,410 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 [2018-09-14 17:51:46,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:51:46,425 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:51:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:51:46,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:51:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-09-14 17:51:46,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:51:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 85 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:51:47,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:51:47,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-09-14 17:51:47,401 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:51:47,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 17:51:47,402 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 17:51:47,402 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:51:47,403 INFO L87 Difference]: Start difference. First operand 7295 states and 10510 transitions. Second operand 14 states. [2018-09-14 17:52:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:52:16,384 INFO L93 Difference]: Finished difference Result 17374 states and 24906 transitions. [2018-09-14 17:52:16,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-14 17:52:16,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 309 [2018-09-14 17:52:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:52:16,430 INFO L225 Difference]: With dead ends: 17374 [2018-09-14 17:52:16,431 INFO L226 Difference]: Without dead ends: 9758 [2018-09-14 17:52:16,461 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1219 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2018-09-14 17:52:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2018-09-14 17:52:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 7275. [2018-09-14 17:52:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7275 states. [2018-09-14 17:52:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 10327 transitions. [2018-09-14 17:52:16,667 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 10327 transitions. Word has length 309 [2018-09-14 17:52:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:52:16,667 INFO L480 AbstractCegarLoop]: Abstraction has 7275 states and 10327 transitions. [2018-09-14 17:52:16,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 17:52:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 10327 transitions. [2018-09-14 17:52:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-14 17:52:16,676 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:52:16,676 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:52:16,677 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:52:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1217084529, now seen corresponding path program 1 times [2018-09-14 17:52:16,677 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:52:16,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:16,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:16,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:16,678 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:52:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-14 17:52:17,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:52:17,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:52:17,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:17,143 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:52:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:17,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:52:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:52:17,517 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:52:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:52:17,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:52:17,802 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:52:17,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:17,818 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:52:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:18,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:52:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-14 17:52:18,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:52:18,969 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-14 17:52:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-14 17:52:19,739 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 17:52:19,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5, 5, 5] total 17 [2018-09-14 17:52:19,739 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:52:19,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:52:19,740 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:52:19,742 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-09-14 17:52:19,743 INFO L87 Difference]: Start difference. First operand 7275 states and 10327 transitions. Second operand 5 states. [2018-09-14 17:52:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:52:25,473 INFO L93 Difference]: Finished difference Result 18702 states and 26998 transitions. [2018-09-14 17:52:25,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 17:52:25,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 366 [2018-09-14 17:52:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:52:25,514 INFO L225 Difference]: With dead ends: 18702 [2018-09-14 17:52:25,514 INFO L226 Difference]: Without dead ends: 11744 [2018-09-14 17:52:25,543 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1456 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:52:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11744 states. [2018-09-14 17:52:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11744 to 11729. [2018-09-14 17:52:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11729 states. [2018-09-14 17:52:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 16328 transitions. [2018-09-14 17:52:25,793 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 16328 transitions. Word has length 366 [2018-09-14 17:52:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:52:25,794 INFO L480 AbstractCegarLoop]: Abstraction has 11729 states and 16328 transitions. [2018-09-14 17:52:25,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:52:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 16328 transitions. [2018-09-14 17:52:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2018-09-14 17:52:25,813 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:52:25,813 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:52:25,814 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:52:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1782501113, now seen corresponding path program 1 times [2018-09-14 17:52:25,814 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:52:25,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:25,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:25,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:25,815 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:52:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-14 17:52:26,449 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:52:26,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:52:26,450 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:52:26,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:52:26,451 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:52:26,451 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:52:26,451 INFO L87 Difference]: Start difference. First operand 11729 states and 16328 transitions. Second operand 3 states. [2018-09-14 17:52:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:52:29,337 INFO L93 Difference]: Finished difference Result 26581 states and 37694 transitions. [2018-09-14 17:52:29,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:52:29,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2018-09-14 17:52:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:52:29,386 INFO L225 Difference]: With dead ends: 26581 [2018-09-14 17:52:29,386 INFO L226 Difference]: Without dead ends: 14549 [2018-09-14 17:52:29,433 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:52:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14549 states. [2018-09-14 17:52:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14549 to 14502. [2018-09-14 17:52:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14502 states. [2018-09-14 17:52:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 19646 transitions. [2018-09-14 17:52:29,693 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 19646 transitions. Word has length 479 [2018-09-14 17:52:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:52:29,694 INFO L480 AbstractCegarLoop]: Abstraction has 14502 states and 19646 transitions. [2018-09-14 17:52:29,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:52:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 19646 transitions. [2018-09-14 17:52:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-09-14 17:52:29,721 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:52:29,721 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:52:29,722 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:52:29,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1547875672, now seen corresponding path program 1 times [2018-09-14 17:52:29,722 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:52:29,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:29,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:29,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:29,724 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:52:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:52:30,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:52:30,534 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:52:30,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:30,548 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:52:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:30,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:52:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:52:31,235 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:52:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:52:31,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:52:31,525 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:52:31,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:31,541 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:52:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:31,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:52:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:52:32,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:52:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:52:32,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:52:32,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-14 17:52:32,484 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:52:32,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:52:32,486 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:52:32,487 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:52:32,487 INFO L87 Difference]: Start difference. First operand 14502 states and 19646 transitions. Second operand 9 states. [2018-09-14 17:52:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:52:48,179 INFO L93 Difference]: Finished difference Result 35603 states and 51093 transitions. [2018-09-14 17:52:48,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-14 17:52:48,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 522 [2018-09-14 17:52:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:52:48,263 INFO L225 Difference]: With dead ends: 35603 [2018-09-14 17:52:48,264 INFO L226 Difference]: Without dead ends: 21415 [2018-09-14 17:52:48,322 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2116 GetRequests, 2089 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-09-14 17:52:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21415 states. [2018-09-14 17:52:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21415 to 20297. [2018-09-14 17:52:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20297 states. [2018-09-14 17:52:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20297 states to 20297 states and 25897 transitions. [2018-09-14 17:52:48,762 INFO L78 Accepts]: Start accepts. Automaton has 20297 states and 25897 transitions. Word has length 522 [2018-09-14 17:52:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:52:48,763 INFO L480 AbstractCegarLoop]: Abstraction has 20297 states and 25897 transitions. [2018-09-14 17:52:48,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:52:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 20297 states and 25897 transitions. [2018-09-14 17:52:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2018-09-14 17:52:48,820 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:52:48,821 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:52:48,821 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:52:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1947868185, now seen corresponding path program 1 times [2018-09-14 17:52:48,821 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:52:48,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:48,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:48,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:52:48,823 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:52:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:49,665 WARN L178 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-09-14 17:52:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 218 proven. 141 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-09-14 17:52:50,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:52:50,340 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:52:50,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:50,347 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:52:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:50,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:52:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 456 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-09-14 17:52:50,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:52:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 235 proven. 111 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-09-14 17:52:51,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:52:51,278 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:52:51,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:52:51,295 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:52:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:52:51,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:52:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-14 17:52:51,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:52:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 128 proven. 257 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 17:52:52,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:52:52,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 19 [2018-09-14 17:52:52,696 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:52:52,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 17:52:52,698 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 17:52:52,699 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:52:52,699 INFO L87 Difference]: Start difference. First operand 20297 states and 25897 transitions. Second operand 15 states. [2018-09-14 17:53:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:53:19,192 INFO L93 Difference]: Finished difference Result 44475 states and 59705 transitions. [2018-09-14 17:53:19,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-14 17:53:19,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 552 [2018-09-14 17:53:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:53:19,288 INFO L225 Difference]: With dead ends: 44475 [2018-09-14 17:53:19,288 INFO L226 Difference]: Without dead ends: 24492 [2018-09-14 17:53:19,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2319 GetRequests, 2246 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2018-09-14 17:53:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24492 states. [2018-09-14 17:53:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24492 to 22857. [2018-09-14 17:53:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22857 states. [2018-09-14 17:53:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22857 states to 22857 states and 27360 transitions. [2018-09-14 17:53:19,890 INFO L78 Accepts]: Start accepts. Automaton has 22857 states and 27360 transitions. Word has length 552 [2018-09-14 17:53:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:53:19,891 INFO L480 AbstractCegarLoop]: Abstraction has 22857 states and 27360 transitions. [2018-09-14 17:53:19,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 17:53:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 22857 states and 27360 transitions. [2018-09-14 17:53:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-09-14 17:53:19,913 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:53:19,914 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:53:19,915 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:53:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1963029028, now seen corresponding path program 1 times [2018-09-14 17:53:19,915 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:53:19,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:53:19,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:53:19,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:53:19,916 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:53:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:53:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 292 proven. 80 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-09-14 17:53:20,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:53:20,867 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:53:20,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:53:20,884 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:53:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:53:21,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:53:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 408 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-09-14 17:53:21,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:53:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 292 proven. 80 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-09-14 17:53:21,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:53:21,743 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:53:21,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:53:21,759 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:53:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:53:22,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:53:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 408 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-09-14 17:53:22,384 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:53:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 292 proven. 80 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-09-14 17:53:22,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:53:22,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-14 17:53:22,639 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:53:22,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:53:22,641 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:53:22,641 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:53:22,641 INFO L87 Difference]: Start difference. First operand 22857 states and 27360 transitions. Second operand 9 states. [2018-09-14 17:53:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:53:33,132 INFO L93 Difference]: Finished difference Result 46943 states and 58701 transitions. [2018-09-14 17:53:33,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-14 17:53:33,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 572 [2018-09-14 17:53:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:53:33,224 INFO L225 Difference]: With dead ends: 46943 [2018-09-14 17:53:33,224 INFO L226 Difference]: Without dead ends: 24830 [2018-09-14 17:53:33,273 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2318 GetRequests, 2290 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:53:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24830 states. [2018-09-14 17:53:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24830 to 24722. [2018-09-14 17:53:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24722 states. [2018-09-14 17:53:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24722 states to 24722 states and 31143 transitions. [2018-09-14 17:53:33,781 INFO L78 Accepts]: Start accepts. Automaton has 24722 states and 31143 transitions. Word has length 572 [2018-09-14 17:53:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:53:33,781 INFO L480 AbstractCegarLoop]: Abstraction has 24722 states and 31143 transitions. [2018-09-14 17:53:33,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:53:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 24722 states and 31143 transitions. [2018-09-14 17:53:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-09-14 17:53:33,802 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:53:33,802 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:53:33,803 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:53:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -890894839, now seen corresponding path program 1 times [2018-09-14 17:53:33,803 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:53:33,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:53:33,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:53:33,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:53:33,804 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:53:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:53:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 388 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-14 17:53:34,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:53:34,438 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:53:34,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:53:34,446 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:53:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:53:34,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:53:37,119 WARN L178 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 398 DAG size of output: 19 [2018-09-14 17:53:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2018-09-14 17:53:37,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:53:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2018-09-14 17:53:37,839 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:53:37,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-14 17:53:37,840 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:53:37,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:53:37,841 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:53:37,841 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:53:37,841 INFO L87 Difference]: Start difference. First operand 24722 states and 31143 transitions. Second operand 3 states. [2018-09-14 17:54:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:54:25,092 INFO L93 Difference]: Finished difference Result 56986 states and 74051 transitions. [2018-09-14 17:54:25,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:54:25,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 589 [2018-09-14 17:54:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:54:25,193 INFO L225 Difference]: With dead ends: 56986 [2018-09-14 17:54:25,193 INFO L226 Difference]: Without dead ends: 33008 [2018-09-14 17:54:25,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1183 GetRequests, 1176 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:54:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33008 states. [2018-09-14 17:54:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33008 to 32337. [2018-09-14 17:54:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32337 states. [2018-09-14 17:54:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32337 states to 32337 states and 41065 transitions. [2018-09-14 17:54:25,951 INFO L78 Accepts]: Start accepts. Automaton has 32337 states and 41065 transitions. Word has length 589 [2018-09-14 17:54:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:54:25,952 INFO L480 AbstractCegarLoop]: Abstraction has 32337 states and 41065 transitions. [2018-09-14 17:54:25,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:54:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 32337 states and 41065 transitions. [2018-09-14 17:54:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-09-14 17:54:25,969 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:54:25,969 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:54:25,970 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:54:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash -224377084, now seen corresponding path program 1 times [2018-09-14 17:54:25,970 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:54:25,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:54:25,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:54:25,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:54:25,971 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:54:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:54:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-09-14 17:54:27,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:54:27,019 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:54:27,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:54:27,027 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:54:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:54:27,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-14 17:54:33,309 WARN L186 SmtUtils]: Removed 2 from assertion stack [2018-09-14 17:54:33,310 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-14 17:54:33,511 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:54:33,511 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:54:33,517 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:54:33,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:54:33 BoogieIcfgContainer [2018-09-14 17:54:33,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:54:33,519 INFO L168 Benchmark]: Toolchain (without parser) took 247578.44 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.8 GB). Peak memory consumption was 452.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:54:33,520 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:54:33,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1399.31 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-09-14 17:54:33,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 289.66 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: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-09-14 17:54:33,522 INFO L168 Benchmark]: Boogie Preprocessor took 604.43 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 899.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-09-14 17:54:33,523 INFO L168 Benchmark]: RCFGBuilder took 7977.21 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 298.3 MB). Peak memory consumption was 298.3 MB. Max. memory is 7.1 GB. [2018-09-14 17:54:33,524 INFO L168 Benchmark]: TraceAbstraction took 237300.91 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.4 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 169.4 MB. Max. memory is 7.1 GB. [2018-09-14 17:54:33,529 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1399.31 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 289.66 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: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 604.43 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 899.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7977.21 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 298.3 MB). Peak memory consumption was 298.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237300.91 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.4 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 169.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 127). Cancelled while BasicCegarLoop was analyzing trace of length 598 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 39. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 237.2s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 198.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3110 SDtfs, 31963 SDslu, 3824 SDs, 0 SdLazy, 48591 SolverSat, 10910 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 178.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11898 GetRequests, 11619 SyntacticMatches, 34 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32337occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 8355 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 21.5s InterpolantComputationTime, 9759 NumberOfCodeBlocks, 9759 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 15527 ConstructedInterpolants, 45 QuantifiedInterpolants, 27305155 SizeOfPredicates, 38 NumberOfNonLiveVariables, 8574 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 39 InterpolantComputations, 8 PerfectInterpolantSequences, 10134/11431 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/Problem15_label54_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-54-33-551.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label54_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-54-33-551.csv Completed graceful shutdown