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/Problem04_label50_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:15:43,917 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:15:43,919 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:15:43,935 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:15:43,935 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:15:43,936 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:15:43,937 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:15:43,939 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:15:43,941 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:15:43,941 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:15:43,942 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:15:43,943 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:15:43,944 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:15:43,944 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:15:43,946 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:15:43,946 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:15:43,947 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:15:43,949 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:15:43,951 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:15:43,953 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:15:43,954 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:15:43,955 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:15:43,958 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:15:43,958 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:15:43,958 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:15:43,959 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:15:43,960 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:15:43,961 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:15:43,962 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:15:43,963 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:15:43,963 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:15:43,964 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:15:43,964 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:15:43,964 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:15:43,965 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:15:43,966 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:15:43,967 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 16:15:43,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:15:43,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:15:43,994 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:15:43,994 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:15:43,994 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:15:43,995 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:15:43,995 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:15:43,995 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:15:43,995 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:15:43,995 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:15:43,995 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:15:43,996 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:15:43,996 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:15:43,997 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:15:43,997 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:15:43,997 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:15:43,997 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:15:43,997 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:15:43,997 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:15:43,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:15:43,998 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:15:43,998 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:15:43,998 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:15:43,998 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:15:43,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:15:43,999 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:15:43,999 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:15:43,999 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:15:43,999 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:15:44,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:15:44,000 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:15:44,000 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:15:44,000 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:15:44,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:15:44,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:15:44,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:15:44,072 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:15:44,072 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:15:44,073 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label50_true-unreach-call.c [2018-09-14 16:15:44,416 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c03e5c9f/f62e14da981c43b08c50ce77601cd1c7/FLAG0c3d434f9 [2018-09-14 16:15:44,914 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:15:44,915 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label50_true-unreach-call.c [2018-09-14 16:15:44,955 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c03e5c9f/f62e14da981c43b08c50ce77601cd1c7/FLAG0c3d434f9 [2018-09-14 16:15:44,972 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c03e5c9f/f62e14da981c43b08c50ce77601cd1c7 [2018-09-14 16:15:44,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:15:44,988 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:15:44,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:15:44,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:15:44,997 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:15:44,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:15:44" (1/1) ... [2018-09-14 16:15:45,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d32f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:44, skipping insertion in model container [2018-09-14 16:15:45,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:15:44" (1/1) ... [2018-09-14 16:15:45,014 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:15:46,314 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:15:46,334 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:15:47,087 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:15:47,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47 WrapperNode [2018-09-14 16:15:47,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:15:47,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:15:47,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:15:47,244 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:15:47,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,314 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:15:47,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:15:47,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:15:47,383 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:15:47,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:47,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (1/1) ... [2018-09-14 16:15:48,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:15:48,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:15:48,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:15:48,018 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:15:48,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (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 16:15:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:15:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:15:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-09-14 16:15:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-09-14 16:15:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-09-14 16:15:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-09-14 16:15:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 16:15:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 16:15:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:15:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:15:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:15:48,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:15:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:15:48,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:15:59,373 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:15:59,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:15:59 BoogieIcfgContainer [2018-09-14 16:15:59,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:15:59,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:15:59,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:15:59,378 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:15:59,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:15:44" (1/3) ... [2018-09-14 16:15:59,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169c6984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:15:59, skipping insertion in model container [2018-09-14 16:15:59,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:15:47" (2/3) ... [2018-09-14 16:15:59,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@169c6984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:15:59, skipping insertion in model container [2018-09-14 16:15:59,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:15:59" (3/3) ... [2018-09-14 16:15:59,382 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label50_true-unreach-call.c [2018-09-14 16:15:59,392 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:15:59,402 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:15:59,465 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:15:59,466 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:15:59,466 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:15:59,466 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:15:59,467 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:15:59,467 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:15:59,467 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:15:59,467 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:15:59,467 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:15:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states. [2018-09-14 16:15:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2018-09-14 16:15:59,576 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:15:59,578 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:59,579 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:15:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1716916079, now seen corresponding path program 1 times [2018-09-14 16:15:59,589 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:15:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:59,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:15:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:15:59,639 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:01,132 WARN L178 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:16:02,059 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 16:16:02,062 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:16:02,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:16:02,063 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:16:02,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:16:02,088 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:16:02,089 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:16:02,091 INFO L87 Difference]: Start difference. First operand 907 states. Second operand 3 states. [2018-09-14 16:16:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:08,942 INFO L93 Difference]: Finished difference Result 2647 states and 5102 transitions. [2018-09-14 16:16:08,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:16:08,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 829 [2018-09-14 16:16:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:08,991 INFO L225 Difference]: With dead ends: 2647 [2018-09-14 16:16:08,992 INFO L226 Difference]: Without dead ends: 1738 [2018-09-14 16:16:09,003 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 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 16:16:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2018-09-14 16:16:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1738. [2018-09-14 16:16:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2018-09-14 16:16:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 3286 transitions. [2018-09-14 16:16:09,181 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 3286 transitions. Word has length 829 [2018-09-14 16:16:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:09,184 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 3286 transitions. [2018-09-14 16:16:09,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:16:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 3286 transitions. [2018-09-14 16:16:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2018-09-14 16:16:09,220 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:09,221 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:09,222 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1438074224, now seen corresponding path program 1 times [2018-09-14 16:16:09,223 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:09,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:09,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:09,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:09,225 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:10,910 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:16:10,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:16:10,910 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:16:10,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:16:10,914 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:16:10,915 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:16:10,915 INFO L87 Difference]: Start difference. First operand 1738 states and 3286 transitions. Second operand 4 states. [2018-09-14 16:16:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:21,751 INFO L93 Difference]: Finished difference Result 6810 states and 13144 transitions. [2018-09-14 16:16:21,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:16:21,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 838 [2018-09-14 16:16:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:21,796 INFO L225 Difference]: With dead ends: 6810 [2018-09-14 16:16:21,796 INFO L226 Difference]: Without dead ends: 5078 [2018-09-14 16:16:21,807 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:16:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2018-09-14 16:16:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 5078. [2018-09-14 16:16:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5078 states. [2018-09-14 16:16:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 8559 transitions. [2018-09-14 16:16:22,129 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 8559 transitions. Word has length 838 [2018-09-14 16:16:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:22,131 INFO L480 AbstractCegarLoop]: Abstraction has 5078 states and 8559 transitions. [2018-09-14 16:16:22,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:16:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 8559 transitions. [2018-09-14 16:16:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2018-09-14 16:16:22,164 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:22,165 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:22,166 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash 957348076, now seen corresponding path program 1 times [2018-09-14 16:16:22,166 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:22,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:22,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:22,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:22,169 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:23,116 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:16:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:16:24,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:24,755 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:16:24,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:24,780 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:25,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:25,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:16:26,834 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:16:26,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-09-14 16:16:26,835 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:16:26,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:16:26,839 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:16:26,839 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:16:26,840 INFO L87 Difference]: Start difference. First operand 5078 states and 8559 transitions. Second operand 3 states. [2018-09-14 16:16:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:33,455 INFO L93 Difference]: Finished difference Result 15160 states and 26039 transitions. [2018-09-14 16:16:33,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:16:33,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 849 [2018-09-14 16:16:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:33,513 INFO L225 Difference]: With dead ends: 15160 [2018-09-14 16:16:33,513 INFO L226 Difference]: Without dead ends: 10088 [2018-09-14 16:16:33,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1708 GetRequests, 1698 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:16:33,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10088 states. [2018-09-14 16:16:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10088 to 10088. [2018-09-14 16:16:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10088 states. [2018-09-14 16:16:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 15200 transitions. [2018-09-14 16:16:33,787 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 15200 transitions. Word has length 849 [2018-09-14 16:16:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:33,790 INFO L480 AbstractCegarLoop]: Abstraction has 10088 states and 15200 transitions. [2018-09-14 16:16:33,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:16:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 15200 transitions. [2018-09-14 16:16:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-09-14 16:16:33,835 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:33,836 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:33,836 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash -102251478, now seen corresponding path program 1 times [2018-09-14 16:16:33,837 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:33,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:33,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:33,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:33,840 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 173 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-14 16:16:34,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:34,984 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 16:16:34,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:34,995 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:35,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:16:35,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:16:37,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:37,089 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 16:16:37,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:37,106 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:37,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:16:38,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-14 16:16:39,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:16:39,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-14 16:16:39,695 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:16:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:16:39,699 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:16:39,700 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:16:39,700 INFO L87 Difference]: Start difference. First operand 10088 states and 15200 transitions. Second operand 9 states. [2018-09-14 16:16:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:16:54,681 INFO L93 Difference]: Finished difference Result 31933 states and 51099 transitions. [2018-09-14 16:16:54,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-14 16:16:54,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 992 [2018-09-14 16:16:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:16:54,814 INFO L225 Difference]: With dead ends: 31933 [2018-09-14 16:16:54,814 INFO L226 Difference]: Without dead ends: 21851 [2018-09-14 16:16:54,861 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4026 GetRequests, 3984 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2018-09-14 16:16:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21851 states. [2018-09-14 16:16:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21851 to 21630. [2018-09-14 16:16:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21630 states. [2018-09-14 16:16:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21630 states to 21630 states and 29735 transitions. [2018-09-14 16:16:55,428 INFO L78 Accepts]: Start accepts. Automaton has 21630 states and 29735 transitions. Word has length 992 [2018-09-14 16:16:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:16:55,429 INFO L480 AbstractCegarLoop]: Abstraction has 21630 states and 29735 transitions. [2018-09-14 16:16:55,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:16:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 21630 states and 29735 transitions. [2018-09-14 16:16:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1047 [2018-09-14 16:16:55,523 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:16:55,524 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:55,524 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:16:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash 449917364, now seen corresponding path program 1 times [2018-09-14 16:16:55,525 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:16:55,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:55,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:55,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:16:55,527 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:16:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:55,934 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:16:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 214 proven. 83 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-09-14 16:16:56,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:56,743 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:16:56,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:56,751 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:57,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:16:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-09-14 16:16:58,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:16:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 238 proven. 62 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-09-14 16:16:58,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:16:58,897 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 16:16:58,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:16:58,915 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:16:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:16:59,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-14 16:17:00,457 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 216 proven. 80 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-09-14 16:17:01,048 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:17:01,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 13 [2018-09-14 16:17:01,049 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:17:01,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:17:01,051 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:17:01,051 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:17:01,051 INFO L87 Difference]: Start difference. First operand 21630 states and 29735 transitions. Second operand 5 states. [2018-09-14 16:17:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:17:08,288 INFO L93 Difference]: Finished difference Result 63725 states and 91552 transitions. [2018-09-14 16:17:08,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:17:08,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1046 [2018-09-14 16:17:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:17:08,459 INFO L225 Difference]: With dead ends: 63725 [2018-09-14 16:17:08,459 INFO L226 Difference]: Without dead ends: 42101 [2018-09-14 16:17:08,549 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4192 GetRequests, 4171 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:17:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42101 states. [2018-09-14 16:17:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42101 to 41921. [2018-09-14 16:17:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41921 states. [2018-09-14 16:17:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41921 states to 41921 states and 54838 transitions. [2018-09-14 16:17:09,439 INFO L78 Accepts]: Start accepts. Automaton has 41921 states and 54838 transitions. Word has length 1046 [2018-09-14 16:17:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:17:09,440 INFO L480 AbstractCegarLoop]: Abstraction has 41921 states and 54838 transitions. [2018-09-14 16:17:09,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:17:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 41921 states and 54838 transitions. [2018-09-14 16:17:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-09-14 16:17:09,576 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:17:09,577 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:17:09,577 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:17:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 835092270, now seen corresponding path program 1 times [2018-09-14 16:17:09,578 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:17:09,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:09,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:09,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:09,586 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:17:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 335 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-14 16:17:11,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:17:11,341 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) [2018-09-14 16:17:11,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:11,357 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:17:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:11,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-14 16:17:12,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 335 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-14 16:17:13,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:17:13,079 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 16:17:13,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:13,095 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:17:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:13,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-14 16:17:14,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 335 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-14 16:17:15,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:17:15,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 16:17:15,488 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:17:15,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:17:15,490 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:17:15,490 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:17:15,491 INFO L87 Difference]: Start difference. First operand 41921 states and 54838 transitions. Second operand 9 states. [2018-09-14 16:17:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:17:23,746 INFO L93 Difference]: Finished difference Result 104531 states and 143288 transitions. [2018-09-14 16:17:23,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 16:17:23,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1155 [2018-09-14 16:17:23,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:17:23,950 INFO L225 Difference]: With dead ends: 104531 [2018-09-14 16:17:23,950 INFO L226 Difference]: Without dead ends: 62616 [2018-09-14 16:17:24,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4634 GetRequests, 4614 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:17:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62616 states. [2018-09-14 16:17:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62616 to 62264. [2018-09-14 16:17:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62264 states. [2018-09-14 16:17:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62264 states to 62264 states and 78192 transitions. [2018-09-14 16:17:25,324 INFO L78 Accepts]: Start accepts. Automaton has 62264 states and 78192 transitions. Word has length 1155 [2018-09-14 16:17:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:17:25,325 INFO L480 AbstractCegarLoop]: Abstraction has 62264 states and 78192 transitions. [2018-09-14 16:17:25,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:17:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 62264 states and 78192 transitions. [2018-09-14 16:17:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1295 [2018-09-14 16:17:25,447 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:17:25,448 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:17:25,449 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:17:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2051406485, now seen corresponding path program 1 times [2018-09-14 16:17:25,449 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:17:25,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:25,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:25,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:17:25,451 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:17:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:25,929 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:17:26,288 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-14 16:17:26,549 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:17:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 461 proven. 187 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-09-14 16:17:28,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:17:28,294 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 16:17:28,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:28,301 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:17:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:28,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2018-09-14 16:17:29,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 478 proven. 144 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-14 16:17:30,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:17:30,558 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 16:17:30,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:17:30,575 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:17:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:17:31,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:17:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2018-09-14 16:17:32,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:17:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 478 proven. 144 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-14 16:17:33,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:17:33,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 18 [2018-09-14 16:17:33,505 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:17:33,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 16:17:33,508 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 16:17:33,508 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:17:33,508 INFO L87 Difference]: Start difference. First operand 62264 states and 78192 transitions. Second operand 14 states. [2018-09-14 16:18:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:18:16,584 INFO L93 Difference]: Finished difference Result 238955 states and 329370 transitions. [2018-09-14 16:18:16,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-14 16:18:16,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1294 [2018-09-14 16:18:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:18:17,134 INFO L225 Difference]: With dead ends: 238955 [2018-09-14 16:18:17,134 INFO L226 Difference]: Without dead ends: 176697 [2018-09-14 16:18:17,245 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5284 GetRequests, 5212 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=843, Invalid=3447, Unknown=0, NotChecked=0, Total=4290 [2018-09-14 16:18:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176697 states. [2018-09-14 16:18:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176697 to 174458. [2018-09-14 16:18:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174458 states. [2018-09-14 16:18:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174458 states to 174458 states and 215723 transitions. [2018-09-14 16:18:20,790 INFO L78 Accepts]: Start accepts. Automaton has 174458 states and 215723 transitions. Word has length 1294 [2018-09-14 16:18:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:18:20,791 INFO L480 AbstractCegarLoop]: Abstraction has 174458 states and 215723 transitions. [2018-09-14 16:18:20,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 16:18:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 174458 states and 215723 transitions. [2018-09-14 16:18:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1369 [2018-09-14 16:18:22,040 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:18:22,041 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:22,041 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:18:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash -639501537, now seen corresponding path program 1 times [2018-09-14 16:18:22,042 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:18:22,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:18:22,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:18:22,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:18:22,043 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:18:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:18:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 559 proven. 251 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-09-14 16:18:23,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:18:23,421 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 16:18:23,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:18:23,430 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:18:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:18:23,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:18:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 691 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-09-14 16:18:24,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:18:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 671 proven. 108 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-09-14 16:18:25,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:18:25,839 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 16:18:25,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:18:25,856 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:18:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:18:26,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:18:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 691 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-09-14 16:18:27,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:18:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 671 proven. 108 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-09-14 16:18:28,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:18:28,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-14 16:18:28,162 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:18:28,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:18:28,164 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:18:28,164 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:18:28,164 INFO L87 Difference]: Start difference. First operand 174458 states and 215723 transitions. Second operand 9 states. [2018-09-14 16:18:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:18:44,080 INFO L93 Difference]: Finished difference Result 489906 states and 625238 transitions. [2018-09-14 16:18:44,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-14 16:18:44,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1368 [2018-09-14 16:18:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:18:44,770 INFO L225 Difference]: With dead ends: 489906 [2018-09-14 16:18:44,770 INFO L226 Difference]: Without dead ends: 241453 [2018-09-14 16:18:45,090 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5521 GetRequests, 5482 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2018-09-14 16:18:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241453 states. [2018-09-14 16:18:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241453 to 239557. [2018-09-14 16:18:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239557 states. [2018-09-14 16:18:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239557 states to 239557 states and 259020 transitions. [2018-09-14 16:18:48,303 INFO L78 Accepts]: Start accepts. Automaton has 239557 states and 259020 transitions. Word has length 1368 [2018-09-14 16:18:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:18:48,304 INFO L480 AbstractCegarLoop]: Abstraction has 239557 states and 259020 transitions. [2018-09-14 16:18:48,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:18:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 239557 states and 259020 transitions. [2018-09-14 16:18:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1506 [2018-09-14 16:18:48,498 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:18:48,499 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:18:48,499 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:18:48,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1917533375, now seen corresponding path program 1 times [2018-09-14 16:18:48,500 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:18:48,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:18:48,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:18:48,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:18:48,501 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:18:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:18:49,164 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:18:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 670 proven. 578 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-14 16:18:52,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:18:52,599 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 16:18:52,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:18:52,606 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:18:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:18:53,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:18:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 1010 proven. 2 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-09-14 16:18:53,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:18:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 853 proven. 108 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-09-14 16:18:54,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:18:54,768 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 16:18:54,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:18:54,784 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:18:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:18:55,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:18:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 1007 proven. 4 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-14 16:18:56,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:18:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 850 proven. 183 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2018-09-14 16:18:57,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:18:57,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 15 [2018-09-14 16:18:57,608 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:18:57,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-14 16:18:57,610 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-14 16:18:57,610 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:18:57,611 INFO L87 Difference]: Start difference. First operand 239557 states and 259020 transitions. Second operand 11 states. [2018-09-14 16:19:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:19:12,232 INFO L93 Difference]: Finished difference Result 495124 states and 536262 transitions. [2018-09-14 16:19:12,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-14 16:19:12,232 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1505 [2018-09-14 16:19:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:19:12,770 INFO L225 Difference]: With dead ends: 495124 [2018-09-14 16:19:12,770 INFO L226 Difference]: Without dead ends: 251241 [2018-09-14 16:19:13,006 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6050 GetRequests, 6018 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:19:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251241 states. [2018-09-14 16:19:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251241 to 249202. [2018-09-14 16:19:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249202 states. [2018-09-14 16:19:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249202 states to 249202 states and 265872 transitions. [2018-09-14 16:19:16,606 INFO L78 Accepts]: Start accepts. Automaton has 249202 states and 265872 transitions. Word has length 1505 [2018-09-14 16:19:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:19:16,607 INFO L480 AbstractCegarLoop]: Abstraction has 249202 states and 265872 transitions. [2018-09-14 16:19:16,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-14 16:19:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 249202 states and 265872 transitions. [2018-09-14 16:19:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1651 [2018-09-14 16:19:16,781 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:19:16,782 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:19:16,782 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:19:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1422717429, now seen corresponding path program 1 times [2018-09-14 16:19:16,783 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:19:16,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:19:16,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:19:16,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:19:16,785 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:19:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:19:17,932 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 Received shutdown request... [2018-09-14 16:19:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 1135 proven. 333 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-09-14 16:19:25,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:19:25,083 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 16:19:25,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:19:25,096 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:19:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:19:25,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:19:25,587 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-14 16:19:25,789 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:19:25,790 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:19:25,795 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:19:25,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:19:25 BoogieIcfgContainer [2018-09-14 16:19:25,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:19:25,796 INFO L168 Benchmark]: Toolchain (without parser) took 220811.38 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.4 GB). Free memory was 1.4 GB in the beginning and 4.0 GB in the end (delta: -2.6 GB). Peak memory consumption was 818.9 MB. Max. memory is 7.1 GB. [2018-09-14 16:19:25,797 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:19:25,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2254.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. [2018-09-14 16:19:25,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 138.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:19:25,799 INFO L168 Benchmark]: Boogie Preprocessor took 634.01 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 834.7 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. [2018-09-14 16:19:25,800 INFO L168 Benchmark]: RCFGBuilder took 11356.55 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 181.9 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -178.2 MB). Peak memory consumption was 730.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:19:25,801 INFO L168 Benchmark]: TraceAbstraction took 206420.56 ms. Allocated memory was 2.5 GB in the beginning and 4.9 GB in the end (delta: 2.4 GB). Free memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 826.9 MB. Max. memory is 7.1 GB. [2018-09-14 16:19:25,812 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2254.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 138.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 634.01 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 834.7 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11356.55 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 181.9 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -178.2 MB). Peak memory consumption was 730.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206420.56 ms. Allocated memory was 2.5 GB in the beginning and 4.9 GB in the end (delta: 2.4 GB). Free memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 826.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4805]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4805). Cancelled while BasicCegarLoop was analyzing trace of length 1651 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 8 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 907 locations, 1 error locations. TIMEOUT Result, 206.3s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 131.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2080 SDtfs, 59943 SDslu, 2625 SDs, 0 SdLazy, 85093 SolverSat, 30361 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31431 GetRequests, 31187 SyntacticMatches, 47 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=249202occurred in iteration=9, 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: 13.8s AutomataMinimizationTime, 9 MinimizatonAttempts, 6927 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 30.8s InterpolantComputationTime, 25445 NumberOfCodeBlocks, 25445 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 40979 ConstructedInterpolants, 0 QuantifiedInterpolants, 75235612 SizeOfPredicates, 14 NumberOfNonLiveVariables, 21792 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 17860/20102 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/Problem04_label50_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-19-25-834.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem04_label50_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-19-25-834.csv Completed graceful shutdown