java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:00:17,869 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:00:17,872 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:00:17,888 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:00:17,889 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:00:17,890 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:00:17,892 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:00:17,894 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:00:17,897 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:00:17,898 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:00:17,906 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:00:17,907 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:00:17,907 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:00:17,908 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:00:17,911 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:00:17,912 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:00:17,913 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:00:17,916 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:00:17,920 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:00:17,921 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:00:17,922 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:00:17,926 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:00:17,929 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:00:17,930 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:00:17,930 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:00:17,931 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:00:17,932 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:00:17,933 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:00:17,934 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:00:17,936 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:00:17,936 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:00:17,938 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:00:17,938 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:00:17,939 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:00:17,940 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:00:17,941 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:00:17,942 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 16:00:17,970 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:00:17,970 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:00:17,971 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:00:17,971 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:00:17,972 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:00:17,972 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:00:17,972 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:00:17,972 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:00:17,972 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:00:17,973 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:00:17,973 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:00:17,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:00:17,975 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:00:17,975 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:00:17,975 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:00:17,976 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:00:17,976 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:00:17,977 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:00:17,977 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:00:17,977 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:00:17,977 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:00:17,977 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:00:17,977 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:00:17,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:17,978 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:00:17,978 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:00:17,978 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:00:17,979 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:00:17,980 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:00:17,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:00:17,980 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:00:17,980 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:00:17,980 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:00:18,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:00:18,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:00:18,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:00:18,044 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:00:18,044 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:00:18,045 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-09-14 16:00:18,376 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2530033/be6f7e7a01794a828373c6dcb9a6c89f/FLAGf3b4e9405 [2018-09-14 16:00:18,788 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:00:18,789 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-09-14 16:00:18,808 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2530033/be6f7e7a01794a828373c6dcb9a6c89f/FLAGf3b4e9405 [2018-09-14 16:00:18,824 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2530033/be6f7e7a01794a828373c6dcb9a6c89f [2018-09-14 16:00:18,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:00:18,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:00:18,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:18,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:00:18,850 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:00:18,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:18" (1/1) ... [2018-09-14 16:00:18,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf4fa99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:18, skipping insertion in model container [2018-09-14 16:00:18,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:18" (1/1) ... [2018-09-14 16:00:18,869 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:00:19,611 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:19,630 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:00:19,888 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:19,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19 WrapperNode [2018-09-14 16:00:19,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:19,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:19,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:00:19,966 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:00:19,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:20,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:00:20,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:00:20,106 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:00:20,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (1/1) ... [2018-09-14 16:00:20,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:00:20,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:00:20,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:00:20,503 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:00:20,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (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 16:00:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:00:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:00:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:00:20,579 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:00:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:00:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:00:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:00:20,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:00:25,589 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:00:25,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:25 BoogieIcfgContainer [2018-09-14 16:00:25,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:00:25,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:00:25,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:00:25,595 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:00:25,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:00:18" (1/3) ... [2018-09-14 16:00:25,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d49b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:25, skipping insertion in model container [2018-09-14 16:00:25,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:19" (2/3) ... [2018-09-14 16:00:25,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d49b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:25, skipping insertion in model container [2018-09-14 16:00:25,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:25" (3/3) ... [2018-09-14 16:00:25,600 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12_true-unreach-call.c [2018-09-14 16:00:25,611 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:00:25,620 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:00:25,678 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:00:25,679 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:00:25,679 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:00:25,680 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:00:25,680 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:00:25,680 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:00:25,680 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:00:25,680 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:00:25,680 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:00:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:00:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-14 16:00:25,729 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:25,730 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] [2018-09-14 16:00:25,732 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -927745007, now seen corresponding path program 1 times [2018-09-14 16:00:25,741 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:25,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:25,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:25,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:25,803 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:26,704 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:26,900 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 16:00:26,903 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:26,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:26,903 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:26,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:26,926 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:26,927 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:26,930 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:00:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:29,131 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-09-14 16:00:29,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:29,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-09-14 16:00:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:29,160 INFO L225 Difference]: With dead ends: 845 [2018-09-14 16:00:29,160 INFO L226 Difference]: Without dead ends: 531 [2018-09-14 16:00:29,168 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-14 16:00:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-09-14 16:00:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-09-14 16:00:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-09-14 16:00:29,267 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 170 [2018-09-14 16:00:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:29,268 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-09-14 16:00:29,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-09-14 16:00:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-14 16:00:29,275 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:29,276 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:29,276 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1807947448, now seen corresponding path program 1 times [2018-09-14 16:00:29,277 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:29,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:29,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:29,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:29,279 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:29,589 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:29,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:29,589 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:29,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:29,591 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:29,591 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:29,592 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-09-14 16:00:33,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:33,431 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-09-14 16:00:33,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:00:33,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-09-14 16:00:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:33,444 INFO L225 Difference]: With dead ends: 1599 [2018-09-14 16:00:33,445 INFO L226 Difference]: Without dead ends: 1075 [2018-09-14 16:00:33,448 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-09-14 16:00:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-09-14 16:00:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-09-14 16:00:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-09-14 16:00:33,514 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 180 [2018-09-14 16:00:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:33,515 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-09-14 16:00:33,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-09-14 16:00:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-14 16:00:33,519 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:33,520 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:33,520 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:33,520 INFO L82 PathProgramCache]: Analyzing trace with hash 479453333, now seen corresponding path program 1 times [2018-09-14 16:00:33,520 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:33,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:33,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:33,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:33,522 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:33,896 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:33,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:33,897 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:33,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:33,899 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:33,900 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:33,900 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-09-14 16:00:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:36,477 INFO L93 Difference]: Finished difference Result 2912 states and 4936 transitions. [2018-09-14 16:00:36,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:36,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-09-14 16:00:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:36,504 INFO L225 Difference]: With dead ends: 2912 [2018-09-14 16:00:36,504 INFO L226 Difference]: Without dead ends: 1884 [2018-09-14 16:00:36,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-14 16:00:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1881. [2018-09-14 16:00:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2018-09-14 16:00:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2981 transitions. [2018-09-14 16:00:36,593 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2981 transitions. Word has length 183 [2018-09-14 16:00:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:36,594 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2981 transitions. [2018-09-14 16:00:36,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2981 transitions. [2018-09-14 16:00:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-14 16:00:36,603 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:36,603 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:36,603 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1957803305, now seen corresponding path program 1 times [2018-09-14 16:00:36,604 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:36,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:36,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:36,605 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:36,958 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:36,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-14 16:00:36,959 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:36,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:00:36,959 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:00:36,960 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:36,960 INFO L87 Difference]: Start difference. First operand 1881 states and 2981 transitions. Second operand 7 states. [2018-09-14 16:00:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:39,395 INFO L93 Difference]: Finished difference Result 5729 states and 9791 transitions. [2018-09-14 16:00:39,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:00:39,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2018-09-14 16:00:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:39,438 INFO L225 Difference]: With dead ends: 5729 [2018-09-14 16:00:39,438 INFO L226 Difference]: Without dead ends: 3854 [2018-09-14 16:00:39,447 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2018-09-14 16:00:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3744. [2018-09-14 16:00:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2018-09-14 16:00:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 6108 transitions. [2018-09-14 16:00:39,709 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 6108 transitions. Word has length 189 [2018-09-14 16:00:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:39,709 INFO L480 AbstractCegarLoop]: Abstraction has 3744 states and 6108 transitions. [2018-09-14 16:00:39,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:00:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 6108 transitions. [2018-09-14 16:00:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-14 16:00:39,722 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:39,722 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] [2018-09-14 16:00:39,722 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -551348028, now seen corresponding path program 1 times [2018-09-14 16:00:39,723 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:39,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:39,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:39,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:39,724 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:39,968 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:40,342 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 16:00:40,342 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:40,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:40,342 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:40,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:40,343 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:40,344 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:40,344 INFO L87 Difference]: Start difference. First operand 3744 states and 6108 transitions. Second operand 6 states. [2018-09-14 16:00:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:42,505 INFO L93 Difference]: Finished difference Result 8125 states and 13602 transitions. [2018-09-14 16:00:42,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:00:42,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2018-09-14 16:00:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:42,528 INFO L225 Difference]: With dead ends: 8125 [2018-09-14 16:00:42,528 INFO L226 Difference]: Without dead ends: 4387 [2018-09-14 16:00:42,544 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2018-09-14 16:00:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4215. [2018-09-14 16:00:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2018-09-14 16:00:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6296 transitions. [2018-09-14 16:00:42,668 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6296 transitions. Word has length 190 [2018-09-14 16:00:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:42,669 INFO L480 AbstractCegarLoop]: Abstraction has 4215 states and 6296 transitions. [2018-09-14 16:00:42,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6296 transitions. [2018-09-14 16:00:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-14 16:00:42,681 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:42,682 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:42,682 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1721729602, now seen corresponding path program 1 times [2018-09-14 16:00:42,683 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:42,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:42,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:42,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:42,684 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:42,966 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:43,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:43,129 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 16:00:43,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:43,139 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:43,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:00:43,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:00:43,893 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:00:43,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-09-14 16:00:43,894 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:43,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:43,894 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:43,894 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:43,895 INFO L87 Difference]: Start difference. First operand 4215 states and 6296 transitions. Second operand 3 states. [2018-09-14 16:00:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:44,765 INFO L93 Difference]: Finished difference Result 8422 states and 12588 transitions. [2018-09-14 16:00:44,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:44,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2018-09-14 16:00:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:44,785 INFO L225 Difference]: With dead ends: 8422 [2018-09-14 16:00:44,786 INFO L226 Difference]: Without dead ends: 4213 [2018-09-14 16:00:44,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2018-09-14 16:00:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4213. [2018-09-14 16:00:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4213 states. [2018-09-14 16:00:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 6292 transitions. [2018-09-14 16:00:44,907 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 6292 transitions. Word has length 194 [2018-09-14 16:00:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:44,908 INFO L480 AbstractCegarLoop]: Abstraction has 4213 states and 6292 transitions. [2018-09-14 16:00:44,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 6292 transitions. [2018-09-14 16:00:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-09-14 16:00:44,919 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:44,920 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:44,920 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1241817260, now seen corresponding path program 1 times [2018-09-14 16:00:44,921 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:44,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:44,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:44,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:44,928 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:45,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:45,405 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 16:00:45,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:45,421 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:45,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:45,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:46,062 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:00:46,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:00:46,062 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:46,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:46,063 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:46,063 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:46,064 INFO L87 Difference]: Start difference. First operand 4213 states and 6292 transitions. Second operand 3 states. [2018-09-14 16:00:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:48,656 INFO L93 Difference]: Finished difference Result 12317 states and 18981 transitions. [2018-09-14 16:00:48,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:48,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2018-09-14 16:00:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:48,709 INFO L225 Difference]: With dead ends: 12317 [2018-09-14 16:00:48,712 INFO L226 Difference]: Without dead ends: 8110 [2018-09-14 16:00:48,730 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 400 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8110 states. [2018-09-14 16:00:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8110 to 7965. [2018-09-14 16:00:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7965 states. [2018-09-14 16:00:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 12011 transitions. [2018-09-14 16:00:48,949 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 12011 transitions. Word has length 201 [2018-09-14 16:00:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 7965 states and 12011 transitions. [2018-09-14 16:00:48,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 12011 transitions. [2018-09-14 16:00:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-14 16:00:48,971 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:48,971 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:48,971 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2073570488, now seen corresponding path program 1 times [2018-09-14 16:00:48,972 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:48,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:48,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:48,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:48,973 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:49,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:49,457 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:49,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:49,475 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:49,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:50,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:50,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:50,547 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:00:50,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:50,575 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:50,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:51,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:51,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:00:51,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 18 [2018-09-14 16:00:51,632 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:00:51,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:00:51,633 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:00:51,633 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:00:51,634 INFO L87 Difference]: Start difference. First operand 7965 states and 12011 transitions. Second operand 9 states. [2018-09-14 16:01:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:05,463 INFO L93 Difference]: Finished difference Result 66058 states and 136488 transitions. [2018-09-14 16:01:05,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-14 16:01:05,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 203 [2018-09-14 16:01:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:05,944 INFO L225 Difference]: With dead ends: 66058 [2018-09-14 16:01:05,944 INFO L226 Difference]: Without dead ends: 58099 [2018-09-14 16:01:06,117 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 828 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2018-09-14 16:01:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58099 states. [2018-09-14 16:01:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58099 to 55162. [2018-09-14 16:01:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55162 states. [2018-09-14 16:01:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55162 states to 55162 states and 79096 transitions. [2018-09-14 16:01:08,884 INFO L78 Accepts]: Start accepts. Automaton has 55162 states and 79096 transitions. Word has length 203 [2018-09-14 16:01:08,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:08,885 INFO L480 AbstractCegarLoop]: Abstraction has 55162 states and 79096 transitions. [2018-09-14 16:01:08,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:01:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 55162 states and 79096 transitions. [2018-09-14 16:01:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-14 16:01:09,019 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:09,019 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:09,019 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash -652409198, now seen corresponding path program 1 times [2018-09-14 16:01:09,020 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:09,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:09,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:09,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:09,021 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:09,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:09,542 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-14 16:01:09,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:09,556 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:09,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:09,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:01:10,072 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:01:10,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-14 16:01:10,073 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:10,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:01:10,074 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:01:10,074 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:01:10,074 INFO L87 Difference]: Start difference. First operand 55162 states and 79096 transitions. Second operand 3 states. [2018-09-14 16:01:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:12,181 INFO L93 Difference]: Finished difference Result 107758 states and 153453 transitions. [2018-09-14 16:01:12,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:01:12,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2018-09-14 16:01:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:12,465 INFO L225 Difference]: With dead ends: 107758 [2018-09-14 16:01:12,465 INFO L226 Difference]: Without dead ends: 65980 [2018-09-14 16:01:12,578 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:01:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65980 states. [2018-09-14 16:01:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65980 to 64455. [2018-09-14 16:01:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64455 states. [2018-09-14 16:01:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64455 states to 64455 states and 91904 transitions. [2018-09-14 16:01:14,656 INFO L78 Accepts]: Start accepts. Automaton has 64455 states and 91904 transitions. Word has length 224 [2018-09-14 16:01:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:14,657 INFO L480 AbstractCegarLoop]: Abstraction has 64455 states and 91904 transitions. [2018-09-14 16:01:14,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:01:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 64455 states and 91904 transitions. [2018-09-14 16:01:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-14 16:01:14,732 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:14,733 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:14,733 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -594808354, now seen corresponding path program 1 times [2018-09-14 16:01:14,734 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:14,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:14,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:14,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:14,735 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:15,031 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:01:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:15,442 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:01:15,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:01:15,442 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:15,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:01:15,443 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:01:15,443 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:01:15,444 INFO L87 Difference]: Start difference. First operand 64455 states and 91904 transitions. Second operand 6 states. [2018-09-14 16:01:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:18,273 INFO L93 Difference]: Finished difference Result 126056 states and 182154 transitions. [2018-09-14 16:01:18,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:01:18,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 234 [2018-09-14 16:01:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:18,537 INFO L225 Difference]: With dead ends: 126056 [2018-09-14 16:01:18,538 INFO L226 Difference]: Without dead ends: 61642 [2018-09-14 16:01:18,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:01:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61642 states. [2018-09-14 16:01:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61642 to 60920. [2018-09-14 16:01:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60920 states. [2018-09-14 16:01:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60920 states to 60920 states and 79562 transitions. [2018-09-14 16:01:20,875 INFO L78 Accepts]: Start accepts. Automaton has 60920 states and 79562 transitions. Word has length 234 [2018-09-14 16:01:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:20,876 INFO L480 AbstractCegarLoop]: Abstraction has 60920 states and 79562 transitions. [2018-09-14 16:01:20,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:01:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 60920 states and 79562 transitions. [2018-09-14 16:01:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-14 16:01:20,932 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:20,933 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:20,933 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:20,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1451111353, now seen corresponding path program 1 times [2018-09-14 16:01:20,934 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:20,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:20,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:20,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:20,935 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:21,548 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:01:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:21,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:21,802 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:21,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:21,819 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:22,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:01:22,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 66 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:01:23,129 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:01:23,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:01:23,129 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:01:23,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:01:23,130 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:01:23,130 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:01:23,131 INFO L87 Difference]: Start difference. First operand 60920 states and 79562 transitions. Second operand 5 states. [2018-09-14 16:01:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:26,263 INFO L93 Difference]: Finished difference Result 125115 states and 167511 transitions. [2018-09-14 16:01:26,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:01:26,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2018-09-14 16:01:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:26,496 INFO L225 Difference]: With dead ends: 125115 [2018-09-14 16:01:26,497 INFO L226 Difference]: Without dead ends: 64271 [2018-09-14 16:01:27,592 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:01:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64271 states. [2018-09-14 16:01:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64271 to 63395. [2018-09-14 16:01:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63395 states. [2018-09-14 16:01:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63395 states to 63395 states and 81031 transitions. [2018-09-14 16:01:28,849 INFO L78 Accepts]: Start accepts. Automaton has 63395 states and 81031 transitions. Word has length 242 [2018-09-14 16:01:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:28,850 INFO L480 AbstractCegarLoop]: Abstraction has 63395 states and 81031 transitions. [2018-09-14 16:01:28,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:01:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 63395 states and 81031 transitions. [2018-09-14 16:01:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-14 16:01:28,908 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:28,909 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:28,909 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1403817372, now seen corresponding path program 1 times [2018-09-14 16:01:28,910 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:28,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:28,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:28,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:28,911 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:29,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:29,249 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:29,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:29,257 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:29,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:29,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:30,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:30,194 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:30,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:30,214 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:30,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:30,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:31,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:31,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-14 16:01:31,065 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:31,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:01:31,067 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:01:31,067 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:01:31,067 INFO L87 Difference]: Start difference. First operand 63395 states and 81031 transitions. Second operand 12 states. [2018-09-14 16:01:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:52,657 INFO L93 Difference]: Finished difference Result 222191 states and 327138 transitions. [2018-09-14 16:01:52,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-14 16:01:52,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2018-09-14 16:01:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:53,690 INFO L225 Difference]: With dead ends: 222191 [2018-09-14 16:01:53,690 INFO L226 Difference]: Without dead ends: 158820 [2018-09-14 16:01:53,951 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1032 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1531, Invalid=9811, Unknown=0, NotChecked=0, Total=11342 [2018-09-14 16:01:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158820 states. [2018-09-14 16:01:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158820 to 151387. [2018-09-14 16:01:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151387 states. [2018-09-14 16:01:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151387 states to 151387 states and 182989 transitions. [2018-09-14 16:01:58,305 INFO L78 Accepts]: Start accepts. Automaton has 151387 states and 182989 transitions. Word has length 251 [2018-09-14 16:01:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:58,305 INFO L480 AbstractCegarLoop]: Abstraction has 151387 states and 182989 transitions. [2018-09-14 16:01:58,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:01:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 151387 states and 182989 transitions. [2018-09-14 16:01:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-14 16:01:58,397 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:58,398 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:58,398 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:58,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1697646380, now seen corresponding path program 1 times [2018-09-14 16:01:58,398 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:58,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:58,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:58,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:58,400 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:59,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:59,004 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:01:59,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:59,019 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:59,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:00,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:00,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:00,975 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:00,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:00,991 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:01,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 113 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:01,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:01,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:01,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-14 16:02:01,793 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:01,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:02:01,794 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:02:01,795 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:02:01,795 INFO L87 Difference]: Start difference. First operand 151387 states and 182989 transitions. Second operand 6 states. [2018-09-14 16:02:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:04,061 INFO L93 Difference]: Finished difference Result 268739 states and 324917 transitions. [2018-09-14 16:02:04,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:02:04,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-09-14 16:02:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:04,357 INFO L225 Difference]: With dead ends: 268739 [2018-09-14 16:02:04,357 INFO L226 Difference]: Without dead ends: 125370 [2018-09-14 16:02:04,516 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1150 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:02:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125370 states. [2018-09-14 16:02:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125370 to 124477. [2018-09-14 16:02:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124477 states. [2018-09-14 16:02:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124477 states to 124477 states and 147629 transitions. [2018-09-14 16:02:10,506 INFO L78 Accepts]: Start accepts. Automaton has 124477 states and 147629 transitions. Word has length 290 [2018-09-14 16:02:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:10,507 INFO L480 AbstractCegarLoop]: Abstraction has 124477 states and 147629 transitions. [2018-09-14 16:02:10,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:02:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 124477 states and 147629 transitions. [2018-09-14 16:02:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-14 16:02:10,561 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:10,561 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:02:10,561 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -794164287, now seen corresponding path program 1 times [2018-09-14 16:02:10,562 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:10,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:10,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:10,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:10,563 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:11,189 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:02:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:02:11,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:11,276 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:11,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:11,283 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:11,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-14 16:02:11,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:02:12,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:12,110 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:12,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:12,127 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:12,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 167 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:12,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 173 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:13,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:13,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11, 8] total 26 [2018-09-14 16:02:13,761 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:13,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 16:02:13,762 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 16:02:13,762 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2018-09-14 16:02:13,762 INFO L87 Difference]: Start difference. First operand 124477 states and 147629 transitions. Second operand 10 states. [2018-09-14 16:02:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:20,863 INFO L93 Difference]: Finished difference Result 235311 states and 291105 transitions. [2018-09-14 16:02:20,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 16:02:20,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2018-09-14 16:02:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:21,238 INFO L225 Difference]: With dead ends: 235311 [2018-09-14 16:02:21,238 INFO L226 Difference]: Without dead ends: 131388 [2018-09-14 16:02:21,395 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1268 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2018-09-14 16:02:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131388 states. [2018-09-14 16:02:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131388 to 127318. [2018-09-14 16:02:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127318 states. [2018-09-14 16:02:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127318 states to 127318 states and 146987 transitions. [2018-09-14 16:02:24,229 INFO L78 Accepts]: Start accepts. Automaton has 127318 states and 146987 transitions. Word has length 309 [2018-09-14 16:02:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:24,229 INFO L480 AbstractCegarLoop]: Abstraction has 127318 states and 146987 transitions. [2018-09-14 16:02:24,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 16:02:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 127318 states and 146987 transitions. [2018-09-14 16:02:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-09-14 16:02:24,286 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:24,287 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:02:24,287 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:24,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2072347577, now seen corresponding path program 1 times [2018-09-14 16:02:24,288 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:24,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:24,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:24,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:24,288 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 86 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:24,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:24,828 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:24,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:24,836 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:25,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 86 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:25,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:25,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:25,771 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:25,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:25,787 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:26,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 86 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:26,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:26,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:26,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 4, 4] total 13 [2018-09-14 16:02:26,629 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:26,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:02:26,630 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:02:26,632 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:02:26,632 INFO L87 Difference]: Start difference. First operand 127318 states and 146987 transitions. Second operand 9 states. [2018-09-14 16:02:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:31,774 INFO L93 Difference]: Finished difference Result 237739 states and 287008 transitions. [2018-09-14 16:02:31,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 16:02:31,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 329 [2018-09-14 16:02:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:32,812 INFO L225 Difference]: With dead ends: 237739 [2018-09-14 16:02:32,813 INFO L226 Difference]: Without dead ends: 124865 [2018-09-14 16:02:32,905 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1341 GetRequests, 1312 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:02:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124865 states. [2018-09-14 16:02:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124865 to 120591. [2018-09-14 16:02:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120591 states. [2018-09-14 16:02:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120591 states to 120591 states and 138629 transitions. [2018-09-14 16:02:34,919 INFO L78 Accepts]: Start accepts. Automaton has 120591 states and 138629 transitions. Word has length 329 [2018-09-14 16:02:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:34,920 INFO L480 AbstractCegarLoop]: Abstraction has 120591 states and 138629 transitions. [2018-09-14 16:02:34,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:02:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 120591 states and 138629 transitions. [2018-09-14 16:02:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-09-14 16:02:34,978 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:34,978 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:02:34,978 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1746104119, now seen corresponding path program 1 times [2018-09-14 16:02:34,979 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:34,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:34,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:34,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:34,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:02:35,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:35,469 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:35,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:35,479 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:35,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 90 proven. 108 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:02:36,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:02:36,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:36,368 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:36,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:36,385 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:36,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:02:37,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:02:37,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:37,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 6, 4] total 12 [2018-09-14 16:02:37,216 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:37,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:02:37,217 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:02:37,217 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:02:37,217 INFO L87 Difference]: Start difference. First operand 120591 states and 138629 transitions. Second operand 9 states. [2018-09-14 16:02:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:45,378 INFO L93 Difference]: Finished difference Result 267270 states and 322079 transitions. [2018-09-14 16:02:45,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-14 16:02:45,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 331 [2018-09-14 16:02:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:45,853 INFO L225 Difference]: With dead ends: 267270 [2018-09-14 16:02:45,853 INFO L226 Difference]: Without dead ends: 150688 [2018-09-14 16:02:45,980 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1373 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2018-09-14 16:02:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150688 states. [2018-09-14 16:02:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150688 to 144598. [2018-09-14 16:02:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144598 states. [2018-09-14 16:02:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144598 states to 144598 states and 166264 transitions. [2018-09-14 16:02:49,508 INFO L78 Accepts]: Start accepts. Automaton has 144598 states and 166264 transitions. Word has length 331 [2018-09-14 16:02:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:49,508 INFO L480 AbstractCegarLoop]: Abstraction has 144598 states and 166264 transitions. [2018-09-14 16:02:49,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:02:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 144598 states and 166264 transitions. [2018-09-14 16:02:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-14 16:02:49,598 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:49,599 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:02:49,599 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1906676144, now seen corresponding path program 1 times [2018-09-14 16:02:49,599 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:49,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:49,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:49,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:49,600 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:49,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:49,969 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:49,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:49,978 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:50,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:50,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:50,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:50,566 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:50,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:50,582 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:51,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:51,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:51,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:51,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-09-14 16:02:51,261 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:51,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:02:51,262 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:02:51,262 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:02:51,262 INFO L87 Difference]: Start difference. First operand 144598 states and 166264 transitions. Second operand 6 states. [2018-09-14 16:02:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:57,401 INFO L93 Difference]: Finished difference Result 421456 states and 506864 transitions. [2018-09-14 16:02:57,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:02:57,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2018-09-14 16:02:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:58,574 INFO L225 Difference]: With dead ends: 421456 [2018-09-14 16:02:58,575 INFO L226 Difference]: Without dead ends: 288719 [2018-09-14 16:02:58,781 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1358 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:02:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288719 states. [2018-09-14 16:03:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288719 to 281894. [2018-09-14 16:03:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281894 states. [2018-09-14 16:03:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281894 states to 281894 states and 323645 transitions. [2018-09-14 16:03:05,630 INFO L78 Accepts]: Start accepts. Automaton has 281894 states and 323645 transitions. Word has length 340 [2018-09-14 16:03:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:05,631 INFO L480 AbstractCegarLoop]: Abstraction has 281894 states and 323645 transitions. [2018-09-14 16:03:05,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:03:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 281894 states and 323645 transitions. [2018-09-14 16:03:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-09-14 16:03:05,812 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:05,813 INFO L376 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:05,813 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash -32469061, now seen corresponding path program 1 times [2018-09-14 16:03:05,813 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:05,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:05,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:05,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:05,814 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 216 proven. 14 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-14 16:03:06,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:06,107 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:06,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:06,115 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:06,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-09-14 16:03:06,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 199 proven. 109 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 16:03:06,874 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:03:06,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-09-14 16:03:06,875 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:03:06,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:03:06,875 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:03:06,875 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:03:06,876 INFO L87 Difference]: Start difference. First operand 281894 states and 323645 transitions. Second operand 6 states. [2018-09-14 16:03:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:13,034 INFO L93 Difference]: Finished difference Result 541331 states and 619937 transitions. [2018-09-14 16:03:13,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:03:13,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 385 [2018-09-14 16:03:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:13,831 INFO L225 Difference]: With dead ends: 541331 [2018-09-14 16:03:13,832 INFO L226 Difference]: Without dead ends: 285783 [2018-09-14 16:03:14,115 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 762 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:03:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285783 states. [2018-09-14 16:03:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285783 to 282052. [2018-09-14 16:03:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282052 states. [2018-09-14 16:03:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282052 states to 282052 states and 323600 transitions. [2018-09-14 16:03:26,014 INFO L78 Accepts]: Start accepts. Automaton has 282052 states and 323600 transitions. Word has length 385 [2018-09-14 16:03:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:26,014 INFO L480 AbstractCegarLoop]: Abstraction has 282052 states and 323600 transitions. [2018-09-14 16:03:26,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:03:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 282052 states and 323600 transitions. [2018-09-14 16:03:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-14 16:03:26,233 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:26,233 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:03:26,233 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1141818105, now seen corresponding path program 1 times [2018-09-14 16:03:26,234 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:26,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:26,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:26,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:26,234 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 235 proven. 101 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-09-14 16:03:26,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:26,836 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:26,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:26,845 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:27,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 16:03:27,358 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 16:03:27,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:27,612 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 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:03:27,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:27,628 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:28,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 16:03:29,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 355 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 16:03:29,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:03:29,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:03:29,438 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:03:29,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:03:29,440 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:03:29,440 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:03:29,440 INFO L87 Difference]: Start difference. First operand 282052 states and 323600 transitions. Second operand 9 states. Received shutdown request... [2018-09-14 16:03:52,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-14 16:03:52,297 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:03:52,303 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:03:52,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:03:52 BoogieIcfgContainer [2018-09-14 16:03:52,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:03:52,304 INFO L168 Benchmark]: Toolchain (without parser) took 213467.07 ms. Allocated memory was 1.5 GB in the beginning and 5.6 GB in the end (delta: 4.1 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:52,305 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:03:52,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1124.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:52,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 140.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:52,307 INFO L168 Benchmark]: Boogie Preprocessor took 396.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -907.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:52,308 INFO L168 Benchmark]: RCFGBuilder took 5087.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 249.3 MB). Peak memory consumption was 249.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:52,308 INFO L168 Benchmark]: TraceAbstraction took 206711.69 ms. Allocated memory was 2.3 GB in the beginning and 5.6 GB in the end (delta: 3.3 GB). Free memory was 2.0 GB in the beginning and 3.5 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:52,313 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1124.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 140.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 396.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -907.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5087.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 249.3 MB). Peak memory consumption was 249.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206711.69 ms. Allocated memory was 2.3 GB in the beginning and 5.6 GB in the end (delta: 3.3 GB). Free memory was 2.0 GB in the beginning and 3.5 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1524]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1524). Cancelled while BasicCegarLoop was constructing difference of abstraction (282052states) and FLOYD_HOARE automaton (currently 40 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (983554 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 206.6s OverallTime, 19 OverallIterations, 5 TraceHistogramMax, 127.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5106 SDtfs, 27206 SDslu, 6451 SDs, 0 SdLazy, 49437 SolverSat, 9736 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12718 GetRequests, 12307 SyntacticMatches, 30 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=282052occurred in iteration=18, 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: 46.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 39848 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 10958 NumberOfCodeBlocks, 10958 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 17023 ConstructedInterpolants, 0 QuantifiedInterpolants, 13638025 SizeOfPredicates, 81 NumberOfNonLiveVariables, 24886 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 61 InterpolantComputations, 14 PerfectInterpolantSequences, 8292/9440 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-03-52-327.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-03-52-327.csv Completed graceful shutdown