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_label49_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:16:30,004 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:16:30,006 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:16:30,021 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:16:30,021 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:16:30,022 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:16:30,023 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:16:30,025 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:16:30,027 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:16:30,028 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:16:30,029 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:16:30,029 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:16:30,030 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:16:30,031 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:16:30,032 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:16:30,033 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:16:30,034 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:16:30,035 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:16:30,038 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:16:30,039 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:16:30,040 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:16:30,042 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:16:30,044 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 10:16:30,044 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 10:16:30,044 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 10:16:30,045 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 10:16:30,046 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 10:16:30,047 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 10:16:30,048 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 10:16:30,049 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 10:16:30,049 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 10:16:30,050 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 10:16:30,050 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 10:16:30,051 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 10:16:30,052 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 10:16:30,052 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 10:16:30,053 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 10:16:30,070 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:16:30,070 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:16:30,071 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:16:30,071 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:16:30,072 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:16:30,072 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:16:30,072 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:16:30,072 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:16:30,072 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:16:30,073 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:16:30,073 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:16:30,073 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:16:30,074 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:16:30,074 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:16:30,074 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:16:30,074 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:16:30,075 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:16:30,075 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:16:30,075 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:16:30,075 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:16:30,075 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:16:30,075 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:16:30,076 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:16:30,076 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:16:30,076 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:16:30,076 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:16:30,077 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:16:30,077 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:16:30,077 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:16:30,077 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:16:30,077 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:16:30,077 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:16:30,078 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:16:30,078 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:16:30,127 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:16:30,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:16:30,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:16:30,146 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:16:30,147 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:16:30,147 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c [2018-09-18 10:16:30,495 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108a115ae/dc223f000fa046c0b6894444c4875b9d/FLAG90f108d2d [2018-09-18 10:16:30,880 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:16:30,880 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c [2018-09-18 10:16:30,898 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108a115ae/dc223f000fa046c0b6894444c4875b9d/FLAG90f108d2d [2018-09-18 10:16:30,914 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108a115ae/dc223f000fa046c0b6894444c4875b9d [2018-09-18 10:16:30,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:16:30,930 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:16:30,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:16:30,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:16:30,939 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:16:30,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:16:30" (1/1) ... [2018-09-18 10:16:30,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20fcc92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:30, skipping insertion in model container [2018-09-18 10:16:30,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:16:30" (1/1) ... [2018-09-18 10:16:30,957 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:16:31,707 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:16:31,731 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:16:32,020 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:16:32,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32 WrapperNode [2018-09-18 10:16:32,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:16:32,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:16:32,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:16:32,088 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:16:32,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:16:32,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:16:32,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:16:32,238 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:16:32,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... [2018-09-18 10:16:32,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:16:32,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:16:32,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:16:32,584 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:16:32,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:16:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:16:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:16:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:16:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:16:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:16:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:16:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:16:32,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:16:38,011 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:16:38,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:16:38 BoogieIcfgContainer [2018-09-18 10:16:38,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:16:38,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:16:38,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:16:38,021 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:16:38,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:16:30" (1/3) ... [2018-09-18 10:16:38,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63327323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:16:38, skipping insertion in model container [2018-09-18 10:16:38,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:16:32" (2/3) ... [2018-09-18 10:16:38,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63327323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:16:38, skipping insertion in model container [2018-09-18 10:16:38,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:16:38" (3/3) ... [2018-09-18 10:16:38,026 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label49_true-unreach-call.c [2018-09-18 10:16:38,037 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:16:38,048 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:16:38,114 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:16:38,115 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:16:38,115 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:16:38,115 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:16:38,115 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:16:38,115 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:16:38,116 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:16:38,116 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:16:38,116 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:16:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:16:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-18 10:16:38,168 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:38,170 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:38,171 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1345868708, now seen corresponding path program 1 times [2018-09-18 10:16:38,180 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:38,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:38,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:38,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:38,242 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:39,136 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:16:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:39,394 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:16:39,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:16:39,395 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:39,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:16:39,420 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:16:39,421 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:16:39,423 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-18 10:16:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:41,511 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-09-18 10:16:41,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:16:41,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2018-09-18 10:16:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:41,545 INFO L225 Difference]: With dead ends: 844 [2018-09-18 10:16:41,545 INFO L226 Difference]: Without dead ends: 530 [2018-09-18 10:16:41,556 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:16:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-09-18 10:16:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-09-18 10:16:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-09-18 10:16:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-09-18 10:16:41,681 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 175 [2018-09-18 10:16:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:41,683 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-09-18 10:16:41,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:16:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-09-18 10:16:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-18 10:16:41,691 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:41,691 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, 1, 1, 1, 1, 1] [2018-09-18 10:16:41,692 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash 396212824, now seen corresponding path program 1 times [2018-09-18 10:16:41,692 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:41,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:41,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:41,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:41,694 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:42,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:42,626 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:16:42,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:42,728 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:43,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:43,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:43,712 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:16:43,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-18 10:16:43,712 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:43,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:16:43,714 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:16:43,714 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:16:43,718 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-09-18 10:16:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:46,435 INFO L93 Difference]: Finished difference Result 1465 states and 2486 transitions. [2018-09-18 10:16:46,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:16:46,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2018-09-18 10:16:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:46,444 INFO L225 Difference]: With dead ends: 1465 [2018-09-18 10:16:46,444 INFO L226 Difference]: Without dead ends: 946 [2018-09-18 10:16:46,450 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 376 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:16:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2018-09-18 10:16:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2018-09-18 10:16:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2018-09-18 10:16:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1412 transitions. [2018-09-18 10:16:46,492 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1412 transitions. Word has length 188 [2018-09-18 10:16:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:46,493 INFO L480 AbstractCegarLoop]: Abstraction has 944 states and 1412 transitions. [2018-09-18 10:16:46,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:16:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1412 transitions. [2018-09-18 10:16:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-18 10:16:46,499 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:46,499 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:46,499 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:46,500 INFO L82 PathProgramCache]: Analyzing trace with hash -371681376, now seen corresponding path program 1 times [2018-09-18 10:16:46,500 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:46,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:46,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:46,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:46,501 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:46,812 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:16:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:46,886 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:16:46,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-18 10:16:46,886 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:46,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:16:46,887 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:16:46,887 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:46,888 INFO L87 Difference]: Start difference. First operand 944 states and 1412 transitions. Second operand 7 states. [2018-09-18 10:16:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:51,763 INFO L93 Difference]: Finished difference Result 2926 states and 4708 transitions. [2018-09-18 10:16:51,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:16:51,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2018-09-18 10:16:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:51,790 INFO L225 Difference]: With dead ends: 2926 [2018-09-18 10:16:51,791 INFO L226 Difference]: Without dead ends: 1988 [2018-09-18 10:16:51,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:16:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2018-09-18 10:16:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1894. [2018-09-18 10:16:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2018-09-18 10:16:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2864 transitions. [2018-09-18 10:16:51,940 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2864 transitions. Word has length 192 [2018-09-18 10:16:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:51,940 INFO L480 AbstractCegarLoop]: Abstraction has 1894 states and 2864 transitions. [2018-09-18 10:16:51,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:16:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2864 transitions. [2018-09-18 10:16:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-18 10:16:51,949 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:51,949 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:51,950 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash 551512485, now seen corresponding path program 1 times [2018-09-18 10:16:51,950 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:51,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:51,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:51,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:51,952 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:52,220 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:16:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:52,554 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:16:52,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:16:52,554 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:52,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:16:52,555 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:16:52,555 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:16:52,556 INFO L87 Difference]: Start difference. First operand 1894 states and 2864 transitions. Second operand 6 states. [2018-09-18 10:16:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:55,258 INFO L93 Difference]: Finished difference Result 5784 states and 9437 transitions. [2018-09-18 10:16:55,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:16:55,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2018-09-18 10:16:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:55,307 INFO L225 Difference]: With dead ends: 5784 [2018-09-18 10:16:55,308 INFO L226 Difference]: Without dead ends: 3896 [2018-09-18 10:16:55,318 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:16:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2018-09-18 10:16:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 3789. [2018-09-18 10:16:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3789 states. [2018-09-18 10:16:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 5826 transitions. [2018-09-18 10:16:55,478 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 5826 transitions. Word has length 193 [2018-09-18 10:16:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:55,479 INFO L480 AbstractCegarLoop]: Abstraction has 3789 states and 5826 transitions. [2018-09-18 10:16:55,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:16:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 5826 transitions. [2018-09-18 10:16:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-18 10:16:55,493 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:55,494 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:55,494 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash -30855632, now seen corresponding path program 1 times [2018-09-18 10:16:55,495 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:55,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:55,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:55,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:55,497 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:55,757 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:16:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:56,143 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:16:56,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:16:56,143 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:56,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:16:56,144 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:16:56,144 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:16:56,144 INFO L87 Difference]: Start difference. First operand 3789 states and 5826 transitions. Second operand 6 states. [2018-09-18 10:16:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:16:58,040 INFO L93 Difference]: Finished difference Result 8133 states and 12830 transitions. [2018-09-18 10:16:58,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:16:58,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 200 [2018-09-18 10:16:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:16:58,065 INFO L225 Difference]: With dead ends: 8133 [2018-09-18 10:16:58,066 INFO L226 Difference]: Without dead ends: 4350 [2018-09-18 10:16:58,081 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 [2018-09-18 10:16:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2018-09-18 10:16:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 3835. [2018-09-18 10:16:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3835 states. [2018-09-18 10:16:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 5587 transitions. [2018-09-18 10:16:58,199 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 5587 transitions. Word has length 200 [2018-09-18 10:16:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:16:58,200 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 5587 transitions. [2018-09-18 10:16:58,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:16:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 5587 transitions. [2018-09-18 10:16:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-18 10:16:58,212 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:16:58,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:16:58,212 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:16:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -835087436, now seen corresponding path program 1 times [2018-09-18 10:16:58,213 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:16:58,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:58,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:58,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:16:58,214 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:16:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:16:58,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:16:58,435 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:16:58,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:16:58,444 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:16:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:16:58,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:16:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:58,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:16:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:16:58,906 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:16:58,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 10:16:58,906 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:16:58,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:16:58,908 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:16:58,908 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:16:58,908 INFO L87 Difference]: Start difference. First operand 3835 states and 5587 transitions. Second operand 3 states. [2018-09-18 10:17:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:00,665 INFO L93 Difference]: Finished difference Result 11190 states and 16721 transitions. [2018-09-18 10:17:00,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:17:00,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2018-09-18 10:17:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:00,711 INFO L225 Difference]: With dead ends: 11190 [2018-09-18 10:17:00,711 INFO L226 Difference]: Without dead ends: 7361 [2018-09-18 10:17:00,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 424 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:17:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2018-09-18 10:17:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 7350. [2018-09-18 10:17:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7350 states. [2018-09-18 10:17:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7350 states to 7350 states and 10406 transitions. [2018-09-18 10:17:00,932 INFO L78 Accepts]: Start accepts. Automaton has 7350 states and 10406 transitions. Word has length 213 [2018-09-18 10:17:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:00,933 INFO L480 AbstractCegarLoop]: Abstraction has 7350 states and 10406 transitions. [2018-09-18 10:17:00,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:17:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 7350 states and 10406 transitions. [2018-09-18 10:17:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-18 10:17:00,966 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:00,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:17:00,967 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash -288629148, now seen corresponding path program 1 times [2018-09-18 10:17:00,967 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:00,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:00,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:00,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:00,969 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:01,398 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:17:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:01,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:01,699 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 [2018-09-18 10:17:01,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:01,708 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:01,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:02,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:02,179 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 10:17:02,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-18 10:17:02,179 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:02,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:17:02,180 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:17:02,180 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:17:02,181 INFO L87 Difference]: Start difference. First operand 7350 states and 10406 transitions. Second operand 3 states. [2018-09-18 10:17:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:04,231 INFO L93 Difference]: Finished difference Result 21648 states and 31418 transitions. [2018-09-18 10:17:04,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:17:04,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2018-09-18 10:17:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:04,305 INFO L225 Difference]: With dead ends: 21648 [2018-09-18 10:17:04,305 INFO L226 Difference]: Without dead ends: 14304 [2018-09-18 10:17:04,333 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 441 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:17:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14304 states. [2018-09-18 10:17:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14304 to 14255. [2018-09-18 10:17:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14255 states. [2018-09-18 10:17:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14255 states to 14255 states and 20354 transitions. [2018-09-18 10:17:04,775 INFO L78 Accepts]: Start accepts. Automaton has 14255 states and 20354 transitions. Word has length 221 [2018-09-18 10:17:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:04,776 INFO L480 AbstractCegarLoop]: Abstraction has 14255 states and 20354 transitions. [2018-09-18 10:17:04,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:17:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 14255 states and 20354 transitions. [2018-09-18 10:17:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-09-18 10:17:04,819 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:04,819 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:17:04,820 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash 85802649, now seen corresponding path program 1 times [2018-09-18 10:17:04,820 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:04,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:04,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:04,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:04,822 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 10:17:05,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:05,457 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:17:05,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:05,468 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:05,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:05,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:06,110 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 10:17:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:06,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:06,480 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:17:06,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:06,510 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:07,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:07,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:07,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:17:07,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-18 10:17:07,462 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:17:07,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:17:07,463 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:17:07,463 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-18 10:17:07,463 INFO L87 Difference]: Start difference. First operand 14255 states and 20354 transitions. Second operand 9 states. [2018-09-18 10:17:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:14,347 INFO L93 Difference]: Finished difference Result 49112 states and 75587 transitions. [2018-09-18 10:17:14,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 10:17:14,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 245 [2018-09-18 10:17:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:14,688 INFO L225 Difference]: With dead ends: 49112 [2018-09-18 10:17:14,689 INFO L226 Difference]: Without dead ends: 34863 [2018-09-18 10:17:14,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 973 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-18 10:17:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34863 states. [2018-09-18 10:17:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34863 to 31982. [2018-09-18 10:17:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31982 states. [2018-09-18 10:17:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31982 states to 31982 states and 46826 transitions. [2018-09-18 10:17:15,567 INFO L78 Accepts]: Start accepts. Automaton has 31982 states and 46826 transitions. Word has length 245 [2018-09-18 10:17:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:15,568 INFO L480 AbstractCegarLoop]: Abstraction has 31982 states and 46826 transitions. [2018-09-18 10:17:15,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:17:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31982 states and 46826 transitions. [2018-09-18 10:17:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-18 10:17:15,668 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:15,669 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, 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] [2018-09-18 10:17:15,669 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -585964937, now seen corresponding path program 1 times [2018-09-18 10:17:15,670 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:15,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:15,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:15,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:15,672 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:15,962 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:17:15,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:17:15,963 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:15,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:17:15,964 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:17:15,964 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:17:15,964 INFO L87 Difference]: Start difference. First operand 31982 states and 46826 transitions. Second operand 3 states. [2018-09-18 10:17:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:18,409 INFO L93 Difference]: Finished difference Result 92167 states and 138937 transitions. [2018-09-18 10:17:18,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:17:18,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2018-09-18 10:17:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:18,749 INFO L225 Difference]: With dead ends: 92167 [2018-09-18 10:17:18,750 INFO L226 Difference]: Without dead ends: 60191 [2018-09-18 10:17:18,866 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:17:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60191 states. [2018-09-18 10:17:20,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60191 to 60139. [2018-09-18 10:17:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60139 states. [2018-09-18 10:17:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60139 states to 60139 states and 89016 transitions. [2018-09-18 10:17:20,815 INFO L78 Accepts]: Start accepts. Automaton has 60139 states and 89016 transitions. Word has length 243 [2018-09-18 10:17:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:20,816 INFO L480 AbstractCegarLoop]: Abstraction has 60139 states and 89016 transitions. [2018-09-18 10:17:20,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:17:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 60139 states and 89016 transitions. [2018-09-18 10:17:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-18 10:17:20,926 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:20,927 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:17:20,927 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash -120240748, now seen corresponding path program 1 times [2018-09-18 10:17:20,927 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:20,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:20,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:20,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:20,929 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:21,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:21,439 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:17:21,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:21,455 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:21,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:22,178 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:22,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:22,627 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:17:22,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:22,643 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:23,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:23,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:23,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:17:23,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-18 10:17:23,275 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:17:23,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:17:23,276 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:17:23,276 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:17:23,276 INFO L87 Difference]: Start difference. First operand 60139 states and 89016 transitions. Second operand 9 states. [2018-09-18 10:17:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:33,777 INFO L93 Difference]: Finished difference Result 131726 states and 212580 transitions. [2018-09-18 10:17:33,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-18 10:17:33,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 255 [2018-09-18 10:17:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:34,146 INFO L225 Difference]: With dead ends: 131726 [2018-09-18 10:17:34,147 INFO L226 Difference]: Without dead ends: 71603 [2018-09-18 10:17:34,303 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 1033 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2018-09-18 10:17:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71603 states. [2018-09-18 10:17:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71603 to 67709. [2018-09-18 10:17:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67709 states. [2018-09-18 10:17:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67709 states to 67709 states and 87566 transitions. [2018-09-18 10:17:36,287 INFO L78 Accepts]: Start accepts. Automaton has 67709 states and 87566 transitions. Word has length 255 [2018-09-18 10:17:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:36,287 INFO L480 AbstractCegarLoop]: Abstraction has 67709 states and 87566 transitions. [2018-09-18 10:17:36,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:17:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 67709 states and 87566 transitions. [2018-09-18 10:17:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-09-18 10:17:36,362 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:36,362 INFO L376 BasicCegarLoop]: trace histogram [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, 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] [2018-09-18 10:17:36,363 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1354882869, now seen corresponding path program 1 times [2018-09-18 10:17:36,363 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:36,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:36,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:36,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:36,364 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:36,692 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:17:37,044 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-18 10:17:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 97 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:17:37,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:37,394 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:17:37,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:37,402 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:37,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-18 10:17:37,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 99 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 10:17:37,968 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:17:37,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-18 10:17:37,969 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:37,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:17:37,970 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:17:37,971 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:17:37,971 INFO L87 Difference]: Start difference. First operand 67709 states and 87566 transitions. Second operand 5 states. [2018-09-18 10:17:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:40,518 INFO L93 Difference]: Finished difference Result 175017 states and 232959 transitions. [2018-09-18 10:17:40,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:17:40,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2018-09-18 10:17:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:41,094 INFO L225 Difference]: With dead ends: 175017 [2018-09-18 10:17:41,094 INFO L226 Difference]: Without dead ends: 121476 [2018-09-18 10:17:41,237 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 542 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:17:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121476 states. [2018-09-18 10:17:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121476 to 118781. [2018-09-18 10:17:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118781 states. [2018-09-18 10:17:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118781 states to 118781 states and 151495 transitions. [2018-09-18 10:17:44,573 INFO L78 Accepts]: Start accepts. Automaton has 118781 states and 151495 transitions. Word has length 275 [2018-09-18 10:17:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:44,573 INFO L480 AbstractCegarLoop]: Abstraction has 118781 states and 151495 transitions. [2018-09-18 10:17:44,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:17:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 118781 states and 151495 transitions. [2018-09-18 10:17:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-18 10:17:44,721 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:44,721 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:17:44,722 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1166612077, now seen corresponding path program 1 times [2018-09-18 10:17:44,722 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:44,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:44,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:44,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:44,723 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 145 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:17:45,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:45,046 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 [2018-09-18 10:17:45,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:45,055 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:45,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:17:45,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 145 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:17:45,556 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:17:45,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:17:45,556 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:45,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:17:45,557 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:17:45,557 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:17:45,557 INFO L87 Difference]: Start difference. First operand 118781 states and 151495 transitions. Second operand 5 states. [2018-09-18 10:17:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:50,094 INFO L93 Difference]: Finished difference Result 269701 states and 352913 transitions. [2018-09-18 10:17:50,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:17:50,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2018-09-18 10:17:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:50,547 INFO L225 Difference]: With dead ends: 269701 [2018-09-18 10:17:50,547 INFO L226 Difference]: Without dead ends: 150966 [2018-09-18 10:17:50,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 646 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:17:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150966 states. [2018-09-18 10:17:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150966 to 150181. [2018-09-18 10:17:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150181 states. [2018-09-18 10:17:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150181 states to 150181 states and 183779 transitions. [2018-09-18 10:17:53,387 INFO L78 Accepts]: Start accepts. Automaton has 150181 states and 183779 transitions. Word has length 326 [2018-09-18 10:17:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:53,387 INFO L480 AbstractCegarLoop]: Abstraction has 150181 states and 183779 transitions. [2018-09-18 10:17:53,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:17:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 150181 states and 183779 transitions. [2018-09-18 10:17:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-09-18 10:17:53,538 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:53,539 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:17:53,539 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash 912745094, now seen corresponding path program 1 times [2018-09-18 10:17:53,539 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:53,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:53,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:53,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:53,541 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 212 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:17:54,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:54,658 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:17:54,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:54,667 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:54,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-18 10:17:55,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 195 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-18 10:17:55,345 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:17:55,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:17:55,345 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:55,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:17:55,346 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:17:55,346 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:17:55,346 INFO L87 Difference]: Start difference. First operand 150181 states and 183779 transitions. Second operand 5 states. [2018-09-18 10:17:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:58,137 INFO L93 Difference]: Finished difference Result 290965 states and 361727 transitions. [2018-09-18 10:17:58,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:17:58,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 373 [2018-09-18 10:17:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:58,523 INFO L225 Difference]: With dead ends: 290965 [2018-09-18 10:17:58,523 INFO L226 Difference]: Without dead ends: 151340 [2018-09-18 10:17:58,693 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:17:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151340 states. [2018-09-18 10:18:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151340 to 150223. [2018-09-18 10:18:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150223 states. [2018-09-18 10:18:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150223 states to 150223 states and 183466 transitions. [2018-09-18 10:18:02,095 INFO L78 Accepts]: Start accepts. Automaton has 150223 states and 183466 transitions. Word has length 373 [2018-09-18 10:18:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:02,096 INFO L480 AbstractCegarLoop]: Abstraction has 150223 states and 183466 transitions. [2018-09-18 10:18:02,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:18:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 150223 states and 183466 transitions. [2018-09-18 10:18:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-18 10:18:02,251 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:02,251 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:18:02,251 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1309372110, now seen corresponding path program 1 times [2018-09-18 10:18:02,252 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:02,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:02,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:02,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:02,253 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 241 proven. 14 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-09-18 10:18:03,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:03,080 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:18:03,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:03,089 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:03,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-18 10:18:03,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-18 10:18:03,878 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:18:03,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2018-09-18 10:18:03,879 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:03,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:18:03,880 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:18:03,880 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:18:03,880 INFO L87 Difference]: Start difference. First operand 150223 states and 183466 transitions. Second operand 3 states. [2018-09-18 10:18:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:05,941 INFO L93 Difference]: Finished difference Result 289526 states and 351805 transitions. [2018-09-18 10:18:05,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:18:05,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2018-09-18 10:18:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:06,318 INFO L225 Difference]: With dead ends: 289526 [2018-09-18 10:18:06,318 INFO L226 Difference]: Without dead ends: 150211 [2018-09-18 10:18:06,493 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 829 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:18:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150211 states. [2018-09-18 10:18:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150211 to 150211. [2018-09-18 10:18:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150211 states. [2018-09-18 10:18:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150211 states to 150211 states and 183396 transitions. [2018-09-18 10:18:13,233 INFO L78 Accepts]: Start accepts. Automaton has 150211 states and 183396 transitions. Word has length 415 [2018-09-18 10:18:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:13,234 INFO L480 AbstractCegarLoop]: Abstraction has 150211 states and 183396 transitions. [2018-09-18 10:18:13,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:18:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 150211 states and 183396 transitions. [2018-09-18 10:18:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-09-18 10:18:13,388 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:13,388 INFO L376 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:18:13,389 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1456401725, now seen corresponding path program 1 times [2018-09-18 10:18:13,389 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:13,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:13,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:13,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:13,390 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 257 proven. 30 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-09-18 10:18:13,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:13,867 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:18:13,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:13,874 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:14,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-09-18 10:18:14,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 232 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-18 10:18:15,407 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:18:15,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2018-09-18 10:18:15,407 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:15,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:18:15,408 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:18:15,408 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:18:15,408 INFO L87 Difference]: Start difference. First operand 150211 states and 183396 transitions. Second operand 6 states. [2018-09-18 10:18:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:19,604 INFO L93 Difference]: Finished difference Result 314514 states and 386074 transitions. [2018-09-18 10:18:19,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:18:19,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 421 [2018-09-18 10:18:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:20,216 INFO L225 Difference]: With dead ends: 314514 [2018-09-18 10:18:20,217 INFO L226 Difference]: Without dead ends: 167804 [2018-09-18 10:18:20,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 834 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-09-18 10:18:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167804 states. [2018-09-18 10:18:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167804 to 158715. [2018-09-18 10:18:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158715 states. [2018-09-18 10:18:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158715 states to 158715 states and 191835 transitions. [2018-09-18 10:18:24,344 INFO L78 Accepts]: Start accepts. Automaton has 158715 states and 191835 transitions. Word has length 421 [2018-09-18 10:18:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:24,344 INFO L480 AbstractCegarLoop]: Abstraction has 158715 states and 191835 transitions. [2018-09-18 10:18:24,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:18:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 158715 states and 191835 transitions. [2018-09-18 10:18:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-09-18 10:18:24,571 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:24,572 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:24,572 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:24,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2081657621, now seen corresponding path program 1 times [2018-09-18 10:18:24,573 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:24,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:24,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:24,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:24,574 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 314 proven. 137 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-09-18 10:18:25,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:25,767 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:18:25,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:25,776 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:26,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-09-18 10:18:26,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 314 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-09-18 10:18:26,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:26,417 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:18:26,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:26,435 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:27,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-09-18 10:18:27,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 314 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-09-18 10:18:27,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:18:27,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-09-18 10:18:27,597 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:18:27,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-18 10:18:27,598 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-18 10:18:27,598 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-18 10:18:27,598 INFO L87 Difference]: Start difference. First operand 158715 states and 191835 transitions. Second operand 14 states. [2018-09-18 10:18:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:55,236 INFO L93 Difference]: Finished difference Result 1223078 states and 1576353 transitions. [2018-09-18 10:18:55,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-18 10:18:55,237 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 444 [2018-09-18 10:18:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:19:00,528 INFO L225 Difference]: With dead ends: 1223078 [2018-09-18 10:19:00,528 INFO L226 Difference]: Without dead ends: 1064377 [2018-09-18 10:19:01,063 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1888 GetRequests, 1814 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1006, Invalid=4250, Unknown=0, NotChecked=0, Total=5256 [2018-09-18 10:19:01,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064377 states. [2018-09-18 10:19:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064377 to 1055386. [2018-09-18 10:19:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055386 states. [2018-09-18 10:19:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055386 states to 1055386 states and 1306463 transitions. [2018-09-18 10:19:46,028 INFO L78 Accepts]: Start accepts. Automaton has 1055386 states and 1306463 transitions. Word has length 444 [2018-09-18 10:19:46,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:19:46,028 INFO L480 AbstractCegarLoop]: Abstraction has 1055386 states and 1306463 transitions. [2018-09-18 10:19:46,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-18 10:19:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1055386 states and 1306463 transitions. [2018-09-18 10:19:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-18 10:19:48,579 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:19:48,579 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 10:19:48,580 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:19:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -649207228, now seen corresponding path program 1 times [2018-09-18 10:19:48,580 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:19:48,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:48,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:48,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:48,582 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:19:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:49,058 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:19:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 201 proven. 178 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-09-18 10:19:49,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:19:49,341 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:19:49,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:49,350 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:19:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:49,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:19:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 301 proven. 30 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-09-18 10:19:49,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-09-18 10:20:00,022 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 10:20:00,224 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:20:00,224 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:20:00,230 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:20:00,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:20:00 BoogieIcfgContainer [2018-09-18 10:20:00,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:20:00,231 INFO L168 Benchmark]: Toolchain (without parser) took 209304.33 ms. Allocated memory was 1.5 GB in the beginning and 7.1 GB in the end (delta: 5.5 GB). Free memory was 1.4 GB in the beginning and 4.8 GB in the end (delta: -3.4 GB). Peak memory consumption was 4.6 GB. Max. memory is 7.1 GB. [2018-09-18 10:20:00,233 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 10:20:00,233 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1155.21 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:00,234 INFO L168 Benchmark]: Boogie Procedure Inliner took 149.97 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. [2018-09-18 10:20:00,235 INFO L168 Benchmark]: Boogie Preprocessor took 345.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 805.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -937.9 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:00,235 INFO L168 Benchmark]: RCFGBuilder took 5429.84 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 269.8 MB). Peak memory consumption was 269.8 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:00,236 INFO L168 Benchmark]: TraceAbstraction took 202214.85 ms. Allocated memory was 2.3 GB in the beginning and 7.1 GB in the end (delta: 4.7 GB). Free memory was 2.0 GB in the beginning and 4.8 GB in the end (delta: -2.8 GB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. [2018-09-18 10:20:00,241 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1155.21 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 149.97 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 345.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 805.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -937.9 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5429.84 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 269.8 MB). Peak memory consumption was 269.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202214.85 ms. Allocated memory was 2.3 GB in the beginning and 7.1 GB in the end (delta: 4.7 GB). Free memory was 2.0 GB in the beginning and 4.8 GB in the end (delta: -2.8 GB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1539]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1539). Cancelled while BasicCegarLoop was analyzing trace of length 448 with TraceHistMax 4, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 202.1s OverallTime, 17 OverallIterations, 7 TraceHistogramMax, 92.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3744 SDtfs, 21003 SDslu, 4790 SDs, 0 SdLazy, 27706 SolverSat, 5318 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8923 GetRequests, 8665 SyntacticMatches, 32 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1055386occurred in iteration=16, 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: 71.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 30287 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 8699 NumberOfCodeBlocks, 8699 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 12975 ConstructedInterpolants, 0 QuantifiedInterpolants, 8427946 SizeOfPredicates, 27 NumberOfNonLiveVariables, 17965 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 44 InterpolantComputations, 16 PerfectInterpolantSequences, 7853/8585 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_label49_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-20-00-256.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label49_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-20-00-256.csv Completed graceful shutdown