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_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:05:21,133 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:05:21,136 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:05:21,155 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:05:21,155 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:05:21,156 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:05:21,157 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:05:21,159 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:05:21,161 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:05:21,162 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:05:21,163 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:05:21,163 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:05:21,164 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:05:21,165 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:05:21,166 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:05:21,167 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:05:21,168 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:05:21,173 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:05:21,175 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:05:21,178 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:05:21,181 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:05:21,184 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:05:21,189 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:05:21,189 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:05:21,189 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:05:21,191 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:05:21,192 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:05:21,193 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:05:21,194 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:05:21,194 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:05:21,195 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:05:21,195 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:05:21,198 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:05:21,198 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:05:21,199 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:05:21,201 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:05:21,201 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:05:21,229 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:05:21,230 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:05:21,231 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:05:21,231 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:05:21,231 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:05:21,232 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:05:21,232 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:05:21,232 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:05:21,232 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:05:21,232 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:05:21,232 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:05:21,233 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:05:21,233 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:05:21,233 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:05:21,233 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:05:21,233 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:05:21,234 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:05:21,234 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:05:21,234 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:05:21,234 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:05:21,234 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:05:21,235 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:05:21,235 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:05:21,235 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:05:21,235 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:05:21,235 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:05:21,235 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:05:21,236 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:05:21,236 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:05:21,236 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:05:21,236 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:05:21,236 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:05:21,237 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:05:21,290 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:05:21,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:05:21,310 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:05:21,312 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:05:21,312 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:05:21,313 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-09-14 16:05:21,646 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9c0540b3/067b65ef8d0448709812741d59ceb505/FLAGa2f39e1a7 [2018-09-14 16:05:21,973 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:05:21,973 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label44_true-unreach-call.c [2018-09-14 16:05:21,995 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9c0540b3/067b65ef8d0448709812741d59ceb505/FLAGa2f39e1a7 [2018-09-14 16:05:22,018 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9c0540b3/067b65ef8d0448709812741d59ceb505 [2018-09-14 16:05:22,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:05:22,035 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:05:22,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:05:22,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:05:22,046 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:05:22,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:05:22" (1/1) ... [2018-09-14 16:05:22,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ecd98b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:22, skipping insertion in model container [2018-09-14 16:05:22,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:05:22" (1/1) ... [2018-09-14 16:05:22,066 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:05:22,843 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:05:22,860 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:05:23,140 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:05:23,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23 WrapperNode [2018-09-14 16:05:23,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:05:23,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:05:23,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:05:23,212 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:05:23,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:05:23,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:05:23,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:05:23,357 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:05:23,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... [2018-09-14 16:05:23,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:05:23,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:05:23,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:05:23,732 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:05:23,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:05:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:05:23,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:05:23,809 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:05:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:05:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:05:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:05:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:05:29,030 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:05:29,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:05:29 BoogieIcfgContainer [2018-09-14 16:05:29,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:05:29,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:05:29,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:05:29,036 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:05:29,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:05:22" (1/3) ... [2018-09-14 16:05:29,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e18a87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:05:29, skipping insertion in model container [2018-09-14 16:05:29,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:05:23" (2/3) ... [2018-09-14 16:05:29,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e18a87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:05:29, skipping insertion in model container [2018-09-14 16:05:29,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:05:29" (3/3) ... [2018-09-14 16:05:29,040 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44_true-unreach-call.c [2018-09-14 16:05:29,051 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:05:29,061 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:05:29,118 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:05:29,119 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:05:29,119 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:05:29,119 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:05:29,120 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:05:29,120 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:05:29,120 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:05:29,120 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:05:29,120 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:05:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:05:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-14 16:05:29,170 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:29,171 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:29,173 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:29,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1268744215, now seen corresponding path program 1 times [2018-09-14 16:05:29,182 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:29,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:29,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:29,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:29,242 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:30,590 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:30,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 16:05:30,590 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:30,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:05:30,613 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:05:30,614 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:05:30,616 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-14 16:05:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:33,741 INFO L93 Difference]: Finished difference Result 1086 states and 1949 transitions. [2018-09-14 16:05:33,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:05:33,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2018-09-14 16:05:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:33,769 INFO L225 Difference]: With dead ends: 1086 [2018-09-14 16:05:33,769 INFO L226 Difference]: Without dead ends: 768 [2018-09-14 16:05:33,780 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 16:05:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2018-09-14 16:05:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 525. [2018-09-14 16:05:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-09-14 16:05:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 910 transitions. [2018-09-14 16:05:33,915 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 910 transitions. Word has length 184 [2018-09-14 16:05:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:33,917 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 910 transitions. [2018-09-14 16:05:33,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:05:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 910 transitions. [2018-09-14 16:05:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-14 16:05:33,929 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:33,930 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:33,930 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1064364326, now seen corresponding path program 1 times [2018-09-14 16:05:33,934 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:33,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:33,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:33,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:33,935 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:34,224 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:34,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 16:05:34,224 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:05:34,227 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:05:34,227 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 16:05:34,227 INFO L87 Difference]: Start difference. First operand 525 states and 910 transitions. Second operand 5 states. [2018-09-14 16:05:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:37,581 INFO L93 Difference]: Finished difference Result 1613 states and 2895 transitions. [2018-09-14 16:05:37,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:05:37,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2018-09-14 16:05:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:37,599 INFO L225 Difference]: With dead ends: 1613 [2018-09-14 16:05:37,600 INFO L226 Difference]: Without dead ends: 1094 [2018-09-14 16:05:37,604 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:05:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2018-09-14 16:05:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 864. [2018-09-14 16:05:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2018-09-14 16:05:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1422 transitions. [2018-09-14 16:05:37,678 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1422 transitions. Word has length 195 [2018-09-14 16:05:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:37,679 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1422 transitions. [2018-09-14 16:05:37,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:05:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1422 transitions. [2018-09-14 16:05:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-14 16:05:37,683 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:37,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:37,684 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:37,684 INFO L82 PathProgramCache]: Analyzing trace with hash -262902419, now seen corresponding path program 1 times [2018-09-14 16:05:37,684 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:37,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:37,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:37,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:37,686 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:38,042 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:38,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:05:38,043 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:38,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:05:38,044 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:05:38,047 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:05:38,047 INFO L87 Difference]: Start difference. First operand 864 states and 1422 transitions. Second operand 3 states. [2018-09-14 16:05:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:41,204 INFO L93 Difference]: Finished difference Result 2471 states and 4181 transitions. [2018-09-14 16:05:41,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:41,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2018-09-14 16:05:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:41,219 INFO L225 Difference]: With dead ends: 2471 [2018-09-14 16:05:41,220 INFO L226 Difference]: Without dead ends: 1613 [2018-09-14 16:05:41,224 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:05:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2018-09-14 16:05:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1610. [2018-09-14 16:05:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2018-09-14 16:05:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2542 transitions. [2018-09-14 16:05:41,271 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2542 transitions. Word has length 197 [2018-09-14 16:05:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:41,272 INFO L480 AbstractCegarLoop]: Abstraction has 1610 states and 2542 transitions. [2018-09-14 16:05:41,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2542 transitions. [2018-09-14 16:05:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-14 16:05:41,279 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:41,280 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:41,280 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash -128043501, now seen corresponding path program 1 times [2018-09-14 16:05:41,280 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:41,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:41,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:41,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:41,282 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:41,553 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:05:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:05:41,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:41,933 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:41,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:41,943 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:42,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:05:42,303 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-14 16:05:42,480 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:05:42,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2018-09-14 16:05:42,480 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:42,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:05:42,481 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:05:42,481 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:05:42,482 INFO L87 Difference]: Start difference. First operand 1610 states and 2542 transitions. Second operand 3 states. [2018-09-14 16:05:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:43,341 INFO L93 Difference]: Finished difference Result 3213 states and 5081 transitions. [2018-09-14 16:05:43,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:05:43,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2018-09-14 16:05:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:43,357 INFO L225 Difference]: With dead ends: 3213 [2018-09-14 16:05:43,358 INFO L226 Difference]: Without dead ends: 1609 [2018-09-14 16:05:43,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:05:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2018-09-14 16:05:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2018-09-14 16:05:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2018-09-14 16:05:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2540 transitions. [2018-09-14 16:05:43,412 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2540 transitions. Word has length 205 [2018-09-14 16:05:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:43,413 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 2540 transitions. [2018-09-14 16:05:43,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:05:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2540 transitions. [2018-09-14 16:05:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-14 16:05:43,421 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:43,421 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:43,422 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:43,422 INFO L82 PathProgramCache]: Analyzing trace with hash 187311964, now seen corresponding path program 1 times [2018-09-14 16:05:43,422 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:43,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:43,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:43,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:43,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:43,680 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:05:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:44,036 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:05:44,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:05:44,036 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:05:44,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:05:44,037 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:05:44,037 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:05:44,038 INFO L87 Difference]: Start difference. First operand 1609 states and 2540 transitions. Second operand 6 states. [2018-09-14 16:05:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:05:46,764 INFO L93 Difference]: Finished difference Result 3333 states and 5338 transitions. [2018-09-14 16:05:46,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:05:46,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2018-09-14 16:05:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:05:46,776 INFO L225 Difference]: With dead ends: 3333 [2018-09-14 16:05:46,776 INFO L226 Difference]: Without dead ends: 1730 [2018-09-14 16:05:46,783 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:05:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2018-09-14 16:05:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1617. [2018-09-14 16:05:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1617 states. [2018-09-14 16:05:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2344 transitions. [2018-09-14 16:05:46,831 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2344 transitions. Word has length 204 [2018-09-14 16:05:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:05:46,831 INFO L480 AbstractCegarLoop]: Abstraction has 1617 states and 2344 transitions. [2018-09-14 16:05:46,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:05:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2344 transitions. [2018-09-14 16:05:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-14 16:05:46,837 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:05:46,838 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:05:46,838 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:05:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash -373019936, now seen corresponding path program 1 times [2018-09-14 16:05:46,838 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:05:46,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:46,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:46,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:05:46,840 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:05:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:47,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:47,322 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:05:47,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:47,339 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:47,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:47,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:48,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:05:48,087 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:05:48,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:05:48,112 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:05:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:05:48,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:05:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:48,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:05:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:05:49,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:05:49,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 18 [2018-09-14 16:05:49,161 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:05:49,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:05:49,169 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:05:49,169 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:05:49,172 INFO L87 Difference]: Start difference. First operand 1617 states and 2344 transitions. Second operand 9 states. [2018-09-14 16:05:50,141 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:06:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:02,098 INFO L93 Difference]: Finished difference Result 14056 states and 27897 transitions. [2018-09-14 16:06:02,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-14 16:06:02,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 217 [2018-09-14 16:06:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:02,213 INFO L225 Difference]: With dead ends: 14056 [2018-09-14 16:06:02,213 INFO L226 Difference]: Without dead ends: 12445 [2018-09-14 16:06:02,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2018-09-14 16:06:02,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12445 states. [2018-09-14 16:06:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12445 to 11849. [2018-09-14 16:06:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11849 states. [2018-09-14 16:06:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 17234 transitions. [2018-09-14 16:06:02,815 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 17234 transitions. Word has length 217 [2018-09-14 16:06:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:02,816 INFO L480 AbstractCegarLoop]: Abstraction has 11849 states and 17234 transitions. [2018-09-14 16:06:02,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:06:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 17234 transitions. [2018-09-14 16:06:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-14 16:06:02,863 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:02,863 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:02,863 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 223401130, now seen corresponding path program 1 times [2018-09-14 16:06:02,864 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:02,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:02,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:02,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:02,865 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:03,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:03,339 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:03,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:03,348 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:03,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:03,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:04,108 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:06:04,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:06:04,108 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:04,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:04,109 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:04,109 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:04,111 INFO L87 Difference]: Start difference. First operand 11849 states and 17234 transitions. Second operand 3 states. [2018-09-14 16:06:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:06,378 INFO L93 Difference]: Finished difference Result 23629 states and 34272 transitions. [2018-09-14 16:06:06,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:06,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-09-14 16:06:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:06,452 INFO L225 Difference]: With dead ends: 23629 [2018-09-14 16:06:06,452 INFO L226 Difference]: Without dead ends: 15038 [2018-09-14 16:06:06,490 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 474 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15038 states. [2018-09-14 16:06:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15038 to 14818. [2018-09-14 16:06:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14818 states. [2018-09-14 16:06:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14818 states to 14818 states and 21355 transitions. [2018-09-14 16:06:06,904 INFO L78 Accepts]: Start accepts. Automaton has 14818 states and 21355 transitions. Word has length 238 [2018-09-14 16:06:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:06,904 INFO L480 AbstractCegarLoop]: Abstraction has 14818 states and 21355 transitions. [2018-09-14 16:06:06,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 14818 states and 21355 transitions. [2018-09-14 16:06:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-14 16:06:06,962 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:06,962 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:06,962 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1880356106, now seen corresponding path program 1 times [2018-09-14 16:06:06,963 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:06,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:06,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:06,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:06,964 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:07,307 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:06:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:07,697 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:06:07,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:06:07,697 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:07,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:06:07,698 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:06:07,698 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:06:07,699 INFO L87 Difference]: Start difference. First operand 14818 states and 21355 transitions. Second operand 6 states. [2018-09-14 16:06:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:10,313 INFO L93 Difference]: Finished difference Result 28934 states and 42090 transitions. [2018-09-14 16:06:10,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:06:10,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 248 [2018-09-14 16:06:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:10,377 INFO L225 Difference]: With dead ends: 28934 [2018-09-14 16:06:10,378 INFO L226 Difference]: Without dead ends: 14142 [2018-09-14 16:06:10,410 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:06:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14142 states. [2018-09-14 16:06:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14142 to 13981. [2018-09-14 16:06:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13981 states. [2018-09-14 16:06:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13981 states to 13981 states and 18515 transitions. [2018-09-14 16:06:10,750 INFO L78 Accepts]: Start accepts. Automaton has 13981 states and 18515 transitions. Word has length 248 [2018-09-14 16:06:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:10,750 INFO L480 AbstractCegarLoop]: Abstraction has 13981 states and 18515 transitions. [2018-09-14 16:06:10,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:06:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 13981 states and 18515 transitions. [2018-09-14 16:06:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-14 16:06:10,800 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:10,800 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:06:10,800 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash 809215646, now seen corresponding path program 1 times [2018-09-14 16:06:10,801 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:10,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:10,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:10,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:10,802 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:06:11,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:11,323 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:11,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:11,340 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:11,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-14 16:06:12,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:06:12,691 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:06:12,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-14 16:06:12,692 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:12,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:06:12,693 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:06:12,693 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:06:12,693 INFO L87 Difference]: Start difference. First operand 13981 states and 18515 transitions. Second operand 5 states. [2018-09-14 16:06:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:14,622 INFO L93 Difference]: Finished difference Result 34014 states and 46251 transitions. [2018-09-14 16:06:14,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:06:14,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 286 [2018-09-14 16:06:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:14,685 INFO L225 Difference]: With dead ends: 34014 [2018-09-14 16:06:14,685 INFO L226 Difference]: Without dead ends: 20069 [2018-09-14 16:06:14,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:06:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2018-09-14 16:06:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 19774. [2018-09-14 16:06:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19774 states. [2018-09-14 16:06:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 25460 transitions. [2018-09-14 16:06:15,148 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 25460 transitions. Word has length 286 [2018-09-14 16:06:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:15,148 INFO L480 AbstractCegarLoop]: Abstraction has 19774 states and 25460 transitions. [2018-09-14 16:06:15,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:06:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 25460 transitions. [2018-09-14 16:06:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-09-14 16:06:15,228 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:15,228 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:06:15,228 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1298758771, now seen corresponding path program 1 times [2018-09-14 16:06:15,229 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:15,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:15,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:15,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:15,230 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:06:15,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:15,740 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-14 16:06:15,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:15,756 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:15,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-14 16:06:16,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:06:16,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:16,182 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:16,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:16,199 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:16,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-14 16:06:16,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 125 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:17,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:17,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-14 16:06:17,199 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:17,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:06:17,200 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:06:17,200 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:06:17,200 INFO L87 Difference]: Start difference. First operand 19774 states and 25460 transitions. Second operand 6 states. [2018-09-14 16:06:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:18,249 INFO L93 Difference]: Finished difference Result 38932 states and 50002 transitions. [2018-09-14 16:06:18,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 16:06:18,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 295 [2018-09-14 16:06:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:18,291 INFO L225 Difference]: With dead ends: 38932 [2018-09-14 16:06:18,291 INFO L226 Difference]: Without dead ends: 19219 [2018-09-14 16:06:18,319 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1170 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:06:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2018-09-14 16:06:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 19219. [2018-09-14 16:06:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19219 states. [2018-09-14 16:06:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19219 states to 19219 states and 24217 transitions. [2018-09-14 16:06:18,664 INFO L78 Accepts]: Start accepts. Automaton has 19219 states and 24217 transitions. Word has length 295 [2018-09-14 16:06:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:18,664 INFO L480 AbstractCegarLoop]: Abstraction has 19219 states and 24217 transitions. [2018-09-14 16:06:18,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:06:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 19219 states and 24217 transitions. [2018-09-14 16:06:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-14 16:06:18,701 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:18,702 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:18,702 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1287978722, now seen corresponding path program 1 times [2018-09-14 16:06:18,702 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:18,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:18,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:18,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:18,704 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 134 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:19,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:19,037 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:19,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:19,046 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:19,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-14 16:06:19,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 134 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:19,658 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:06:19,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-14 16:06:19,658 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:19,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:06:19,659 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:06:19,659 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:06:19,660 INFO L87 Difference]: Start difference. First operand 19219 states and 24217 transitions. Second operand 6 states. [2018-09-14 16:06:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:21,916 INFO L93 Difference]: Finished difference Result 34955 states and 44773 transitions. [2018-09-14 16:06:21,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:06:21,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 326 [2018-09-14 16:06:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:21,989 INFO L225 Difference]: With dead ends: 34955 [2018-09-14 16:06:21,990 INFO L226 Difference]: Without dead ends: 19601 [2018-09-14 16:06:22,018 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 644 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:06:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2018-09-14 16:06:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 19325. [2018-09-14 16:06:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19325 states. [2018-09-14 16:06:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19325 states to 19325 states and 24254 transitions. [2018-09-14 16:06:22,457 INFO L78 Accepts]: Start accepts. Automaton has 19325 states and 24254 transitions. Word has length 326 [2018-09-14 16:06:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:22,457 INFO L480 AbstractCegarLoop]: Abstraction has 19325 states and 24254 transitions. [2018-09-14 16:06:22,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:06:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19325 states and 24254 transitions. [2018-09-14 16:06:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-14 16:06:22,494 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:22,495 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:22,495 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1061979147, now seen corresponding path program 1 times [2018-09-14 16:06:22,495 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:22,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:22,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:22,497 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 138 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:23,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:23,283 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:23,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:23,304 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:23,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-14 16:06:23,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 138 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:23,891 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:06:23,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:06:23,891 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:23,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:06:23,892 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:06:23,892 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:06:23,892 INFO L87 Difference]: Start difference. First operand 19325 states and 24254 transitions. Second operand 5 states. [2018-09-14 16:06:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:26,254 INFO L93 Difference]: Finished difference Result 50128 states and 63235 transitions. [2018-09-14 16:06:26,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:06:26,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2018-09-14 16:06:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:26,324 INFO L225 Difference]: With dead ends: 50128 [2018-09-14 16:06:26,324 INFO L226 Difference]: Without dead ends: 30824 [2018-09-14 16:06:26,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 651 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:06:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30824 states. [2018-09-14 16:06:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30824 to 28508. [2018-09-14 16:06:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28508 states. [2018-09-14 16:06:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28508 states to 28508 states and 35542 transitions. [2018-09-14 16:06:27,267 INFO L78 Accepts]: Start accepts. Automaton has 28508 states and 35542 transitions. Word has length 328 [2018-09-14 16:06:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:27,268 INFO L480 AbstractCegarLoop]: Abstraction has 28508 states and 35542 transitions. [2018-09-14 16:06:27,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:06:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 28508 states and 35542 transitions. [2018-09-14 16:06:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-09-14 16:06:27,310 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:27,310 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:27,311 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash -509630049, now seen corresponding path program 1 times [2018-09-14 16:06:27,311 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:27,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:27,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:27,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:27,312 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:27,739 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 9 [2018-09-14 16:06:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:27,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:27,862 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:27,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:27,874 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:28,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-14 16:06:28,346 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:28,705 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2018-09-14 16:06:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 153 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:29,075 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:06:29,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:06:29,076 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:29,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:06:29,077 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:06:29,077 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:06:29,078 INFO L87 Difference]: Start difference. First operand 28508 states and 35542 transitions. Second operand 5 states. [2018-09-14 16:06:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:31,309 INFO L93 Difference]: Finished difference Result 48544 states and 60157 transitions. [2018-09-14 16:06:31,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:06:31,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 343 [2018-09-14 16:06:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:31,367 INFO L225 Difference]: With dead ends: 48544 [2018-09-14 16:06:31,368 INFO L226 Difference]: Without dead ends: 23370 [2018-09-14 16:06:31,406 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:06:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23370 states. [2018-09-14 16:06:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23370 to 23105. [2018-09-14 16:06:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23105 states. [2018-09-14 16:06:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23105 states to 23105 states and 27495 transitions. [2018-09-14 16:06:31,827 INFO L78 Accepts]: Start accepts. Automaton has 23105 states and 27495 transitions. Word has length 343 [2018-09-14 16:06:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:31,827 INFO L480 AbstractCegarLoop]: Abstraction has 23105 states and 27495 transitions. [2018-09-14 16:06:31,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:06:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 23105 states and 27495 transitions. [2018-09-14 16:06:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-09-14 16:06:31,859 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:31,860 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:31,860 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1861984996, now seen corresponding path program 1 times [2018-09-14 16:06:31,861 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:31,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:31,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:31,862 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:32,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:32,579 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:32,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:32,586 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:32,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:06:32,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:06:33,013 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:06:33,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:06:33,014 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:33,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:33,014 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:33,014 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:33,015 INFO L87 Difference]: Start difference. First operand 23105 states and 27495 transitions. Second operand 3 states. [2018-09-14 16:06:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:34,307 INFO L93 Difference]: Finished difference Result 46596 states and 55737 transitions. [2018-09-14 16:06:34,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:34,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2018-09-14 16:06:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:34,351 INFO L225 Difference]: With dead ends: 46596 [2018-09-14 16:06:34,351 INFO L226 Difference]: Without dead ends: 23517 [2018-09-14 16:06:34,375 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23517 states. [2018-09-14 16:06:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23517 to 23457. [2018-09-14 16:06:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23457 states. [2018-09-14 16:06:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23457 states to 23457 states and 27713 transitions. [2018-09-14 16:06:34,799 INFO L78 Accepts]: Start accepts. Automaton has 23457 states and 27713 transitions. Word has length 349 [2018-09-14 16:06:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:34,800 INFO L480 AbstractCegarLoop]: Abstraction has 23457 states and 27713 transitions. [2018-09-14 16:06:34,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23457 states and 27713 transitions. [2018-09-14 16:06:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-09-14 16:06:34,833 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:34,833 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:34,833 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:34,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1558084176, now seen corresponding path program 1 times [2018-09-14 16:06:34,834 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:34,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:34,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:34,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:34,837 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 197 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:06:35,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:35,214 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:35,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:35,222 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:35,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-14 16:06:35,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:35,972 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2018-09-14 16:06:36,654 WARN L178 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 16:06:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 197 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:06:36,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:36,857 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:36,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:36,874 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:37,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-14 16:06:37,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:38,180 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-14 16:06:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:38,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:38,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 19 [2018-09-14 16:06:38,502 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:38,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:06:38,503 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:06:38,503 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:06:38,503 INFO L87 Difference]: Start difference. First operand 23457 states and 27713 transitions. Second operand 7 states. [2018-09-14 16:06:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:42,924 INFO L93 Difference]: Finished difference Result 47812 states and 61582 transitions. [2018-09-14 16:06:42,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 16:06:42,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 365 [2018-09-14 16:06:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:43,007 INFO L225 Difference]: With dead ends: 47812 [2018-09-14 16:06:43,007 INFO L226 Difference]: Without dead ends: 29599 [2018-09-14 16:06:43,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1478 GetRequests, 1453 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-09-14 16:06:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29599 states. [2018-09-14 16:06:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29599 to 28198. [2018-09-14 16:06:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28198 states. [2018-09-14 16:06:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28198 states to 28198 states and 32898 transitions. [2018-09-14 16:06:43,657 INFO L78 Accepts]: Start accepts. Automaton has 28198 states and 32898 transitions. Word has length 365 [2018-09-14 16:06:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:43,657 INFO L480 AbstractCegarLoop]: Abstraction has 28198 states and 32898 transitions. [2018-09-14 16:06:43,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:06:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28198 states and 32898 transitions. [2018-09-14 16:06:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-09-14 16:06:43,686 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:43,686 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:43,686 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1397726250, now seen corresponding path program 1 times [2018-09-14 16:06:43,687 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:43,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:43,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:43,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:43,687 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:44,027 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:06:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 189 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:06:44,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:44,575 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:44,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:44,583 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:44,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-09-14 16:06:45,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 183 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:06:45,604 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:06:45,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-14 16:06:45,604 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:45,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:06:45,605 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:06:45,605 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:06:45,605 INFO L87 Difference]: Start difference. First operand 28198 states and 32898 transitions. Second operand 5 states. [2018-09-14 16:06:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:47,661 INFO L93 Difference]: Finished difference Result 65829 states and 76083 transitions. [2018-09-14 16:06:47,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:06:47,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 376 [2018-09-14 16:06:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:47,738 INFO L225 Difference]: With dead ends: 65829 [2018-09-14 16:06:47,738 INFO L226 Difference]: Without dead ends: 42300 [2018-09-14 16:06:47,771 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 746 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:06:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42300 states. [2018-09-14 16:06:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42300 to 42107. [2018-09-14 16:06:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42107 states. [2018-09-14 16:06:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42107 states to 42107 states and 48130 transitions. [2018-09-14 16:06:48,523 INFO L78 Accepts]: Start accepts. Automaton has 42107 states and 48130 transitions. Word has length 376 [2018-09-14 16:06:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:48,523 INFO L480 AbstractCegarLoop]: Abstraction has 42107 states and 48130 transitions. [2018-09-14 16:06:48,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:06:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 42107 states and 48130 transitions. [2018-09-14 16:06:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-14 16:06:48,582 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:48,583 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:48,583 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash -542953889, now seen corresponding path program 1 times [2018-09-14 16:06:48,584 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:48,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:48,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:48,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:48,585 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:49,369 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 16:06:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 262 proven. 38 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-09-14 16:06:49,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:49,716 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:49,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:49,738 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:49,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 274 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:06:50,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 208 proven. 68 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:06:50,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:50,740 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:51,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:51,029 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:51,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 270 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:06:52,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 208 proven. 68 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-09-14 16:06:52,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:52,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 9, 8] total 25 [2018-09-14 16:06:52,619 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:52,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:06:52,620 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:06:52,620 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2018-09-14 16:06:52,621 INFO L87 Difference]: Start difference. First operand 42107 states and 48130 transitions. Second operand 12 states. [2018-09-14 16:07:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:04,034 INFO L93 Difference]: Finished difference Result 139886 states and 170690 transitions. [2018-09-14 16:07:04,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-14 16:07:04,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 388 [2018-09-14 16:07:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:04,390 INFO L225 Difference]: With dead ends: 139886 [2018-09-14 16:07:04,391 INFO L226 Difference]: Without dead ends: 97800 [2018-09-14 16:07:04,479 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1688 GetRequests, 1597 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1233, Invalid=7139, Unknown=0, NotChecked=0, Total=8372 [2018-09-14 16:07:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97800 states. [2018-09-14 16:07:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97800 to 93208. [2018-09-14 16:07:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93208 states. [2018-09-14 16:07:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93208 states to 93208 states and 104577 transitions. [2018-09-14 16:07:06,550 INFO L78 Accepts]: Start accepts. Automaton has 93208 states and 104577 transitions. Word has length 388 [2018-09-14 16:07:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:06,551 INFO L480 AbstractCegarLoop]: Abstraction has 93208 states and 104577 transitions. [2018-09-14 16:07:06,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:07:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 93208 states and 104577 transitions. [2018-09-14 16:07:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-09-14 16:07:06,614 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:06,614 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:06,614 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash -782830447, now seen corresponding path program 1 times [2018-09-14 16:07:06,615 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:06,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:06,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:06,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:06,616 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 221 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:07,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:07,235 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:07,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:07,244 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:07,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 259 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-14 16:07:07,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:08,080 WARN L178 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:07:08,841 WARN L178 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:07:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 221 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:09,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:09,044 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:07:09,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:09,060 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:09,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-09-14 16:07:10,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:10,921 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2018-09-14 16:07:11,158 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2018-09-14 16:07:11,308 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2018-09-14 16:07:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 215 proven. 101 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:07:12,295 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:07:12,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 8, 8, 8] total 30 [2018-09-14 16:07:12,295 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:12,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:07:12,296 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:07:12,297 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2018-09-14 16:07:12,297 INFO L87 Difference]: Start difference. First operand 93208 states and 104577 transitions. Second operand 7 states. [2018-09-14 16:07:12,736 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2018-09-14 16:07:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:15,827 INFO L93 Difference]: Finished difference Result 166110 states and 186507 transitions. [2018-09-14 16:07:15,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:07:15,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 408 [2018-09-14 16:07:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:16,007 INFO L225 Difference]: With dead ends: 166110 [2018-09-14 16:07:16,008 INFO L226 Difference]: Without dead ends: 93641 [2018-09-14 16:07:16,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1645 GetRequests, 1612 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2018-09-14 16:07:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93641 states. [2018-09-14 16:07:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93641 to 93641. [2018-09-14 16:07:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93641 states. [2018-09-14 16:07:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93641 states to 93641 states and 105025 transitions. [2018-09-14 16:07:17,742 INFO L78 Accepts]: Start accepts. Automaton has 93641 states and 105025 transitions. Word has length 408 [2018-09-14 16:07:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:17,743 INFO L480 AbstractCegarLoop]: Abstraction has 93641 states and 105025 transitions. [2018-09-14 16:07:17,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:07:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 93641 states and 105025 transitions. [2018-09-14 16:07:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-09-14 16:07:17,807 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:17,807 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:17,807 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash 695166582, now seen corresponding path program 1 times [2018-09-14 16:07:17,808 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:17,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:17,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:17,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:17,809 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 239 proven. 20 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-09-14 16:07:18,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:18,163 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:18,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:18,171 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:18,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 303 proven. 4 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-09-14 16:07:19,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 263 proven. 44 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-09-14 16:07:19,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:19,324 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:07:19,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:19,339 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:20,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2018-09-14 16:07:20,142 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 266 proven. 34 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-09-14 16:07:20,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:07:20,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 16 [2018-09-14 16:07:20,874 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:07:20,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-14 16:07:20,875 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-14 16:07:20,875 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:07:20,876 INFO L87 Difference]: Start difference. First operand 93641 states and 105025 transitions. Second operand 8 states. [2018-09-14 16:07:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:30,495 INFO L93 Difference]: Finished difference Result 248357 states and 299909 transitions. [2018-09-14 16:07:30,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-14 16:07:30,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 418 [2018-09-14 16:07:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:31,102 INFO L225 Difference]: With dead ends: 248357 [2018-09-14 16:07:31,102 INFO L226 Difference]: Without dead ends: 176278 [2018-09-14 16:07:31,200 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1715 GetRequests, 1678 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2018-09-14 16:07:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176278 states. [2018-09-14 16:07:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176278 to 168123. [2018-09-14 16:07:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168123 states. [2018-09-14 16:07:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168123 states to 168123 states and 187870 transitions. [2018-09-14 16:07:35,182 INFO L78 Accepts]: Start accepts. Automaton has 168123 states and 187870 transitions. Word has length 418 [2018-09-14 16:07:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:35,183 INFO L480 AbstractCegarLoop]: Abstraction has 168123 states and 187870 transitions. [2018-09-14 16:07:35,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-14 16:07:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 168123 states and 187870 transitions. [2018-09-14 16:07:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-09-14 16:07:35,286 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:35,286 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:07:35,286 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1023447660, now seen corresponding path program 1 times [2018-09-14 16:07:35,287 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:35,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:35,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:35,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:35,288 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:35,913 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:07:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 244 proven. 107 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-09-14 16:07:36,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:36,221 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:36,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:36,230 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:36,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 293 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-14 16:07:36,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:36,950 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2018-09-14 16:07:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 236 proven. 167 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-14 16:07:37,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:37,300 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 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:07:37,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:37,315 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:37,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 205 proven. 11 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-09-14 16:07:38,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:38,895 WARN L178 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-09-14 16:07:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 235 proven. 126 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:07:39,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:07:39,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 27 [2018-09-14 16:07:39,267 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:07:39,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:07:39,268 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:07:39,268 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2018-09-14 16:07:39,268 INFO L87 Difference]: Start difference. First operand 168123 states and 187870 transitions. Second operand 12 states. [2018-09-14 16:07:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:51,950 INFO L93 Difference]: Finished difference Result 325714 states and 377239 transitions. [2018-09-14 16:07:51,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-14 16:07:51,950 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 420 [2018-09-14 16:07:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:52,510 INFO L225 Difference]: With dead ends: 325714 [2018-09-14 16:07:52,510 INFO L226 Difference]: Without dead ends: 179055 [2018-09-14 16:07:52,703 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1771 GetRequests, 1701 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-09-14 16:07:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179055 states. [2018-09-14 16:07:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179055 to 173332. [2018-09-14 16:07:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173332 states. [2018-09-14 16:07:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173332 states to 173332 states and 192856 transitions. [2018-09-14 16:07:56,362 INFO L78 Accepts]: Start accepts. Automaton has 173332 states and 192856 transitions. Word has length 420 [2018-09-14 16:07:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:56,363 INFO L480 AbstractCegarLoop]: Abstraction has 173332 states and 192856 transitions. [2018-09-14 16:07:56,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:07:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 173332 states and 192856 transitions. [2018-09-14 16:07:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-09-14 16:07:56,465 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:56,466 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:07:56,466 INFO L423 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash -145355276, now seen corresponding path program 1 times [2018-09-14 16:07:56,467 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:56,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:56,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:56,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:56,467 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 258 proven. 101 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-09-14 16:07:56,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:56,925 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:56,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:56,934 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:57,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-09-14 16:07:57,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:01,600 WARN L178 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 16:08:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 243 proven. 146 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:08:01,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:01,901 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 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:08:01,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:01,917 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:02,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-09-14 16:08:02,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 243 proven. 146 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:08:03,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:08:03,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 24 [2018-09-14 16:08:03,149 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:08:03,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:08:03,151 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:08:03,151 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2018-09-14 16:08:03,151 INFO L87 Difference]: Start difference. First operand 173332 states and 192856 transitions. Second operand 12 states. [2018-09-14 16:08:03,395 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 16:08:11,283 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 16:08:16,798 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 16:08:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:21,538 INFO L93 Difference]: Finished difference Result 476374 states and 541201 transitions. [2018-09-14 16:08:21,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-14 16:08:21,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 424 [2018-09-14 16:08:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:22,057 INFO L225 Difference]: With dead ends: 476374 [2018-09-14 16:08:22,058 INFO L226 Difference]: Without dead ends: 245887 [2018-09-14 16:08:22,261 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 1754 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1417, Invalid=8885, Unknown=0, NotChecked=0, Total=10302 [2018-09-14 16:08:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245887 states. [2018-09-14 16:08:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245887 to 223825. [2018-09-14 16:08:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223825 states. [2018-09-14 16:08:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223825 states to 223825 states and 239167 transitions. [2018-09-14 16:08:26,166 INFO L78 Accepts]: Start accepts. Automaton has 223825 states and 239167 transitions. Word has length 424 [2018-09-14 16:08:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:26,167 INFO L480 AbstractCegarLoop]: Abstraction has 223825 states and 239167 transitions. [2018-09-14 16:08:26,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:08:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 223825 states and 239167 transitions. [2018-09-14 16:08:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-14 16:08:26,247 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:08:26,248 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 16:08:26,248 INFO L423 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:08:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash 90470354, now seen corresponding path program 1 times [2018-09-14 16:08:26,248 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:08:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:26,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:26,249 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:08:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:26,626 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:08:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 296 proven. 174 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:08:26,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:26,798 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:08:26,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:26,805 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:27,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-14 16:08:27,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 298 proven. 163 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-14 16:08:28,188 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:08:28,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2018-09-14 16:08:28,188 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:08:28,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:08:28,189 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:08:28,189 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:08:28,189 INFO L87 Difference]: Start difference. First operand 223825 states and 239167 transitions. Second operand 5 states. [2018-09-14 16:08:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:34,826 INFO L93 Difference]: Finished difference Result 648791 states and 702474 transitions. [2018-09-14 16:08:34,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:08:34,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2018-09-14 16:08:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:35,847 INFO L225 Difference]: With dead ends: 648791 [2018-09-14 16:08:35,848 INFO L226 Difference]: Without dead ends: 427095 [2018-09-14 16:08:36,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 958 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:08:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427095 states. [2018-09-14 16:08:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427095 to 421876. [2018-09-14 16:08:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421876 states. [2018-09-14 16:08:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421876 states to 421876 states and 451002 transitions. [2018-09-14 16:08:44,854 INFO L78 Accepts]: Start accepts. Automaton has 421876 states and 451002 transitions. Word has length 483 [2018-09-14 16:08:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:44,854 INFO L480 AbstractCegarLoop]: Abstraction has 421876 states and 451002 transitions. [2018-09-14 16:08:44,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:08:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 421876 states and 451002 transitions. [2018-09-14 16:08:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-09-14 16:08:44,946 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:08:44,947 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:08:44,947 INFO L423 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:08:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1167744579, now seen corresponding path program 1 times [2018-09-14 16:08:44,947 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:08:44,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:44,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:44,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:44,948 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:08:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:45,346 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:08:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 300 proven. 194 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:08:45,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:45,714 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:08:45,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:45,722 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:45,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 386 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-14 16:08:46,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:46,574 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:08:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 300 proven. 194 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:08:47,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:47,080 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 28 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 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:08:47,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:47,095 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:47,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-09-14 16:08:53,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:54,398 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 13 Received shutdown request... [2018-09-14 16:08:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 294 proven. 149 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-14 16:08:55,085 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:08:55,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8, 8, 5] total 26 [2018-09-14 16:08:55,086 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:08:55,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:08:55,086 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:08:55,087 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2018-09-14 16:08:55,087 INFO L87 Difference]: Start difference. First operand 421876 states and 451002 transitions. Second operand 5 states. [2018-09-14 16:08:55,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-14 16:08:55,088 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:08:55,093 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:08:55,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:08:55 BoogieIcfgContainer [2018-09-14 16:08:55,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:08:55,094 INFO L168 Benchmark]: Toolchain (without parser) took 213061.73 ms. Allocated memory was 1.5 GB in the beginning and 5.5 GB in the end (delta: 4.0 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-14 16:08:55,095 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:08:55,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1174.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:55,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 145.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:55,097 INFO L168 Benchmark]: Boogie Preprocessor took 373.85 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -922.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:55,098 INFO L168 Benchmark]: RCFGBuilder took 5299.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 259.8 MB). Peak memory consumption was 259.8 MB. Max. memory is 7.1 GB. [2018-09-14 16:08:55,098 INFO L168 Benchmark]: TraceAbstraction took 206061.12 ms. Allocated memory was 2.3 GB in the beginning and 5.5 GB in the end (delta: 3.2 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-14 16:08:55,105 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1174.47 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 145.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 373.85 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -922.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5299.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 259.8 MB). Peak memory consumption was 259.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206061.12 ms. Allocated memory was 2.3 GB in the beginning and 5.5 GB in the end (delta: 3.2 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1566]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1566). Cancelled while BasicCegarLoop was constructing difference of abstraction (421876states) and FLOYD_HOARE automaton (currently 2 states, 5 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 205.9s OverallTime, 23 OverallIterations, 6 TraceHistogramMax, 116.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4411 SDtfs, 34298 SDslu, 5573 SDs, 0 SdLazy, 51623 SolverSat, 11377 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20205 GetRequests, 19624 SyntacticMatches, 35 SemanticMatches, 546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8695 ImplicationChecksByTransitivity, 24.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=421876occurred in iteration=22, 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: 29.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 52123 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 43.7s InterpolantComputationTime, 17162 NumberOfCodeBlocks, 17162 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 26863 ConstructedInterpolants, 0 QuantifiedInterpolants, 32681460 SizeOfPredicates, 177 NumberOfNonLiveVariables, 36259 ConjunctsInSsa, 518 ConjunctsInUnsatCore, 77 InterpolantComputations, 19 PerfectInterpolantSequences, 17466/20647 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_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-08-55-119.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-08-55-119.csv Completed graceful shutdown