java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 11:01:07,932 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 11:01:07,938 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 11:01:07,953 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 11:01:07,953 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 11:01:07,954 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 11:01:07,956 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 11:01:07,959 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 11:01:07,961 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 11:01:07,962 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 11:01:07,963 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 11:01:07,963 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 11:01:07,964 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 11:01:07,965 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 11:01:07,966 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 11:01:07,967 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 11:01:07,968 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 11:01:07,969 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 11:01:07,971 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 11:01:07,973 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 11:01:07,974 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 11:01:07,975 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 11:01:07,978 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 11:01:07,978 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 11:01:07,978 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 11:01:07,979 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 11:01:07,980 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 11:01:07,981 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 11:01:07,982 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 11:01:07,983 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 11:01:07,983 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 11:01:07,984 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 11:01:07,984 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 11:01:07,984 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 11:01:07,985 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 11:01:07,986 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 11:01:07,987 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 [2018-07-24 11:01:08,004 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 11:01:08,004 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 11:01:08,005 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 11:01:08,005 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 11:01:08,005 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 11:01:08,006 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 11:01:08,006 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 11:01:08,006 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 11:01:08,006 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 11:01:08,006 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 11:01:08,007 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 11:01:08,007 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 11:01:08,007 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 11:01:08,008 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 11:01:08,008 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 11:01:08,008 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 11:01:08,008 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 11:01:08,008 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 11:01:08,009 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 11:01:08,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 11:01:08,009 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 11:01:08,009 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 11:01:08,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 11:01:08,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 11:01:08,010 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 11:01:08,010 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 11:01:08,010 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 11:01:08,011 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 11:01:08,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 11:01:08,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 11:01:08,011 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 11:01:08,011 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 11:01:08,012 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 11:01:08,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 11:01:08,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 11:01:08,078 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 11:01:08,080 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 11:01:08,080 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 11:01:08,081 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09_false-unreach-call.c [2018-07-24 11:01:08,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6891fd2c8/89fd1eea6ae24651b5e91d1a099f3559/FLAG98d14b726 [2018-07-24 11:01:08,781 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 11:01:08,782 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label09_false-unreach-call.c [2018-07-24 11:01:08,809 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6891fd2c8/89fd1eea6ae24651b5e91d1a099f3559/FLAG98d14b726 [2018-07-24 11:01:08,832 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6891fd2c8/89fd1eea6ae24651b5e91d1a099f3559 [2018-07-24 11:01:08,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 11:01:08,846 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 11:01:08,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 11:01:08,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 11:01:08,858 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 11:01:08,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:01:08" (1/1) ... [2018-07-24 11:01:08,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a84b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:08, skipping insertion in model container [2018-07-24 11:01:08,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 11:01:08" (1/1) ... [2018-07-24 11:01:09,151 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 11:01:09,655 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:01:09,673 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 11:01:09,975 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 11:01:10,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10 WrapperNode [2018-07-24 11:01:10,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 11:01:10,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 11:01:10,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 11:01:10,041 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 11:01:10,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 11:01:10,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 11:01:10,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 11:01:10,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 11:01:10,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (1/1) ... [2018-07-24 11:01:10,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 11:01:10,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 11:01:10,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 11:01:10,595 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 11:01:10,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (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 [2018-07-24 11:01:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 11:01:10,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 11:01:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 11:01:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 11:01:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 11:01:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 11:01:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:01:10,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 11:01:15,294 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 11:01:15,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:01:15 BoogieIcfgContainer [2018-07-24 11:01:15,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 11:01:15,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 11:01:15,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 11:01:15,300 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 11:01:15,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 11:01:08" (1/3) ... [2018-07-24 11:01:15,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263145e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:01:15, skipping insertion in model container [2018-07-24 11:01:15,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 11:01:10" (2/3) ... [2018-07-24 11:01:15,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263145e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 11:01:15, skipping insertion in model container [2018-07-24 11:01:15,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 11:01:15" (3/3) ... [2018-07-24 11:01:15,304 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label09_false-unreach-call.c [2018-07-24 11:01:15,314 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 11:01:15,323 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 11:01:15,379 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 11:01:15,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 11:01:15,380 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 11:01:15,380 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 11:01:15,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 11:01:15,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 11:01:15,381 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 11:01:15,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 11:01:15,381 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 11:01:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 11:01:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-07-24 11:01:15,438 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:15,439 INFO L353 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] [2018-07-24 11:01:15,440 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash -876891420, now seen corresponding path program 1 times [2018-07-24 11:01:15,449 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:15,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:15,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:15,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:15,507 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:16,424 WARN L169 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:01:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:16,638 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:16,638 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 11:01:16,639 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:16,644 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 11:01:16,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 11:01:16,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:01:16,661 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-07-24 11:01:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:20,341 INFO L93 Difference]: Finished difference Result 1066 states and 1924 transitions. [2018-07-24 11:01:20,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 11:01:20,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2018-07-24 11:01:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:20,369 INFO L225 Difference]: With dead ends: 1066 [2018-07-24 11:01:20,369 INFO L226 Difference]: Without dead ends: 748 [2018-07-24 11:01:20,377 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 11:01:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-07-24 11:01:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 527. [2018-07-24 11:01:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-07-24 11:01:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 902 transitions. [2018-07-24 11:01:20,464 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 902 transitions. Word has length 155 [2018-07-24 11:01:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:20,465 INFO L471 AbstractCegarLoop]: Abstraction has 527 states and 902 transitions. [2018-07-24 11:01:20,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 11:01:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 902 transitions. [2018-07-24 11:01:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-24 11:01:20,472 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:20,473 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:20,473 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1007699939, now seen corresponding path program 1 times [2018-07-24 11:01:20,473 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:20,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:20,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:20,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:20,475 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:20,734 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-07-24 11:01:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:20,877 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:20,877 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:01:20,877 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:20,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:01:20,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:01:20,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:01:20,880 INFO L87 Difference]: Start difference. First operand 527 states and 902 transitions. Second operand 6 states. [2018-07-24 11:01:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:24,505 INFO L93 Difference]: Finished difference Result 1632 states and 2920 transitions. [2018-07-24 11:01:24,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 11:01:24,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2018-07-24 11:01:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:24,522 INFO L225 Difference]: With dead ends: 1632 [2018-07-24 11:01:24,523 INFO L226 Difference]: Without dead ends: 1111 [2018-07-24 11:01:24,529 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:01:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2018-07-24 11:01:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1054. [2018-07-24 11:01:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2018-07-24 11:01:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1723 transitions. [2018-07-24 11:01:24,598 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1723 transitions. Word has length 165 [2018-07-24 11:01:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:24,598 INFO L471 AbstractCegarLoop]: Abstraction has 1054 states and 1723 transitions. [2018-07-24 11:01:24,598 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:01:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1723 transitions. [2018-07-24 11:01:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-07-24 11:01:24,603 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:24,603 INFO L353 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] [2018-07-24 11:01:24,604 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1096522296, now seen corresponding path program 1 times [2018-07-24 11:01:24,604 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:24,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:24,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:24,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:24,606 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:24,963 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:24,964 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:24,964 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:24,964 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:24,965 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:24,965 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:24,967 INFO L87 Difference]: Start difference. First operand 1054 states and 1723 transitions. Second operand 3 states. [2018-07-24 11:01:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:28,262 INFO L93 Difference]: Finished difference Result 3045 states and 5125 transitions. [2018-07-24 11:01:28,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:28,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2018-07-24 11:01:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:28,287 INFO L225 Difference]: With dead ends: 3045 [2018-07-24 11:01:28,287 INFO L226 Difference]: Without dead ends: 1997 [2018-07-24 11:01:28,293 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-07-24 11:01:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-07-24 11:01:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-07-24 11:01:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3207 transitions. [2018-07-24 11:01:28,380 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3207 transitions. Word has length 168 [2018-07-24 11:01:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:28,381 INFO L471 AbstractCegarLoop]: Abstraction has 1975 states and 3207 transitions. [2018-07-24 11:01:28,381 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3207 transitions. [2018-07-24 11:01:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-07-24 11:01:28,393 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:28,393 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 11:01:28,393 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash -923385031, now seen corresponding path program 1 times [2018-07-24 11:01:28,394 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:28,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:28,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:28,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:28,397 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:28,666 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:01:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:01:28,768 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:28,768 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 11:01:28,768 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:28,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 11:01:28,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 11:01:28,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 11:01:28,770 INFO L87 Difference]: Start difference. First operand 1975 states and 3207 transitions. Second operand 6 states. [2018-07-24 11:01:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:32,280 INFO L93 Difference]: Finished difference Result 5737 states and 10032 transitions. [2018-07-24 11:01:32,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 11:01:32,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2018-07-24 11:01:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:32,314 INFO L225 Difference]: With dead ends: 5737 [2018-07-24 11:01:32,314 INFO L226 Difference]: Without dead ends: 3768 [2018-07-24 11:01:32,323 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 11:01:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2018-07-24 11:01:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3706. [2018-07-24 11:01:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3706 states. [2018-07-24 11:01:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5820 transitions. [2018-07-24 11:01:32,465 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5820 transitions. Word has length 179 [2018-07-24 11:01:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:32,466 INFO L471 AbstractCegarLoop]: Abstraction has 3706 states and 5820 transitions. [2018-07-24 11:01:32,466 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 11:01:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5820 transitions. [2018-07-24 11:01:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-07-24 11:01:32,477 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:32,477 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2018-07-24 11:01:32,478 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1249582441, now seen corresponding path program 1 times [2018-07-24 11:01:32,478 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:32,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:32,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:32,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:32,479 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:32,743 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 11:01:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:01:32,773 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:32,773 INFO L191 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 [2018-07-24 11:01:32,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:32,783 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:33,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 11:01:33,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:01:34,200 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 11:01:34,201 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 11:01:34,201 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:34,201 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:01:34,202 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:01:34,202 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-07-24 11:01:34,203 INFO L87 Difference]: Start difference. First operand 3706 states and 5820 transitions. Second operand 5 states. [2018-07-24 11:01:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:37,217 INFO L93 Difference]: Finished difference Result 11515 states and 19515 transitions. [2018-07-24 11:01:37,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:01:37,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2018-07-24 11:01:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:37,267 INFO L225 Difference]: With dead ends: 11515 [2018-07-24 11:01:37,267 INFO L226 Difference]: Without dead ends: 7815 [2018-07-24 11:01:37,293 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 374 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-07-24 11:01:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7815 states. [2018-07-24 11:01:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7815 to 7462. [2018-07-24 11:01:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7462 states. [2018-07-24 11:01:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7462 states to 7462 states and 11507 transitions. [2018-07-24 11:01:37,585 INFO L78 Accepts]: Start accepts. Automaton has 7462 states and 11507 transitions. Word has length 190 [2018-07-24 11:01:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:37,585 INFO L471 AbstractCegarLoop]: Abstraction has 7462 states and 11507 transitions. [2018-07-24 11:01:37,585 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:01:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7462 states and 11507 transitions. [2018-07-24 11:01:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-07-24 11:01:37,607 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:37,608 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:37,608 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash -802622098, now seen corresponding path program 1 times [2018-07-24 11:01:37,609 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:37,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:37,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:37,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:37,610 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 11:01:38,104 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 11:01:38,104 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 11:01:38,105 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:38,105 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:38,105 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:38,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:38,106 INFO L87 Difference]: Start difference. First operand 7462 states and 11507 transitions. Second operand 3 states. [2018-07-24 11:01:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:40,775 INFO L93 Difference]: Finished difference Result 17862 states and 28041 transitions. [2018-07-24 11:01:40,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:40,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-07-24 11:01:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:40,844 INFO L225 Difference]: With dead ends: 17862 [2018-07-24 11:01:40,844 INFO L226 Difference]: Without dead ends: 10406 [2018-07-24 11:01:40,872 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 11:01:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2018-07-24 11:01:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 10016. [2018-07-24 11:01:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10016 states. [2018-07-24 11:01:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10016 states to 10016 states and 15109 transitions. [2018-07-24 11:01:41,170 INFO L78 Accepts]: Start accepts. Automaton has 10016 states and 15109 transitions. Word has length 203 [2018-07-24 11:01:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:41,172 INFO L471 AbstractCegarLoop]: Abstraction has 10016 states and 15109 transitions. [2018-07-24 11:01:41,172 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10016 states and 15109 transitions. [2018-07-24 11:01:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-07-24 11:01:41,204 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:41,204 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 11:01:41,204 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash 195385483, now seen corresponding path program 1 times [2018-07-24 11:01:41,205 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:41,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:41,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:41,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:41,210 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 80 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 11:01:41,693 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:41,693 INFO L191 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 [2018-07-24 11:01:41,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:41,710 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:41,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:01:42,040 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:01:42,319 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:42,319 INFO L191 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 [2018-07-24 11:01:42,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:42,338 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:42,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 11:01:43,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 11:01:43,385 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 11:01:43,385 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 5, 5] total 17 [2018-07-24 11:01:43,385 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:43,386 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 11:01:43,386 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 11:01:43,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-07-24 11:01:43,387 INFO L87 Difference]: Start difference. First operand 10016 states and 15109 transitions. Second operand 5 states. [2018-07-24 11:01:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:45,856 INFO L93 Difference]: Finished difference Result 30281 states and 47497 transitions. [2018-07-24 11:01:45,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 11:01:45,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2018-07-24 11:01:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:45,959 INFO L225 Difference]: With dead ends: 30281 [2018-07-24 11:01:45,959 INFO L226 Difference]: Without dead ends: 20271 [2018-07-24 11:01:45,995 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 872 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-07-24 11:01:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20271 states. [2018-07-24 11:01:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20271 to 20039. [2018-07-24 11:01:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20039 states. [2018-07-24 11:01:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20039 states to 20039 states and 30227 transitions. [2018-07-24 11:01:46,615 INFO L78 Accepts]: Start accepts. Automaton has 20039 states and 30227 transitions. Word has length 221 [2018-07-24 11:01:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:46,615 INFO L471 AbstractCegarLoop]: Abstraction has 20039 states and 30227 transitions. [2018-07-24 11:01:46,616 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 11:01:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20039 states and 30227 transitions. [2018-07-24 11:01:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-24 11:01:46,668 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:46,668 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:46,668 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -927526524, now seen corresponding path program 1 times [2018-07-24 11:01:46,669 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:46,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:46,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:46,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:46,670 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 85 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 11:01:47,145 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:47,145 INFO L191 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 [2018-07-24 11:01:47,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:47,159 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:47,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:01:47,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:01:48,130 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 11:01:48,130 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-07-24 11:01:48,131 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 11:01:48,131 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 11:01:48,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 11:01:48,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 11:01:48,132 INFO L87 Difference]: Start difference. First operand 20039 states and 30227 transitions. Second operand 3 states. [2018-07-24 11:01:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:01:50,033 INFO L93 Difference]: Finished difference Result 56382 states and 85974 transitions. [2018-07-24 11:01:50,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 11:01:50,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2018-07-24 11:01:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:01:50,154 INFO L225 Difference]: With dead ends: 56382 [2018-07-24 11:01:50,155 INFO L226 Difference]: Without dead ends: 36349 [2018-07-24 11:01:50,204 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 450 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-07-24 11:01:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36349 states. [2018-07-24 11:01:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36349 to 36258. [2018-07-24 11:01:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36258 states. [2018-07-24 11:01:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36258 states to 36258 states and 52566 transitions. [2018-07-24 11:01:51,383 INFO L78 Accepts]: Start accepts. Automaton has 36258 states and 52566 transitions. Word has length 226 [2018-07-24 11:01:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:01:51,384 INFO L471 AbstractCegarLoop]: Abstraction has 36258 states and 52566 transitions. [2018-07-24 11:01:51,384 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 11:01:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 36258 states and 52566 transitions. [2018-07-24 11:01:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-24 11:01:51,480 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:01:51,480 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:01:51,480 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:01:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1744896657, now seen corresponding path program 1 times [2018-07-24 11:01:51,481 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:01:51,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:51,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:51,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:01:51,482 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:01:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 11:01:52,011 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:52,011 INFO L191 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 [2018-07-24 11:01:52,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:52,027 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:52,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:01:52,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:53,220 WARN L169 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-07-24 11:01:53,331 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 11:01:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 11:01:53,625 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:01:53,625 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:01:53,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:01:53,642 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:01:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:01:54,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:01:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-07-24 11:01:55,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:01:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 124 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 11:01:55,287 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:01:55,287 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 17 [2018-07-24 11:01:55,287 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:01:55,288 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 11:01:55,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 11:01:55,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-07-24 11:01:55,289 INFO L87 Difference]: Start difference. First operand 36258 states and 52566 transitions. Second operand 9 states. [2018-07-24 11:02:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:02:01,051 INFO L93 Difference]: Finished difference Result 127778 states and 193411 transitions. [2018-07-24 11:02:01,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 11:02:01,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 265 [2018-07-24 11:02:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 11:02:01,434 INFO L225 Difference]: With dead ends: 127778 [2018-07-24 11:02:01,434 INFO L226 Difference]: Without dead ends: 91526 [2018-07-24 11:02:01,549 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1051 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2018-07-24 11:02:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91526 states. [2018-07-24 11:02:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91526 to 90646. [2018-07-24 11:02:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90646 states. [2018-07-24 11:02:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90646 states to 90646 states and 123331 transitions. [2018-07-24 11:02:04,363 INFO L78 Accepts]: Start accepts. Automaton has 90646 states and 123331 transitions. Word has length 265 [2018-07-24 11:02:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 11:02:04,363 INFO L471 AbstractCegarLoop]: Abstraction has 90646 states and 123331 transitions. [2018-07-24 11:02:04,363 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 11:02:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 90646 states and 123331 transitions. [2018-07-24 11:02:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-07-24 11:02:04,434 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 11:02:04,434 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 11:02:04,434 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 11:02:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2050619254, now seen corresponding path program 1 times [2018-07-24 11:02:04,435 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 11:02:04,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:04,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:04,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 11:02:04,436 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 11:02:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 107 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:05,474 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:05,474 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 11:02:05,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:05,484 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:05,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:05,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:06,376 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 11:02:06,377 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 11:02:06,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 11:02:06,395 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 11:02:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 11:02:06,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 11:02:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 107 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:07,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 11:02:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 111 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 11:02:07,516 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 11:02:07,517 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 8, 8] total 25 [2018-07-24 11:02:07,517 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 11:02:07,518 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 11:02:07,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 11:02:07,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-07-24 11:02:07,518 INFO L87 Difference]: Start difference. First operand 90646 states and 123331 transitions. Second operand 14 states. [2018-07-24 11:02:08,541 WARN L169 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 11:02:26,267 WARN L169 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-07-24 11:02:28,585 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 11:02:32,644 WARN L169 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 11:04:07,790 WARN L169 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-07-24 11:04:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 11:04:40,470 INFO L93 Difference]: Finished difference Result 794787 states and 2527541 transitions. [2018-07-24 11:04:40,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2018-07-24 11:04:40,470 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 267 [2018-07-24 11:04:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown