java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:06:12,018 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:06:12,020 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:06:12,034 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:06:12,034 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:06:12,035 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:06:12,037 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:06:12,038 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:06:12,040 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:06:12,041 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:06:12,042 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:06:12,042 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:06:12,043 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:06:12,044 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:06:12,048 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:06:12,050 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:06:12,052 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:06:12,054 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:06:12,057 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:06:12,059 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:06:12,063 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:06:12,064 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:06:12,070 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:06:12,070 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:06:12,070 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:06:12,071 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:06:12,073 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:06:12,074 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:06:12,075 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:06:12,076 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:06:12,076 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:06:12,078 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:06:12,078 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:06:12,079 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:06:12,083 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:06:12,084 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:06:12,084 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 16:06:12,113 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:06:12,113 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:06:12,114 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:06:12,115 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:06:12,115 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:06:12,116 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:06:12,116 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:06:12,116 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:06:12,116 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:06:12,116 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:06:12,117 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:06:12,118 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:06:12,119 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:06:12,119 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:06:12,119 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:06:12,119 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:06:12,119 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:06:12,120 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:06:12,120 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:06:12,120 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:06:12,120 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:06:12,122 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:06:12,122 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:06:12,122 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:06:12,122 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:06:12,122 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:06:12,123 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:06:12,123 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:06:12,123 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:06:12,123 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:06:12,123 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:06:12,124 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:06:12,124 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:06:12,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:06:12,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:06:12,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:06:12,228 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:06:12,228 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:06:12,229 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c [2018-09-14 16:06:12,581 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3995144/503412baf0514a91950145471f481446/FLAG204007ed0 [2018-09-14 16:06:12,976 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:06:12,977 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label49_true-unreach-call.c [2018-09-14 16:06:12,998 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3995144/503412baf0514a91950145471f481446/FLAG204007ed0 [2018-09-14 16:06:13,014 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3995144/503412baf0514a91950145471f481446 [2018-09-14 16:06:13,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:06:13,029 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:06:13,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:06:13,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:06:13,038 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:06:13,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:06:13" (1/1) ... [2018-09-14 16:06:13,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b894ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:13, skipping insertion in model container [2018-09-14 16:06:13,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:06:13" (1/1) ... [2018-09-14 16:06:13,054 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:06:13,787 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:06:13,809 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:06:14,066 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:06:14,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14 WrapperNode [2018-09-14 16:06:14,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:06:14,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:06:14,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:06:14,146 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:06:14,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:06:14,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:06:14,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:06:14,321 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:06:14,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (1/1) ... [2018-09-14 16:06:14,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:06:14,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:06:14,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:06:14,686 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:06:14,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (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 16:06:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:06:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:06:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:06:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:06:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:06:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:06:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:06:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:06:20,154 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:06:20,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:06:20 BoogieIcfgContainer [2018-09-14 16:06:20,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:06:20,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:06:20,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:06:20,161 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:06:20,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:06:13" (1/3) ... [2018-09-14 16:06:20,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bc3f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:06:20, skipping insertion in model container [2018-09-14 16:06:20,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:06:14" (2/3) ... [2018-09-14 16:06:20,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bc3f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:06:20, skipping insertion in model container [2018-09-14 16:06:20,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:06:20" (3/3) ... [2018-09-14 16:06:20,167 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label49_true-unreach-call.c [2018-09-14 16:06:20,178 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:06:20,187 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:06:20,247 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:06:20,248 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:06:20,248 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:06:20,248 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:06:20,248 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:06:20,248 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:06:20,248 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:06:20,249 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:06:20,249 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:06:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:06:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-14 16:06:20,301 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:20,303 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:20,304 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:20,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1345868708, now seen corresponding path program 1 times [2018-09-14 16:06:20,313 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:20,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:20,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:20,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:20,367 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:21,233 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:06:21,456 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 16:06:21,458 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:06:21,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:06:21,459 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:21,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:21,483 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:21,484 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:06:21,486 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:06:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:23,645 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-09-14 16:06:23,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:23,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2018-09-14 16:06:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:23,673 INFO L225 Difference]: With dead ends: 844 [2018-09-14 16:06:23,676 INFO L226 Difference]: Without dead ends: 530 [2018-09-14 16:06:23,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:06:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-09-14 16:06:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-09-14 16:06:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-09-14 16:06:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-09-14 16:06:23,837 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 175 [2018-09-14 16:06:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:23,839 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-09-14 16:06:23,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-09-14 16:06:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-14 16:06:23,855 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:23,856 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:23,856 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:23,857 INFO L82 PathProgramCache]: Analyzing trace with hash 396212824, now seen corresponding path program 1 times [2018-09-14 16:06:23,857 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:23,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:23,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:23,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:23,859 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:24,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:24,467 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 16:06:24,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:24,554 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:24,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:24,959 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 16:06:24,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:25,454 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 16:06:25,491 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:06:25,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-14 16:06:25,492 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:25,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:25,493 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:25,494 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:06:25,494 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-09-14 16:06:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:27,985 INFO L93 Difference]: Finished difference Result 1465 states and 2486 transitions. [2018-09-14 16:06:27,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:27,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2018-09-14 16:06:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:27,996 INFO L225 Difference]: With dead ends: 1465 [2018-09-14 16:06:27,997 INFO L226 Difference]: Without dead ends: 946 [2018-09-14 16:06:28,001 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 376 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:06:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2018-09-14 16:06:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2018-09-14 16:06:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2018-09-14 16:06:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1412 transitions. [2018-09-14 16:06:28,042 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1412 transitions. Word has length 188 [2018-09-14 16:06:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:28,043 INFO L480 AbstractCegarLoop]: Abstraction has 944 states and 1412 transitions. [2018-09-14 16:06:28,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1412 transitions. [2018-09-14 16:06:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-14 16:06:28,050 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:28,050 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:28,051 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash -371681376, now seen corresponding path program 1 times [2018-09-14 16:06:28,051 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:28,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:28,053 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:28,339 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:06:28,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-14 16:06:28,339 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:28,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:06:28,340 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:06:28,340 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:28,340 INFO L87 Difference]: Start difference. First operand 944 states and 1412 transitions. Second operand 7 states. [2018-09-14 16:06:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:32,782 INFO L93 Difference]: Finished difference Result 2926 states and 4708 transitions. [2018-09-14 16:06:32,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:06:32,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2018-09-14 16:06:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:32,812 INFO L225 Difference]: With dead ends: 2926 [2018-09-14 16:06:32,813 INFO L226 Difference]: Without dead ends: 1988 [2018-09-14 16:06:32,818 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:06:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2018-09-14 16:06:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1894. [2018-09-14 16:06:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2018-09-14 16:06:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 2864 transitions. [2018-09-14 16:06:32,932 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 2864 transitions. Word has length 192 [2018-09-14 16:06:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:32,932 INFO L480 AbstractCegarLoop]: Abstraction has 1894 states and 2864 transitions. [2018-09-14 16:06:32,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:06:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 2864 transitions. [2018-09-14 16:06:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-14 16:06:32,941 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:32,941 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:32,942 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:32,942 INFO L82 PathProgramCache]: Analyzing trace with hash 551512485, now seen corresponding path program 1 times [2018-09-14 16:06:32,943 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:32,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:32,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:32,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:32,944 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:33,221 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:06:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:33,702 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:06:33,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:06:33,702 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:33,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:06:33,704 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:06:33,704 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:06:33,704 INFO L87 Difference]: Start difference. First operand 1894 states and 2864 transitions. Second operand 6 states. [2018-09-14 16:06:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:37,089 INFO L93 Difference]: Finished difference Result 5784 states and 9437 transitions. [2018-09-14 16:06:37,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:06:37,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2018-09-14 16:06:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:37,126 INFO L225 Difference]: With dead ends: 5784 [2018-09-14 16:06:37,126 INFO L226 Difference]: Without dead ends: 3896 [2018-09-14 16:06:37,135 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:06:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2018-09-14 16:06:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 3789. [2018-09-14 16:06:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3789 states. [2018-09-14 16:06:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 5826 transitions. [2018-09-14 16:06:37,282 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 5826 transitions. Word has length 193 [2018-09-14 16:06:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:37,282 INFO L480 AbstractCegarLoop]: Abstraction has 3789 states and 5826 transitions. [2018-09-14 16:06:37,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:06:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 5826 transitions. [2018-09-14 16:06:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-14 16:06:37,296 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:37,296 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:37,297 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash -30855632, now seen corresponding path program 1 times [2018-09-14 16:06:37,297 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:37,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:37,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:37,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:37,299 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:37,573 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:06:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:37,941 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:06:37,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:06:37,942 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:37,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:06:37,943 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:06:37,943 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:06:37,943 INFO L87 Difference]: Start difference. First operand 3789 states and 5826 transitions. Second operand 6 states. [2018-09-14 16:06:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:40,402 INFO L93 Difference]: Finished difference Result 8133 states and 12830 transitions. [2018-09-14 16:06:40,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:06:40,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 200 [2018-09-14 16:06:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:40,433 INFO L225 Difference]: With dead ends: 8133 [2018-09-14 16:06:40,433 INFO L226 Difference]: Without dead ends: 4350 [2018-09-14 16:06:40,449 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 16:06:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2018-09-14 16:06:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 3835. [2018-09-14 16:06:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3835 states. [2018-09-14 16:06:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 5587 transitions. [2018-09-14 16:06:40,569 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 5587 transitions. Word has length 200 [2018-09-14 16:06:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:40,570 INFO L480 AbstractCegarLoop]: Abstraction has 3835 states and 5587 transitions. [2018-09-14 16:06:40,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:06:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 5587 transitions. [2018-09-14 16:06:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-14 16:06:40,582 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:40,583 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:40,583 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash -835087436, now seen corresponding path program 1 times [2018-09-14 16:06:40,583 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:40,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:40,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:40,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:40,585 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:40,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:40,905 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 16:06:40,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:40,918 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:41,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:41,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:41,276 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:06:41,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:06:41,277 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:41,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:41,279 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:41,279 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:41,279 INFO L87 Difference]: Start difference. First operand 3835 states and 5587 transitions. Second operand 3 states. [2018-09-14 16:06:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:43,528 INFO L93 Difference]: Finished difference Result 11190 states and 16721 transitions. [2018-09-14 16:06:43,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:43,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2018-09-14 16:06:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:43,574 INFO L225 Difference]: With dead ends: 11190 [2018-09-14 16:06:43,574 INFO L226 Difference]: Without dead ends: 7361 [2018-09-14 16:06:43,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 424 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:06:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2018-09-14 16:06:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 7350. [2018-09-14 16:06:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7350 states. [2018-09-14 16:06:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7350 states to 7350 states and 10406 transitions. [2018-09-14 16:06:43,789 INFO L78 Accepts]: Start accepts. Automaton has 7350 states and 10406 transitions. Word has length 213 [2018-09-14 16:06:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:43,789 INFO L480 AbstractCegarLoop]: Abstraction has 7350 states and 10406 transitions. [2018-09-14 16:06:43,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7350 states and 10406 transitions. [2018-09-14 16:06:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-09-14 16:06:43,808 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:43,808 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:43,809 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -288629148, now seen corresponding path program 1 times [2018-09-14 16:06:43,809 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:43,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:43,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:43,810 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:44,177 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:06:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:44,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:44,883 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:06:44,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:44,902 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:45,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:45,259 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:45,774 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:06:45,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-14 16:06:45,774 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:45,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:45,775 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:45,775 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:06:45,776 INFO L87 Difference]: Start difference. First operand 7350 states and 10406 transitions. Second operand 3 states. [2018-09-14 16:06:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:48,193 INFO L93 Difference]: Finished difference Result 21648 states and 31418 transitions. [2018-09-14 16:06:48,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:06:48,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2018-09-14 16:06:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:48,267 INFO L225 Difference]: With dead ends: 21648 [2018-09-14 16:06:48,267 INFO L226 Difference]: Without dead ends: 14304 [2018-09-14 16:06:48,294 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 441 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-09-14 16:06:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14304 states. [2018-09-14 16:06:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14304 to 14255. [2018-09-14 16:06:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14255 states. [2018-09-14 16:06:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14255 states to 14255 states and 20354 transitions. [2018-09-14 16:06:48,696 INFO L78 Accepts]: Start accepts. Automaton has 14255 states and 20354 transitions. Word has length 221 [2018-09-14 16:06:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:48,697 INFO L480 AbstractCegarLoop]: Abstraction has 14255 states and 20354 transitions. [2018-09-14 16:06:48,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:06:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14255 states and 20354 transitions. [2018-09-14 16:06:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-09-14 16:06:48,730 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:48,730 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:48,731 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash 85802649, now seen corresponding path program 1 times [2018-09-14 16:06:48,731 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:48,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:48,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:48,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:48,733 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:06:49,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:49,360 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 16:06:49,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:49,371 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:49,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:50,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:50,354 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:06:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:51,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:06:51,177 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:06:51,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:51,211 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:06:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:51,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:06:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:52,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:06:52,679 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:06:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:06:53,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:06:53,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:06:53,086 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:06:53,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:06:53,087 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:06:53,088 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:06:53,088 INFO L87 Difference]: Start difference. First operand 14255 states and 20354 transitions. Second operand 9 states. [2018-09-14 16:06:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:06:57,701 INFO L93 Difference]: Finished difference Result 49112 states and 75587 transitions. [2018-09-14 16:06:57,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:06:57,701 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 245 [2018-09-14 16:06:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:06:58,067 INFO L225 Difference]: With dead ends: 49112 [2018-09-14 16:06:58,067 INFO L226 Difference]: Without dead ends: 34863 [2018-09-14 16:06:58,114 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 973 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:06:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34863 states. [2018-09-14 16:06:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34863 to 31982. [2018-09-14 16:06:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31982 states. [2018-09-14 16:06:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31982 states to 31982 states and 46826 transitions. [2018-09-14 16:06:59,220 INFO L78 Accepts]: Start accepts. Automaton has 31982 states and 46826 transitions. Word has length 245 [2018-09-14 16:06:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:06:59,220 INFO L480 AbstractCegarLoop]: Abstraction has 31982 states and 46826 transitions. [2018-09-14 16:06:59,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:06:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 31982 states and 46826 transitions. [2018-09-14 16:06:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-14 16:06:59,298 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:06:59,298 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:06:59,298 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:06:59,299 INFO L82 PathProgramCache]: Analyzing trace with hash -585964937, now seen corresponding path program 1 times [2018-09-14 16:06:59,299 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:06:59,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:59,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:06:59,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:06:59,300 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:06:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:06:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:06:59,611 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:06:59,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:06:59,611 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:06:59,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:06:59,612 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:06:59,612 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:06:59,612 INFO L87 Difference]: Start difference. First operand 31982 states and 46826 transitions. Second operand 3 states. [2018-09-14 16:07:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:02,245 INFO L93 Difference]: Finished difference Result 92167 states and 138937 transitions. [2018-09-14 16:07:02,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:07:02,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2018-09-14 16:07:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:02,532 INFO L225 Difference]: With dead ends: 92167 [2018-09-14 16:07:02,532 INFO L226 Difference]: Without dead ends: 60191 [2018-09-14 16:07:02,642 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:07:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60191 states. [2018-09-14 16:07:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60191 to 60139. [2018-09-14 16:07:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60139 states. [2018-09-14 16:07:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60139 states to 60139 states and 89016 transitions. [2018-09-14 16:07:04,838 INFO L78 Accepts]: Start accepts. Automaton has 60139 states and 89016 transitions. Word has length 243 [2018-09-14 16:07:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:04,838 INFO L480 AbstractCegarLoop]: Abstraction has 60139 states and 89016 transitions. [2018-09-14 16:07:04,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:07:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60139 states and 89016 transitions. [2018-09-14 16:07:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-14 16:07:04,948 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:04,949 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:04,949 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash -120240748, now seen corresponding path program 1 times [2018-09-14 16:07:04,949 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:04,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:04,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:04,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:04,951 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:05,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:05,473 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:07:05,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:05,490 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:05,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:06,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:06,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:06,182 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 16:07:06,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:06,204 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:06,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:06,691 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:07:06,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:07:06,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-14 16:07:06,768 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:07:06,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:07:06,770 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:07:06,770 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:07:06,770 INFO L87 Difference]: Start difference. First operand 60139 states and 89016 transitions. Second operand 9 states. [2018-09-14 16:07:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:17,185 INFO L93 Difference]: Finished difference Result 131726 states and 212580 transitions. [2018-09-14 16:07:17,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-14 16:07:17,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 255 [2018-09-14 16:07:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:17,571 INFO L225 Difference]: With dead ends: 131726 [2018-09-14 16:07:17,571 INFO L226 Difference]: Without dead ends: 71603 [2018-09-14 16:07:17,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 1033 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2018-09-14 16:07:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71603 states. [2018-09-14 16:07:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71603 to 67709. [2018-09-14 16:07:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67709 states. [2018-09-14 16:07:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67709 states to 67709 states and 87566 transitions. [2018-09-14 16:07:19,717 INFO L78 Accepts]: Start accepts. Automaton has 67709 states and 87566 transitions. Word has length 255 [2018-09-14 16:07:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:19,717 INFO L480 AbstractCegarLoop]: Abstraction has 67709 states and 87566 transitions. [2018-09-14 16:07:19,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:07:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 67709 states and 87566 transitions. [2018-09-14 16:07:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-09-14 16:07:19,814 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:19,814 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:19,815 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1354882869, now seen corresponding path program 1 times [2018-09-14 16:07:19,815 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:19,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:19,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:19,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:19,816 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:20,154 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:07:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 97 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:20,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:20,510 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 16:07:20,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:20,518 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:20,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-09-14 16:07:20,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 99 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-14 16:07:21,075 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:21,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-14 16:07:21,076 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:21,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:07:21,077 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:07:21,077 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:07:21,077 INFO L87 Difference]: Start difference. First operand 67709 states and 87566 transitions. Second operand 5 states. [2018-09-14 16:07:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:23,862 INFO L93 Difference]: Finished difference Result 175017 states and 232959 transitions. [2018-09-14 16:07:23,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:07:23,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2018-09-14 16:07:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:24,393 INFO L225 Difference]: With dead ends: 175017 [2018-09-14 16:07:24,394 INFO L226 Difference]: Without dead ends: 121476 [2018-09-14 16:07:24,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 542 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:07:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121476 states. [2018-09-14 16:07:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121476 to 118781. [2018-09-14 16:07:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118781 states. [2018-09-14 16:07:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118781 states to 118781 states and 151495 transitions. [2018-09-14 16:07:28,687 INFO L78 Accepts]: Start accepts. Automaton has 118781 states and 151495 transitions. Word has length 275 [2018-09-14 16:07:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:28,688 INFO L480 AbstractCegarLoop]: Abstraction has 118781 states and 151495 transitions. [2018-09-14 16:07:28,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:07:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 118781 states and 151495 transitions. [2018-09-14 16:07:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-14 16:07:28,839 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:28,840 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:28,840 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1166612077, now seen corresponding path program 1 times [2018-09-14 16:07:28,840 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:28,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:28,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:28,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:28,842 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 145 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:29,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:29,199 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 16:07:29,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:29,209 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:29,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-14 16:07:29,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 145 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:07:29,702 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:29,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:07:29,702 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:29,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:07:29,703 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:07:29,703 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:07:29,703 INFO L87 Difference]: Start difference. First operand 118781 states and 151495 transitions. Second operand 5 states. [2018-09-14 16:07:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:33,957 INFO L93 Difference]: Finished difference Result 269701 states and 352913 transitions. [2018-09-14 16:07:33,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:07:33,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2018-09-14 16:07:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:34,432 INFO L225 Difference]: With dead ends: 269701 [2018-09-14 16:07:34,432 INFO L226 Difference]: Without dead ends: 150966 [2018-09-14 16:07:34,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 646 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:07:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150966 states. [2018-09-14 16:07:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150966 to 150181. [2018-09-14 16:07:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150181 states. [2018-09-14 16:07:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150181 states to 150181 states and 183779 transitions. [2018-09-14 16:07:37,704 INFO L78 Accepts]: Start accepts. Automaton has 150181 states and 183779 transitions. Word has length 326 [2018-09-14 16:07:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:37,704 INFO L480 AbstractCegarLoop]: Abstraction has 150181 states and 183779 transitions. [2018-09-14 16:07:37,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:07:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 150181 states and 183779 transitions. [2018-09-14 16:07:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-09-14 16:07:38,586 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:38,587 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:38,587 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:38,587 INFO L82 PathProgramCache]: Analyzing trace with hash 912745094, now seen corresponding path program 1 times [2018-09-14 16:07:38,588 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:38,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:38,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:38,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:38,589 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 212 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:07:39,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:39,110 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 16:07:39,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:39,120 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:39,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-14 16:07:39,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 195 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-14 16:07:39,781 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:39,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 16:07:39,782 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:39,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:07:39,782 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:07:39,783 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:07:39,783 INFO L87 Difference]: Start difference. First operand 150181 states and 183779 transitions. Second operand 5 states. [2018-09-14 16:07:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:42,205 INFO L93 Difference]: Finished difference Result 290965 states and 361727 transitions. [2018-09-14 16:07:42,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 16:07:42,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 373 [2018-09-14 16:07:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:43,477 INFO L225 Difference]: With dead ends: 290965 [2018-09-14 16:07:43,477 INFO L226 Difference]: Without dead ends: 151340 [2018-09-14 16:07:43,605 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:07:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151340 states. [2018-09-14 16:07:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151340 to 150223. [2018-09-14 16:07:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150223 states. [2018-09-14 16:07:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150223 states to 150223 states and 183466 transitions. [2018-09-14 16:07:46,206 INFO L78 Accepts]: Start accepts. Automaton has 150223 states and 183466 transitions. Word has length 373 [2018-09-14 16:07:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:46,207 INFO L480 AbstractCegarLoop]: Abstraction has 150223 states and 183466 transitions. [2018-09-14 16:07:46,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:07:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 150223 states and 183466 transitions. [2018-09-14 16:07:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-14 16:07:46,866 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:46,867 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:46,867 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1309372110, now seen corresponding path program 1 times [2018-09-14 16:07:46,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:46,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:46,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:46,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:46,868 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 241 proven. 14 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-09-14 16:07:47,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:47,154 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 16:07:47,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:47,161 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:47,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-09-14 16:07:47,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-14 16:07:47,705 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:47,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2018-09-14 16:07:47,705 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:47,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:07:47,706 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:07:47,706 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:07:47,706 INFO L87 Difference]: Start difference. First operand 150223 states and 183466 transitions. Second operand 3 states. [2018-09-14 16:07:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:49,901 INFO L93 Difference]: Finished difference Result 289526 states and 351805 transitions. [2018-09-14 16:07:49,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:07:49,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 415 [2018-09-14 16:07:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:07:50,260 INFO L225 Difference]: With dead ends: 289526 [2018-09-14 16:07:50,261 INFO L226 Difference]: Without dead ends: 150211 [2018-09-14 16:07:50,429 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 829 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:07:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150211 states. [2018-09-14 16:07:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150211 to 150211. [2018-09-14 16:07:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150211 states. [2018-09-14 16:07:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150211 states to 150211 states and 183396 transitions. [2018-09-14 16:07:53,688 INFO L78 Accepts]: Start accepts. Automaton has 150211 states and 183396 transitions. Word has length 415 [2018-09-14 16:07:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:07:53,688 INFO L480 AbstractCegarLoop]: Abstraction has 150211 states and 183396 transitions. [2018-09-14 16:07:53,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:07:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 150211 states and 183396 transitions. [2018-09-14 16:07:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-09-14 16:07:53,862 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:07:53,862 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:07:53,862 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:07:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1456401725, now seen corresponding path program 1 times [2018-09-14 16:07:53,863 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:07:53,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:53,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:53,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:07:53,864 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:07:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 257 proven. 30 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-09-14 16:07:54,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:07:54,795 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 16:07:54,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:07:54,804 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:07:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:07:55,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:07:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-09-14 16:07:55,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:07:55,607 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-09-14 16:07:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 232 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-14 16:07:55,834 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:07:55,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2018-09-14 16:07:55,834 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:07:55,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:07:55,835 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:07:55,835 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:07:55,836 INFO L87 Difference]: Start difference. First operand 150211 states and 183396 transitions. Second operand 6 states. [2018-09-14 16:07:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:07:59,937 INFO L93 Difference]: Finished difference Result 314514 states and 386074 transitions. [2018-09-14 16:07:59,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:07:59,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 421 [2018-09-14 16:07:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:04,699 INFO L225 Difference]: With dead ends: 314514 [2018-09-14 16:08:04,700 INFO L226 Difference]: Without dead ends: 167804 [2018-09-14 16:08:04,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 834 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-09-14 16:08:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167804 states. [2018-09-14 16:08:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167804 to 158715. [2018-09-14 16:08:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158715 states. [2018-09-14 16:08:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158715 states to 158715 states and 191835 transitions. [2018-09-14 16:08:08,697 INFO L78 Accepts]: Start accepts. Automaton has 158715 states and 191835 transitions. Word has length 421 [2018-09-14 16:08:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:08:08,698 INFO L480 AbstractCegarLoop]: Abstraction has 158715 states and 191835 transitions. [2018-09-14 16:08:08,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:08:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 158715 states and 191835 transitions. [2018-09-14 16:08:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-09-14 16:08:08,952 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:08:08,952 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:08:08,952 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:08:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2081657621, now seen corresponding path program 1 times [2018-09-14 16:08:08,953 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:08:08,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:08,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:08,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:08:08,954 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:08:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 314 proven. 137 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-09-14 16:08:09,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:09,625 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:08:09,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:09,633 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:09,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-09-14 16:08:10,200 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 314 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-09-14 16:08:10,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:08:10,438 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:08:10,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:08:10,456 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:08:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:08:11,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:08:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-09-14 16:08:11,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:08:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 314 proven. 44 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-09-14 16:08:11,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:08:11,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-09-14 16:08:11,551 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:08:11,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 16:08:11,552 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 16:08:11,552 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-14 16:08:11,553 INFO L87 Difference]: Start difference. First operand 158715 states and 191835 transitions. Second operand 14 states. [2018-09-14 16:08:12,401 WARN L178 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-09-14 16:08:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:08:38,930 INFO L93 Difference]: Finished difference Result 1223078 states and 1576353 transitions. [2018-09-14 16:08:38,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-14 16:08:38,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 444 [2018-09-14 16:08:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:08:44,682 INFO L225 Difference]: With dead ends: 1223078 [2018-09-14 16:08:44,682 INFO L226 Difference]: Without dead ends: 1064377 [2018-09-14 16:08:45,423 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1888 GetRequests, 1814 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1006, Invalid=4250, Unknown=0, NotChecked=0, Total=5256 [2018-09-14 16:08:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064377 states. [2018-09-14 16:09:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064377 to 1055386. [2018-09-14 16:09:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055386 states. [2018-09-14 16:09:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055386 states to 1055386 states and 1306463 transitions. [2018-09-14 16:09:32,008 INFO L78 Accepts]: Start accepts. Automaton has 1055386 states and 1306463 transitions. Word has length 444 [2018-09-14 16:09:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:09:32,008 INFO L480 AbstractCegarLoop]: Abstraction has 1055386 states and 1306463 transitions. [2018-09-14 16:09:32,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 16:09:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1055386 states and 1306463 transitions. [2018-09-14 16:09:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-14 16:09:33,010 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:09:33,011 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:09:33,011 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:09:33,012 INFO L82 PathProgramCache]: Analyzing trace with hash -649207228, now seen corresponding path program 1 times [2018-09-14 16:09:33,012 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:09:33,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:33,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:33,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:09:33,013 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:09:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 201 proven. 178 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-09-14 16:09:33,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:33,641 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 16:09:33,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:33,650 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:33,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 301 proven. 30 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-09-14 16:09:35,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-09-14 16:09:35,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:09:35,395 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 16:09:35,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:09:35,412 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:09:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:09:36,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:09:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 228 proven. 161 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:09:36,203 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:09:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 385 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-14 16:09:36,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:09:36,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 4, 4] total 11 [2018-09-14 16:09:36,656 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:09:36,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:09:36,658 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:09:36,658 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-14 16:09:36,658 INFO L87 Difference]: Start difference. First operand 1055386 states and 1306463 transitions. Second operand 9 states. Received shutdown request... [2018-09-14 16:09:38,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 16:09:38,038 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:09:38,044 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:09:38,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:09:38 BoogieIcfgContainer [2018-09-14 16:09:38,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:09:38,045 INFO L168 Benchmark]: Toolchain (without parser) took 205019.04 ms. Allocated memory was 1.5 GB in the beginning and 6.7 GB in the end (delta: 5.2 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. [2018-09-14 16:09:38,046 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 16:09:38,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1114.11 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 16:09:38,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.30 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 16:09:38,048 INFO L168 Benchmark]: Boogie Preprocessor took 364.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -945.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:09:38,049 INFO L168 Benchmark]: RCFGBuilder took 5469.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 269.4 MB). Peak memory consumption was 269.4 MB. Max. memory is 7.1 GB. [2018-09-14 16:09:38,050 INFO L168 Benchmark]: TraceAbstraction took 197887.85 ms. Allocated memory was 2.3 GB in the beginning and 6.7 GB in the end (delta: 4.4 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -877.5 MB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. [2018-09-14 16:09:38,054 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 1114.11 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 175.30 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 364.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -945.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5469.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 269.4 MB). Peak memory consumption was 269.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 197887.85 ms. Allocated memory was 2.3 GB in the beginning and 6.7 GB in the end (delta: 4.4 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -877.5 MB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1539]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1539). Cancelled while BasicCegarLoop was constructing difference of abstraction (1055386states) and FLOYD_HOARE automaton (currently 12 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (3786 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 197.8s OverallTime, 17 OverallIterations, 7 TraceHistogramMax, 98.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3796 SDtfs, 21430 SDslu, 4905 SDs, 0 SdLazy, 29037 SolverSat, 5506 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10735 GetRequests, 10447 SyntacticMatches, 47 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1055386occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 69.9s AutomataMinimizationTime, 16 MinimizatonAttempts, 30287 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 10040 NumberOfCodeBlocks, 10040 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 15205 ConstructedInterpolants, 0 QuantifiedInterpolants, 11574922 SizeOfPredicates, 31 NumberOfNonLiveVariables, 20783 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 49 InterpolantComputations, 16 PerfectInterpolantSequences, 9648/10755 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label49_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-09-38-068.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label49_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-09-38-068.csv Completed graceful shutdown