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_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 16:00:04,850 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 16:00:04,852 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 16:00:04,867 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 16:00:04,867 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 16:00:04,869 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 16:00:04,870 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 16:00:04,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 16:00:04,875 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 16:00:04,876 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 16:00:04,877 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 16:00:04,877 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 16:00:04,878 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 16:00:04,881 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 16:00:04,888 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 16:00:04,889 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 16:00:04,890 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 16:00:04,895 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 16:00:04,902 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 16:00:04,903 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 16:00:04,907 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 16:00:04,910 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 16:00:04,912 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 16:00:04,913 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 16:00:04,913 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 16:00:04,917 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 16:00:04,918 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 16:00:04,919 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 16:00:04,920 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 16:00:04,922 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 16:00:04,923 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 16:00:04,925 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 16:00:04,925 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 16:00:04,925 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 16:00:04,926 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 16:00:04,927 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 16:00:04,927 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 16:00:04,959 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 16:00:04,959 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 16:00:04,960 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 16:00:04,961 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 16:00:04,961 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 16:00:04,961 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 16:00:04,961 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 16:00:04,962 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 16:00:04,962 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 16:00:04,962 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 16:00:04,963 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 16:00:04,963 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 16:00:04,964 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 16:00:04,964 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 16:00:04,964 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 16:00:04,964 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 16:00:04,966 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 16:00:04,967 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 16:00:04,967 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 16:00:04,967 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 16:00:04,967 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 16:00:04,968 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 16:00:04,968 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 16:00:04,968 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:04,968 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 16:00:04,968 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 16:00:04,969 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 16:00:04,969 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 16:00:04,969 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 16:00:04,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 16:00:04,969 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 16:00:04,970 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 16:00:04,970 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 16:00:05,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 16:00:05,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 16:00:05,059 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 16:00:05,060 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 16:00:05,061 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 16:00:05,062 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label05_true-unreach-call.c [2018-09-14 16:00:05,420 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bcb9eaf9/8805b89508f648608a392ccabd93edbd/FLAG44f756aa8 [2018-09-14 16:00:05,793 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 16:00:05,793 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label05_true-unreach-call.c [2018-09-14 16:00:05,815 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bcb9eaf9/8805b89508f648608a392ccabd93edbd/FLAG44f756aa8 [2018-09-14 16:00:05,836 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bcb9eaf9/8805b89508f648608a392ccabd93edbd [2018-09-14 16:00:05,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 16:00:05,853 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 16:00:05,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:05,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 16:00:05,861 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 16:00:05,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:05" (1/1) ... [2018-09-14 16:00:05,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2b179c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:05, skipping insertion in model container [2018-09-14 16:00:05,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 04:00:05" (1/1) ... [2018-09-14 16:00:05,878 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 16:00:06,600 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:06,619 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 16:00:06,823 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 16:00:06,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06 WrapperNode [2018-09-14 16:00:06,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 16:00:06,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:06,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 16:00:06,897 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 16:00:06,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:06,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 16:00:07,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 16:00:07,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 16:00:07,079 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 16:00:07,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... [2018-09-14 16:00:07,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 16:00:07,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 16:00:07,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 16:00:07,452 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 16:00:07,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 16:00:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 16:00:07,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 16:00:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 16:00:07,534 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 16:00:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 16:00:07,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 16:00:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 16:00:07,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 16:00:12,692 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 16:00:12,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:12 BoogieIcfgContainer [2018-09-14 16:00:12,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 16:00:12,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 16:00:12,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 16:00:12,698 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 16:00:12,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 04:00:05" (1/3) ... [2018-09-14 16:00:12,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bfcb41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:12, skipping insertion in model container [2018-09-14 16:00:12,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 04:00:06" (2/3) ... [2018-09-14 16:00:12,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bfcb41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 04:00:12, skipping insertion in model container [2018-09-14 16:00:12,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 04:00:12" (3/3) ... [2018-09-14 16:00:12,703 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label05_true-unreach-call.c [2018-09-14 16:00:12,714 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 16:00:12,723 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 16:00:12,785 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 16:00:12,786 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 16:00:12,786 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 16:00:12,786 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 16:00:12,786 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 16:00:12,786 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 16:00:12,787 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 16:00:12,787 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 16:00:12,787 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 16:00:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-14 16:00:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-14 16:00:12,863 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:12,865 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] [2018-09-14 16:00:12,866 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -49135596, now seen corresponding path program 1 times [2018-09-14 16:00:12,876 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:12,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:12,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:12,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:12,936 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:13,923 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:13,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:13,924 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:13,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:13,949 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:13,950 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:13,953 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-14 16:00:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:16,109 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-09-14 16:00:16,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:16,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2018-09-14 16:00:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:16,134 INFO L225 Difference]: With dead ends: 838 [2018-09-14 16:00:16,134 INFO L226 Difference]: Without dead ends: 524 [2018-09-14 16:00:16,145 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-09-14 16:00:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-09-14 16:00:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-09-14 16:00:16,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-09-14 16:00:16,239 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 165 [2018-09-14 16:00:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:16,240 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-09-14 16:00:16,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-09-14 16:00:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-14 16:00:16,248 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:16,248 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:16,248 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1507813107, now seen corresponding path program 1 times [2018-09-14 16:00:16,249 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:16,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:16,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:16,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:16,251 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:16,553 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:16,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:16,553 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:16,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:16,556 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:16,556 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:16,556 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-09-14 16:00:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:20,178 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-09-14 16:00:20,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:00:20,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2018-09-14 16:00:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:20,194 INFO L225 Difference]: With dead ends: 1581 [2018-09-14 16:00:20,194 INFO L226 Difference]: Without dead ends: 1065 [2018-09-14 16:00:20,199 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-09-14 16:00:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-09-14 16:00:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-09-14 16:00:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-09-14 16:00:20,265 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 175 [2018-09-14 16:00:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:20,265 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-09-14 16:00:20,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:00:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-09-14 16:00:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-14 16:00:20,271 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:20,272 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] [2018-09-14 16:00:20,272 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:20,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2079958768, now seen corresponding path program 1 times [2018-09-14 16:00:20,273 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:20,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:20,274 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:20,542 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:20,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 16:00:20,543 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:20,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:20,544 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:20,544 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 16:00:20,544 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-09-14 16:00:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:23,316 INFO L93 Difference]: Finished difference Result 2887 states and 5063 transitions. [2018-09-14 16:00:23,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:23,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2018-09-14 16:00:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:23,330 INFO L225 Difference]: With dead ends: 2887 [2018-09-14 16:00:23,330 INFO L226 Difference]: Without dead ends: 1870 [2018-09-14 16:00:23,335 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 16:00:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2018-09-14 16:00:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1865. [2018-09-14 16:00:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2018-09-14 16:00:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 3055 transitions. [2018-09-14 16:00:23,396 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 3055 transitions. Word has length 178 [2018-09-14 16:00:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:23,397 INFO L480 AbstractCegarLoop]: Abstraction has 1865 states and 3055 transitions. [2018-09-14 16:00:23,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 3055 transitions. [2018-09-14 16:00:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-14 16:00:23,405 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:23,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:23,405 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:23,406 INFO L82 PathProgramCache]: Analyzing trace with hash -267064481, now seen corresponding path program 1 times [2018-09-14 16:00:23,406 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:23,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:23,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:23,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:23,407 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:23,824 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:00:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:24,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:24,056 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:24,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:24,067 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:24,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:00:24,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 16:00:25,677 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:00:25,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2018-09-14 16:00:25,678 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:25,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 16:00:25,679 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 16:00:25,679 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:00:25,680 INFO L87 Difference]: Start difference. First operand 1865 states and 3055 transitions. Second operand 4 states. [2018-09-14 16:00:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:28,397 INFO L93 Difference]: Finished difference Result 5505 states and 9286 transitions. [2018-09-14 16:00:28,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 16:00:28,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 198 [2018-09-14 16:00:28,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:28,426 INFO L225 Difference]: With dead ends: 5505 [2018-09-14 16:00:28,426 INFO L226 Difference]: Without dead ends: 3646 [2018-09-14 16:00:28,435 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 391 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-14 16:00:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2018-09-14 16:00:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3645. [2018-09-14 16:00:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3645 states. [2018-09-14 16:00:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 5796 transitions. [2018-09-14 16:00:28,560 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 5796 transitions. Word has length 198 [2018-09-14 16:00:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:28,561 INFO L480 AbstractCegarLoop]: Abstraction has 3645 states and 5796 transitions. [2018-09-14 16:00:28,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 16:00:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 5796 transitions. [2018-09-14 16:00:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-14 16:00:28,574 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:28,575 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:28,575 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:28,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1960926337, now seen corresponding path program 1 times [2018-09-14 16:00:28,575 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:28,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:28,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:28,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:28,577 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:28,872 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 16:00:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:29,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:29,034 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:29,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:29,049 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:29,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:29,332 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:29,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:29,470 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:00:29,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:29,487 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:29,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:30,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:30,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:00:30,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 16:00:30,433 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:00:30,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:00:30,435 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:00:30,435 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 16:00:30,436 INFO L87 Difference]: Start difference. First operand 3645 states and 5796 transitions. Second operand 9 states. [2018-09-14 16:00:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:35,065 INFO L93 Difference]: Finished difference Result 9221 states and 15837 transitions. [2018-09-14 16:00:35,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:00:35,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 216 [2018-09-14 16:00:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:35,101 INFO L225 Difference]: With dead ends: 9221 [2018-09-14 16:00:35,101 INFO L226 Difference]: Without dead ends: 5582 [2018-09-14 16:00:35,118 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 857 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:00:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2018-09-14 16:00:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 5449. [2018-09-14 16:00:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5449 states. [2018-09-14 16:00:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 7599 transitions. [2018-09-14 16:00:35,290 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 7599 transitions. Word has length 216 [2018-09-14 16:00:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:35,290 INFO L480 AbstractCegarLoop]: Abstraction has 5449 states and 7599 transitions. [2018-09-14 16:00:35,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:00:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 7599 transitions. [2018-09-14 16:00:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-14 16:00:35,308 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:35,308 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:35,308 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1003929591, now seen corresponding path program 1 times [2018-09-14 16:00:35,309 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:35,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:35,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:35,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:35,310 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-14 16:00:35,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:35,814 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 16:00:35,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:35,835 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:36,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:36,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:36,443 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:00:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:36,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:36,696 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 16:00:36,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:36,714 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:37,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:37,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:37,816 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 16:00:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (6)] Exception during sending of exit command (exit): Broken pipe [2018-09-14 16:00:37,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:00:37,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-14 16:00:37,981 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:00:37,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:00:37,982 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:00:37,983 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:00:37,983 INFO L87 Difference]: Start difference. First operand 5449 states and 7599 transitions. Second operand 9 states. [2018-09-14 16:00:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:42,672 INFO L93 Difference]: Finished difference Result 21781 states and 32532 transitions. [2018-09-14 16:00:42,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 16:00:42,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 236 [2018-09-14 16:00:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:42,781 INFO L225 Difference]: With dead ends: 21781 [2018-09-14 16:00:42,781 INFO L226 Difference]: Without dead ends: 16338 [2018-09-14 16:00:42,807 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 937 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-14 16:00:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16338 states. [2018-09-14 16:00:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16338 to 16214. [2018-09-14 16:00:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16214 states. [2018-09-14 16:00:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16214 states to 16214 states and 22915 transitions. [2018-09-14 16:00:43,290 INFO L78 Accepts]: Start accepts. Automaton has 16214 states and 22915 transitions. Word has length 236 [2018-09-14 16:00:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:43,291 INFO L480 AbstractCegarLoop]: Abstraction has 16214 states and 22915 transitions. [2018-09-14 16:00:43,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:00:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 16214 states and 22915 transitions. [2018-09-14 16:00:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-14 16:00:43,335 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:43,336 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:43,336 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:43,336 INFO L82 PathProgramCache]: Analyzing trace with hash 532440606, now seen corresponding path program 1 times [2018-09-14 16:00:43,336 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:43,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:43,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:43,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:43,340 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:43,951 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:00:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:44,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:44,172 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 16:00:44,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:44,179 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:44,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:44,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:00:44,609 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 16:00:44,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 16:00:44,609 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:44,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 16:00:44,610 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 16:00:44,610 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:44,611 INFO L87 Difference]: Start difference. First operand 16214 states and 22915 transitions. Second operand 3 states. [2018-09-14 16:00:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:47,580 INFO L93 Difference]: Finished difference Result 47946 states and 69046 transitions. [2018-09-14 16:00:47,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 16:00:47,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-09-14 16:00:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:47,742 INFO L225 Difference]: With dead ends: 47946 [2018-09-14 16:00:47,742 INFO L226 Difference]: Without dead ends: 31738 [2018-09-14 16:00:47,840 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 16:00:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31738 states. [2018-09-14 16:00:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31738 to 31733. [2018-09-14 16:00:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31733 states. [2018-09-14 16:00:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31733 states to 31733 states and 43784 transitions. [2018-09-14 16:00:48,866 INFO L78 Accepts]: Start accepts. Automaton has 31733 states and 43784 transitions. Word has length 237 [2018-09-14 16:00:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:48,867 INFO L480 AbstractCegarLoop]: Abstraction has 31733 states and 43784 transitions. [2018-09-14 16:00:48,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 16:00:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 31733 states and 43784 transitions. [2018-09-14 16:00:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-14 16:00:48,959 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:48,960 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:00:48,960 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1694838421, now seen corresponding path program 1 times [2018-09-14 16:00:48,961 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:48,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:48,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:48,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:48,962 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:49,874 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-14 16:00:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 126 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:50,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:00:50,064 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:00:50,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:50,072 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:00:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:50,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:00:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-14 16:00:50,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:00:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 96 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-09-14 16:00:50,491 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:00:50,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 14 [2018-09-14 16:00:50,492 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:50,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:00:50,492 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:00:50,492 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-14 16:00:50,493 INFO L87 Difference]: Start difference. First operand 31733 states and 43784 transitions. Second operand 5 states. [2018-09-14 16:00:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:53,585 INFO L93 Difference]: Finished difference Result 95282 states and 139015 transitions. [2018-09-14 16:00:53,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:00:53,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2018-09-14 16:00:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:53,855 INFO L225 Difference]: With dead ends: 95282 [2018-09-14 16:00:53,855 INFO L226 Difference]: Without dead ends: 63555 [2018-09-14 16:00:53,934 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-09-14 16:00:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63555 states. [2018-09-14 16:00:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63555 to 62404. [2018-09-14 16:00:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62404 states. [2018-09-14 16:00:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62404 states to 62404 states and 84359 transitions. [2018-09-14 16:00:55,423 INFO L78 Accepts]: Start accepts. Automaton has 62404 states and 84359 transitions. Word has length 270 [2018-09-14 16:00:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:00:55,423 INFO L480 AbstractCegarLoop]: Abstraction has 62404 states and 84359 transitions. [2018-09-14 16:00:55,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:00:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 62404 states and 84359 transitions. [2018-09-14 16:00:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-09-14 16:00:55,546 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:00:55,546 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:00:55,546 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:00:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash 104512490, now seen corresponding path program 1 times [2018-09-14 16:00:55,547 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:00:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:55,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:00:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:00:55,548 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:00:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:00:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:00:56,086 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 16:00:56,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 16:00:56,086 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:00:56,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 16:00:56,087 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 16:00:56,087 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 16:00:56,087 INFO L87 Difference]: Start difference. First operand 62404 states and 84359 transitions. Second operand 6 states. [2018-09-14 16:00:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:00:59,212 INFO L93 Difference]: Finished difference Result 127748 states and 173417 transitions. [2018-09-14 16:00:59,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:00:59,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 296 [2018-09-14 16:00:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:00:59,499 INFO L225 Difference]: With dead ends: 127748 [2018-09-14 16:00:59,500 INFO L226 Difference]: Without dead ends: 65350 [2018-09-14 16:00:59,612 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-14 16:00:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65350 states. [2018-09-14 16:01:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65350 to 64614. [2018-09-14 16:01:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64614 states. [2018-09-14 16:01:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64614 states to 64614 states and 85549 transitions. [2018-09-14 16:01:00,828 INFO L78 Accepts]: Start accepts. Automaton has 64614 states and 85549 transitions. Word has length 296 [2018-09-14 16:01:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:00,828 INFO L480 AbstractCegarLoop]: Abstraction has 64614 states and 85549 transitions. [2018-09-14 16:01:00,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 16:01:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 64614 states and 85549 transitions. [2018-09-14 16:01:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-14 16:01:00,932 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:00,932 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:01:00,932 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1369725945, now seen corresponding path program 1 times [2018-09-14 16:01:00,933 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:00,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:00,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:00,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:00,934 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:01,615 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:01:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:01,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:01,985 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 16:01:02,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:02,004 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:02,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:02,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:03,414 WARN L178 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-14 16:01:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:04,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:04,261 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:04,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:04,279 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:04,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:05,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:05,394 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:01:05,808 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-14 16:01:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 146 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:01:06,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:06,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 21 [2018-09-14 16:01:06,329 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:06,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:01:06,331 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:01:06,332 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2018-09-14 16:01:06,332 INFO L87 Difference]: Start difference. First operand 64614 states and 85549 transitions. Second operand 9 states. [2018-09-14 16:01:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:01:29,460 INFO L93 Difference]: Finished difference Result 295879 states and 545769 transitions. [2018-09-14 16:01:29,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-14 16:01:29,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 318 [2018-09-14 16:01:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:01:33,182 INFO L225 Difference]: With dead ends: 295879 [2018-09-14 16:01:33,183 INFO L226 Difference]: Without dead ends: 231271 [2018-09-14 16:01:33,690 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1306 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=790, Invalid=4322, Unknown=0, NotChecked=0, Total=5112 [2018-09-14 16:01:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231271 states. [2018-09-14 16:01:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231271 to 208026. [2018-09-14 16:01:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208026 states. [2018-09-14 16:01:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208026 states to 208026 states and 264631 transitions. [2018-09-14 16:01:41,152 INFO L78 Accepts]: Start accepts. Automaton has 208026 states and 264631 transitions. Word has length 318 [2018-09-14 16:01:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:01:41,152 INFO L480 AbstractCegarLoop]: Abstraction has 208026 states and 264631 transitions. [2018-09-14 16:01:41,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:01:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 208026 states and 264631 transitions. [2018-09-14 16:01:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-09-14 16:01:41,369 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:01:41,370 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:01:41,370 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:01:41,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1197304531, now seen corresponding path program 1 times [2018-09-14 16:01:41,371 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:01:41,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:41,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:41,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:01:41,372 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:01:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 176 proven. 58 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-14 16:01:41,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:41,963 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 16:01:41,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:41,972 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:42,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:01:42,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:01:42,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:01:42,512 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:01:42,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:01:42,528 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:01:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:01:43,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:01:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 155 proven. 42 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:01:43,936 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:01:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-14 16:01:44,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:01:44,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 13 [2018-09-14 16:01:44,142 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:01:44,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 16:01:44,143 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 16:01:44,143 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-09-14 16:01:44,143 INFO L87 Difference]: Start difference. First operand 208026 states and 264631 transitions. Second operand 9 states. [2018-09-14 16:02:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:02,596 INFO L93 Difference]: Finished difference Result 435647 states and 583515 transitions. [2018-09-14 16:02:02,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-14 16:02:02,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 325 [2018-09-14 16:02:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:03,506 INFO L225 Difference]: With dead ends: 435647 [2018-09-14 16:02:03,506 INFO L226 Difference]: Without dead ends: 219045 [2018-09-14 16:02:04,008 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1326 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2018-09-14 16:02:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219045 states. [2018-09-14 16:02:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219045 to 208459. [2018-09-14 16:02:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208459 states. [2018-09-14 16:02:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208459 states to 208459 states and 237975 transitions. [2018-09-14 16:02:10,287 INFO L78 Accepts]: Start accepts. Automaton has 208459 states and 237975 transitions. Word has length 325 [2018-09-14 16:02:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:10,287 INFO L480 AbstractCegarLoop]: Abstraction has 208459 states and 237975 transitions. [2018-09-14 16:02:10,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 16:02:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 208459 states and 237975 transitions. [2018-09-14 16:02:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-09-14 16:02:10,411 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:10,412 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 16:02:10,412 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:10,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1561069377, now seen corresponding path program 1 times [2018-09-14 16:02:10,412 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:10,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:10,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:10,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:10,413 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:10,846 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-14 16:02:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 157 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:11,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:11,217 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 16:02:11,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:11,226 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:11,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-14 16:02:11,698 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 156 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:12,018 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 16:02:12,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-14 16:02:12,019 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:12,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 16:02:12,020 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 16:02:12,020 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-09-14 16:02:12,020 INFO L87 Difference]: Start difference. First operand 208459 states and 237975 transitions. Second operand 5 states. [2018-09-14 16:02:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:17,537 INFO L93 Difference]: Finished difference Result 439886 states and 493609 transitions. [2018-09-14 16:02:17,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 16:02:17,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2018-09-14 16:02:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:18,308 INFO L225 Difference]: With dead ends: 439886 [2018-09-14 16:02:18,308 INFO L226 Difference]: Without dead ends: 303214 [2018-09-14 16:02:18,514 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 652 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-09-14 16:02:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303214 states. [2018-09-14 16:02:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303214 to 300732. [2018-09-14 16:02:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300732 states. [2018-09-14 16:02:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300732 states to 300732 states and 337403 transitions. [2018-09-14 16:02:25,193 INFO L78 Accepts]: Start accepts. Automaton has 300732 states and 337403 transitions. Word has length 329 [2018-09-14 16:02:25,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:25,193 INFO L480 AbstractCegarLoop]: Abstraction has 300732 states and 337403 transitions. [2018-09-14 16:02:25,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 16:02:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 300732 states and 337403 transitions. [2018-09-14 16:02:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-09-14 16:02:25,421 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:25,421 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:25,421 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:25,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1257643208, now seen corresponding path program 1 times [2018-09-14 16:02:25,422 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:25,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:25,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:25,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:25,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 189 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:26,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:26,001 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:26,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:26,013 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:26,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 251 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:26,480 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:26,731 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-14 16:02:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 189 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 16:02:27,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:27,226 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:27,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:27,242 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:28,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-14 16:02:29,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:29,570 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2018-09-14 16:02:29,771 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2018-09-14 16:02:29,917 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2018-09-14 16:02:30,406 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2018-09-14 16:02:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 188 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:30,916 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 16:02:30,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 8, 8, 8] total 32 [2018-09-14 16:02:30,917 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 16:02:30,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:02:30,917 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:02:30,918 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2018-09-14 16:02:30,918 INFO L87 Difference]: Start difference. First operand 300732 states and 337403 transitions. Second operand 7 states. [2018-09-14 16:02:31,618 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2018-09-14 16:02:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:02:38,272 INFO L93 Difference]: Finished difference Result 581285 states and 651393 transitions. [2018-09-14 16:02:38,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 16:02:38,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 361 [2018-09-14 16:02:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:02:39,166 INFO L225 Difference]: With dead ends: 581285 [2018-09-14 16:02:39,166 INFO L226 Difference]: Without dead ends: 300587 [2018-09-14 16:02:39,585 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1457 GetRequests, 1423 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2018-09-14 16:02:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300587 states. [2018-09-14 16:02:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300587 to 300587. [2018-09-14 16:02:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300587 states. [2018-09-14 16:02:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300587 states to 300587 states and 337177 transitions. [2018-09-14 16:02:52,807 INFO L78 Accepts]: Start accepts. Automaton has 300587 states and 337177 transitions. Word has length 361 [2018-09-14 16:02:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:02:52,808 INFO L480 AbstractCegarLoop]: Abstraction has 300587 states and 337177 transitions. [2018-09-14 16:02:52,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 16:02:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 300587 states and 337177 transitions. [2018-09-14 16:02:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-09-14 16:02:52,991 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:02:52,991 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:02:52,991 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:02:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1550739307, now seen corresponding path program 1 times [2018-09-14 16:02:52,991 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:02:52,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:52,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:52,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:02:52,993 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:02:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:53,624 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 16:02:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 212 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-14 16:02:53,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:53,742 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:02:53,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:53,750 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:54,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 273 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:02:54,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:54,875 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-14 16:02:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-14 16:02:56,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:02:56,049 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:02:56,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:02:56,064 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:02:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:02:56,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:02:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 148 proven. 11 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-14 16:02:56,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:02:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 203 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:02:57,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:02:57,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 27 [2018-09-14 16:02:57,417 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:02:57,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 16:02:57,418 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 16:02:57,419 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2018-09-14 16:02:57,419 INFO L87 Difference]: Start difference. First operand 300587 states and 337177 transitions. Second operand 12 states. [2018-09-14 16:03:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 16:03:13,156 INFO L93 Difference]: Finished difference Result 637244 states and 735117 transitions. [2018-09-14 16:03:13,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-14 16:03:13,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 373 [2018-09-14 16:03:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 16:03:14,213 INFO L225 Difference]: With dead ends: 637244 [2018-09-14 16:03:14,213 INFO L226 Difference]: Without dead ends: 340566 [2018-09-14 16:03:14,650 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1512 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=883, Invalid=4229, Unknown=0, NotChecked=0, Total=5112 [2018-09-14 16:03:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340566 states. [2018-09-14 16:03:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340566 to 329131. [2018-09-14 16:03:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329131 states. [2018-09-14 16:03:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329131 states to 329131 states and 365436 transitions. [2018-09-14 16:03:21,284 INFO L78 Accepts]: Start accepts. Automaton has 329131 states and 365436 transitions. Word has length 373 [2018-09-14 16:03:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 16:03:21,284 INFO L480 AbstractCegarLoop]: Abstraction has 329131 states and 365436 transitions. [2018-09-14 16:03:21,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 16:03:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 329131 states and 365436 transitions. [2018-09-14 16:03:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-09-14 16:03:21,504 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 16:03:21,505 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 16:03:21,505 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 16:03:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1067279761, now seen corresponding path program 1 times [2018-09-14 16:03:21,506 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 16:03:21,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:21,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:21,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 16:03:21,507 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 16:03:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:22,101 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 16:03:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 254 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-14 16:03:22,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:22,283 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 16:03:23,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:23,407 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:23,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 217 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-14 16:03:23,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 254 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-14 16:03:24,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 16:03:24,230 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 16:03:24,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 16:03:24,249 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 16:03:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 16:03:24,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 16:03:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 217 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-09-14 16:03:25,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 16:03:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 225 proven. 116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 16:03:25,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 16:03:25,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 8, 8] total 19 [2018-09-14 16:03:25,393 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 16:03:25,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 16:03:25,395 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 16:03:25,396 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-09-14 16:03:25,396 INFO L87 Difference]: Start difference. First operand 329131 states and 365436 transitions. Second operand 7 states. Received shutdown request... [2018-09-14 16:03:36,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 16:03:36,014 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 16:03:36,020 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 16:03:36,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 04:03:36 BoogieIcfgContainer [2018-09-14 16:03:36,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 16:03:36,022 INFO L168 Benchmark]: Toolchain (without parser) took 210171.37 ms. Allocated memory was 1.5 GB in the beginning and 5.7 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -771.9 MB). Peak memory consumption was 4.4 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:36,023 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 16:03:36,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1041.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:36,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 181.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:36,025 INFO L168 Benchmark]: Boogie Preprocessor took 372.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 801.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -934.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:36,026 INFO L168 Benchmark]: RCFGBuilder took 5242.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 269.2 MB). Peak memory consumption was 269.2 MB. Max. memory is 7.1 GB. [2018-09-14 16:03:36,026 INFO L168 Benchmark]: TraceAbstraction took 203326.56 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.3 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -212.6 MB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. [2018-09-14 16:03:36,030 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1041.95 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 181.61 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 372.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 801.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -934.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5242.25 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 269.2 MB). Peak memory consumption was 269.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203326.56 ms. Allocated memory was 2.3 GB in the beginning and 5.7 GB in the end (delta: 3.3 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -212.6 MB). Peak memory consumption was 4.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1509]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1509). Cancelled while BasicCegarLoop was constructing difference of abstraction (329131states) and FLOYD_HOARE automaton (currently 11 states, 7 states before enhancement), while ReachableStatesComputation was computing reachable states (668004 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 203.2s OverallTime, 15 OverallIterations, 4 TraceHistogramMax, 121.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3055 SDtfs, 22826 SDslu, 4029 SDs, 0 SdLazy, 39660 SolverSat, 7384 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11335 GetRequests, 10974 SyntacticMatches, 26 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3695 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=329131occurred in iteration=14, 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: 44.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 49947 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 7.1s SatisfiabilityAnalysisTime, 23.9s InterpolantComputationTime, 9542 NumberOfCodeBlocks, 9542 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 14965 ConstructedInterpolants, 0 QuantifiedInterpolants, 22939916 SizeOfPredicates, 135 NumberOfNonLiveVariables, 21438 ConjunctsInSsa, 354 ConjunctsInUnsatCore, 51 InterpolantComputations, 10 PerfectInterpolantSequences, 7862/8867 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_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_16-03-36-046.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_16-03-36-046.csv Completed graceful shutdown