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/Problem11_label48_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:15:55,581 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:15:55,583 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:15:55,601 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:15:55,601 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:15:55,602 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:15:55,604 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:15:55,606 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:15:55,609 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:15:55,615 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:15:55,616 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:15:55,616 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:15:55,617 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:15:55,623 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:15:55,624 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:15:55,627 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:15:55,628 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:15:55,631 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:15:55,635 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:15:55,641 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:15:55,642 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:15:55,643 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:15:55,649 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:15:55,649 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:15:55,649 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:15:55,650 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:15:55,651 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:15:55,653 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:15:55,653 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:15:55,656 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:15:55,656 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:15:55,658 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:15:55,658 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:15:55,658 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:15:55,660 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:15:55,661 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:15:55,661 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 17:15:55,691 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:15:55,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:15:55,693 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:15:55,693 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:15:55,693 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:15:55,693 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:15:55,693 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:15:55,694 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:15:55,694 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:15:55,694 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:15:55,694 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:15:55,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:15:55,696 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:15:55,696 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:15:55,696 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:15:55,696 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:15:55,696 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:15:55,698 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:15:55,698 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:15:55,699 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:15:55,699 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:15:55,699 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:15:55,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:15:55,699 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:15:55,700 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:15:55,700 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:15:55,700 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:15:55,700 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:15:55,700 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:15:55,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:15:55,701 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:15:55,701 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:15:55,701 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:15:55,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:15:55,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:15:55,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:15:55,767 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:15:55,768 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:15:55,769 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c [2018-09-14 17:15:56,109 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d8ca20c/14a8be9f685544b98254f09e960b567d/FLAGe48a88a03 [2018-09-14 17:15:56,427 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:15:56,428 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c [2018-09-14 17:15:56,443 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d8ca20c/14a8be9f685544b98254f09e960b567d/FLAGe48a88a03 [2018-09-14 17:15:56,462 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d8ca20c/14a8be9f685544b98254f09e960b567d [2018-09-14 17:15:56,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:15:56,478 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:15:56,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:15:56,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:15:56,486 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:15:56,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:15:56" (1/1) ... [2018-09-14 17:15:56,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb1ce31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:56, skipping insertion in model container [2018-09-14 17:15:56,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:15:56" (1/1) ... [2018-09-14 17:15:56,503 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:15:57,185 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:15:57,205 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:15:57,429 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:15:57,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57 WrapperNode [2018-09-14 17:15:57,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:15:57,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:15:57,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:15:57,508 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:15:57,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:57,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:57,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:15:57,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:15:57,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:15:57,685 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:15:57,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:57,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:57,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:57,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:58,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:58,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:58,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (1/1) ... [2018-09-14 17:15:58,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:15:58,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:15:58,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:15:58,059 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:15:58,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (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 17:15:58,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:15:58,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:15:58,140 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:15:58,140 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:15:58,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:15:58,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:15:58,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:15:58,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:16:02,786 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:16:02,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:16:02 BoogieIcfgContainer [2018-09-14 17:16:02,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:16:02,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:16:02,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:16:02,792 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:16:02,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:15:56" (1/3) ... [2018-09-14 17:16:02,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bccf24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:16:02, skipping insertion in model container [2018-09-14 17:16:02,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:15:57" (2/3) ... [2018-09-14 17:16:02,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bccf24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:16:02, skipping insertion in model container [2018-09-14 17:16:02,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:16:02" (3/3) ... [2018-09-14 17:16:02,797 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label48_true-unreach-call.c [2018-09-14 17:16:02,807 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:16:02,816 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:16:02,873 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:16:02,874 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:16:02,874 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:16:02,874 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:16:02,875 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:16:02,875 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:16:02,875 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:16:02,875 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:16:02,875 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:16:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-14 17:16:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-14 17:16:02,916 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:02,917 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] [2018-09-14 17:16:02,918 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:02,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1192581977, now seen corresponding path program 1 times [2018-09-14 17:16:02,927 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:02,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:02,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:02,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:02,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:03,443 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-09-14 17:16:03,463 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 17:16:03,465 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:16:03,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:16:03,466 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:16:03,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:16:03,493 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:16:03,493 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:16:03,496 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-09-14 17:16:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:16:06,908 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-09-14 17:16:06,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:16:06,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-09-14 17:16:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:16:06,932 INFO L225 Difference]: With dead ends: 979 [2018-09-14 17:16:06,932 INFO L226 Difference]: Without dead ends: 680 [2018-09-14 17:16:06,946 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:16:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-09-14 17:16:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-09-14 17:16:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-14 17:16:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-09-14 17:16:07,060 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 57 [2018-09-14 17:16:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:16:07,061 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-09-14 17:16:07,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:16:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-09-14 17:16:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-14 17:16:07,068 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:07,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:07,069 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1879663307, now seen corresponding path program 1 times [2018-09-14 17:16:07,069 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:07,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:07,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:07,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:07,071 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:07,439 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:16:07,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:16:07,440 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:16:07,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:16:07,442 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:16:07,442 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:16:07,443 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-09-14 17:16:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:16:11,069 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-09-14 17:16:11,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:16:11,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-09-14 17:16:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:16:11,081 INFO L225 Difference]: With dead ends: 1555 [2018-09-14 17:16:11,081 INFO L226 Difference]: Without dead ends: 1077 [2018-09-14 17:16:11,085 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:16:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-09-14 17:16:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-09-14 17:16:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-09-14 17:16:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-09-14 17:16:11,144 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 130 [2018-09-14 17:16:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:16:11,145 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-09-14 17:16:11,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:16:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-09-14 17:16:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-14 17:16:11,150 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:11,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:11,151 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash -399877285, now seen corresponding path program 1 times [2018-09-14 17:16:11,151 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:11,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:11,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:11,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:11,153 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:11,616 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:16:11,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:16:11,616 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:16:11,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:16:11,617 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:16:11,617 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:16:11,618 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 6 states. [2018-09-14 17:16:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:16:17,270 INFO L93 Difference]: Finished difference Result 3493 states and 5404 transitions. [2018-09-14 17:16:17,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:16:17,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2018-09-14 17:16:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:16:17,295 INFO L225 Difference]: With dead ends: 3493 [2018-09-14 17:16:17,296 INFO L226 Difference]: Without dead ends: 2436 [2018-09-14 17:16:17,303 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-14 17:16:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2018-09-14 17:16:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2393. [2018-09-14 17:16:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2393 states. [2018-09-14 17:16:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3322 transitions. [2018-09-14 17:16:17,391 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3322 transitions. Word has length 138 [2018-09-14 17:16:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:16:17,392 INFO L480 AbstractCegarLoop]: Abstraction has 2393 states and 3322 transitions. [2018-09-14 17:16:17,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:16:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3322 transitions. [2018-09-14 17:16:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-14 17:16:17,402 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:17,402 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, 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] [2018-09-14 17:16:17,403 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:17,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1244588704, now seen corresponding path program 1 times [2018-09-14 17:16:17,403 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:17,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:17,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:17,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:17,405 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:18,013 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 17:16:18,352 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-09-14 17:16:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:16:18,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:16:18,435 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:16:18,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:18,445 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:16:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:18,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:16:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 17:16:18,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:16:19,282 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-14 17:16:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:16:19,859 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:16:19,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-14 17:16:19,860 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:16:19,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:16:19,861 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:16:19,861 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:16:19,861 INFO L87 Difference]: Start difference. First operand 2393 states and 3322 transitions. Second operand 5 states. [2018-09-14 17:16:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:16:23,133 INFO L93 Difference]: Finished difference Result 6582 states and 9085 transitions. [2018-09-14 17:16:23,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:16:23,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 212 [2018-09-14 17:16:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:16:23,156 INFO L225 Difference]: With dead ends: 6582 [2018-09-14 17:16:23,156 INFO L226 Difference]: Without dead ends: 4195 [2018-09-14 17:16:23,164 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 421 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:16:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2018-09-14 17:16:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4094. [2018-09-14 17:16:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4094 states. [2018-09-14 17:16:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 5593 transitions. [2018-09-14 17:16:23,269 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 5593 transitions. Word has length 212 [2018-09-14 17:16:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:16:23,269 INFO L480 AbstractCegarLoop]: Abstraction has 4094 states and 5593 transitions. [2018-09-14 17:16:23,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:16:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 5593 transitions. [2018-09-14 17:16:23,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-14 17:16:23,276 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:23,277 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, 2, 2, 2, 2, 2, 2, 2, 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 17:16:23,277 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1358707587, now seen corresponding path program 1 times [2018-09-14 17:16:23,277 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:23,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:23,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:23,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:23,279 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-14 17:16:23,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:16:23,675 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 17:16:23,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:23,683 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:16:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:23,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:16:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:24,135 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:16:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:24,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:16:24,551 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 17:16:24,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:24,567 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:16:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:24,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:16:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:24,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:16:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:25,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:16:25,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 17 [2018-09-14 17:16:25,275 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:16:25,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 17:16:25,277 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 17:16:25,277 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-09-14 17:16:25,277 INFO L87 Difference]: Start difference. First operand 4094 states and 5593 transitions. Second operand 10 states. [2018-09-14 17:16:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:16:41,662 INFO L93 Difference]: Finished difference Result 20735 states and 34480 transitions. [2018-09-14 17:16:41,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-14 17:16:41,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 255 [2018-09-14 17:16:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:16:41,827 INFO L225 Difference]: With dead ends: 20735 [2018-09-14 17:16:41,828 INFO L226 Difference]: Without dead ends: 16647 [2018-09-14 17:16:41,933 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 1047 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=985, Invalid=4715, Unknown=0, NotChecked=0, Total=5700 [2018-09-14 17:16:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16647 states. [2018-09-14 17:16:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16647 to 15287. [2018-09-14 17:16:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15287 states. [2018-09-14 17:16:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 20298 transitions. [2018-09-14 17:16:42,588 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 20298 transitions. Word has length 255 [2018-09-14 17:16:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:16:42,589 INFO L480 AbstractCegarLoop]: Abstraction has 15287 states and 20298 transitions. [2018-09-14 17:16:42,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-14 17:16:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 20298 transitions. [2018-09-14 17:16:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-14 17:16:42,601 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:42,602 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:16:42,602 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2050879004, now seen corresponding path program 1 times [2018-09-14 17:16:42,603 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:42,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:42,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:42,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:42,604 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-14 17:16:42,999 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:16:42,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:16:42,999 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:16:43,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:16:43,000 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:16:43,000 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:16:43,001 INFO L87 Difference]: Start difference. First operand 15287 states and 20298 transitions. Second operand 4 states. [2018-09-14 17:16:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:16:46,059 INFO L93 Difference]: Finished difference Result 39372 states and 54772 transitions. [2018-09-14 17:16:46,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:16:46,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 276 [2018-09-14 17:16:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:16:46,157 INFO L225 Difference]: With dead ends: 39372 [2018-09-14 17:16:46,157 INFO L226 Difference]: Without dead ends: 24598 [2018-09-14 17:16:46,203 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:16:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24598 states. [2018-09-14 17:16:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24598 to 22225. [2018-09-14 17:16:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22225 states. [2018-09-14 17:16:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22225 states to 22225 states and 29008 transitions. [2018-09-14 17:16:46,674 INFO L78 Accepts]: Start accepts. Automaton has 22225 states and 29008 transitions. Word has length 276 [2018-09-14 17:16:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:16:46,675 INFO L480 AbstractCegarLoop]: Abstraction has 22225 states and 29008 transitions. [2018-09-14 17:16:46,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:16:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22225 states and 29008 transitions. [2018-09-14 17:16:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-14 17:16:46,714 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:16:46,714 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:16:46,714 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:16:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1398455572, now seen corresponding path program 1 times [2018-09-14 17:16:46,715 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:16:46,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:46,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:46,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:16:46,716 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:16:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:47,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:16:47,788 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 17:16:47,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:47,983 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:16:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:48,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:16:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:48,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:16:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:48,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:16:48,886 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 17:16:48,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:16:48,904 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:16:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:16:49,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:16:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:49,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:16:49,540 WARN L178 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 17:16:49,890 WARN L178 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 17:16:50,284 WARN L178 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2018-09-14 17:16:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:16:50,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:16:50,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 5, 5] total 19 [2018-09-14 17:16:50,577 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:16:50,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-14 17:16:50,578 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-14 17:16:50,578 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:16:50,579 INFO L87 Difference]: Start difference. First operand 22225 states and 29008 transitions. Second operand 17 states. [2018-09-14 17:17:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:17:02,657 INFO L93 Difference]: Finished difference Result 46365 states and 71871 transitions. [2018-09-14 17:17:02,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-14 17:17:02,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 338 [2018-09-14 17:17:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:17:02,806 INFO L225 Difference]: With dead ends: 46365 [2018-09-14 17:17:02,806 INFO L226 Difference]: Without dead ends: 24653 [2018-09-14 17:17:02,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1421 GetRequests, 1365 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=795, Invalid=2397, Unknown=0, NotChecked=0, Total=3192 [2018-09-14 17:17:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24653 states. [2018-09-14 17:17:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24653 to 23288. [2018-09-14 17:17:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23288 states. [2018-09-14 17:17:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23288 states to 23288 states and 29995 transitions. [2018-09-14 17:17:03,578 INFO L78 Accepts]: Start accepts. Automaton has 23288 states and 29995 transitions. Word has length 338 [2018-09-14 17:17:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:17:03,579 INFO L480 AbstractCegarLoop]: Abstraction has 23288 states and 29995 transitions. [2018-09-14 17:17:03,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-14 17:17:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 23288 states and 29995 transitions. [2018-09-14 17:17:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-14 17:17:03,617 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:17:03,617 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:17:03,618 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:17:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash 916207623, now seen corresponding path program 1 times [2018-09-14 17:17:03,618 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:17:03,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:03,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:03,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:03,620 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:17:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:04,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:04,514 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 17:17:04,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:04,526 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:04,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:05,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:05,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:05,227 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:17:05,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:05,243 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:05,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:05,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:05,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:17:05,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-14 17:17:05,734 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:17:05,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:17:05,735 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:17:05,735 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:17:05,736 INFO L87 Difference]: Start difference. First operand 23288 states and 29995 transitions. Second operand 9 states. [2018-09-14 17:17:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:17:11,949 INFO L93 Difference]: Finished difference Result 57606 states and 98972 transitions. [2018-09-14 17:17:11,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-14 17:17:11,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 354 [2018-09-14 17:17:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:17:12,242 INFO L225 Difference]: With dead ends: 57606 [2018-09-14 17:17:12,243 INFO L226 Difference]: Without dead ends: 34324 [2018-09-14 17:17:12,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1442 GetRequests, 1415 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2018-09-14 17:17:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34324 states. [2018-09-14 17:17:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34324 to 32400. [2018-09-14 17:17:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32400 states. [2018-09-14 17:17:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32400 states to 32400 states and 47410 transitions. [2018-09-14 17:17:13,570 INFO L78 Accepts]: Start accepts. Automaton has 32400 states and 47410 transitions. Word has length 354 [2018-09-14 17:17:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:17:13,570 INFO L480 AbstractCegarLoop]: Abstraction has 32400 states and 47410 transitions. [2018-09-14 17:17:13,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:17:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 32400 states and 47410 transitions. [2018-09-14 17:17:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-09-14 17:17:13,612 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:17:13,612 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:17:13,612 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:17:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1824579026, now seen corresponding path program 1 times [2018-09-14 17:17:13,613 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:17:13,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:13,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:13,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:13,614 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:17:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:14,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:14,267 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 17:17:14,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:14,282 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:14,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:14,592 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:15,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:15,085 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 17:17:15,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:15,106 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:15,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 225 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:17:15,718 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:15,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:17:15,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 8 [2018-09-14 17:17:15,968 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:17:15,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:17:15,969 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:17:15,969 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:17:15,969 INFO L87 Difference]: Start difference. First operand 32400 states and 47410 transitions. Second operand 6 states. [2018-09-14 17:17:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:17:18,729 INFO L93 Difference]: Finished difference Result 68389 states and 111292 transitions. [2018-09-14 17:17:18,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:17:18,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 355 [2018-09-14 17:17:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:17:18,927 INFO L225 Difference]: With dead ends: 68389 [2018-09-14 17:17:18,928 INFO L226 Difference]: Without dead ends: 28715 [2018-09-14 17:17:19,138 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1416 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:17:19,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28715 states. [2018-09-14 17:17:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28715 to 26349. [2018-09-14 17:17:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26349 states. [2018-09-14 17:17:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26349 states to 26349 states and 34747 transitions. [2018-09-14 17:17:19,938 INFO L78 Accepts]: Start accepts. Automaton has 26349 states and 34747 transitions. Word has length 355 [2018-09-14 17:17:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:17:19,939 INFO L480 AbstractCegarLoop]: Abstraction has 26349 states and 34747 transitions. [2018-09-14 17:17:19,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:17:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26349 states and 34747 transitions. [2018-09-14 17:17:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-09-14 17:17:19,959 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:17:19,960 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:17:19,960 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:17:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2031821643, now seen corresponding path program 1 times [2018-09-14 17:17:19,961 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:17:19,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:19,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:19,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:19,962 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:17:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 285 proven. 48 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-09-14 17:17:21,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:21,035 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 17:17:21,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:21,045 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:21,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:21,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:21,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:21,964 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 17:17:21,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:21,980 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:22,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:22,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:17:23,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:17:23,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 5, 5] total 23 [2018-09-14 17:17:23,167 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:17:23,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-14 17:17:23,169 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-14 17:17:23,169 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2018-09-14 17:17:23,169 INFO L87 Difference]: Start difference. First operand 26349 states and 34747 transitions. Second operand 18 states. [2018-09-14 17:17:25,054 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-09-14 17:17:25,307 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-09-14 17:17:25,885 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2018-09-14 17:17:30,366 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2018-09-14 17:17:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:17:35,669 INFO L93 Difference]: Finished difference Result 53826 states and 84456 transitions. [2018-09-14 17:17:35,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-14 17:17:35,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 359 [2018-09-14 17:17:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:17:35,900 INFO L225 Difference]: With dead ends: 53826 [2018-09-14 17:17:35,901 INFO L226 Difference]: Without dead ends: 26186 [2018-09-14 17:17:36,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1526 GetRequests, 1460 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=914, Invalid=2992, Unknown=0, NotChecked=0, Total=3906 [2018-09-14 17:17:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26186 states. [2018-09-14 17:17:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26186 to 23734. [2018-09-14 17:17:37,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23734 states. [2018-09-14 17:17:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23734 states to 23734 states and 31529 transitions. [2018-09-14 17:17:37,708 INFO L78 Accepts]: Start accepts. Automaton has 23734 states and 31529 transitions. Word has length 359 [2018-09-14 17:17:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:17:37,709 INFO L480 AbstractCegarLoop]: Abstraction has 23734 states and 31529 transitions. [2018-09-14 17:17:37,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-14 17:17:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 23734 states and 31529 transitions. [2018-09-14 17:17:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-14 17:17:37,724 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:17:37,724 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:17:37,725 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:17:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1669162080, now seen corresponding path program 1 times [2018-09-14 17:17:37,725 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:17:37,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:37,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:37,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:17:37,726 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:17:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 123 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:17:38,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:38,742 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 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 17:17:38,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:38,751 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:38,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:39,000 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:39,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:17:39,483 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:17:39,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:17:39,502 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:17:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:17:39,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:17:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:39,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:17:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 337 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:17:40,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:17:40,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-09-14 17:17:40,214 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:17:40,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-14 17:17:40,215 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-14 17:17:40,215 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-09-14 17:17:40,216 INFO L87 Difference]: Start difference. First operand 23734 states and 31529 transitions. Second operand 20 states. [2018-09-14 17:17:44,117 WARN L178 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-09-14 17:17:46,266 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2018-09-14 17:17:55,780 WARN L178 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-09-14 17:18:00,323 WARN L178 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-09-14 17:18:05,550 WARN L178 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2018-09-14 17:18:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:18:09,894 INFO L93 Difference]: Finished difference Result 60754 states and 85655 transitions. [2018-09-14 17:18:09,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-14 17:18:09,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 360 [2018-09-14 17:18:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:18:10,046 INFO L225 Difference]: With dead ends: 60754 [2018-09-14 17:18:10,046 INFO L226 Difference]: Without dead ends: 33202 [2018-09-14 17:18:10,161 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1542 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7318 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2180, Invalid=17280, Unknown=0, NotChecked=0, Total=19460 [2018-09-14 17:18:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33202 states. [2018-09-14 17:18:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33202 to 31092. [2018-09-14 17:18:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31092 states. [2018-09-14 17:18:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31092 states to 31092 states and 41332 transitions. [2018-09-14 17:18:11,213 INFO L78 Accepts]: Start accepts. Automaton has 31092 states and 41332 transitions. Word has length 360 [2018-09-14 17:18:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:18:11,213 INFO L480 AbstractCegarLoop]: Abstraction has 31092 states and 41332 transitions. [2018-09-14 17:18:11,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-14 17:18:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31092 states and 41332 transitions. [2018-09-14 17:18:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-09-14 17:18:11,227 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:18:11,227 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-14 17:18:11,228 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:18:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1914137172, now seen corresponding path program 1 times [2018-09-14 17:18:11,228 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:18:11,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:11,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:11,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:11,229 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:18:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:11,817 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-14 17:18:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 306 proven. 48 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-09-14 17:18:12,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:18:12,454 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:18:12,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:12,462 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:18:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:12,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:18:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-14 17:18:12,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:18:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-14 17:18:13,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:18:13,458 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:18:13,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:13,474 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:18:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:13,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:18:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 353 proven. 6 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-14 17:18:13,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:18:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-14 17:18:14,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:18:14,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 19 [2018-09-14 17:18:14,321 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:18:14,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-14 17:18:14,322 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-14 17:18:14,323 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:18:14,323 INFO L87 Difference]: Start difference. First operand 31092 states and 41332 transitions. Second operand 17 states. [2018-09-14 17:18:16,786 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-09-14 17:18:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:18:23,451 INFO L93 Difference]: Finished difference Result 59881 states and 78728 transitions. [2018-09-14 17:18:23,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-14 17:18:23,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 390 [2018-09-14 17:18:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:18:23,527 INFO L225 Difference]: With dead ends: 59881 [2018-09-14 17:18:23,527 INFO L226 Difference]: Without dead ends: 25182 [2018-09-14 17:18:23,645 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1650 GetRequests, 1591 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2018-09-14 17:18:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25182 states. [2018-09-14 17:18:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25182 to 22229. [2018-09-14 17:18:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22229 states. [2018-09-14 17:18:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22229 states to 22229 states and 25420 transitions. [2018-09-14 17:18:24,385 INFO L78 Accepts]: Start accepts. Automaton has 22229 states and 25420 transitions. Word has length 390 [2018-09-14 17:18:24,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:18:24,385 INFO L480 AbstractCegarLoop]: Abstraction has 22229 states and 25420 transitions. [2018-09-14 17:18:24,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-14 17:18:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 22229 states and 25420 transitions. [2018-09-14 17:18:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-09-14 17:18:24,399 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:18:24,400 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 17:18:24,400 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:18:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1143366859, now seen corresponding path program 1 times [2018-09-14 17:18:24,401 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:18:24,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:24,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:24,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:24,402 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:18:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 156 proven. 232 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-14 17:18:24,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:18:24,831 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:18:24,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:24,839 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:18:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:24,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:18:27,727 WARN L178 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2018-09-14 17:18:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 17:18:27,923 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:18:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 261 proven. 107 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-14 17:18:28,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:18:28,273 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:18:28,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:28,290 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:18:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:28,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:18:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-14 17:18:30,777 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:18:30,971 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-14 17:18:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 261 proven. 107 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-14 17:18:31,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:18:31,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5, 8, 5] total 15 [2018-09-14 17:18:31,521 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:18:31,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-14 17:18:31,523 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-14 17:18:31,523 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=150, Unknown=3, NotChecked=0, Total=210 [2018-09-14 17:18:31,523 INFO L87 Difference]: Start difference. First operand 22229 states and 25420 transitions. Second operand 10 states. Received shutdown request... [2018-09-14 17:19:59,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-14 17:19:59,602 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:19:59,607 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:19:59,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:19:59 BoogieIcfgContainer [2018-09-14 17:19:59,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:19:59,608 INFO L168 Benchmark]: Toolchain (without parser) took 243132.55 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -28.3 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-14 17:19:59,609 INFO L168 Benchmark]: CDTParser took 0.24 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 17:19:59,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1028.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:19:59,610 INFO L168 Benchmark]: Boogie Procedure Inliner took 176.96 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:19:59,611 INFO L168 Benchmark]: Boogie Preprocessor took 372.51 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 823.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.1 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2018-09-14 17:19:59,611 INFO L168 Benchmark]: RCFGBuilder took 4729.94 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 170.0 MB). Peak memory consumption was 170.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:19:59,612 INFO L168 Benchmark]: TraceAbstraction took 236818.61 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 656.7 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-09-14 17:19:59,617 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1028.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 176.96 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 372.51 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 823.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.1 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4729.94 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 170.0 MB). Peak memory consumption was 170.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236818.61 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 656.7 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 156]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 156). Cancelled while BasicCegarLoop was constructing difference of abstraction (22229states) and FLOYD_HOARE automaton (currently 23 states, 10 states before enhancement), while ReachableStatesComputation was computing reachable states (50971 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 236.7s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 198.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2396 SDtfs, 36073 SDslu, 5201 SDs, 0 SdLazy, 57139 SolverSat, 12294 SolverUnsat, 51 SolverUnknown, 0 SolverNotchecked, 148.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12481 GetRequests, 11979 SyntacticMatches, 32 SemanticMatches, 470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12180 ImplicationChecksByTransitivity, 38.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32400occurred in iteration=8, 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: 7.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 17257 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 24.3s InterpolantComputationTime, 9539 NumberOfCodeBlocks, 9539 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 15380 ConstructedInterpolants, 3 QuantifiedInterpolants, 25499815 SizeOfPredicates, 27 NumberOfNonLiveVariables, 9899 ConjunctsInSsa, 149 ConjunctsInUnsatCore, 47 InterpolantComputations, 5 PerfectInterpolantSequences, 14224/15754 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/Problem11_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-19-59-629.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label48_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-19-59-629.csv Completed graceful shutdown