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/Problem12_label02_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:18:09,433 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:18:09,435 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:18:09,451 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:18:09,452 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:18:09,453 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:18:09,454 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:18:09,456 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:18:09,459 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:18:09,460 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:18:09,461 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:18:09,462 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:18:09,465 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:18:09,466 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:18:09,467 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:18:09,468 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:18:09,469 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:18:09,471 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:18:09,473 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:18:09,474 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:18:09,475 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:18:09,476 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:18:09,479 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:18:09,479 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:18:09,479 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:18:09,480 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:18:09,481 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:18:09,482 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:18:09,482 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:18:09,484 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:18:09,484 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:18:09,484 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:18:09,485 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:18:09,485 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:18:09,486 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:18:09,486 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:18:09,487 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 17:18:09,503 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:18:09,503 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:18:09,504 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:18:09,504 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:18:09,505 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:18:09,505 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:18:09,505 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:18:09,505 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:18:09,505 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:18:09,506 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:18:09,506 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:18:09,507 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:18:09,507 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:18:09,507 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:18:09,507 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:18:09,507 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:18:09,507 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:18:09,508 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:18:09,508 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:18:09,508 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:18:09,508 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:18:09,508 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:18:09,509 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:18:09,509 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:18:09,509 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:18:09,509 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:18:09,509 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:18:09,510 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:18:09,510 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:18:09,510 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:18:09,511 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:18:09,512 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:18:09,512 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:18:09,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:18:09,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:18:09,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:18:09,571 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:18:09,572 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:18:09,572 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label02_true-unreach-call.c [2018-09-14 17:18:09,904 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b12230ca/b43367a3c2904aa48c5ffcbff9e3c10e/FLAGe633c76ba [2018-09-14 17:18:10,358 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:18:10,359 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label02_true-unreach-call.c [2018-09-14 17:18:10,388 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b12230ca/b43367a3c2904aa48c5ffcbff9e3c10e/FLAGe633c76ba [2018-09-14 17:18:10,406 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b12230ca/b43367a3c2904aa48c5ffcbff9e3c10e [2018-09-14 17:18:10,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:18:10,422 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:18:10,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:18:10,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:18:10,431 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:18:10,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:18:10" (1/1) ... [2018-09-14 17:18:10,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ddc0e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:10, skipping insertion in model container [2018-09-14 17:18:10,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:18:10" (1/1) ... [2018-09-14 17:18:10,448 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:18:11,674 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:18:11,697 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:18:12,741 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:18:12,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12 WrapperNode [2018-09-14 17:18:12,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:18:12,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:18:12,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:18:12,997 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:18:13,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:18:13,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:18:13,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:18:13,223 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:18:13,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:13,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:14,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (1/1) ... [2018-09-14 17:18:14,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:18:14,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:18:14,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:18:14,104 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:18:14,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (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 17:18:14,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:18:14,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:18:14,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-09-14 17:18:14,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-09-14 17:18:14,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-09-14 17:18:14,179 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-09-14 17:18:14,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 17:18:14,179 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 17:18:14,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:18:14,180 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:18:14,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:18:14,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:18:14,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:18:14,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:18:25,275 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:18:25,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:18:25 BoogieIcfgContainer [2018-09-14 17:18:25,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:18:25,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:18:25,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:18:25,281 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:18:25,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:18:10" (1/3) ... [2018-09-14 17:18:25,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60be21b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:18:25, skipping insertion in model container [2018-09-14 17:18:25,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:18:12" (2/3) ... [2018-09-14 17:18:25,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60be21b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:18:25, skipping insertion in model container [2018-09-14 17:18:25,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:18:25" (3/3) ... [2018-09-14 17:18:25,285 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label02_true-unreach-call.c [2018-09-14 17:18:25,295 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:18:25,303 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:18:25,364 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:18:25,365 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:18:25,365 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:18:25,365 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:18:25,365 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:18:25,365 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:18:25,366 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:18:25,366 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:18:25,366 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:18:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-09-14 17:18:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-14 17:18:25,420 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:18:25,422 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:18:25,423 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:18:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash 395578323, now seen corresponding path program 1 times [2018-09-14 17:18:25,429 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:18:25,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:25,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:25,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:25,483 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:18:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:26,094 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 17:18:26,097 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:18:26,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:18:26,097 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:18:26,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:18:26,122 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:18:26,123 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:18:26,127 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-09-14 17:18:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:18:35,383 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-09-14 17:18:35,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:18:35,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-09-14 17:18:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:18:35,418 INFO L225 Difference]: With dead ends: 2446 [2018-09-14 17:18:35,418 INFO L226 Difference]: Without dead ends: 1604 [2018-09-14 17:18:35,430 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:18:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-09-14 17:18:35,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-09-14 17:18:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-09-14 17:18:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2861 transitions. [2018-09-14 17:18:35,593 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2861 transitions. Word has length 69 [2018-09-14 17:18:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:18:35,594 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 2861 transitions. [2018-09-14 17:18:35,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:18:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2861 transitions. [2018-09-14 17:18:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-14 17:18:35,611 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:18:35,611 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:18:35,612 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:18:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1284545392, now seen corresponding path program 1 times [2018-09-14 17:18:35,612 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:18:35,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:35,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:35,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:35,618 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:18:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 17:18:35,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:18:35,935 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 17:18:35,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:35,953 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:18:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:36,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:18:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 17:18:36,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:18:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-14 17:18:37,082 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:18:37,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2018-09-14 17:18:37,083 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:18:37,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:18:37,085 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:18:37,085 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-14 17:18:37,086 INFO L87 Difference]: Start difference. First operand 1604 states and 2861 transitions. Second operand 4 states. [2018-09-14 17:18:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:18:48,077 INFO L93 Difference]: Finished difference Result 4760 states and 8592 transitions. [2018-09-14 17:18:48,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:18:48,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2018-09-14 17:18:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:18:48,106 INFO L225 Difference]: With dead ends: 4760 [2018-09-14 17:18:48,107 INFO L226 Difference]: Without dead ends: 3162 [2018-09-14 17:18:48,115 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-14 17:18:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2018-09-14 17:18:48,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3162. [2018-09-14 17:18:48,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2018-09-14 17:18:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4883 transitions. [2018-09-14 17:18:48,229 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4883 transitions. Word has length 145 [2018-09-14 17:18:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:18:48,229 INFO L480 AbstractCegarLoop]: Abstraction has 3162 states and 4883 transitions. [2018-09-14 17:18:48,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:18:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4883 transitions. [2018-09-14 17:18:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-14 17:18:48,236 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:18:48,236 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 17:18:48,236 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:18:48,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2114821560, now seen corresponding path program 1 times [2018-09-14 17:18:48,237 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:18:48,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:48,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:48,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:48,238 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:18:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:18:48,455 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:18:48,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 17:18:48,456 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:18:48,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:18:48,457 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:18:48,457 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-14 17:18:48,457 INFO L87 Difference]: Start difference. First operand 3162 states and 4883 transitions. Second operand 5 states. [2018-09-14 17:18:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:18:58,954 INFO L93 Difference]: Finished difference Result 9662 states and 15158 transitions. [2018-09-14 17:18:58,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 17:18:58,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2018-09-14 17:18:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:18:58,992 INFO L225 Difference]: With dead ends: 9662 [2018-09-14 17:18:58,993 INFO L226 Difference]: Without dead ends: 6506 [2018-09-14 17:18:59,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:18:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2018-09-14 17:18:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 6428. [2018-09-14 17:18:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6428 states. [2018-09-14 17:18:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6428 states to 6428 states and 9305 transitions. [2018-09-14 17:18:59,203 INFO L78 Accepts]: Start accepts. Automaton has 6428 states and 9305 transitions. Word has length 149 [2018-09-14 17:18:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:18:59,204 INFO L480 AbstractCegarLoop]: Abstraction has 6428 states and 9305 transitions. [2018-09-14 17:18:59,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:18:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6428 states and 9305 transitions. [2018-09-14 17:18:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-14 17:18:59,208 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:18:59,209 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:18:59,209 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:18:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 781237532, now seen corresponding path program 1 times [2018-09-14 17:18:59,209 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:18:59,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:59,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:18:59,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:18:59,211 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:18:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:18:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:18:59,473 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:18:59,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:18:59,474 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:18:59,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:18:59,475 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:18:59,475 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:18:59,475 INFO L87 Difference]: Start difference. First operand 6428 states and 9305 transitions. Second operand 6 states. [2018-09-14 17:19:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:19:07,055 INFO L93 Difference]: Finished difference Result 18765 states and 28521 transitions. [2018-09-14 17:19:07,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:19:07,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2018-09-14 17:19:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:19:07,122 INFO L225 Difference]: With dead ends: 18765 [2018-09-14 17:19:07,123 INFO L226 Difference]: Without dead ends: 12343 [2018-09-14 17:19:07,148 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:19:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2018-09-14 17:19:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 12180. [2018-09-14 17:19:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12180 states. [2018-09-14 17:19:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12180 states to 12180 states and 17690 transitions. [2018-09-14 17:19:07,472 INFO L78 Accepts]: Start accepts. Automaton has 12180 states and 17690 transitions. Word has length 183 [2018-09-14 17:19:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:19:07,473 INFO L480 AbstractCegarLoop]: Abstraction has 12180 states and 17690 transitions. [2018-09-14 17:19:07,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:19:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 12180 states and 17690 transitions. [2018-09-14 17:19:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-14 17:19:07,479 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:19:07,480 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:07,480 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:19:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash -589713935, now seen corresponding path program 1 times [2018-09-14 17:19:07,480 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:19:07,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:07,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:07,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:07,483 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:19:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:19:07,767 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:19:07,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:19:07,768 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:19:07,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:19:07,769 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:19:07,769 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:19:07,769 INFO L87 Difference]: Start difference. First operand 12180 states and 17690 transitions. Second operand 4 states. [2018-09-14 17:19:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:19:19,875 INFO L93 Difference]: Finished difference Result 47096 states and 73511 transitions. [2018-09-14 17:19:19,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:19:19,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2018-09-14 17:19:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:19:20,029 INFO L225 Difference]: With dead ends: 47096 [2018-09-14 17:19:20,029 INFO L226 Difference]: Without dead ends: 34922 [2018-09-14 17:19:20,121 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 17:19:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34922 states. [2018-09-14 17:19:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34922 to 34922. [2018-09-14 17:19:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34922 states. [2018-09-14 17:19:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34922 states to 34922 states and 52398 transitions. [2018-09-14 17:19:21,113 INFO L78 Accepts]: Start accepts. Automaton has 34922 states and 52398 transitions. Word has length 218 [2018-09-14 17:19:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:19:21,113 INFO L480 AbstractCegarLoop]: Abstraction has 34922 states and 52398 transitions. [2018-09-14 17:19:21,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:19:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34922 states and 52398 transitions. [2018-09-14 17:19:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-14 17:19:21,130 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:19:21,130 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:21,131 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:19:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1080177845, now seen corresponding path program 1 times [2018-09-14 17:19:21,131 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:19:21,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:21,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:21,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:21,132 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:19:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:21,486 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:19:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:19:22,202 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:19:22,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:19:22,203 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:19:22,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:19:22,204 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:19:22,204 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:19:22,204 INFO L87 Difference]: Start difference. First operand 34922 states and 52398 transitions. Second operand 6 states. [2018-09-14 17:19:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:19:30,996 INFO L93 Difference]: Finished difference Result 86710 states and 134325 transitions. [2018-09-14 17:19:31,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:19:31,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 268 [2018-09-14 17:19:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:19:31,230 INFO L225 Difference]: With dead ends: 86710 [2018-09-14 17:19:31,230 INFO L226 Difference]: Without dead ends: 51794 [2018-09-14 17:19:31,325 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:19:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51794 states. [2018-09-14 17:19:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51794 to 51656. [2018-09-14 17:19:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51656 states. [2018-09-14 17:19:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51656 states to 51656 states and 73583 transitions. [2018-09-14 17:19:32,856 INFO L78 Accepts]: Start accepts. Automaton has 51656 states and 73583 transitions. Word has length 268 [2018-09-14 17:19:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:19:32,857 INFO L480 AbstractCegarLoop]: Abstraction has 51656 states and 73583 transitions. [2018-09-14 17:19:32,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:19:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 51656 states and 73583 transitions. [2018-09-14 17:19:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-09-14 17:19:32,879 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:19:32,879 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:32,879 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:19:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -211252739, now seen corresponding path program 1 times [2018-09-14 17:19:32,880 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:19:32,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:32,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:32,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:32,888 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:19:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-14 17:19:33,208 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:19:33,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:19:33,208 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:19:33,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:19:33,209 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:19:33,209 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:19:33,210 INFO L87 Difference]: Start difference. First operand 51656 states and 73583 transitions. Second operand 4 states. [2018-09-14 17:19:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:19:41,824 INFO L93 Difference]: Finished difference Result 121923 states and 175768 transitions. [2018-09-14 17:19:41,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:19:41,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2018-09-14 17:19:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:19:42,072 INFO L225 Difference]: With dead ends: 121923 [2018-09-14 17:19:42,072 INFO L226 Difference]: Without dead ends: 70273 [2018-09-14 17:19:42,241 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 17:19:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70273 states. [2018-09-14 17:19:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70273 to 67969. [2018-09-14 17:19:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67969 states. [2018-09-14 17:19:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67969 states to 67969 states and 89242 transitions. [2018-09-14 17:19:43,518 INFO L78 Accepts]: Start accepts. Automaton has 67969 states and 89242 transitions. Word has length 309 [2018-09-14 17:19:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:19:43,519 INFO L480 AbstractCegarLoop]: Abstraction has 67969 states and 89242 transitions. [2018-09-14 17:19:43,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:19:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 67969 states and 89242 transitions. [2018-09-14 17:19:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-09-14 17:19:43,541 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:19:43,542 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:43,542 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:19:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1496183483, now seen corresponding path program 1 times [2018-09-14 17:19:43,543 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:19:43,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:43,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:43,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:43,544 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:19:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:43,843 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:19:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 125 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-14 17:19:43,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:19:43,942 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 17:19:43,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:43,949 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:19:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:44,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:19:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:19:44,330 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:19:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:19:44,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:19:44,697 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 17:19:44,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:44,717 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:19:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:44,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:19:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-14 17:19:45,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:19:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-14 17:19:45,874 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-14 17:19:45,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-09-14 17:19:45,875 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:19:45,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:19:45,876 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:19:45,876 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:19:45,876 INFO L87 Difference]: Start difference. First operand 67969 states and 89242 transitions. Second operand 5 states. [2018-09-14 17:19:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:19:52,966 INFO L93 Difference]: Finished difference Result 153170 states and 202740 transitions. [2018-09-14 17:19:52,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 17:19:52,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2018-09-14 17:19:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:19:53,298 INFO L225 Difference]: With dead ends: 153170 [2018-09-14 17:19:53,299 INFO L226 Difference]: Without dead ends: 85207 [2018-09-14 17:19:53,463 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1260 GetRequests, 1240 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:19:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85207 states. [2018-09-14 17:19:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85207 to 85207. [2018-09-14 17:19:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85207 states. [2018-09-14 17:19:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85207 states to 85207 states and 107056 transitions. [2018-09-14 17:19:55,593 INFO L78 Accepts]: Start accepts. Automaton has 85207 states and 107056 transitions. Word has length 313 [2018-09-14 17:19:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:19:55,594 INFO L480 AbstractCegarLoop]: Abstraction has 85207 states and 107056 transitions. [2018-09-14 17:19:55,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:19:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 85207 states and 107056 transitions. [2018-09-14 17:19:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-09-14 17:19:55,613 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:19:55,613 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:55,613 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:19:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -8384030, now seen corresponding path program 1 times [2018-09-14 17:19:55,614 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:19:55,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:55,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:55,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:19:55,615 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:19:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 124 proven. 97 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:19:56,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:19:56,063 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 17:19:56,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:19:56,071 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:19:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:19:56,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:19:56,833 WARN L178 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-09-14 17:19:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 17:19:56,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:19:57,154 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-09-14 17:19:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 124 proven. 97 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:19:57,930 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:19:57,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 17:19:57,930 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:19:57,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:19:57,931 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:19:57,931 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:19:57,933 INFO L87 Difference]: Start difference. First operand 85207 states and 107056 transitions. Second operand 5 states. [2018-09-14 17:20:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:20:09,515 INFO L93 Difference]: Finished difference Result 182864 states and 231576 transitions. [2018-09-14 17:20:09,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 17:20:09,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2018-09-14 17:20:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:20:09,855 INFO L225 Difference]: With dead ends: 182864 [2018-09-14 17:20:09,855 INFO L226 Difference]: Without dead ends: 97663 [2018-09-14 17:20:10,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 636 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-09-14 17:20:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97663 states. [2018-09-14 17:20:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97663 to 97263. [2018-09-14 17:20:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97263 states. [2018-09-14 17:20:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97263 states to 97263 states and 121926 transitions. [2018-09-14 17:20:12,860 INFO L78 Accepts]: Start accepts. Automaton has 97263 states and 121926 transitions. Word has length 320 [2018-09-14 17:20:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:20:12,860 INFO L480 AbstractCegarLoop]: Abstraction has 97263 states and 121926 transitions. [2018-09-14 17:20:12,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:20:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 97263 states and 121926 transitions. [2018-09-14 17:20:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2018-09-14 17:20:12,898 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:20:12,898 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:20:12,899 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:20:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1214835675, now seen corresponding path program 1 times [2018-09-14 17:20:12,899 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:20:12,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:20:12,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:20:12,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:20:12,902 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:20:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:20:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 265 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:20:13,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:20:13,877 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:20:13,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:20:13,885 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:20:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:20:14,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:20:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 338 proven. 39 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 17:20:14,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:20:14,761 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-09-14 17:20:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 196 proven. 239 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:20:16,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:20:16,294 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:20:16,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:20:16,309 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:20:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:20:16,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:20:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 338 proven. 39 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-14 17:20:17,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:20:17,495 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-09-14 17:20:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 196 proven. 239 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:20:17,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:20:17,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9, 9, 9] total 21 [2018-09-14 17:20:17,999 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:20:18,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-14 17:20:18,000 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-14 17:20:18,000 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2018-09-14 17:20:18,000 INFO L87 Difference]: Start difference. First operand 97263 states and 121926 transitions. Second operand 16 states. [2018-09-14 17:20:19,331 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2018-09-14 17:21:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:21:05,325 INFO L93 Difference]: Finished difference Result 281203 states and 345066 transitions. [2018-09-14 17:21:05,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-14 17:21:05,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 396 [2018-09-14 17:21:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:21:05,725 INFO L225 Difference]: With dead ends: 281203 [2018-09-14 17:21:05,726 INFO L226 Difference]: Without dead ends: 182142 [2018-09-14 17:21:05,884 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1659 GetRequests, 1600 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=684, Invalid=2072, Unknown=0, NotChecked=0, Total=2756 [2018-09-14 17:21:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182142 states. [2018-09-14 17:21:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182142 to 176538. [2018-09-14 17:21:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176538 states. [2018-09-14 17:21:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176538 states to 176538 states and 210417 transitions. [2018-09-14 17:21:09,082 INFO L78 Accepts]: Start accepts. Automaton has 176538 states and 210417 transitions. Word has length 396 [2018-09-14 17:21:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:21:09,082 INFO L480 AbstractCegarLoop]: Abstraction has 176538 states and 210417 transitions. [2018-09-14 17:21:09,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-14 17:21:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 176538 states and 210417 transitions. [2018-09-14 17:21:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-09-14 17:21:09,109 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:21:09,109 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:09,110 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:21:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash 500041727, now seen corresponding path program 1 times [2018-09-14 17:21:09,110 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:21:09,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:21:09,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:21:09,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:21:09,111 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:21:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:21:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-14 17:21:09,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:21:09,770 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:21:09,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:21:09,791 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:21:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:21:09,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:21:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-14 17:21:10,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:21:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-14 17:21:10,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:21:10,285 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:21:10,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:21:10,303 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:21:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:21:10,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:21:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-14 17:21:10,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:21:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (9)] Exception during sending of exit command (exit): Broken pipe [2018-09-14 17:21:11,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:21:11,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-09-14 17:21:11,010 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:21:11,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:21:11,011 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:21:11,012 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:21:11,012 INFO L87 Difference]: Start difference. First operand 176538 states and 210417 transitions. Second operand 7 states. [2018-09-14 17:21:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:21:43,464 INFO L93 Difference]: Finished difference Result 454024 states and 614283 transitions. [2018-09-14 17:21:43,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 17:21:43,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 422 [2018-09-14 17:21:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:21:44,623 INFO L225 Difference]: With dead ends: 454024 [2018-09-14 17:21:44,623 INFO L226 Difference]: Without dead ends: 277508 [2018-09-14 17:21:45,240 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1686 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2018-09-14 17:21:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277508 states. [2018-09-14 17:21:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277508 to 273622. [2018-09-14 17:21:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273622 states. [2018-09-14 17:21:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273622 states to 273622 states and 335923 transitions. [2018-09-14 17:21:51,324 INFO L78 Accepts]: Start accepts. Automaton has 273622 states and 335923 transitions. Word has length 422 [2018-09-14 17:21:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:21:51,325 INFO L480 AbstractCegarLoop]: Abstraction has 273622 states and 335923 transitions. [2018-09-14 17:21:51,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:21:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 273622 states and 335923 transitions. [2018-09-14 17:21:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-09-14 17:21:51,345 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:21:51,345 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:21:51,345 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:21:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2060518190, now seen corresponding path program 1 times [2018-09-14 17:21:51,346 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:21:51,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:21:51,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:21:51,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:21:51,347 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:21:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:21:51,774 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-14 17:21:51,960 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-09-14 17:21:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 328 proven. 65 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-09-14 17:21:53,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:21:53,714 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:21:53,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:21:53,724 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:21:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:21:53,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:21:56,628 WARN L178 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 125 DAG size of output: 41 [2018-09-14 17:21:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 328 proven. 65 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-09-14 17:21:57,004 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:21:57,291 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 Received shutdown request... [2018-09-14 17:21:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 328 proven. 65 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-09-14 17:21:57,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:21:57,679 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:21:57,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:21:57,696 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:21:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:21:57,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:21:58,009 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-14 17:21:58,210 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:21:58,211 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:21:58,216 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:21:58,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:21:58 BoogieIcfgContainer [2018-09-14 17:21:58,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:21:58,217 INFO L168 Benchmark]: Toolchain (without parser) took 227798.30 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -922.8 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-14 17:21:58,219 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:21:58,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2573.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-09-14 17:21:58,220 INFO L168 Benchmark]: Boogie Procedure Inliner took 225.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-09-14 17:21:58,221 INFO L168 Benchmark]: Boogie Preprocessor took 880.22 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 931.7 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:21:58,222 INFO L168 Benchmark]: RCFGBuilder took 11173.43 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 641.1 MB). Peak memory consumption was 641.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:21:58,222 INFO L168 Benchmark]: TraceAbstraction took 212938.92 ms. Allocated memory was 2.5 GB in the beginning and 4.8 GB in the end (delta: 2.3 GB). Free memory was 1.7 GB in the beginning and 2.4 GB in the end (delta: -655.3 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-14 17:21:58,228 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2573.26 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 225.33 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 880.22 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 931.7 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11173.43 ms. Allocated memory is still 2.5 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 641.1 MB). Peak memory consumption was 641.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212938.92 ms. Allocated memory was 2.5 GB in the beginning and 4.8 GB in the end (delta: 2.3 GB). Free memory was 1.7 GB in the beginning and 2.4 GB in the end (delta: -655.3 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 198]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 198). Cancelled while BasicCegarLoop was analyzing trace of length 444 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 212.8s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 170.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2358 SDtfs, 45767 SDslu, 2408 SDs, 0 SdLazy, 69181 SolverSat, 14360 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 135.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5615 GetRequests, 5466 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=273622occurred in iteration=11, 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: 18.7s AutomataMinimizationTime, 11 MinimizatonAttempts, 12573 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 5519 NumberOfCodeBlocks, 5519 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 8219 ConstructedInterpolants, 0 QuantifiedInterpolants, 18004091 SizeOfPredicates, 24 NumberOfNonLiveVariables, 4538 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 27 InterpolantComputations, 9 PerfectInterpolantSequences, 5964/7031 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/Problem12_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-21-58-242.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label02_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-21-58-242.csv Completed graceful shutdown