java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:19:49,352 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:19:49,355 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:19:49,369 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:19:49,369 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:19:49,370 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:19:49,372 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:19:49,374 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:19:49,376 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:19:49,378 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:19:49,381 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:19:49,381 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:19:49,382 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:19:49,383 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:19:49,384 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:19:49,387 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:19:49,388 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:19:49,391 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:19:49,394 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:19:49,402 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:19:49,403 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:19:49,407 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:19:49,412 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:19:49,412 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:19:49,412 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:19:49,415 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:19:49,416 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:19:49,416 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:19:49,417 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:19:49,421 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:19:49,421 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:19:49,422 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 11:19:49,422 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 11:19:49,422 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 11:19:49,423 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 11:19:49,424 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 11:19:49,424 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 [2018-09-18 11:19:49,439 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:19:49,439 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:19:49,440 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:19:49,440 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:19:49,441 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:19:49,441 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:19:49,441 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:19:49,441 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:19:49,441 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:19:49,442 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:19:49,442 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:19:49,442 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:19:49,443 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:19:49,443 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:19:49,443 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:19:49,443 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:19:49,443 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:19:49,444 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:19:49,444 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:19:49,444 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:19:49,444 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:19:49,444 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:19:49,445 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:19:49,445 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:19:49,445 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:19:49,445 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:19:49,445 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:19:49,446 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:19:49,446 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:19:49,446 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:19:49,446 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:19:49,446 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:19:49,446 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:19:49,447 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:19:49,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:19:49,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:19:49,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:19:49,538 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:19:49,538 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:19:49,539 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c [2018-09-18 11:19:49,882 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03f706e1/d74ea79efa254f1f9d64f03bbae86cd1/FLAGcf24a692f [2018-09-18 11:19:50,241 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:19:50,242 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c [2018-09-18 11:19:50,274 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03f706e1/d74ea79efa254f1f9d64f03bbae86cd1/FLAGcf24a692f [2018-09-18 11:19:50,296 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b03f706e1/d74ea79efa254f1f9d64f03bbae86cd1 [2018-09-18 11:19:50,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:19:50,314 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:19:50,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:19:50,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:19:50,324 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:19:50,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:19:50" (1/1) ... [2018-09-18 11:19:50,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c58416c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:50, skipping insertion in model container [2018-09-18 11:19:50,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:19:50" (1/1) ... [2018-09-18 11:19:50,343 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:19:50,974 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:19:50,994 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:19:51,227 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:19:51,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51 WrapperNode [2018-09-18 11:19:51,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:19:51,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:19:51,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:19:51,332 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:19:51,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:19:51,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:19:51,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:19:51,522 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:19:51,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (1/1) ... [2018-09-18 11:19:51,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:19:51,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:19:51,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:19:51,936 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:19:51,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (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 [2018-09-18 11:19:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:19:52,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:19:52,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:19:52,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:19:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:19:52,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:19:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:19:52,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:19:56,730 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:19:56,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:19:56 BoogieIcfgContainer [2018-09-18 11:19:56,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:19:56,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:19:56,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:19:56,736 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:19:56,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:19:50" (1/3) ... [2018-09-18 11:19:56,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b683cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:19:56, skipping insertion in model container [2018-09-18 11:19:56,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:51" (2/3) ... [2018-09-18 11:19:56,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b683cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:19:56, skipping insertion in model container [2018-09-18 11:19:56,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:19:56" (3/3) ... [2018-09-18 11:19:56,740 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label06_true-unreach-call.c [2018-09-18 11:19:56,748 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:19:56,759 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:19:56,812 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:19:56,814 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:19:56,814 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:19:56,814 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:19:56,814 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:19:56,814 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:19:56,815 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:19:56,815 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:19:56,815 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:19:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-18 11:19:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-18 11:19:56,857 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:56,858 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:19:56,859 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 712753892, now seen corresponding path program 1 times [2018-09-18 11:19:56,868 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:56,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:56,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:56,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:56,918 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:57,333 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:19:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:57,416 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:19:57,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:19:57,417 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:57,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:19:57,439 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:19:57,439 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:19:57,442 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-09-18 11:19:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:59,696 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-09-18 11:19:59,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:19:59,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2018-09-18 11:19:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:59,723 INFO L225 Difference]: With dead ends: 782 [2018-09-18 11:19:59,723 INFO L226 Difference]: Without dead ends: 487 [2018-09-18 11:19:59,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:19:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-09-18 11:19:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-09-18 11:19:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-09-18 11:19:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-09-18 11:19:59,826 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 70 [2018-09-18 11:19:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:59,827 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-09-18 11:19:59,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:19:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-09-18 11:19:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-18 11:19:59,838 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:59,838 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:19:59,839 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1109140143, now seen corresponding path program 1 times [2018-09-18 11:19:59,839 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:59,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:59,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:59,841 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:20:00,412 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:20:00,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-18 11:20:00,413 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:20:00,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:20:00,415 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:20:00,415 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:20:00,415 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-09-18 11:20:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:20:07,195 INFO L93 Difference]: Finished difference Result 1760 states and 3239 transitions. [2018-09-18 11:20:07,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 11:20:07,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2018-09-18 11:20:07,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:20:07,213 INFO L225 Difference]: With dead ends: 1760 [2018-09-18 11:20:07,214 INFO L226 Difference]: Without dead ends: 1284 [2018-09-18 11:20:07,221 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:20:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-09-18 11:20:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1037. [2018-09-18 11:20:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-09-18 11:20:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-09-18 11:20:07,342 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 145 [2018-09-18 11:20:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:20:07,342 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-09-18 11:20:07,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:20:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-09-18 11:20:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-18 11:20:07,355 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:20:07,357 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:20:07,357 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:20:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1947386976, now seen corresponding path program 1 times [2018-09-18 11:20:07,357 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:20:07,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:07,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:07,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:07,360 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:20:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 126 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:20:07,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:20:07,683 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 [2018-09-18 11:20:07,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:07,694 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:20:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:07,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:20:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-18 11:20:08,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:20:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 126 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:20:08,522 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:20:08,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 11:20:08,522 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:20:08,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:20:08,524 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:20:08,524 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:20:08,524 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 5 states. [2018-09-18 11:20:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:20:15,080 INFO L93 Difference]: Finished difference Result 3395 states and 5619 transitions. [2018-09-18 11:20:15,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:20:15,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2018-09-18 11:20:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:20:15,095 INFO L225 Difference]: With dead ends: 3395 [2018-09-18 11:20:15,095 INFO L226 Difference]: Without dead ends: 2364 [2018-09-18 11:20:15,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 431 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:20:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2018-09-18 11:20:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2323. [2018-09-18 11:20:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2323 states. [2018-09-18 11:20:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3627 transitions. [2018-09-18 11:20:15,180 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3627 transitions. Word has length 218 [2018-09-18 11:20:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:20:15,182 INFO L480 AbstractCegarLoop]: Abstraction has 2323 states and 3627 transitions. [2018-09-18 11:20:15,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:20:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3627 transitions. [2018-09-18 11:20:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-18 11:20:15,190 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:20:15,190 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, 3, 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] [2018-09-18 11:20:15,191 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:20:15,191 INFO L82 PathProgramCache]: Analyzing trace with hash 24877702, now seen corresponding path program 1 times [2018-09-18 11:20:15,191 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:20:15,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:15,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:15,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:15,193 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:20:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:16,128 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 5 [2018-09-18 11:20:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:20:16,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:20:16,223 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 [2018-09-18 11:20:16,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:16,236 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:20:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:16,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:20:41,854 WARN L178 SmtUtils]: Spent 22.99 s on a formula simplification. DAG size of input: 415 DAG size of output: 108 [2018-09-18 11:20:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:20:42,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:20:42,209 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-09-18 11:20:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:20:42,633 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:20:42,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-09-18 11:20:42,633 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:20:42,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:20:42,635 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:20:42,635 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=47, Unknown=1, NotChecked=0, Total=72 [2018-09-18 11:20:42,635 INFO L87 Difference]: Start difference. First operand 2323 states and 3627 transitions. Second operand 3 states. [2018-09-18 11:20:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:20:44,369 INFO L93 Difference]: Finished difference Result 6027 states and 9690 transitions. [2018-09-18 11:20:44,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:20:44,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 262 [2018-09-18 11:20:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:20:44,399 INFO L225 Difference]: With dead ends: 6027 [2018-09-18 11:20:44,400 INFO L226 Difference]: Without dead ends: 3710 [2018-09-18 11:20:44,414 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 523 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=24, Invalid=47, Unknown=1, NotChecked=0, Total=72 [2018-09-18 11:20:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2018-09-18 11:20:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3705. [2018-09-18 11:20:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3705 states. [2018-09-18 11:20:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5492 transitions. [2018-09-18 11:20:44,539 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5492 transitions. Word has length 262 [2018-09-18 11:20:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:20:44,540 INFO L480 AbstractCegarLoop]: Abstraction has 3705 states and 5492 transitions. [2018-09-18 11:20:44,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:20:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5492 transitions. [2018-09-18 11:20:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-18 11:20:44,562 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:20:44,562 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:20:44,563 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:20:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 633050955, now seen corresponding path program 1 times [2018-09-18 11:20:44,563 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:20:44,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:44,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:44,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:44,565 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:20:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-09-18 11:20:44,851 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:20:44,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:20:44,851 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:20:44,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:20:44,852 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:20:44,852 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:20:44,853 INFO L87 Difference]: Start difference. First operand 3705 states and 5492 transitions. Second operand 3 states. [2018-09-18 11:20:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:20:46,799 INFO L93 Difference]: Finished difference Result 9499 states and 14606 transitions. [2018-09-18 11:20:46,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:20:46,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 288 [2018-09-18 11:20:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:20:46,843 INFO L225 Difference]: With dead ends: 9499 [2018-09-18 11:20:46,843 INFO L226 Difference]: Without dead ends: 5800 [2018-09-18 11:20:46,873 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:20:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5800 states. [2018-09-18 11:20:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5800 to 5602. [2018-09-18 11:20:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5602 states. [2018-09-18 11:20:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 7909 transitions. [2018-09-18 11:20:47,039 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 7909 transitions. Word has length 288 [2018-09-18 11:20:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:20:47,041 INFO L480 AbstractCegarLoop]: Abstraction has 5602 states and 7909 transitions. [2018-09-18 11:20:47,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:20:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 7909 transitions. [2018-09-18 11:20:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-18 11:20:47,066 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:20:47,067 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:20:47,067 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:20:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash -784775536, now seen corresponding path program 1 times [2018-09-18 11:20:47,067 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:20:47,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:47,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:47,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:20:47,069 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:20:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-09-18 11:20:47,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:20:47,715 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:20:47,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:47,732 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:20:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:47,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:20:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:20:48,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:20:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:20:48,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:20:48,395 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:20:48,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:20:48,411 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:20:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:20:48,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:20:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:20:48,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:20:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:20:49,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:20:49,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-18 11:20:49,106 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:20:49,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:20:49,107 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:20:49,107 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-18 11:20:49,108 INFO L87 Difference]: Start difference. First operand 5602 states and 7909 transitions. Second operand 9 states. [2018-09-18 11:20:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:20:59,472 INFO L93 Difference]: Finished difference Result 14981 states and 25969 transitions. [2018-09-18 11:20:59,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-18 11:20:59,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 290 [2018-09-18 11:20:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:20:59,571 INFO L225 Difference]: With dead ends: 14981 [2018-09-18 11:20:59,571 INFO L226 Difference]: Without dead ends: 9385 [2018-09-18 11:20:59,684 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1223 GetRequests, 1172 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=480, Invalid=2070, Unknown=0, NotChecked=0, Total=2550 [2018-09-18 11:20:59,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9385 states. [2018-09-18 11:21:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 8850. [2018-09-18 11:21:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8850 states. [2018-09-18 11:21:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8850 states to 8850 states and 11654 transitions. [2018-09-18 11:21:00,104 INFO L78 Accepts]: Start accepts. Automaton has 8850 states and 11654 transitions. Word has length 290 [2018-09-18 11:21:00,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:21:00,105 INFO L480 AbstractCegarLoop]: Abstraction has 8850 states and 11654 transitions. [2018-09-18 11:21:00,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:21:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8850 states and 11654 transitions. [2018-09-18 11:21:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-09-18 11:21:00,137 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:21:00,138 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:21:00,138 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:21:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash 39633215, now seen corresponding path program 1 times [2018-09-18 11:21:00,139 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:21:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:00,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:00,140 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:21:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 131 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-18 11:21:01,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:01,281 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 [2018-09-18 11:21:01,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:01,291 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:01,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-18 11:21:01,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 131 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:21:02,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:02,046 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 [2018-09-18 11:21:02,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:02,065 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:02,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-18 11:21:02,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 131 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:21:02,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:21:02,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8, 7, 8] total 15 [2018-09-18 11:21:02,643 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:21:02,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 11:21:02,644 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 11:21:02,644 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2018-09-18 11:21:02,645 INFO L87 Difference]: Start difference. First operand 8850 states and 11654 transitions. Second operand 10 states. [2018-09-18 11:21:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:21:09,787 INFO L93 Difference]: Finished difference Result 25729 states and 38100 transitions. [2018-09-18 11:21:09,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-18 11:21:09,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 317 [2018-09-18 11:21:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:21:09,882 INFO L225 Difference]: With dead ends: 25729 [2018-09-18 11:21:09,882 INFO L226 Difference]: Without dead ends: 16885 [2018-09-18 11:21:09,921 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1288 GetRequests, 1262 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2018-09-18 11:21:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16885 states. [2018-09-18 11:21:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16885 to 16530. [2018-09-18 11:21:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16530 states. [2018-09-18 11:21:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 23536 transitions. [2018-09-18 11:21:10,464 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 23536 transitions. Word has length 317 [2018-09-18 11:21:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:21:10,465 INFO L480 AbstractCegarLoop]: Abstraction has 16530 states and 23536 transitions. [2018-09-18 11:21:10,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 11:21:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 23536 transitions. [2018-09-18 11:21:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-18 11:21:10,543 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:21:10,544 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, 4, 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] [2018-09-18 11:21:10,544 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:21:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash -350992589, now seen corresponding path program 1 times [2018-09-18 11:21:10,545 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:21:10,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:10,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:10,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:10,546 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:21:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 265 proven. 72 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:21:11,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:11,103 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 [2018-09-18 11:21:11,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:11,121 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:11,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 370 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-18 11:21:11,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:11,981 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 11:21:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 265 proven. 72 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:21:12,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:12,596 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 [2018-09-18 11:21:12,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:12,611 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:12,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 370 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-18 11:21:13,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 265 proven. 72 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:21:13,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:21:13,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 11:21:13,205 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:21:13,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:21:13,206 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:21:13,206 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:21:13,206 INFO L87 Difference]: Start difference. First operand 16530 states and 23536 transitions. Second operand 9 states. [2018-09-18 11:21:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:21:18,091 INFO L93 Difference]: Finished difference Result 35324 states and 53160 transitions. [2018-09-18 11:21:18,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 11:21:18,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 363 [2018-09-18 11:21:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:21:18,191 INFO L225 Difference]: With dead ends: 35324 [2018-09-18 11:21:18,191 INFO L226 Difference]: Without dead ends: 19307 [2018-09-18 11:21:18,263 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1468 GetRequests, 1446 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-18 11:21:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19307 states. [2018-09-18 11:21:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19307 to 18966. [2018-09-18 11:21:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18966 states. [2018-09-18 11:21:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18966 states to 18966 states and 26597 transitions. [2018-09-18 11:21:18,822 INFO L78 Accepts]: Start accepts. Automaton has 18966 states and 26597 transitions. Word has length 363 [2018-09-18 11:21:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:21:18,823 INFO L480 AbstractCegarLoop]: Abstraction has 18966 states and 26597 transitions. [2018-09-18 11:21:18,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:21:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 18966 states and 26597 transitions. [2018-09-18 11:21:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2018-09-18 11:21:18,871 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:21:18,871 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:21:18,872 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:21:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1205183860, now seen corresponding path program 1 times [2018-09-18 11:21:18,872 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:21:18,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:18,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:18,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:18,873 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:21:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:21:19,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:19,648 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 [2018-09-18 11:21:19,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:19,662 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:19,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:21:20,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:21:20,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:20,753 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 [2018-09-18 11:21:20,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:20,769 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:21,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 263 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:21:21,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:21:21,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:21:21,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 9 [2018-09-18 11:21:21,370 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:21:21,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:21:21,371 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:21:21,372 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:21:21,372 INFO L87 Difference]: Start difference. First operand 18966 states and 26597 transitions. Second operand 7 states. [2018-09-18 11:21:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:21:23,814 INFO L93 Difference]: Finished difference Result 41367 states and 63388 transitions. [2018-09-18 11:21:23,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:21:23,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 364 [2018-09-18 11:21:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:21:23,931 INFO L225 Difference]: With dead ends: 41367 [2018-09-18 11:21:23,931 INFO L226 Difference]: Without dead ends: 22914 [2018-09-18 11:21:24,007 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1452 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:21:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22914 states. [2018-09-18 11:21:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22914 to 21768. [2018-09-18 11:21:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21768 states. [2018-09-18 11:21:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21768 states to 21768 states and 28798 transitions. [2018-09-18 11:21:24,811 INFO L78 Accepts]: Start accepts. Automaton has 21768 states and 28798 transitions. Word has length 364 [2018-09-18 11:21:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:21:24,812 INFO L480 AbstractCegarLoop]: Abstraction has 21768 states and 28798 transitions. [2018-09-18 11:21:24,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:21:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21768 states and 28798 transitions. [2018-09-18 11:21:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-09-18 11:21:24,861 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:21:24,862 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:21:24,862 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:21:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1808165704, now seen corresponding path program 1 times [2018-09-18 11:21:24,862 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:21:24,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:24,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:24,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:24,864 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:21:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-09-18 11:21:25,180 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:21:25,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:21:25,181 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:21:25,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:21:25,182 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:21:25,182 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:21:25,182 INFO L87 Difference]: Start difference. First operand 21768 states and 28798 transitions. Second operand 3 states. [2018-09-18 11:21:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:21:27,230 INFO L93 Difference]: Finished difference Result 41095 states and 54729 transitions. [2018-09-18 11:21:27,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:21:27,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 412 [2018-09-18 11:21:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:21:27,301 INFO L225 Difference]: With dead ends: 41095 [2018-09-18 11:21:27,301 INFO L226 Difference]: Without dead ends: 21136 [2018-09-18 11:21:27,377 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:21:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21136 states. [2018-09-18 11:21:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21136 to 21107. [2018-09-18 11:21:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21107 states. [2018-09-18 11:21:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21107 states to 21107 states and 26798 transitions. [2018-09-18 11:21:27,853 INFO L78 Accepts]: Start accepts. Automaton has 21107 states and 26798 transitions. Word has length 412 [2018-09-18 11:21:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:21:27,854 INFO L480 AbstractCegarLoop]: Abstraction has 21107 states and 26798 transitions. [2018-09-18 11:21:27,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:21:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 21107 states and 26798 transitions. [2018-09-18 11:21:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-09-18 11:21:27,895 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:21:27,895 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:21:27,896 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:21:27,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1007106465, now seen corresponding path program 1 times [2018-09-18 11:21:27,896 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:21:27,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:27,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:27,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:21:27,897 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:21:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 195 proven. 217 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-18 11:21:28,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:28,341 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:21:28,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:28,349 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:28,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-18 11:21:31,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 300 proven. 107 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-18 11:21:32,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:21:32,135 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:21:32,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:21:32,151 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:21:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:21:32,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:21:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 347 proven. 107 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-09-18 11:21:34,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:21:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 300 proven. 107 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-18 11:21:34,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:21:34,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5, 8, 5] total 15 [2018-09-18 11:21:34,996 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:21:34,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 11:21:34,996 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 11:21:34,997 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=150, Unknown=3, NotChecked=0, Total=210 [2018-09-18 11:21:34,997 INFO L87 Difference]: Start difference. First operand 21107 states and 26798 transitions. Second operand 10 states. [2018-09-18 11:21:40,508 WARN L178 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-18 11:24:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:24:02,812 INFO L93 Difference]: Finished difference Result 58877 states and 89540 transitions. [2018-09-18 11:24:02,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-18 11:24:02,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 425 [2018-09-18 11:24:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:24:02,988 INFO L225 Difference]: With dead ends: 58877 [2018-09-18 11:24:02,988 INFO L226 Difference]: Without dead ends: 38283 [2018-09-18 11:24:03,068 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1741 GetRequests, 1704 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=235, Invalid=743, Unknown=14, NotChecked=0, Total=992 [2018-09-18 11:24:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38283 states. [2018-09-18 11:24:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38283 to 36346. [2018-09-18 11:24:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36346 states. [2018-09-18 11:24:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36346 states to 36346 states and 47991 transitions. [2018-09-18 11:24:04,215 INFO L78 Accepts]: Start accepts. Automaton has 36346 states and 47991 transitions. Word has length 425 [2018-09-18 11:24:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:24:04,215 INFO L480 AbstractCegarLoop]: Abstraction has 36346 states and 47991 transitions. [2018-09-18 11:24:04,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 11:24:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 36346 states and 47991 transitions. [2018-09-18 11:24:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-09-18 11:24:04,283 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:24:04,283 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:24:04,283 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:24:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1340263565, now seen corresponding path program 1 times [2018-09-18 11:24:04,284 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:24:04,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:04,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:04,285 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:24:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:05,200 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 16 Received shutdown request... [2018-09-18 11:24:05,375 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:24:05,379 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:24:05,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:24:05 BoogieIcfgContainer [2018-09-18 11:24:05,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:24:05,380 INFO L168 Benchmark]: Toolchain (without parser) took 255070.26 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -808.3 MB). Peak memory consumption was 984.3 MB. Max. memory is 7.1 GB. [2018-09-18 11:24:05,381 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 11:24:05,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1013.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:24:05,382 INFO L168 Benchmark]: Boogie Procedure Inliner took 190.49 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:24:05,383 INFO L168 Benchmark]: Boogie Preprocessor took 412.81 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 807.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -940.3 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. [2018-09-18 11:24:05,384 INFO L168 Benchmark]: RCFGBuilder took 4796.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 181.9 MB). Peak memory consumption was 181.9 MB. Max. memory is 7.1 GB. [2018-09-18 11:24:05,385 INFO L168 Benchmark]: TraceAbstraction took 248646.78 ms. Allocated memory was 2.3 GB in the beginning and 3.3 GB in the end (delta: 984.6 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -144.9 MB). Peak memory consumption was 839.7 MB. Max. memory is 7.1 GB. [2018-09-18 11:24:05,389 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1013.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 190.49 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 412.81 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 807.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -940.3 MB). Peak memory consumption was 49.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4796.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 181.9 MB). Peak memory consumption was 181.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 248646.78 ms. Allocated memory was 2.3 GB in the beginning and 3.3 GB in the end (delta: 984.6 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -144.9 MB). Peak memory consumption was 839.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 195]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 195). Cancelled while BasicCegarLoop was analyzing trace of length 433 with TraceHistMax 4, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 248.5s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 195.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2197 SDtfs, 12551 SDslu, 2794 SDs, 0 SdLazy, 24443 SolverSat, 5513 SolverUnsat, 71 SolverUnknown, 0 SolverNotchecked, 166.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8190 GetRequests, 8002 SyntacticMatches, 29 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 53.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36346occurred 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: 4.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 4839 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 43.0s InterpolantComputationTime, 7152 NumberOfCodeBlocks, 7152 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 11115 ConstructedInterpolants, 5 QuantifiedInterpolants, 10069475 SizeOfPredicates, 13 NumberOfNonLiveVariables, 6727 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 9467/11245 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label06_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-24-05-403.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label06_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-24-05-403.csv Completed graceful shutdown