java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label00_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:11:30,934 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:11:30,936 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:11:30,948 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:11:30,949 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:11:30,950 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:11:30,951 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:11:30,953 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:11:30,955 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:11:30,956 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:11:30,956 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:11:30,957 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:11:30,958 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:11:30,959 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:11:30,960 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:11:30,961 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:11:30,961 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:11:30,963 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:11:30,965 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:11:30,967 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:11:30,968 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:11:30,969 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:11:30,972 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:11:30,972 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:11:30,972 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:11:30,973 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:11:30,974 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:11:30,975 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:11:30,976 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:11:30,977 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:11:30,978 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:11:30,978 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:11:30,978 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:11:30,979 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:11:30,980 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:11:30,980 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:11:30,981 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:11:31,005 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:11:31,006 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:11:31,008 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:11:31,008 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:11:31,009 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:11:31,009 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:11:31,009 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:11:31,009 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:11:31,010 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:11:31,010 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:11:31,010 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:11:31,010 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:11:31,011 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:11:31,011 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:11:31,011 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:11:31,011 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:11:31,012 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:11:31,013 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:11:31,013 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:11:31,013 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:11:31,014 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:11:31,014 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:11:31,014 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:11:31,014 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:11:31,014 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:11:31,015 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:11:31,016 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:11:31,016 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:11:31,016 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:11:31,016 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:11:31,016 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:11:31,017 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:11:31,017 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:11:31,017 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:11:31,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:11:31,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:11:31,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:11:31,099 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:11:31,099 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:11:31,100 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label00_true-unreach-call.c [2018-10-27 14:11:31,170 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1fe1b3551/8ac76c620f524cc08b042ba8497e56e2/FLAG8599759ea [2018-10-27 14:11:31,917 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:11:31,918 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label00_true-unreach-call.c [2018-10-27 14:11:31,955 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1fe1b3551/8ac76c620f524cc08b042ba8497e56e2/FLAG8599759ea [2018-10-27 14:11:31,972 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1fe1b3551/8ac76c620f524cc08b042ba8497e56e2 [2018-10-27 14:11:31,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:11:31,986 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:11:31,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:11:31,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:11:31,991 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:11:31,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:11:31" (1/1) ... [2018-10-27 14:11:31,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9d4948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:31, skipping insertion in model container [2018-10-27 14:11:31,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:11:31" (1/1) ... [2018-10-27 14:11:32,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:11:32,191 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:11:33,741 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:11:33,745 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:11:34,481 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:11:34,521 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:11:34,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34 WrapperNode [2018-10-27 14:11:34,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:11:34,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:11:34,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:11:34,524 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:11:34,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:34,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:11:35,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:11:35,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:11:35,135 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:11:35,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... [2018-10-27 14:11:35,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:11:35,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:11:35,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:11:35,492 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:11:35,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:11:35,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:11:35,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:11:35,562 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 14:11:35,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 14:11:35,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 14:11:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 14:11:35,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:11:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:11:35,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:11:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:11:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:11:35,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:11:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:11:35,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:11:46,418 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:11:46,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:11:46 BoogieIcfgContainer [2018-10-27 14:11:46,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:11:46,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:11:46,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:11:46,423 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:11:46,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:11:31" (1/3) ... [2018-10-27 14:11:46,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296b80db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:11:46, skipping insertion in model container [2018-10-27 14:11:46,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:34" (2/3) ... [2018-10-27 14:11:46,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@296b80db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:11:46, skipping insertion in model container [2018-10-27 14:11:46,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:11:46" (3/3) ... [2018-10-27 14:11:46,427 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label00_true-unreach-call.c [2018-10-27 14:11:46,437 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:11:46,447 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:11:46,465 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:11:46,514 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:11:46,514 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:11:46,514 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:11:46,515 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:11:46,515 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:11:46,515 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:11:46,515 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:11:46,515 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:11:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-27 14:11:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-27 14:11:46,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:11:46,576 INFO L375 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] [2018-10-27 14:11:46,578 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:11:46,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:11:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash -920036068, now seen corresponding path program 1 times [2018-10-27 14:11:46,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:11:46,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:11:46,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:11:46,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:11:46,630 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:11:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:11:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:11:47,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:11:47,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:11:47,076 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:11:47,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:11:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:11:47,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:11:47,104 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-10-27 14:12:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:12:02,401 INFO L93 Difference]: Finished difference Result 3968 states and 7392 transitions. [2018-10-27 14:12:02,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:12:02,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-10-27 14:12:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:12:02,484 INFO L225 Difference]: With dead ends: 3968 [2018-10-27 14:12:02,485 INFO L226 Difference]: Without dead ends: 2842 [2018-10-27 14:12:02,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:12:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-10-27 14:12:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1981. [2018-10-27 14:12:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1981 states. [2018-10-27 14:12:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3456 transitions. [2018-10-27 14:12:02,706 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3456 transitions. Word has length 44 [2018-10-27 14:12:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:12:02,707 INFO L481 AbstractCegarLoop]: Abstraction has 1981 states and 3456 transitions. [2018-10-27 14:12:02,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:12:02,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3456 transitions. [2018-10-27 14:12:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-27 14:12:02,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:12:02,723 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:12:02,723 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:12:02,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:12:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash 673844312, now seen corresponding path program 1 times [2018-10-27 14:12:02,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:12:02,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:02,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:12:02,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:02,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:12:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:12:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:12:03,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:12:03,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:12:03,057 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:12:03,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:12:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:12:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:12:03,060 INFO L87 Difference]: Start difference. First operand 1981 states and 3456 transitions. Second operand 5 states. [2018-10-27 14:12:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:12:19,319 INFO L93 Difference]: Finished difference Result 5673 states and 10081 transitions. [2018-10-27 14:12:19,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:12:19,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2018-10-27 14:12:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:12:19,347 INFO L225 Difference]: With dead ends: 5673 [2018-10-27 14:12:19,347 INFO L226 Difference]: Without dead ends: 3698 [2018-10-27 14:12:19,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:12:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3698 states. [2018-10-27 14:12:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3698 to 3687. [2018-10-27 14:12:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3687 states. [2018-10-27 14:12:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 5870 transitions. [2018-10-27 14:12:19,475 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 5870 transitions. Word has length 114 [2018-10-27 14:12:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:12:19,476 INFO L481 AbstractCegarLoop]: Abstraction has 3687 states and 5870 transitions. [2018-10-27 14:12:19,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:12:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 5870 transitions. [2018-10-27 14:12:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-27 14:12:19,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:12:19,488 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:12:19,489 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:12:19,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:12:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1072616972, now seen corresponding path program 1 times [2018-10-27 14:12:19,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:12:19,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:19,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:12:19,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:19,493 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:12:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:12:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:12:19,724 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:12:19,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:12:19,725 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:12:19,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:12:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:12:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:12:19,726 INFO L87 Difference]: Start difference. First operand 3687 states and 5870 transitions. Second operand 5 states. [2018-10-27 14:12:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:12:37,654 INFO L93 Difference]: Finished difference Result 10963 states and 17865 transitions. [2018-10-27 14:12:37,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:12:37,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-10-27 14:12:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:12:37,709 INFO L225 Difference]: With dead ends: 10963 [2018-10-27 14:12:37,709 INFO L226 Difference]: Without dead ends: 7282 [2018-10-27 14:12:37,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:12:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2018-10-27 14:12:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 7175. [2018-10-27 14:12:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7175 states. [2018-10-27 14:12:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 10520 transitions. [2018-10-27 14:12:37,948 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 10520 transitions. Word has length 116 [2018-10-27 14:12:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:12:37,949 INFO L481 AbstractCegarLoop]: Abstraction has 7175 states and 10520 transitions. [2018-10-27 14:12:37,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:12:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 10520 transitions. [2018-10-27 14:12:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-27 14:12:37,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:12:37,955 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:12:37,955 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:12:37,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:12:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2080422020, now seen corresponding path program 1 times [2018-10-27 14:12:37,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:12:37,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:37,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:12:37,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:12:37,958 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:12:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:12:38,563 WARN L179 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-10-27 14:12:38,916 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-27 14:12:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:12:39,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:12:39,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:12:39,066 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:12:39,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:12:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:12:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:12:39,067 INFO L87 Difference]: Start difference. First operand 7175 states and 10520 transitions. Second operand 6 states. [2018-10-27 14:13:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:13:11,526 INFO L93 Difference]: Finished difference Result 18116 states and 26151 transitions. [2018-10-27 14:13:11,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 14:13:11,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2018-10-27 14:13:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:13:11,572 INFO L225 Difference]: With dead ends: 18116 [2018-10-27 14:13:11,573 INFO L226 Difference]: Without dead ends: 10947 [2018-10-27 14:13:11,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:13:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2018-10-27 14:13:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 10597. [2018-10-27 14:13:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10597 states. [2018-10-27 14:13:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 14745 transitions. [2018-10-27 14:13:11,873 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 14745 transitions. Word has length 160 [2018-10-27 14:13:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:13:11,874 INFO L481 AbstractCegarLoop]: Abstraction has 10597 states and 14745 transitions. [2018-10-27 14:13:11,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:13:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 14745 transitions. [2018-10-27 14:13:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-27 14:13:11,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:13:11,878 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:13:11,879 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:13:11,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:13:11,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2003986425, now seen corresponding path program 1 times [2018-10-27 14:13:11,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:13:11,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:11,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:13:11,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:11,880 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:13:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:13:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:13:12,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:13:12,457 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:13:12,458 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2018-10-27 14:13:12,461 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2879], [2881], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3366], [3370], [3374], [3378], [3382], [3386], [3390], [3394], [3398], [3402], [3406], [3409], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-27 14:13:12,511 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:13:12,511 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:13:13,503 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:13:14,138 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:13:14,140 INFO L272 AbstractInterpreter]: Visited 138 different actions 400 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:13:14,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:13:14,191 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:13:14,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:13:14,191 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:13:14,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:13:14,211 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:13:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:13:14,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:13:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:13:14,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:13:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:13:15,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:13:15,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-10-27 14:13:15,741 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:13:15,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:13:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:13:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-27 14:13:15,742 INFO L87 Difference]: Start difference. First operand 10597 states and 14745 transitions. Second operand 6 states. [2018-10-27 14:13:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:13:39,036 INFO L93 Difference]: Finished difference Result 38967 states and 58287 transitions. [2018-10-27 14:13:39,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 14:13:39,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2018-10-27 14:13:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:13:39,162 INFO L225 Difference]: With dead ends: 38967 [2018-10-27 14:13:39,163 INFO L226 Difference]: Without dead ends: 29185 [2018-10-27 14:13:39,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-27 14:13:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29185 states. [2018-10-27 14:13:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29185 to 28974. [2018-10-27 14:13:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28974 states. [2018-10-27 14:13:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28974 states to 28974 states and 41267 transitions. [2018-10-27 14:13:39,955 INFO L78 Accepts]: Start accepts. Automaton has 28974 states and 41267 transitions. Word has length 174 [2018-10-27 14:13:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:13:39,956 INFO L481 AbstractCegarLoop]: Abstraction has 28974 states and 41267 transitions. [2018-10-27 14:13:39,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:13:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 28974 states and 41267 transitions. [2018-10-27 14:13:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-27 14:13:39,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:13:39,961 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 14:13:39,962 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:13:39,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:13:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1640504864, now seen corresponding path program 1 times [2018-10-27 14:13:39,962 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:13:39,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:39,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:13:39,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:13:39,964 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:13:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:13:40,220 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:13:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 74 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:13:40,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:13:40,611 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:13:40,611 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-10-27 14:13:40,611 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2879], [2881], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3128], [3129], [3133], [3137], [3148], [3152], [3156], [3159], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-27 14:13:40,625 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:13:40,625 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:13:41,143 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:14:05,267 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:14:05,268 INFO L272 AbstractInterpreter]: Visited 83 different actions 83 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 14:14:05,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:14:05,277 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:14:25,558 INFO L227 lantSequenceWeakener]: Weakened 172 states. On average, predicates are now at 71.59% of their original sizes. [2018-10-27 14:14:25,559 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:14:25,925 INFO L415 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2018-10-27 14:14:25,926 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:14:25,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:14:25,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-10-27 14:14:25,926 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:14:25,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 14:14:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 14:14:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:14:25,927 INFO L87 Difference]: Start difference. First operand 28974 states and 41267 transitions. Second operand 9 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown