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/Problem12_label52_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:19:04,397 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:19:04,402 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:19:04,422 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:19:04,422 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:19:04,423 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:19:04,425 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:19:04,427 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:19:04,430 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:19:04,431 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:19:04,433 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:19:04,433 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:19:04,435 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:19:04,436 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:19:04,442 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:19:04,443 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:19:04,447 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:19:04,449 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:19:04,454 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:19:04,458 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:19:04,459 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:19:04,460 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:19:04,467 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:19:04,468 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:19:04,468 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:19:04,469 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:19:04,470 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:19:04,471 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:19:04,476 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:19:04,477 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:19:04,477 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:19:04,478 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 11:19:04,478 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 11:19:04,478 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 11:19:04,481 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 11:19:04,482 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 11:19:04,482 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 11:19:04,507 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:19:04,508 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:19:04,508 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:19:04,509 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:19:04,509 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:19:04,510 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:19:04,510 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:19:04,510 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:19:04,510 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:19:04,511 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:19:04,511 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:19:04,511 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:19:04,512 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:19:04,512 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:19:04,512 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:19:04,512 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:19:04,513 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:19:04,513 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:19:04,513 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:19:04,513 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:19:04,513 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:19:04,514 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:19:04,515 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:19:04,515 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:19:04,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:19:04,515 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:19:04,516 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:19:04,516 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:19:04,516 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:19:04,516 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:19:04,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:19:04,516 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:19:04,517 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:19:04,517 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:19:04,582 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:19:04,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:19:04,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:19:04,608 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:19:04,609 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:19:04,610 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label52_false-unreach-call.c [2018-10-27 11:19:04,674 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ab8db9a91/45a2664e1d6146fa8c97c7d1cf480c41/FLAGdfe5eb0c2 [2018-10-27 11:19:05,417 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:19:05,418 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label52_false-unreach-call.c [2018-10-27 11:19:05,450 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ab8db9a91/45a2664e1d6146fa8c97c7d1cf480c41/FLAGdfe5eb0c2 [2018-10-27 11:19:05,472 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ab8db9a91/45a2664e1d6146fa8c97c7d1cf480c41 [2018-10-27 11:19:05,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:19:05,488 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:19:05,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:19:05,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:19:05,495 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:19:05,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:19:05" (1/1) ... [2018-10-27 11:19:05,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542f3197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:05, skipping insertion in model container [2018-10-27 11:19:05,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:19:05" (1/1) ... [2018-10-27 11:19:05,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:19:05,678 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:19:07,055 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:19:07,061 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:19:07,681 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:19:07,717 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:19:07,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07 WrapperNode [2018-10-27 11:19:07,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:19:07,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:19:07,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:19:07,719 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:19:07,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:07,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:19:08,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:19:08,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:19:08,231 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:19:08,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (1/1) ... [2018-10-27 11:19:08,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:19:08,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:19:08,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:19:08,578 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:19:08,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (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 11:19:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:19:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:19:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-27 11:19:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-27 11:19:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 11:19:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 11:19:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 11:19:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 11:19:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:19:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:19:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:19:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:19:08,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:19:08,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:19:21,723 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:19:21,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:19:21 BoogieIcfgContainer [2018-10-27 11:19:21,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:19:21,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:19:21,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:19:21,728 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:19:21,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:19:05" (1/3) ... [2018-10-27 11:19:21,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5410a723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:19:21, skipping insertion in model container [2018-10-27 11:19:21,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:19:07" (2/3) ... [2018-10-27 11:19:21,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5410a723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:19:21, skipping insertion in model container [2018-10-27 11:19:21,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:19:21" (3/3) ... [2018-10-27 11:19:21,732 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label52_false-unreach-call.c [2018-10-27 11:19:21,743 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:19:21,753 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:19:21,770 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:19:21,825 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:19:21,826 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:19:21,826 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:19:21,826 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:19:21,826 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:19:21,826 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:19:21,826 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:19:21,827 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:19:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-27 11:19:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-27 11:19:21,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:21,881 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] [2018-10-27 11:19:21,884 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:21,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash -785798829, now seen corresponding path program 1 times [2018-10-27 11:19:21,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:21,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:21,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:21,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:21,949 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:22,398 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 11:19:22,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:22,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 11:19:22,403 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:22,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:19:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:19:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 11:19:22,435 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-10-27 11:19:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:19:31,083 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-10-27 11:19:31,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:19:31,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2018-10-27 11:19:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:19:31,133 INFO L225 Difference]: With dead ends: 2446 [2018-10-27 11:19:31,134 INFO L226 Difference]: Without dead ends: 1604 [2018-10-27 11:19:31,154 INFO L605 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 [2018-10-27 11:19:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-10-27 11:19:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-10-27 11:19:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-27 11:19:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2909 transitions. [2018-10-27 11:19:31,348 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2909 transitions. Word has length 37 [2018-10-27 11:19:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:19:31,349 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 2909 transitions. [2018-10-27 11:19:31,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:19:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2909 transitions. [2018-10-27 11:19:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-27 11:19:31,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:31,360 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:19:31,361 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:31,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash -433018420, now seen corresponding path program 1 times [2018-10-27 11:19:31,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:31,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:31,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:31,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:31,366 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:31,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:31,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 11:19:31,740 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:31,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 11:19:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 11:19:31,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 11:19:31,743 INFO L87 Difference]: Start difference. First operand 1604 states and 2909 transitions. Second operand 5 states. [2018-10-27 11:19:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:19:44,865 INFO L93 Difference]: Finished difference Result 4818 states and 8826 transitions. [2018-10-27 11:19:44,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:19:44,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2018-10-27 11:19:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:19:44,892 INFO L225 Difference]: With dead ends: 4818 [2018-10-27 11:19:44,892 INFO L226 Difference]: Without dead ends: 3220 [2018-10-27 11:19:44,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:19:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2018-10-27 11:19:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3186. [2018-10-27 11:19:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2018-10-27 11:19:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 5594 transitions. [2018-10-27 11:19:44,998 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 5594 transitions. Word has length 111 [2018-10-27 11:19:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:19:44,999 INFO L481 AbstractCegarLoop]: Abstraction has 3186 states and 5594 transitions. [2018-10-27 11:19:44,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 11:19:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 5594 transitions. [2018-10-27 11:19:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-27 11:19:45,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:19:45,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:19:45,003 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:19:45,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:19:45,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1430780731, now seen corresponding path program 1 times [2018-10-27 11:19:45,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:19:45,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:45,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:19:45,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:19:45,005 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:19:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:19:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:19:45,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:19:45,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:19:45,438 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:19:45,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:19:45,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:19:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:19:45,439 INFO L87 Difference]: Start difference. First operand 3186 states and 5594 transitions. Second operand 6 states. [2018-10-27 11:20:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:20:00,894 INFO L93 Difference]: Finished difference Result 11148 states and 19850 transitions. [2018-10-27 11:20:00,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:20:00,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-10-27 11:20:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:20:00,952 INFO L225 Difference]: With dead ends: 11148 [2018-10-27 11:20:00,952 INFO L226 Difference]: Without dead ends: 7968 [2018-10-27 11:20:00,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:20:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2018-10-27 11:20:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 7924. [2018-10-27 11:20:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7924 states. [2018-10-27 11:20:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7924 states to 7924 states and 13426 transitions. [2018-10-27 11:20:01,188 INFO L78 Accepts]: Start accepts. Automaton has 7924 states and 13426 transitions. Word has length 116 [2018-10-27 11:20:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:20:01,189 INFO L481 AbstractCegarLoop]: Abstraction has 7924 states and 13426 transitions. [2018-10-27 11:20:01,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:20:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7924 states and 13426 transitions. [2018-10-27 11:20:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-27 11:20:01,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:20:01,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:20:01,193 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:20:01,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:01,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1344146005, now seen corresponding path program 1 times [2018-10-27 11:20:01,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:20:01,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:01,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:20:01,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:01,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:20:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:20:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:20:01,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:20:01,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:20:01,382 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:20:01,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:20:01,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:20:01,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:20:01,384 INFO L87 Difference]: Start difference. First operand 7924 states and 13426 transitions. Second operand 6 states. [2018-10-27 11:20:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:20:11,396 INFO L93 Difference]: Finished difference Result 22224 states and 38010 transitions. [2018-10-27 11:20:11,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:20:11,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-10-27 11:20:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:20:11,493 INFO L225 Difference]: With dead ends: 22224 [2018-10-27 11:20:11,493 INFO L226 Difference]: Without dead ends: 14306 [2018-10-27 11:20:11,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:20:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14306 states. [2018-10-27 11:20:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14306 to 14219. [2018-10-27 11:20:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14219 states. [2018-10-27 11:20:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14219 states to 14219 states and 21552 transitions. [2018-10-27 11:20:11,906 INFO L78 Accepts]: Start accepts. Automaton has 14219 states and 21552 transitions. Word has length 124 [2018-10-27 11:20:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:20:11,906 INFO L481 AbstractCegarLoop]: Abstraction has 14219 states and 21552 transitions. [2018-10-27 11:20:11,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:20:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 14219 states and 21552 transitions. [2018-10-27 11:20:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-27 11:20:11,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:20:11,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:20:11,911 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:20:11,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1223245544, now seen corresponding path program 1 times [2018-10-27 11:20:11,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:20:11,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:11,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:20:11,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:11,914 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:20:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:20:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:20:12,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:20:12,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:20:12,412 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:20:12,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:20:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:20:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:20:12,416 INFO L87 Difference]: Start difference. First operand 14219 states and 21552 transitions. Second operand 6 states. [2018-10-27 11:20:33,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:20:33,527 INFO L93 Difference]: Finished difference Result 56456 states and 95984 transitions. [2018-10-27 11:20:33,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 11:20:33,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2018-10-27 11:20:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:20:33,818 INFO L225 Difference]: With dead ends: 56456 [2018-10-27 11:20:33,818 INFO L226 Difference]: Without dead ends: 42243 [2018-10-27 11:20:33,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 11:20:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42243 states. [2018-10-27 11:20:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42243 to 42003. [2018-10-27 11:20:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42003 states. [2018-10-27 11:20:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42003 states to 42003 states and 62984 transitions. [2018-10-27 11:20:35,688 INFO L78 Accepts]: Start accepts. Automaton has 42003 states and 62984 transitions. Word has length 141 [2018-10-27 11:20:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:20:35,688 INFO L481 AbstractCegarLoop]: Abstraction has 42003 states and 62984 transitions. [2018-10-27 11:20:35,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:20:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 42003 states and 62984 transitions. [2018-10-27 11:20:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-27 11:20:35,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:20:35,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:20:35,695 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:20:35,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:35,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1761661121, now seen corresponding path program 1 times [2018-10-27 11:20:35,696 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:20:35,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:35,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:20:35,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:35,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:20:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:20:36,014 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:20:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:20:36,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:20:36,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:20:36,425 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:20:36,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:20:36,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:20:36,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:20:36,426 INFO L87 Difference]: Start difference. First operand 42003 states and 62984 transitions. Second operand 6 states. [2018-10-27 11:20:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:20:51,378 INFO L93 Difference]: Finished difference Result 104625 states and 165922 transitions. [2018-10-27 11:20:51,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:20:51,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2018-10-27 11:20:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:20:51,678 INFO L225 Difference]: With dead ends: 104625 [2018-10-27 11:20:51,678 INFO L226 Difference]: Without dead ends: 62628 [2018-10-27 11:20:51,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:20:51,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62628 states. [2018-10-27 11:20:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62628 to 62378. [2018-10-27 11:20:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62378 states. [2018-10-27 11:20:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62378 states to 62378 states and 87794 transitions. [2018-10-27 11:20:53,456 INFO L78 Accepts]: Start accepts. Automaton has 62378 states and 87794 transitions. Word has length 162 [2018-10-27 11:20:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:20:53,457 INFO L481 AbstractCegarLoop]: Abstraction has 62378 states and 87794 transitions. [2018-10-27 11:20:53,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:20:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 62378 states and 87794 transitions. [2018-10-27 11:20:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-27 11:20:53,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:20:53,472 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 11:20:53,475 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:20:53,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -666775580, now seen corresponding path program 1 times [2018-10-27 11:20:53,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:20:53,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:53,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:20:53,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:20:53,483 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:20:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:20:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 60 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 11:20:53,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:20:53,744 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:20:53,745 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-10-27 11:20:53,747 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2063], [2065], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2424], [2425], [2428], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-27 11:20:53,792 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:20:53,793 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:20:54,244 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:20:54,246 INFO L272 AbstractInterpreter]: Visited 92 different actions 92 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 11:20:54,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:20:54,272 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:20:54,871 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 75.35% of their original sizes. [2018-10-27 11:20:54,872 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:20:55,227 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-10-27 11:20:55,227 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:20:55,231 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:20:55,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2018-10-27 11:20:55,231 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:20:55,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 11:20:55,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 11:20:55,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 11:20:55,233 INFO L87 Difference]: Start difference. First operand 62378 states and 87794 transitions. Second operand 7 states. [2018-10-27 11:21:01,106 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown