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/Problem14_label17_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:24:10,703 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:24:10,705 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:24:10,722 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:24:10,722 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:24:10,723 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:24:10,724 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:24:10,726 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:24:10,728 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:24:10,729 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:24:10,730 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:24:10,730 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:24:10,731 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:24:10,732 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:24:10,733 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:24:10,734 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:24:10,735 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:24:10,738 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:24:10,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:24:10,749 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:24:10,750 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:24:10,752 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:24:10,756 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:24:10,756 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:24:10,756 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:24:10,760 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:24:10,761 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:24:10,764 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:24:10,765 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:24:10,767 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:24:10,769 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:24:10,769 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:24:10,770 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:24:10,770 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:24:10,771 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:24:10,772 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:24:10,772 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 14:24:10,793 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:24:10,793 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:24:10,794 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:24:10,794 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:24:10,794 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:24:10,795 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:24:10,795 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:24:10,795 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:24:10,795 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:24:10,795 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:24:10,796 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:24:10,796 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:24:10,797 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:24:10,797 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:24:10,797 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:24:10,797 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:24:10,798 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:24:10,798 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:24:10,798 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:24:10,798 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:24:10,798 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:24:10,799 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:24:10,799 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:24:10,799 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:24:10,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:24:10,800 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:24:10,800 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:24:10,800 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:24:10,800 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:24:10,800 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:24:10,801 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:24:10,801 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:24:10,801 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:24:10,801 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:24:10,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:24:10,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:24:10,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:24:10,876 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:24:10,876 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:24:10,877 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c [2018-10-27 14:24:10,950 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0ad563983/0566b5d563724a5cbcd7d87b81e4faa4/FLAG9111e9967 [2018-10-27 14:24:11,583 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:24:11,584 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label17_true-unreach-call_false-termination.c [2018-10-27 14:24:11,601 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0ad563983/0566b5d563724a5cbcd7d87b81e4faa4/FLAG9111e9967 [2018-10-27 14:24:11,622 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0ad563983/0566b5d563724a5cbcd7d87b81e4faa4 [2018-10-27 14:24:11,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:24:11,639 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:24:11,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:24:11,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:24:11,646 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:24:11,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:24:11" (1/1) ... [2018-10-27 14:24:11,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79efdec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:11, skipping insertion in model container [2018-10-27 14:24:11,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:24:11" (1/1) ... [2018-10-27 14:24:11,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:24:11,739 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:24:12,249 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:24:12,254 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:24:12,383 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:24:12,404 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:24:12,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12 WrapperNode [2018-10-27 14:24:12,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:24:12,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:24:12,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:24:12,406 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:24:12,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:24:12,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:24:12,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:24:12,640 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:24:12,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (1/1) ... [2018-10-27 14:24:12,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:24:12,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:24:12,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:24:12,763 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:24:12,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (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 14:24:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:24:12,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:24:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:24:12,846 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:24:12,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:24:12,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:24:12,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:24:12,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:24:16,411 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:24:16,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:24:16 BoogieIcfgContainer [2018-10-27 14:24:16,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:24:16,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:24:16,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:24:16,418 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:24:16,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:24:11" (1/3) ... [2018-10-27 14:24:16,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5197296a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:24:16, skipping insertion in model container [2018-10-27 14:24:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:24:12" (2/3) ... [2018-10-27 14:24:16,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5197296a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:24:16, skipping insertion in model container [2018-10-27 14:24:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:24:16" (3/3) ... [2018-10-27 14:24:16,424 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label17_true-unreach-call_false-termination.c [2018-10-27 14:24:16,436 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:24:16,446 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:24:16,465 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:24:16,513 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:24:16,513 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:24:16,513 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:24:16,514 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:24:16,514 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:24:16,514 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:24:16,514 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:24:16,514 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:24:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 14:24:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-27 14:24:16,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:16,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:24:16,562 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:16,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1535437935, now seen corresponding path program 1 times [2018-10-27 14:24:16,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:16,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:16,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:16,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:16,618 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:17,015 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:24:17,049 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 14:24:17,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:17,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 14:24:17,053 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:17,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:24:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:24:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:24:17,079 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 14:24:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:18,905 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-27 14:24:18,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:24:18,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2018-10-27 14:24:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:18,929 INFO L225 Difference]: With dead ends: 691 [2018-10-27 14:24:18,929 INFO L226 Difference]: Without dead ends: 434 [2018-10-27 14:24:18,938 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 14:24:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-27 14:24:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-27 14:24:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 14:24:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 755 transitions. [2018-10-27 14:24:19,025 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 755 transitions. Word has length 63 [2018-10-27 14:24:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:19,026 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 755 transitions. [2018-10-27 14:24:19,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:24:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 755 transitions. [2018-10-27 14:24:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-27 14:24:19,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:19,036 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, 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] [2018-10-27 14:24:19,037 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:19,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1025550080, now seen corresponding path program 1 times [2018-10-27 14:24:19,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:19,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:19,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:19,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:19,040 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:19,361 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:19,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:24:19,361 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:19,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:24:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:24:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:24:19,365 INFO L87 Difference]: Start difference. First operand 434 states and 755 transitions. Second operand 6 states. [2018-10-27 14:24:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:21,928 INFO L93 Difference]: Finished difference Result 1254 states and 2256 transitions. [2018-10-27 14:24:21,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:24:21,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-10-27 14:24:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:21,943 INFO L225 Difference]: With dead ends: 1254 [2018-10-27 14:24:21,944 INFO L226 Difference]: Without dead ends: 826 [2018-10-27 14:24:21,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:24:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2018-10-27 14:24:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 812. [2018-10-27 14:24:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-10-27 14:24:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1377 transitions. [2018-10-27 14:24:22,019 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1377 transitions. Word has length 143 [2018-10-27 14:24:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:22,020 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1377 transitions. [2018-10-27 14:24:22,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:24:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1377 transitions. [2018-10-27 14:24:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-27 14:24:22,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:22,027 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, 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 14:24:22,028 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:22,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:22,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1017512645, now seen corresponding path program 1 times [2018-10-27 14:24:22,029 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:22,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:22,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:22,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:22,031 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:22,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:22,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:24:22,345 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:22,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:24:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:24:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:24:22,348 INFO L87 Difference]: Start difference. First operand 812 states and 1377 transitions. Second operand 4 states. [2018-10-27 14:24:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:25,743 INFO L93 Difference]: Finished difference Result 1988 states and 3388 transitions. [2018-10-27 14:24:25,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:24:25,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2018-10-27 14:24:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:25,765 INFO L225 Difference]: With dead ends: 1988 [2018-10-27 14:24:25,765 INFO L226 Difference]: Without dead ends: 1182 [2018-10-27 14:24:25,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:24:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-10-27 14:24:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2018-10-27 14:24:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2018-10-27 14:24:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1751 transitions. [2018-10-27 14:24:25,823 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1751 transitions. Word has length 176 [2018-10-27 14:24:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:25,824 INFO L481 AbstractCegarLoop]: Abstraction has 1182 states and 1751 transitions. [2018-10-27 14:24:25,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:24:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1751 transitions. [2018-10-27 14:24:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-27 14:24:25,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:25,831 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:24:25,831 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:25,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash -234886452, now seen corresponding path program 1 times [2018-10-27 14:24:25,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:25,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:25,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:25,833 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:26,428 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 14:24:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:24:26,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:24:26,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:24:26,975 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:26,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:24:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:24:26,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:24:26,977 INFO L87 Difference]: Start difference. First operand 1182 states and 1751 transitions. Second operand 6 states. [2018-10-27 14:24:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:24:33,530 INFO L93 Difference]: Finished difference Result 3828 states and 5913 transitions. [2018-10-27 14:24:33,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 14:24:33,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-10-27 14:24:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:24:33,554 INFO L225 Difference]: With dead ends: 3828 [2018-10-27 14:24:33,555 INFO L226 Difference]: Without dead ends: 2652 [2018-10-27 14:24:33,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 14:24:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2018-10-27 14:24:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2568. [2018-10-27 14:24:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2018-10-27 14:24:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3547 transitions. [2018-10-27 14:24:33,676 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3547 transitions. Word has length 229 [2018-10-27 14:24:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:24:33,677 INFO L481 AbstractCegarLoop]: Abstraction has 2568 states and 3547 transitions. [2018-10-27 14:24:33,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:24:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3547 transitions. [2018-10-27 14:24:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-10-27 14:24:33,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:24:33,695 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:24:33,696 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:24:33,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 96321352, now seen corresponding path program 1 times [2018-10-27 14:24:33,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:24:33,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:33,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:24:33,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:24:33,698 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:24:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:24:34,304 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 14:24:34,691 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 14:24:34,964 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-27 14:24:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 256 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:24:35,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:24:35,503 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:24:35,504 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 414 with the following transitions: [2018-10-27 14:24:35,507 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [405], [407], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [822], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 14:24:35,577 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:24:35,577 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:24:36,550 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:24:56,696 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:24:56,698 INFO L272 AbstractInterpreter]: Visited 161 different actions 315 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 14:24:56,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:24:56,742 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:25:05,987 INFO L227 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 77.78% of their original sizes. [2018-10-27 14:25:05,988 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:25:07,380 INFO L415 sIntCurrentIteration]: We unified 412 AI predicates to 412 [2018-10-27 14:25:07,381 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:25:07,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:25:07,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-10-27 14:25:07,382 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:25:07,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-27 14:25:07,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-27 14:25:07,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2018-10-27 14:25:07,384 INFO L87 Difference]: Start difference. First operand 2568 states and 3547 transitions. Second operand 24 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown