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_label07_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:23:27,598 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:23:27,600 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:23:27,612 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:23:27,612 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:23:27,614 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:23:27,615 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:23:27,617 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:23:27,618 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:23:27,619 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:23:27,620 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:23:27,620 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:23:27,621 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:23:27,622 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:23:27,623 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:23:27,624 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:23:27,625 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:23:27,627 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:23:27,629 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:23:27,630 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:23:27,632 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:23:27,633 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:23:27,635 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:23:27,636 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:23:27,636 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:23:27,637 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:23:27,638 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:23:27,639 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:23:27,640 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:23:27,641 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:23:27,641 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:23:27,642 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 14:23:27,644 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 14:23:27,660 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:23:27,660 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:23:27,661 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:23:27,662 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:23:27,662 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:23:27,662 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:23:27,662 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:23:27,662 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:23:27,663 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:23:27,663 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:23:27,663 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:23:27,663 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:23:27,664 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:23:27,664 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:23:27,664 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:23:27,664 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:23:27,664 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:23:27,665 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:23:27,665 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:23:27,665 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:23:27,665 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:23:27,665 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:23:27,666 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:23:27,666 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:23:27,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:23:27,666 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:23:27,666 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:23:27,667 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:23:27,667 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:23:27,667 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:23:27,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:23:27,667 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:23:27,668 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:23:27,668 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:23:27,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:23:27,722 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:23:27,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:23:27,726 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:23:27,727 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:23:27,727 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label07_true-unreach-call_false-termination.c [2018-10-27 14:23:27,791 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6e461ebff/2d7a1f3cc32349cfb0be05e5951c7320/FLAG5b6c818e3 [2018-10-27 14:23:28,362 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:23:28,363 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label07_true-unreach-call_false-termination.c [2018-10-27 14:23:28,382 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6e461ebff/2d7a1f3cc32349cfb0be05e5951c7320/FLAG5b6c818e3 [2018-10-27 14:23:28,397 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6e461ebff/2d7a1f3cc32349cfb0be05e5951c7320 [2018-10-27 14:23:28,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:23:28,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:23:28,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:23:28,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:23:28,416 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:23:28,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:23:28" (1/1) ... [2018-10-27 14:23:28,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a22afd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:28, skipping insertion in model container [2018-10-27 14:23:28,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:23:28" (1/1) ... [2018-10-27 14:23:28,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:23:28,508 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:23:28,994 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:23:28,999 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:23:29,188 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:23:29,206 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:23:29,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29 WrapperNode [2018-10-27 14:23:29,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:23:29,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:23:29,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:23:29,208 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:23:29,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:23:29,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:23:29,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:23:29,447 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:23:29,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (1/1) ... [2018-10-27 14:23:29,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:23:29,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:23:29,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:23:29,568 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:23:29,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (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 14:23:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:23:29,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:23:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:23:29,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:23:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:23:29,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:23:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:23:29,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:23:33,489 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:23:33,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:23:33 BoogieIcfgContainer [2018-10-27 14:23:33,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:23:33,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:23:33,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:23:33,496 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:23:33,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:23:28" (1/3) ... [2018-10-27 14:23:33,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d1d995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:23:33, skipping insertion in model container [2018-10-27 14:23:33,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:29" (2/3) ... [2018-10-27 14:23:33,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d1d995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:23:33, skipping insertion in model container [2018-10-27 14:23:33,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:23:33" (3/3) ... [2018-10-27 14:23:33,501 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label07_true-unreach-call_false-termination.c [2018-10-27 14:23:33,509 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:23:33,518 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:23:33,536 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:23:33,576 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:23:33,576 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:23:33,577 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:23:33,577 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:23:33,577 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:23:33,577 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:23:33,578 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:23:33,578 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:23:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 14:23:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-27 14:23:33,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:33,616 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] [2018-10-27 14:23:33,619 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:33,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash -989245532, now seen corresponding path program 1 times [2018-10-27 14:23:33,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:33,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:33,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:33,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:34,174 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 14:23:34,177 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:34,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:23:34,177 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:34,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:23:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:23:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:23:34,206 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-10-27 14:23:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:37,658 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-10-27 14:23:37,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:23:37,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-10-27 14:23:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:37,686 INFO L225 Difference]: With dead ends: 894 [2018-10-27 14:23:37,686 INFO L226 Difference]: Without dead ends: 633 [2018-10-27 14:23:37,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:23:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-10-27 14:23:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-10-27 14:23:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 14:23:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-10-27 14:23:37,788 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 54 [2018-10-27 14:23:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:37,789 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-10-27 14:23:37,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:23:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-10-27 14:23:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-27 14:23:37,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:37,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:37,805 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:37,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1614354860, now seen corresponding path program 1 times [2018-10-27 14:23:37,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:37,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:37,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:37,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:37,810 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:23:38,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:38,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:23:38,156 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:38,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:23:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:23:38,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:23:38,159 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-10-27 14:23:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:41,077 INFO L93 Difference]: Finished difference Result 1594 states and 2533 transitions. [2018-10-27 14:23:41,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:23:41,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2018-10-27 14:23:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:41,089 INFO L225 Difference]: With dead ends: 1594 [2018-10-27 14:23:41,089 INFO L226 Difference]: Without dead ends: 780 [2018-10-27 14:23:41,096 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 14:23:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-10-27 14:23:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-10-27 14:23:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-10-27 14:23:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1152 transitions. [2018-10-27 14:23:41,170 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1152 transitions. Word has length 138 [2018-10-27 14:23:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:41,170 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 1152 transitions. [2018-10-27 14:23:41,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:23:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1152 transitions. [2018-10-27 14:23:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-27 14:23:41,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:41,190 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:23:41,190 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:41,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1391925776, now seen corresponding path program 1 times [2018-10-27 14:23:41,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:41,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:41,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:41,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:41,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-27 14:23:41,529 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:41,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:23:41,532 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:41,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:23:41,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:23:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:23:41,534 INFO L87 Difference]: Start difference. First operand 780 states and 1152 transitions. Second operand 4 states. [2018-10-27 14:23:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:46,888 INFO L93 Difference]: Finished difference Result 3018 states and 4610 transitions. [2018-10-27 14:23:46,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:23:46,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 224 [2018-10-27 14:23:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:46,908 INFO L225 Difference]: With dead ends: 3018 [2018-10-27 14:23:46,909 INFO L226 Difference]: Without dead ends: 2244 [2018-10-27 14:23:46,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:23:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2018-10-27 14:23:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2018-10-27 14:23:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2018-10-27 14:23:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3149 transitions. [2018-10-27 14:23:47,005 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3149 transitions. Word has length 224 [2018-10-27 14:23:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:47,006 INFO L481 AbstractCegarLoop]: Abstraction has 2244 states and 3149 transitions. [2018-10-27 14:23:47,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:23:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3149 transitions. [2018-10-27 14:23:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-27 14:23:47,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:47,023 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-10-27 14:23:47,023 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:47,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1136291269, now seen corresponding path program 1 times [2018-10-27 14:23:47,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:47,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:47,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:47,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:47,025 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:47,571 WARN L179 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 14:23:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 94 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:23:48,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:23:48,028 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:23:48,029 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 320 with the following transitions: [2018-10-27 14:23:48,031 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], [333], [335], [338], [346], [354], [362], [370], [378], [386], [394], [402], [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], [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 14:23:48,086 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:23:48,087 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:23:49,121 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:23:58,798 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:23:58,800 INFO L272 AbstractInterpreter]: Visited 157 different actions 157 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 14:23:58,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:58,832 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:24:08,815 INFO L227 lantSequenceWeakener]: Weakened 310 states. On average, predicates are now at 77.79% of their original sizes. [2018-10-27 14:24:08,816 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:24:09,303 INFO L415 sIntCurrentIteration]: We unified 318 AI predicates to 318 [2018-10-27 14:24:09,303 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:24:09,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:24:09,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-10-27 14:24:09,305 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:24:09,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 14:24:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 14:24:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:24:09,307 INFO L87 Difference]: Start difference. First operand 2244 states and 3149 transitions. Second operand 8 states. [2018-10-27 14:25:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:25:53,680 INFO L93 Difference]: Finished difference Result 4667 states and 6526 transitions. [2018-10-27 14:25:53,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:25:53,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 319 [2018-10-27 14:25:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:25:53,698 INFO L225 Difference]: With dead ends: 4667 [2018-10-27 14:25:53,698 INFO L226 Difference]: Without dead ends: 2429 [2018-10-27 14:25:53,713 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 14:25:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2018-10-27 14:25:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2018-10-27 14:25:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2427 states. [2018-10-27 14:25:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3340 transitions. [2018-10-27 14:25:53,785 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3340 transitions. Word has length 319 [2018-10-27 14:25:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:25:53,786 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 3340 transitions. [2018-10-27 14:25:53,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 14:25:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3340 transitions. [2018-10-27 14:25:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-10-27 14:25:53,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:25:53,805 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:25:53,806 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:25:53,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:25:53,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2012329804, now seen corresponding path program 1 times [2018-10-27 14:25:53,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:25:53,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:25:53,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:25:53,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:25:53,808 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:25:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:25:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 229 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:25:54,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:25:54,761 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:25:54,762 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 405 with the following transitions: [2018-10-27 14:25:54,762 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], [333], [335], [338], [346], [354], [362], [370], [378], [386], [394], [402], [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 14:25:54,770 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:25:54,771 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:25:55,067 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:26:12,528 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:26:12,529 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 14:26:12,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:26:12,566 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:26:21,941 INFO L227 lantSequenceWeakener]: Weakened 184 states. On average, predicates are now at 77.67% of their original sizes. [2018-10-27 14:26:21,942 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:26:23,124 INFO L415 sIntCurrentIteration]: We unified 403 AI predicates to 403 [2018-10-27 14:26:23,124 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:26:23,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:26:23,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-10-27 14:26:23,125 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:26:23,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-27 14:26:23,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-27 14:26:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-10-27 14:26:23,128 INFO L87 Difference]: Start difference. First operand 2427 states and 3340 transitions. Second operand 23 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown