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_label05_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:23:08,432 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:23:08,434 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:23:08,446 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:23:08,447 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:23:08,448 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:23:08,449 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:23:08,451 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:23:08,453 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:23:08,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:23:08,454 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:23:08,455 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:23:08,456 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:23:08,457 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:23:08,458 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:23:08,459 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:23:08,460 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:23:08,462 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:23:08,464 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:23:08,465 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:23:08,466 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:23:08,468 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:23:08,470 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:23:08,471 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:23:08,471 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:23:08,472 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:23:08,473 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:23:08,474 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:23:08,475 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:23:08,476 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:23:08,476 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:23:08,477 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 14:23:08,480 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 14:23:08,505 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:23:08,509 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:23:08,510 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:23:08,510 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:23:08,510 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:23:08,510 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:23:08,514 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:23:08,514 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:23:08,514 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:23:08,514 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:23:08,514 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:23:08,515 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:23:08,515 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:23:08,515 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:23:08,517 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:23:08,517 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:23:08,517 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:23:08,517 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:23:08,518 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:23:08,518 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:23:08,518 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:23:08,518 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:23:08,518 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:23:08,519 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:23:08,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:23:08,520 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:23:08,520 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:23:08,520 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:23:08,521 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:23:08,521 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:23:08,521 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:23:08,521 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:23:08,521 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:23:08,522 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:23:08,586 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:23:08,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:23:08,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:23:08,610 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:23:08,611 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:23:08,612 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05_true-unreach-call_false-termination.c [2018-10-27 14:23:08,682 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9edf2c6c4/93a319cde51d40329b698a227073572f/FLAG4544f66a3 [2018-10-27 14:23:09,332 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:23:09,334 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label05_true-unreach-call_false-termination.c [2018-10-27 14:23:09,355 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9edf2c6c4/93a319cde51d40329b698a227073572f/FLAG4544f66a3 [2018-10-27 14:23:09,377 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9edf2c6c4/93a319cde51d40329b698a227073572f [2018-10-27 14:23:09,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:23:09,392 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:23:09,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:23:09,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:23:09,398 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:23:09,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:23:09" (1/1) ... [2018-10-27 14:23:09,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46dcfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:09, skipping insertion in model container [2018-10-27 14:23:09,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:23:09" (1/1) ... [2018-10-27 14:23:09,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:23:09,475 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:23:09,967 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:23:09,974 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:23:10,124 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:23:10,144 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:23:10,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10 WrapperNode [2018-10-27 14:23:10,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:23:10,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:23:10,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:23:10,147 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:23:10,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:23:10,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:23:10,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:23:10,379 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:23:10,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (1/1) ... [2018-10-27 14:23:10,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:23:10,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:23:10,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:23:10,470 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:23:10,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (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 14:23:10,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:23:10,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:23:10,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:23:10,569 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:23:10,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:23:10,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:23:10,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:23:10,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:23:14,678 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:23:14,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:23:14 BoogieIcfgContainer [2018-10-27 14:23:14,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:23:14,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:23:14,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:23:14,688 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:23:14,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:23:09" (1/3) ... [2018-10-27 14:23:14,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e7bc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:23:14, skipping insertion in model container [2018-10-27 14:23:14,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:23:10" (2/3) ... [2018-10-27 14:23:14,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e7bc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:23:14, skipping insertion in model container [2018-10-27 14:23:14,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:23:14" (3/3) ... [2018-10-27 14:23:14,693 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label05_true-unreach-call_false-termination.c [2018-10-27 14:23:14,704 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:23:14,719 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:23:14,738 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:23:14,795 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:23:14,795 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:23:14,795 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:23:14,796 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:23:14,796 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:23:14,796 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:23:14,796 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:23:14,796 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:23:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 14:23:14,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-27 14:23:14,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:14,843 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, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:23:14,846 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:14,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash 638958820, now seen corresponding path program 1 times [2018-10-27 14:23:14,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:14,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:14,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:14,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:14,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:15,372 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 14:23:15,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:15,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 14:23:15,376 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:15,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:23:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:23:15,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 14:23:15,403 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 14:23:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:17,335 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-27 14:23:17,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:23:17,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2018-10-27 14:23:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:17,358 INFO L225 Difference]: With dead ends: 691 [2018-10-27 14:23:17,358 INFO L226 Difference]: Without dead ends: 434 [2018-10-27 14:23:17,366 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 14:23:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-27 14:23:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-27 14:23:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 14:23:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-10-27 14:23:17,447 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 70 [2018-10-27 14:23:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:17,447 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-10-27 14:23:17,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:23:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-10-27 14:23:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-27 14:23:17,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:17,457 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:23:17,457 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:17,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:17,458 INFO L82 PathProgramCache]: Analyzing trace with hash 781618536, now seen corresponding path program 1 times [2018-10-27 14:23:17,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:17,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:17,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:17,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:17,460 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:23:17,775 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:17,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:23:17,776 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:17,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:23:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:23:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:23:17,779 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-10-27 14:23:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:21,830 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-10-27 14:23:21,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:23:21,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2018-10-27 14:23:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:21,842 INFO L225 Difference]: With dead ends: 1588 [2018-10-27 14:23:21,842 INFO L226 Difference]: Without dead ends: 1160 [2018-10-27 14:23:21,846 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 14:23:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-10-27 14:23:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-10-27 14:23:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-10-27 14:23:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-10-27 14:23:21,917 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 140 [2018-10-27 14:23:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-10-27 14:23:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:23:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-10-27 14:23:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-27 14:23:21,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:21,928 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:23:21,928 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:21,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash 386881263, now seen corresponding path program 1 times [2018-10-27 14:23:21,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:21,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:21,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:21,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:21,931 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:23:22,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:22,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:23:22,154 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:22,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:23:22,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:23:22,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:23:22,156 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-10-27 14:23:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:24,797 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-10-27 14:23:24,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:23:24,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2018-10-27 14:23:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:24,813 INFO L225 Difference]: With dead ends: 2716 [2018-10-27 14:23:24,813 INFO L226 Difference]: Without dead ends: 1569 [2018-10-27 14:23:24,818 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 14:23:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-10-27 14:23:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-10-27 14:23:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-10-27 14:23:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-10-27 14:23:24,874 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 141 [2018-10-27 14:23:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:24,875 INFO L481 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-10-27 14:23:24,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:23:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-10-27 14:23:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-27 14:23:24,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:24,878 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 14:23:24,879 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:24,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1814928629, now seen corresponding path program 1 times [2018-10-27 14:23:24,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:24,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:24,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:24,881 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:23:25,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:25,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:23:25,101 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:25,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:23:25,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:23:25,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:23:25,102 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-10-27 14:23:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:27,523 INFO L93 Difference]: Finished difference Result 4906 states and 7504 transitions. [2018-10-27 14:23:27,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:23:27,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2018-10-27 14:23:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:27,545 INFO L225 Difference]: With dead ends: 4906 [2018-10-27 14:23:27,546 INFO L226 Difference]: Without dead ends: 3374 [2018-10-27 14:23:27,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 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 14:23:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2018-10-27 14:23:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3263. [2018-10-27 14:23:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3263 states. [2018-10-27 14:23:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4437 transitions. [2018-10-27 14:23:27,665 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4437 transitions. Word has length 143 [2018-10-27 14:23:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:27,666 INFO L481 AbstractCegarLoop]: Abstraction has 3263 states and 4437 transitions. [2018-10-27 14:23:27,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:23:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4437 transitions. [2018-10-27 14:23:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-27 14:23:27,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:27,675 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:23:27,676 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:27,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash -294094552, now seen corresponding path program 1 times [2018-10-27 14:23:27,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:27,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:27,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:27,678 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-27 14:23:27,973 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:23:27,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:23:27,974 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:27,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:23:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:23:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:23:27,976 INFO L87 Difference]: Start difference. First operand 3263 states and 4437 transitions. Second operand 4 states. [2018-10-27 14:23:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:23:31,333 INFO L93 Difference]: Finished difference Result 8771 states and 12434 transitions. [2018-10-27 14:23:31,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:23:31,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2018-10-27 14:23:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:23:31,371 INFO L225 Difference]: With dead ends: 8771 [2018-10-27 14:23:31,374 INFO L226 Difference]: Without dead ends: 5514 [2018-10-27 14:23:31,397 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 14:23:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2018-10-27 14:23:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 5512. [2018-10-27 14:23:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5512 states. [2018-10-27 14:23:31,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 7392 transitions. [2018-10-27 14:23:31,552 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 7392 transitions. Word has length 228 [2018-10-27 14:23:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:23:31,553 INFO L481 AbstractCegarLoop]: Abstraction has 5512 states and 7392 transitions. [2018-10-27 14:23:31,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:23:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 7392 transitions. [2018-10-27 14:23:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-10-27 14:23:31,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:23:31,584 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:23:31,584 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:23:31,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2115072535, now seen corresponding path program 1 times [2018-10-27 14:23:31,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:23:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:31,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:23:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:23:31,586 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:23:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:23:32,102 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 14:23:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:23:32,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:23:32,295 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:23:32,296 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 338 with the following transitions: [2018-10-27 14:23:32,299 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], [409], [417], [425], [433], [441], [449], [457], [461], [463], [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], [823], [827], [830], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 14:23:32,365 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:23:32,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:23:33,289 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:23:44,433 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:23:44,435 INFO L272 AbstractInterpreter]: Visited 159 different actions 159 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 14:23:44,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:23:44,479 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:23:54,725 INFO L227 lantSequenceWeakener]: Weakened 328 states. On average, predicates are now at 77.98% of their original sizes. [2018-10-27 14:23:54,725 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:23:55,194 INFO L415 sIntCurrentIteration]: We unified 336 AI predicates to 336 [2018-10-27 14:23:55,194 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:23:55,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:23:55,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-10-27 14:23:55,196 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:23:55,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 14:23:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 14:23:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:23:55,197 INFO L87 Difference]: Start difference. First operand 5512 states and 7392 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown