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/Problem18_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 15:12:52,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 15:12:52,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 15:12:52,519 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 15:12:52,520 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 15:12:52,521 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 15:12:52,522 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 15:12:52,524 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 15:12:52,525 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 15:12:52,526 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 15:12:52,527 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 15:12:52,527 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 15:12:52,528 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 15:12:52,529 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 15:12:52,530 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 15:12:52,531 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 15:12:52,532 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 15:12:52,534 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 15:12:52,536 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 15:12:52,537 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 15:12:52,538 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 15:12:52,540 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 15:12:52,542 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 15:12:52,542 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 15:12:52,542 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 15:12:52,545 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 15:12:52,546 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 15:12:52,547 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 15:12:52,548 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 15:12:52,549 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 15:12:52,549 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 15:12:52,550 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 15:12:52,551 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 15:12:52,551 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 15:12:52,554 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 15:12:52,556 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 15:12:52,556 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 15:12:52,587 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 15:12:52,587 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 15:12:52,589 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 15:12:52,589 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 15:12:52,589 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 15:12:52,590 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 15:12:52,590 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 15:12:52,590 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 15:12:52,590 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 15:12:52,590 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 15:12:52,590 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 15:12:52,591 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 15:12:52,592 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 15:12:52,592 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 15:12:52,592 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 15:12:52,592 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 15:12:52,592 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 15:12:52,593 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 15:12:52,594 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 15:12:52,595 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 15:12:52,595 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 15:12:52,595 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 15:12:52,595 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 15:12:52,595 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 15:12:52,596 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 15:12:52,596 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 15:12:52,596 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 15:12:52,596 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 15:12:52,597 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 15:12:52,597 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 15:12:52,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 15:12:52,597 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 15:12:52,597 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 15:12:52,598 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 15:12:52,651 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 15:12:52,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 15:12:52,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 15:12:52,671 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 15:12:52,671 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 15:12:52,672 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label54_true-unreach-call.c [2018-10-27 15:12:52,729 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/870faa11c/b1a7a129ba4d4cdba1050c4f5aaecefd/FLAGccba39f39 [2018-10-27 15:12:53,490 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 15:12:53,491 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label54_true-unreach-call.c [2018-10-27 15:12:53,519 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/870faa11c/b1a7a129ba4d4cdba1050c4f5aaecefd/FLAGccba39f39 [2018-10-27 15:12:53,537 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/870faa11c/b1a7a129ba4d4cdba1050c4f5aaecefd [2018-10-27 15:12:53,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 15:12:53,554 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 15:12:53,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 15:12:53,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 15:12:53,559 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 15:12:53,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:12:53" (1/1) ... [2018-10-27 15:12:53,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d607cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:53, skipping insertion in model container [2018-10-27 15:12:53,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:12:53" (1/1) ... [2018-10-27 15:12:53,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 15:12:53,727 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 15:12:54,885 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:12:54,890 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 15:12:55,321 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:12:55,349 INFO L193 MainTranslator]: Completed translation [2018-10-27 15:12:55,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55 WrapperNode [2018-10-27 15:12:55,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 15:12:55,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 15:12:55,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 15:12:55,352 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 15:12:55,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 15:12:55,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 15:12:55,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 15:12:55,763 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 15:12:55,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (1/1) ... [2018-10-27 15:12:55,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 15:12:55,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 15:12:55,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 15:12:55,986 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 15:12:55,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (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 15:12:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 15:12:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 15:12:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 15:12:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 15:12:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 15:12:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 15:12:56,060 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 15:12:56,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 15:12:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 15:12:56,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 15:12:56,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 15:12:56,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 15:13:03,996 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 15:13:03,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:13:03 BoogieIcfgContainer [2018-10-27 15:13:03,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 15:13:03,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 15:13:04,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 15:13:04,009 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 15:13:04,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:12:53" (1/3) ... [2018-10-27 15:13:04,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b40e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:13:04, skipping insertion in model container [2018-10-27 15:13:04,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:12:55" (2/3) ... [2018-10-27 15:13:04,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b40e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:13:04, skipping insertion in model container [2018-10-27 15:13:04,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:13:03" (3/3) ... [2018-10-27 15:13:04,013 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label54_true-unreach-call.c [2018-10-27 15:13:04,023 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 15:13:04,032 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 15:13:04,050 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 15:13:04,101 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 15:13:04,101 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 15:13:04,102 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 15:13:04,103 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 15:13:04,103 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 15:13:04,103 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 15:13:04,104 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 15:13:04,104 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 15:13:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-10-27 15:13:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-27 15:13:04,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:13:04,168 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] [2018-10-27 15:13:04,170 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:13:04,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:13:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash 925011759, now seen corresponding path program 1 times [2018-10-27 15:13:04,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:13:04,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:04,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:13:04,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:04,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:13:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:13:04,719 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 15:13:04,737 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 15:13:04,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:13:04,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 15:13:04,740 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:13:04,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 15:13:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 15:13:04,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:13:04,767 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-10-27 15:13:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:13:15,909 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-10-27 15:13:15,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:13:15,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-10-27 15:13:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:13:16,031 INFO L225 Difference]: With dead ends: 2974 [2018-10-27 15:13:16,032 INFO L226 Difference]: Without dead ends: 2193 [2018-10-27 15:13:16,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:13:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-10-27 15:13:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2018-10-27 15:13:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2193 states. [2018-10-27 15:13:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3677 transitions. [2018-10-27 15:13:16,211 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3677 transitions. Word has length 41 [2018-10-27 15:13:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:13:16,212 INFO L481 AbstractCegarLoop]: Abstraction has 2193 states and 3677 transitions. [2018-10-27 15:13:16,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 15:13:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3677 transitions. [2018-10-27 15:13:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-27 15:13:16,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:13:16,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:13:16,219 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:13:16,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:13:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash 833468768, now seen corresponding path program 1 times [2018-10-27 15:13:16,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:13:16,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:16,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:13:16,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:16,222 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:13:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:13:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:13:16,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:13:16,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 15:13:16,518 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:13:16,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 15:13:16,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 15:13:16,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 15:13:16,521 INFO L87 Difference]: Start difference. First operand 2193 states and 3677 transitions. Second operand 5 states. [2018-10-27 15:13:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:13:26,373 INFO L93 Difference]: Finished difference Result 6600 states and 11248 transitions. [2018-10-27 15:13:26,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 15:13:26,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2018-10-27 15:13:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:13:26,417 INFO L225 Difference]: With dead ends: 6600 [2018-10-27 15:13:26,417 INFO L226 Difference]: Without dead ends: 4413 [2018-10-27 15:13:26,428 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 15:13:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-10-27 15:13:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 4378. [2018-10-27 15:13:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4378 states. [2018-10-27 15:13:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6986 transitions. [2018-10-27 15:13:26,602 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6986 transitions. Word has length 111 [2018-10-27 15:13:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:13:26,603 INFO L481 AbstractCegarLoop]: Abstraction has 4378 states and 6986 transitions. [2018-10-27 15:13:26,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 15:13:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6986 transitions. [2018-10-27 15:13:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-27 15:13:26,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:13:26,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:13:26,618 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:13:26,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:13:26,619 INFO L82 PathProgramCache]: Analyzing trace with hash -545802471, now seen corresponding path program 1 times [2018-10-27 15:13:26,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:13:26,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:26,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:13:26,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:26,620 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:13:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:13:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:13:27,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:13:27,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 15:13:27,181 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:13:27,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 15:13:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 15:13:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 15:13:27,183 INFO L87 Difference]: Start difference. First operand 4378 states and 6986 transitions. Second operand 6 states. [2018-10-27 15:13:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:13:32,518 INFO L93 Difference]: Finished difference Result 11002 states and 17598 transitions. [2018-10-27 15:13:32,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 15:13:32,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2018-10-27 15:13:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:13:32,560 INFO L225 Difference]: With dead ends: 11002 [2018-10-27 15:13:32,561 INFO L226 Difference]: Without dead ends: 6630 [2018-10-27 15:13:32,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 15:13:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2018-10-27 15:13:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 6590. [2018-10-27 15:13:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2018-10-27 15:13:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 9022 transitions. [2018-10-27 15:13:32,781 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 9022 transitions. Word has length 138 [2018-10-27 15:13:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:13:32,782 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states and 9022 transitions. [2018-10-27 15:13:32,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 15:13:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 9022 transitions. [2018-10-27 15:13:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-27 15:13:32,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:13:32,787 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 15:13:32,788 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:13:32,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:13:32,788 INFO L82 PathProgramCache]: Analyzing trace with hash 736410430, now seen corresponding path program 1 times [2018-10-27 15:13:32,788 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:13:32,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:32,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:13:32,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:32,790 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:13:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:13:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 15:13:33,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:13:33,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 15:13:33,093 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:13:33,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 15:13:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 15:13:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 15:13:33,095 INFO L87 Difference]: Start difference. First operand 6590 states and 9022 transitions. Second operand 4 states. [2018-10-27 15:13:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:13:40,555 INFO L93 Difference]: Finished difference Result 25993 states and 36647 transitions. [2018-10-27 15:13:40,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 15:13:40,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2018-10-27 15:13:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:13:40,645 INFO L225 Difference]: With dead ends: 25993 [2018-10-27 15:13:40,646 INFO L226 Difference]: Without dead ends: 19409 [2018-10-27 15:13:40,694 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 15:13:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19409 states. [2018-10-27 15:13:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19409 to 19409. [2018-10-27 15:13:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19409 states. [2018-10-27 15:13:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19409 states to 19409 states and 25172 transitions. [2018-10-27 15:13:41,200 INFO L78 Accepts]: Start accepts. Automaton has 19409 states and 25172 transitions. Word has length 218 [2018-10-27 15:13:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:13:41,201 INFO L481 AbstractCegarLoop]: Abstraction has 19409 states and 25172 transitions. [2018-10-27 15:13:41,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 15:13:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 19409 states and 25172 transitions. [2018-10-27 15:13:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-10-27 15:13:41,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:13:41,243 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:13:41,243 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:13:41,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:13:41,244 INFO L82 PathProgramCache]: Analyzing trace with hash 228154957, now seen corresponding path program 1 times [2018-10-27 15:13:41,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:13:41,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:41,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:13:41,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:13:41,245 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:13:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:13:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 202 proven. 96 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-10-27 15:13:42,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:13:42,220 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:13:42,221 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-10-27 15:13:42,223 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1851], [1853], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2224], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2328], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2672], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-10-27 15:13:42,298 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:13:42,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:13:43,122 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 15:13:43,124 INFO L272 AbstractInterpreter]: Visited 215 different actions 215 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 15:13:43,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:13:43,169 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 15:13:44,109 INFO L227 lantSequenceWeakener]: Weakened 458 states. On average, predicates are now at 77.54% of their original sizes. [2018-10-27 15:13:44,109 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 15:13:44,497 INFO L415 sIntCurrentIteration]: We unified 469 AI predicates to 469 [2018-10-27 15:13:44,497 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 15:13:44,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 15:13:44,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-27 15:13:44,499 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:13:44,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 15:13:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 15:13:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 15:13:44,500 INFO L87 Difference]: Start difference. First operand 19409 states and 25172 transitions. Second operand 7 states. [2018-10-27 15:13:51,289 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown