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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 01:47:50,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 01:47:50,614 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 01:47:50,627 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 01:47:50,628 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 01:47:50,629 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 01:47:50,630 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 01:47:50,632 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 01:47:50,634 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 01:47:50,634 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 01:47:50,635 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 01:47:50,636 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 01:47:50,636 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 01:47:50,638 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 01:47:50,641 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 01:47:50,641 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 01:47:50,642 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 01:47:50,645 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 01:47:50,652 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 01:47:50,657 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 01:47:50,658 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 01:47:50,659 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 01:47:50,665 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 01:47:50,673 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-25 01:47:50,690 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 01:47:50,691 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 01:47:50,692 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 01:47:50,692 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 01:47:50,692 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 01:47:50,692 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 01:47:50,692 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 01:47:50,693 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 01:47:50,693 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 01:47:50,693 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 01:47:50,693 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 01:47:50,693 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 01:47:50,694 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 01:47:50,694 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 01:47:50,694 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 01:47:50,695 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 01:47:50,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 01:47:50,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 01:47:50,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 01:47:50,695 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 01:47:50,695 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 01:47:50,696 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 01:47:50,696 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 01:47:50,696 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 01:47:50,696 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 01:47:50,696 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 01:47:50,697 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:47:50,697 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 01:47:50,697 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 01:47:50,697 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 01:47:50,697 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 01:47:50,698 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 01:47:50,698 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 01:47:50,698 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 01:47:50,698 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 01:47:50,698 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 01:47:50,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 01:47:50,766 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 01:47:50,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 01:47:50,772 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 01:47:50,772 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 01:47:50,773 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c [2018-10-25 01:47:50,838 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e7ee0e486/6a9fa6693ba847af814ac3678fe34f28/FLAGf99a1f7e2 [2018-10-25 01:47:51,540 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 01:47:51,541 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c [2018-10-25 01:47:51,569 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e7ee0e486/6a9fa6693ba847af814ac3678fe34f28/FLAGf99a1f7e2 [2018-10-25 01:47:51,589 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e7ee0e486/6a9fa6693ba847af814ac3678fe34f28 [2018-10-25 01:47:51,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 01:47:51,604 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 01:47:51,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 01:47:51,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 01:47:51,612 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 01:47:51,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:47:51" (1/1) ... [2018-10-25 01:47:51,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c59344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:51, skipping insertion in model container [2018-10-25 01:47:51,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:47:51" (1/1) ... [2018-10-25 01:47:51,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 01:47:51,716 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 01:47:52,428 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:47:52,432 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 01:47:52,724 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:47:52,745 INFO L193 MainTranslator]: Completed translation [2018-10-25 01:47:52,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52 WrapperNode [2018-10-25 01:47:52,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 01:47:52,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 01:47:52,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 01:47:52,747 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 01:47:52,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:52,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 01:47:53,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 01:47:53,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 01:47:53,109 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 01:47:53,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (1/1) ... [2018-10-25 01:47:53,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 01:47:53,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 01:47:53,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 01:47:53,350 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 01:47:53,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (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 [2018-10-25 01:47:53,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 01:47:53,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 01:47:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 01:47:53,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 01:47:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 01:47:53,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 01:47:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 01:47:53,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 01:47:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 01:47:53,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 01:48:00,658 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 01:48:00,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:48:00 BoogieIcfgContainer [2018-10-25 01:48:00,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 01:48:00,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 01:48:00,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 01:48:00,666 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 01:48:00,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 01:47:51" (1/3) ... [2018-10-25 01:48:00,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b35b6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:48:00, skipping insertion in model container [2018-10-25 01:48:00,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:47:52" (2/3) ... [2018-10-25 01:48:00,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b35b6f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:48:00, skipping insertion in model container [2018-10-25 01:48:00,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:48:00" (3/3) ... [2018-10-25 01:48:00,671 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label17_true-unreach-call.c [2018-10-25 01:48:00,680 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 01:48:00,688 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 01:48:00,706 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 01:48:00,747 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 01:48:00,748 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 01:48:00,748 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 01:48:00,748 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 01:48:00,748 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 01:48:00,748 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 01:48:00,748 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 01:48:00,749 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 01:48:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-10-25 01:48:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-25 01:48:00,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:48:00,792 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] [2018-10-25 01:48:00,796 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:48:00,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:48:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash -466459612, now seen corresponding path program 1 times [2018-10-25 01:48:00,804 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:48:00,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:48:00,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:48:00,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:48:00,860 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:48:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:48:01,355 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-25 01:48:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:48:01,436 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:48:01,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:48:01,436 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:48:01,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:48:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:48:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:48:01,461 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-10-25 01:48:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:48:13,798 INFO L93 Difference]: Finished difference Result 1514 states and 2777 transitions. [2018-10-25 01:48:13,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:48:13,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2018-10-25 01:48:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:48:13,830 INFO L225 Difference]: With dead ends: 1514 [2018-10-25 01:48:13,831 INFO L226 Difference]: Without dead ends: 1070 [2018-10-25 01:48:13,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:48:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-10-25 01:48:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1068. [2018-10-25 01:48:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-10-25 01:48:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1675 transitions. [2018-10-25 01:48:14,002 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1675 transitions. Word has length 70 [2018-10-25 01:48:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:48:14,003 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1675 transitions. [2018-10-25 01:48:14,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:48:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1675 transitions. [2018-10-25 01:48:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-25 01:48:14,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:48:14,020 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] [2018-10-25 01:48:14,020 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:48:14,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:48:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash 608103471, now seen corresponding path program 1 times [2018-10-25 01:48:14,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:48:14,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:48:14,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:48:14,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:48:14,024 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:48:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:48:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:48:14,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:48:14,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:48:14,350 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:48:14,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:48:14,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:48:14,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:48:14,353 INFO L87 Difference]: Start difference. First operand 1068 states and 1675 transitions. Second operand 4 states. [2018-10-25 01:48:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:48:21,354 INFO L93 Difference]: Finished difference Result 3989 states and 6445 transitions. [2018-10-25 01:48:21,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:48:21,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2018-10-25 01:48:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:48:21,388 INFO L225 Difference]: With dead ends: 3989 [2018-10-25 01:48:21,388 INFO L226 Difference]: Without dead ends: 2927 [2018-10-25 01:48:21,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:48:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2018-10-25 01:48:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2925. [2018-10-25 01:48:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-10-25 01:48:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4174 transitions. [2018-10-25 01:48:21,518 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4174 transitions. Word has length 140 [2018-10-25 01:48:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:48:21,519 INFO L481 AbstractCegarLoop]: Abstraction has 2925 states and 4174 transitions. [2018-10-25 01:48:21,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:48:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4174 transitions. [2018-10-25 01:48:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-25 01:48:21,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:48:21,528 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:48:21,528 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:48:21,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:48:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1294046763, now seen corresponding path program 1 times [2018-10-25 01:48:21,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:48:21,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:48:21,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:48:21,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:48:21,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:48:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:48:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-25 01:48:22,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:48:22,428 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:48:22,429 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2018-10-25 01:48:22,431 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:48:22,478 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:48:22,479 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:48:23,741 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 01:48:23,743 INFO L272 AbstractInterpreter]: Visited 104 different actions 299 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-25 01:48:23,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:48:23,791 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 01:48:24,847 INFO L232 lantSequenceWeakener]: Weakened 247 states. On average, predicates are now at 78.73% of their original sizes. [2018-10-25 01:48:24,848 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 01:48:26,898 INFO L413 sIntCurrentIteration]: We have 249 unified AI predicates [2018-10-25 01:48:26,899 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 01:48:26,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:48:26,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-10-25 01:48:26,900 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:48:26,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 01:48:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 01:48:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-25 01:48:26,902 INFO L87 Difference]: Start difference. First operand 2925 states and 4174 transitions. Second operand 9 states. [2018-10-25 01:49:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:49:19,751 INFO L93 Difference]: Finished difference Result 6786 states and 9432 transitions. [2018-10-25 01:49:19,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-25 01:49:19,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 250 [2018-10-25 01:49:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:49:19,773 INFO L225 Difference]: With dead ends: 6786 [2018-10-25 01:49:19,773 INFO L226 Difference]: Without dead ends: 3867 [2018-10-25 01:49:19,786 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 255 GetRequests, 184 SyntacticMatches, 58 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-10-25 01:49:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2018-10-25 01:49:19,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3864. [2018-10-25 01:49:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3864 states. [2018-10-25 01:49:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 5171 transitions. [2018-10-25 01:49:19,882 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 5171 transitions. Word has length 250 [2018-10-25 01:49:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:49:19,883 INFO L481 AbstractCegarLoop]: Abstraction has 3864 states and 5171 transitions. [2018-10-25 01:49:19,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 01:49:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 5171 transitions. [2018-10-25 01:49:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-10-25 01:49:19,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:49:19,898 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:49:19,898 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:49:19,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:49:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash -524817064, now seen corresponding path program 1 times [2018-10-25 01:49:19,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:49:19,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:49:19,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:49:19,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:49:19,900 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:49:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:49:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-25 01:49:20,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:49:20,517 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:49:20,517 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 451 with the following transitions: [2018-10-25 01:49:20,518 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [625], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:49:20,528 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:49:20,528 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:49:21,363 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:49:21,364 INFO L272 AbstractInterpreter]: Visited 211 different actions 831 times. Merged at 7 different actions 23 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-25 01:49:21,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:49:21,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:49:21,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:49:21,374 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:49:21,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:49:21,384 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:49:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:49:21,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:49:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-25 01:49:21,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:49:22,167 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-10-25 01:49:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-25 01:49:22,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:49:22,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-25 01:49:22,734 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:49:22,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 01:49:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 01:49:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-25 01:49:22,737 INFO L87 Difference]: Start difference. First operand 3864 states and 5171 transitions. Second operand 9 states. [2018-10-25 01:49:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:49:55,835 INFO L93 Difference]: Finished difference Result 16831 states and 25134 transitions. [2018-10-25 01:49:55,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-25 01:49:55,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 450 [2018-10-25 01:49:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:49:55,949 INFO L225 Difference]: With dead ends: 16831 [2018-10-25 01:49:55,949 INFO L226 Difference]: Without dead ends: 13281 [2018-10-25 01:49:56,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 991 GetRequests, 936 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=2398, Unknown=0, NotChecked=0, Total=2970 [2018-10-25 01:49:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2018-10-25 01:49:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 13032. [2018-10-25 01:49:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13032 states. [2018-10-25 01:49:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13032 states to 13032 states and 16041 transitions. [2018-10-25 01:49:56,480 INFO L78 Accepts]: Start accepts. Automaton has 13032 states and 16041 transitions. Word has length 450 [2018-10-25 01:49:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:49:56,481 INFO L481 AbstractCegarLoop]: Abstraction has 13032 states and 16041 transitions. [2018-10-25 01:49:56,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 01:49:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 13032 states and 16041 transitions. [2018-10-25 01:49:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-10-25 01:49:56,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:49:56,512 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:49:56,512 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:49:56,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:49:56,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1125948549, now seen corresponding path program 1 times [2018-10-25 01:49:56,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:49:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:49:56,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:49:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:49:56,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:49:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:49:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 191 proven. 4 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-10-25 01:49:57,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:49:57,386 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:49:57,386 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 500 with the following transitions: [2018-10-25 01:49:57,387 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:49:57,399 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:49:57,400 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:49:59,486 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:49:59,486 INFO L272 AbstractInterpreter]: Visited 285 different actions 850 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-25 01:49:59,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:49:59,525 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:49:59,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:49:59,526 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:49:59,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:49:59,538 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:49:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:49:59,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:49:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 191 proven. 4 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-10-25 01:49:59,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:50:00,220 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-25 01:50:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-10-25 01:50:01,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:50:01,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2018-10-25 01:50:01,234 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:50:01,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-25 01:50:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-25 01:50:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:50:01,236 INFO L87 Difference]: Start difference. First operand 13032 states and 16041 transitions. Second operand 5 states. [2018-10-25 01:50:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:50:04,803 INFO L93 Difference]: Finished difference Result 25945 states and 33549 transitions. [2018-10-25 01:50:04,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 01:50:04,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2018-10-25 01:50:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:50:04,913 INFO L225 Difference]: With dead ends: 25945 [2018-10-25 01:50:04,914 INFO L226 Difference]: Without dead ends: 14942 [2018-10-25 01:50:04,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 997 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-25 01:50:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14942 states. [2018-10-25 01:50:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14942 to 14886. [2018-10-25 01:50:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14886 states. [2018-10-25 01:50:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14886 states to 14886 states and 17636 transitions. [2018-10-25 01:50:05,383 INFO L78 Accepts]: Start accepts. Automaton has 14886 states and 17636 transitions. Word has length 499 [2018-10-25 01:50:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:50:05,384 INFO L481 AbstractCegarLoop]: Abstraction has 14886 states and 17636 transitions. [2018-10-25 01:50:05,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-25 01:50:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 14886 states and 17636 transitions. [2018-10-25 01:50:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2018-10-25 01:50:05,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:50:05,426 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:50:05,426 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:50:05,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash 419516890, now seen corresponding path program 1 times [2018-10-25 01:50:05,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:50:05,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:05,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:05,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:05,429 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:50:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 277 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-25 01:50:06,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:06,284 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:50:06,285 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 516 with the following transitions: [2018-10-25 01:50:06,285 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [625], [626], [630], [633], [636], [640], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:50:06,292 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:50:06,292 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:50:19,974 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:50:19,974 INFO L272 AbstractInterpreter]: Visited 287 different actions 1144 times. Merged at 8 different actions 33 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-25 01:50:20,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:20,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:50:20,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:20,009 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:50:20,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:20,023 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:50:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:20,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:50:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-10-25 01:50:20,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:50:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2018-10-25 01:50:20,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:50:20,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 7 [2018-10-25 01:50:20,484 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:50:20,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:50:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:50:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-25 01:50:20,485 INFO L87 Difference]: Start difference. First operand 14886 states and 17636 transitions. Second operand 3 states. [2018-10-25 01:50:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:50:24,818 INFO L93 Difference]: Finished difference Result 38954 states and 47837 transitions. [2018-10-25 01:50:24,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:50:24,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 515 [2018-10-25 01:50:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:50:24,917 INFO L225 Difference]: With dead ends: 38954 [2018-10-25 01:50:24,918 INFO L226 Difference]: Without dead ends: 24382 [2018-10-25 01:50:24,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-25 01:50:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24382 states. [2018-10-25 01:50:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24382 to 24034. [2018-10-25 01:50:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24034 states. [2018-10-25 01:50:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24034 states to 24034 states and 29169 transitions. [2018-10-25 01:50:25,520 INFO L78 Accepts]: Start accepts. Automaton has 24034 states and 29169 transitions. Word has length 515 [2018-10-25 01:50:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:50:25,522 INFO L481 AbstractCegarLoop]: Abstraction has 24034 states and 29169 transitions. [2018-10-25 01:50:25,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:50:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24034 states and 29169 transitions. [2018-10-25 01:50:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-10-25 01:50:25,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:50:25,567 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:50:25,568 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:50:25,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash -200635057, now seen corresponding path program 1 times [2018-10-25 01:50:25,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:50:25,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:25,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:25,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:25,570 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:50:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:26,050 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-25 01:50:26,214 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-10-25 01:50:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2018-10-25 01:50:26,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:50:26,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:50:26,317 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:50:26,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:50:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:50:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:50:26,319 INFO L87 Difference]: Start difference. First operand 24034 states and 29169 transitions. Second operand 4 states. [2018-10-25 01:50:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:50:31,612 INFO L93 Difference]: Finished difference Result 57204 states and 71587 transitions. [2018-10-25 01:50:31,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:50:31,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 521 [2018-10-25 01:50:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:50:31,735 INFO L225 Difference]: With dead ends: 57204 [2018-10-25 01:50:31,736 INFO L226 Difference]: Without dead ends: 35477 [2018-10-25 01:50:31,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:50:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35477 states. [2018-10-25 01:50:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35477 to 35451. [2018-10-25 01:50:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35451 states. [2018-10-25 01:50:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 41979 transitions. [2018-10-25 01:50:32,469 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 41979 transitions. Word has length 521 [2018-10-25 01:50:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:50:32,470 INFO L481 AbstractCegarLoop]: Abstraction has 35451 states and 41979 transitions. [2018-10-25 01:50:32,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:50:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 41979 transitions. [2018-10-25 01:50:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2018-10-25 01:50:32,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:50:32,519 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:50:32,519 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:50:32,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash -309560524, now seen corresponding path program 1 times [2018-10-25 01:50:32,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:50:32,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:32,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:32,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:32,521 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:50:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 292 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-25 01:50:33,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:33,094 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:50:33,095 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 530 with the following transitions: [2018-10-25 01:50:33,095 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [714], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:50:33,101 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:50:33,101 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:50:35,474 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:50:35,474 INFO L272 AbstractInterpreter]: Visited 285 different actions 1138 times. Merged at 8 different actions 33 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-25 01:50:35,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:35,483 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:50:35,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:35,483 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:50:35,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:35,493 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:50:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:35,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:50:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 391 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-25 01:50:36,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:50:36,389 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-25 01:50:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 292 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-25 01:50:37,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:50:37,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-25 01:50:37,037 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:50:37,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 01:50:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 01:50:37,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-25 01:50:37,039 INFO L87 Difference]: Start difference. First operand 35451 states and 41979 transitions. Second operand 9 states. [2018-10-25 01:50:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:50:46,847 INFO L93 Difference]: Finished difference Result 74087 states and 94146 transitions. [2018-10-25 01:50:46,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-25 01:50:46,848 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 529 [2018-10-25 01:50:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:50:47,051 INFO L225 Difference]: With dead ends: 74087 [2018-10-25 01:50:47,052 INFO L226 Difference]: Without dead ends: 40943 [2018-10-25 01:50:47,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1067 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2018-10-25 01:50:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40943 states. [2018-10-25 01:50:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40943 to 39836. [2018-10-25 01:50:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39836 states. [2018-10-25 01:50:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39836 states to 39836 states and 49053 transitions. [2018-10-25 01:50:48,231 INFO L78 Accepts]: Start accepts. Automaton has 39836 states and 49053 transitions. Word has length 529 [2018-10-25 01:50:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:50:48,233 INFO L481 AbstractCegarLoop]: Abstraction has 39836 states and 49053 transitions. [2018-10-25 01:50:48,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 01:50:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 39836 states and 49053 transitions. [2018-10-25 01:50:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2018-10-25 01:50:48,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:50:48,291 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 01:50:48,291 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:50:48,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1921062102, now seen corresponding path program 1 times [2018-10-25 01:50:48,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:50:48,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:48,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:48,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:48,293 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:50:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 560 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-25 01:50:49,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:49,207 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:50:49,208 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 578 with the following transitions: [2018-10-25 01:50:49,208 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [857], [860], [864], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:50:49,212 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:50:49,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:50:50,886 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:50:50,886 INFO L272 AbstractInterpreter]: Visited 214 different actions 1058 times. Merged at 9 different actions 43 times. Widened at 1 different actions 4 times. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-25 01:50:50,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:50,895 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:50:50,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:50,895 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:50:50,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:50,904 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:50:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:51,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:50:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2018-10-25 01:50:51,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:50:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2018-10-25 01:50:52,133 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:50:52,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-10-25 01:50:52,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:50:52,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:50:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:50:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:50:52,134 INFO L87 Difference]: Start difference. First operand 39836 states and 49053 transitions. Second operand 3 states. [2018-10-25 01:50:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:50:55,490 INFO L93 Difference]: Finished difference Result 77674 states and 96146 transitions. [2018-10-25 01:50:55,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:50:55,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 577 [2018-10-25 01:50:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:50:55,722 INFO L225 Difference]: With dead ends: 77674 [2018-10-25 01:50:55,723 INFO L226 Difference]: Without dead ends: 40145 [2018-10-25 01:50:55,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1159 GetRequests, 1153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:50:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40145 states. [2018-10-25 01:50:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40145 to 39832. [2018-10-25 01:50:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39832 states. [2018-10-25 01:50:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39832 states to 39832 states and 49023 transitions. [2018-10-25 01:50:57,017 INFO L78 Accepts]: Start accepts. Automaton has 39832 states and 49023 transitions. Word has length 577 [2018-10-25 01:50:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:50:57,018 INFO L481 AbstractCegarLoop]: Abstraction has 39832 states and 49023 transitions. [2018-10-25 01:50:57,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:50:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39832 states and 49023 transitions. [2018-10-25 01:50:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2018-10-25 01:50:57,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:50:57,095 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 01:50:57,095 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:50:57,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:50:57,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1864949519, now seen corresponding path program 1 times [2018-10-25 01:50:57,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:50:57,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:57,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:50:57,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:50:57,097 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:50:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:50:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 356 proven. 447 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-10-25 01:50:58,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:50:58,734 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:50:58,734 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 655 with the following transitions: [2018-10-25 01:50:58,735 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1210], [1214], [1217], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:50:58,738 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:50:58,738 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:51:09,739 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:51:09,739 INFO L272 AbstractInterpreter]: Visited 214 different actions 1065 times. Merged at 9 different actions 42 times. Widened at 1 different actions 3 times. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-25 01:51:09,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:51:09,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:51:09,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:51:09,747 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:51:09,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:51:09,757 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:51:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:51:09,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:51:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 644 proven. 41 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2018-10-25 01:51:10,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:51:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 267 proven. 536 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-10-25 01:51:11,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:51:11,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2018-10-25 01:51:11,683 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:51:11,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-25 01:51:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-25 01:51:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2018-10-25 01:51:11,685 INFO L87 Difference]: Start difference. First operand 39832 states and 49023 transitions. Second operand 13 states. [2018-10-25 01:51:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:51:28,818 INFO L93 Difference]: Finished difference Result 97662 states and 122399 transitions. [2018-10-25 01:51:28,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-25 01:51:28,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 654 [2018-10-25 01:51:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:51:29,110 INFO L225 Difference]: With dead ends: 97662 [2018-10-25 01:51:29,110 INFO L226 Difference]: Without dead ends: 54133 [2018-10-25 01:51:29,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1364 GetRequests, 1324 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2018-10-25 01:51:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54133 states. [2018-10-25 01:51:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54133 to 52963. [2018-10-25 01:51:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52963 states. [2018-10-25 01:51:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52963 states to 52963 states and 64960 transitions. [2018-10-25 01:51:31,015 INFO L78 Accepts]: Start accepts. Automaton has 52963 states and 64960 transitions. Word has length 654 [2018-10-25 01:51:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:51:31,016 INFO L481 AbstractCegarLoop]: Abstraction has 52963 states and 64960 transitions. [2018-10-25 01:51:31,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-25 01:51:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 52963 states and 64960 transitions. [2018-10-25 01:51:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-10-25 01:51:31,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:51:31,153 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 01:51:31,153 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:51:31,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:51:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash -59415894, now seen corresponding path program 1 times [2018-10-25 01:51:31,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:51:31,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:51:31,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:51:31,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:51:31,158 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:51:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:51:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 552 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-10-25 01:51:32,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:51:32,581 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:51:32,581 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 708 with the following transitions: [2018-10-25 01:51:32,581 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [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], [465], [473], [481], [489], [497], [505], [513], [521], [529], [533], [535], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1440], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-25 01:51:32,588 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:51:32,589 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-10-25 01:51:39,458 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-25 01:51:39,459 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-25 01:51:39,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-25 01:51:39,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:51:39,460 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:51:39,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:51:39,468 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:51:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:51:39,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:51:39,677 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants Cannot interrupt operation gracefully because timeout expired. Forcing shutdown