java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:13:22,658 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:13:22,660 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:13:22,681 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:13:22,681 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:13:22,682 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:13:22,684 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:13:22,686 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:13:22,687 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:13:22,688 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:13:22,689 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:13:22,690 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:13:22,691 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:13:22,694 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:13:22,695 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:13:22,696 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:13:22,699 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:13:22,701 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:13:22,703 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:13:22,708 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:13:22,714 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:13:22,719 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:13:22,721 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:13:22,725 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:13:22,725 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:13:22,726 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:13:22,729 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:13:22,730 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:13:22,731 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:13:22,732 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:13:22,732 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:13:22,735 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:13:22,735 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:13:22,735 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:13:22,737 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:13:22,737 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:13:22,738 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 20:13:22,759 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:13:22,759 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:13:22,760 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:13:22,760 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:13:22,760 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:13:22,760 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:13:22,760 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:13:22,761 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:13:22,761 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:13:22,761 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:13:22,761 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:13:22,761 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:13:22,762 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:13:22,762 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:13:22,763 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:13:22,763 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:13:22,763 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:13:22,763 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:13:22,763 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:13:22,763 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:13:22,764 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:13:22,764 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:13:22,764 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:13:22,764 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:13:22,764 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:13:22,765 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:13:22,765 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:13:22,765 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:13:22,765 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:13:22,765 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:13:22,766 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:13:22,766 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:13:22,766 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:13:22,766 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:13:22,766 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:13:22,812 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:13:22,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:13:22,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:13:22,834 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:13:22,834 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:13:22,835 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c [2018-11-07 20:13:22,901 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d520302/08efdc451f184b989b1e7a3bc7400a2e/FLAGf165a2766 [2018-11-07 20:13:23,541 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:13:23,544 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label48_true-unreach-call.c [2018-11-07 20:13:23,560 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d520302/08efdc451f184b989b1e7a3bc7400a2e/FLAGf165a2766 [2018-11-07 20:13:23,576 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d520302/08efdc451f184b989b1e7a3bc7400a2e [2018-11-07 20:13:23,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:13:23,590 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:13:23,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:13:23,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:13:23,597 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:13:23,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:23" (1/1) ... [2018-11-07 20:13:23,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b9e5cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:23, skipping insertion in model container [2018-11-07 20:13:23,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:23" (1/1) ... [2018-11-07 20:13:23,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:13:23,704 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:13:24,286 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:13:24,291 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:13:24,560 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:13:24,581 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:13:24,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24 WrapperNode [2018-11-07 20:13:24,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:13:24,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:13:24,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:13:24,583 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:13:24,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:13:24,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:13:24,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:13:24,752 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:13:24,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... [2018-11-07 20:13:24,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:13:24,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:13:24,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:13:24,896 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:13:24,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:13:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:13:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:13:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:13:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:13:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:13:24,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:13:24,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:13:24,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:13:24,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:13:29,586 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:13:29,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:29 BoogieIcfgContainer [2018-11-07 20:13:29,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:13:29,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:13:29,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:13:29,592 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:13:29,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:13:23" (1/3) ... [2018-11-07 20:13:29,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62be396d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:29, skipping insertion in model container [2018-11-07 20:13:29,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:24" (2/3) ... [2018-11-07 20:13:29,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62be396d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:29, skipping insertion in model container [2018-11-07 20:13:29,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:29" (3/3) ... [2018-11-07 20:13:29,596 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label48_true-unreach-call.c [2018-11-07 20:13:29,607 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:13:29,619 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:13:29,639 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:13:29,681 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:13:29,681 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:13:29,681 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:13:29,681 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:13:29,681 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:13:29,682 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:13:29,682 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:13:29,682 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:13:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 20:13:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-07 20:13:29,726 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:29,728 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] [2018-11-07 20:13:29,730 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:29,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1192581977, now seen corresponding path program 1 times [2018-11-07 20:13:29,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:29,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:29,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:29,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:29,802 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:30,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:13:30,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:13:30,293 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:30,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:13:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:13:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:13:30,319 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 20:13:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:33,801 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-11-07 20:13:33,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:13:33,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2018-11-07 20:13:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:33,827 INFO L225 Difference]: With dead ends: 979 [2018-11-07 20:13:33,827 INFO L226 Difference]: Without dead ends: 680 [2018-11-07 20:13:33,835 INFO L604 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 [2018-11-07 20:13:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-11-07 20:13:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-11-07 20:13:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-11-07 20:13:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-11-07 20:13:33,923 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 57 [2018-11-07 20:13:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:33,924 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-11-07 20:13:33,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:13:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-11-07 20:13:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-07 20:13:33,932 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:33,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:33,933 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:33,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1879663307, now seen corresponding path program 1 times [2018-11-07 20:13:33,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:33,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:33,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:33,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:33,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:34,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:13:34,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:13:34,252 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:34,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:13:34,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:13:34,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:13:34,255 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-11-07 20:13:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:38,289 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-11-07 20:13:38,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:13:38,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-11-07 20:13:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:38,299 INFO L225 Difference]: With dead ends: 1555 [2018-11-07 20:13:38,300 INFO L226 Difference]: Without dead ends: 1077 [2018-11-07 20:13:38,303 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:13:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-11-07 20:13:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-11-07 20:13:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-11-07 20:13:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-11-07 20:13:38,382 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 130 [2018-11-07 20:13:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:38,383 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-11-07 20:13:38,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:13:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-11-07 20:13:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-07 20:13:38,388 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:38,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:38,389 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:38,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:38,389 INFO L82 PathProgramCache]: Analyzing trace with hash -399877285, now seen corresponding path program 1 times [2018-11-07 20:13:38,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:38,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:38,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:38,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:38,391 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:38,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:13:38,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:13:38,677 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:38,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:13:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:13:38,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:13:38,679 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 6 states. [2018-11-07 20:13:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:43,354 INFO L93 Difference]: Finished difference Result 3120 states and 4754 transitions. [2018-11-07 20:13:43,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:13:43,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2018-11-07 20:13:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:43,380 INFO L225 Difference]: With dead ends: 3120 [2018-11-07 20:13:43,380 INFO L226 Difference]: Without dead ends: 2063 [2018-11-07 20:13:43,389 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:13:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2018-11-07 20:13:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2021. [2018-11-07 20:13:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2021 states. [2018-11-07 20:13:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2840 transitions. [2018-11-07 20:13:43,474 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2840 transitions. Word has length 138 [2018-11-07 20:13:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:43,477 INFO L480 AbstractCegarLoop]: Abstraction has 2021 states and 2840 transitions. [2018-11-07 20:13:43,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:13:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2840 transitions. [2018-11-07 20:13:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-07 20:13:43,485 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:43,486 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:43,486 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:43,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:43,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1244588704, now seen corresponding path program 1 times [2018-11-07 20:13:43,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:43,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:43,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:43,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:43,489 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:44,220 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:13:44,450 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-11-07 20:13:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:13:44,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:44,564 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:44,565 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 213 with the following transitions: [2018-11-07 20:13:44,567 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:44,613 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:44,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:45,119 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:45,121 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 20:13:45,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:45,163 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:45,876 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 73.67% of their original sizes. [2018-11-07 20:13:45,876 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:46,228 INFO L415 sIntCurrentIteration]: We unified 211 AI predicates to 211 [2018-11-07 20:13:46,228 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:46,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:46,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 20:13:46,230 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:46,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:13:46,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:13:46,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:13:46,231 INFO L87 Difference]: Start difference. First operand 2021 states and 2840 transitions. Second operand 7 states. [2018-11-07 20:13:49,102 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:57,507 INFO L93 Difference]: Finished difference Result 4228 states and 5889 transitions. [2018-11-07 20:13:57,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:13:57,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 212 [2018-11-07 20:13:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:57,520 INFO L225 Difference]: With dead ends: 4228 [2018-11-07 20:13:57,521 INFO L226 Difference]: Without dead ends: 2213 [2018-11-07 20:13:57,528 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:13:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2018-11-07 20:13:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2211. [2018-11-07 20:13:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2018-11-07 20:13:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3039 transitions. [2018-11-07 20:13:57,601 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3039 transitions. Word has length 212 [2018-11-07 20:13:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:57,602 INFO L480 AbstractCegarLoop]: Abstraction has 2211 states and 3039 transitions. [2018-11-07 20:13:57,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:13:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3039 transitions. [2018-11-07 20:13:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-11-07 20:13:57,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:57,608 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:57,609 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:57,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1358707587, now seen corresponding path program 1 times [2018-11-07 20:13:57,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:57,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:57,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:57,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:57,611 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 20:13:58,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:58,242 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:58,242 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 256 with the following transitions: [2018-11-07 20:13:58,242 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:58,249 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:58,250 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:58,383 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:58,892 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:13:58,892 INFO L272 AbstractInterpreter]: Visited 126 different actions 495 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:13:58,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:58,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:13:58,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:58,896 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:13:58,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:58,911 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:13:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:59,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:13:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:59,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:13:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:59,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:13:59,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 20:13:59,717 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:13:59,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:13:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:13:59,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-07 20:13:59,719 INFO L87 Difference]: Start difference. First operand 2211 states and 3039 transitions. Second operand 10 states. [2018-11-07 20:14:00,286 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:14:03,536 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-11-07 20:14:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:18,358 INFO L93 Difference]: Finished difference Result 13901 states and 21473 transitions. [2018-11-07 20:14:18,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-07 20:14:18,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 255 [2018-11-07 20:14:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:18,426 INFO L225 Difference]: With dead ends: 13901 [2018-11-07 20:14:18,427 INFO L226 Difference]: Without dead ends: 11886 [2018-11-07 20:14:18,455 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 532 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=858, Invalid=3834, Unknown=0, NotChecked=0, Total=4692 [2018-11-07 20:14:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2018-11-07 20:14:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11636. [2018-11-07 20:14:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11636 states. [2018-11-07 20:14:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11636 states to 11636 states and 15415 transitions. [2018-11-07 20:14:18,743 INFO L78 Accepts]: Start accepts. Automaton has 11636 states and 15415 transitions. Word has length 255 [2018-11-07 20:14:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:18,743 INFO L480 AbstractCegarLoop]: Abstraction has 11636 states and 15415 transitions. [2018-11-07 20:14:18,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:14:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 11636 states and 15415 transitions. [2018-11-07 20:14:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-11-07 20:14:18,756 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:18,756 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:14:18,756 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:18,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2050879004, now seen corresponding path program 1 times [2018-11-07 20:14:18,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:18,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:18,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:18,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:18,759 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-07 20:14:19,151 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:14:19,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:14:19,152 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:19,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:14:19,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:14:19,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:14:19,153 INFO L87 Difference]: Start difference. First operand 11636 states and 15415 transitions. Second operand 4 states. [2018-11-07 20:14:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:21,601 INFO L93 Difference]: Finished difference Result 31653 states and 44073 transitions. [2018-11-07 20:14:21,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:14:21,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 276 [2018-11-07 20:14:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:21,697 INFO L225 Difference]: With dead ends: 31653 [2018-11-07 20:14:21,697 INFO L226 Difference]: Without dead ends: 20404 [2018-11-07 20:14:21,758 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:14:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20404 states. [2018-11-07 20:14:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20404 to 19088. [2018-11-07 20:14:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19088 states. [2018-11-07 20:14:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19088 states to 19088 states and 24852 transitions. [2018-11-07 20:14:22,193 INFO L78 Accepts]: Start accepts. Automaton has 19088 states and 24852 transitions. Word has length 276 [2018-11-07 20:14:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:22,193 INFO L480 AbstractCegarLoop]: Abstraction has 19088 states and 24852 transitions. [2018-11-07 20:14:22,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:14:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 19088 states and 24852 transitions. [2018-11-07 20:14:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-07 20:14:22,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:22,216 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:14:22,216 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:22,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1875512821, now seen corresponding path program 1 times [2018-11-07 20:14:22,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:22,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:22,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:22,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:22,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:23,186 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 10 [2018-11-07 20:14:23,857 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 3 [2018-11-07 20:14:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 5 proven. 102 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-11-07 20:14:23,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:23,941 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:23,941 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-07 20:14:23,942 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [780], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:23,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:23,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:24,302 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:25,157 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:14:25,158 INFO L272 AbstractInterpreter]: Visited 140 different actions 550 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:14:25,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:25,200 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:14:25,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:25,201 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:14:25,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:25,218 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:14:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:25,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:14:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 20:14:25,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:14:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 20:14:26,359 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:14:26,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 9 [2018-11-07 20:14:26,360 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:26,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:14:26,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:14:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:14:26,361 INFO L87 Difference]: Start difference. First operand 19088 states and 24852 transitions. Second operand 3 states. [2018-11-07 20:14:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:28,623 INFO L93 Difference]: Finished difference Result 43479 states and 57747 transitions. [2018-11-07 20:14:28,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:14:28,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 305 [2018-11-07 20:14:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:28,708 INFO L225 Difference]: With dead ends: 43479 [2018-11-07 20:14:28,708 INFO L226 Difference]: Without dead ends: 26099 [2018-11-07 20:14:28,745 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 611 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:14:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26099 states. [2018-11-07 20:14:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26099 to 26069. [2018-11-07 20:14:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26069 states. [2018-11-07 20:14:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26069 states to 26069 states and 33396 transitions. [2018-11-07 20:14:29,199 INFO L78 Accepts]: Start accepts. Automaton has 26069 states and 33396 transitions. Word has length 305 [2018-11-07 20:14:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:29,200 INFO L480 AbstractCegarLoop]: Abstraction has 26069 states and 33396 transitions. [2018-11-07 20:14:29,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:14:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 26069 states and 33396 transitions. [2018-11-07 20:14:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-11-07 20:14:29,233 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:29,233 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:14:29,233 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:29,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1398455572, now seen corresponding path program 1 times [2018-11-07 20:14:29,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:29,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:29,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:29,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:29,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:30,114 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:14:30,347 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 20:14:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:31,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:31,229 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:31,229 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 339 with the following transitions: [2018-11-07 20:14:31,230 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [873], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:31,235 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:31,235 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:31,455 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:32,546 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:14:32,546 INFO L272 AbstractInterpreter]: Visited 160 different actions 633 times. Merged at 7 different actions 29 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:14:32,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:32,584 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:14:32,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:32,584 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:14:32,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:32,598 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:14:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:32,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:14:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:33,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:14:33,289 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 20:14:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:14:33,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:14:33,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2018-11-07 20:14:33,797 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:14:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:14:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:14:33,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-11-07 20:14:33,799 INFO L87 Difference]: Start difference. First operand 26069 states and 33396 transitions. Second operand 17 states. [2018-11-07 20:14:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:41,559 INFO L93 Difference]: Finished difference Result 52044 states and 70667 transitions. [2018-11-07 20:14:41,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-07 20:14:41,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 338 [2018-11-07 20:14:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:41,661 INFO L225 Difference]: With dead ends: 52044 [2018-11-07 20:14:41,661 INFO L226 Difference]: Without dead ends: 26364 [2018-11-07 20:14:41,726 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 685 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=775, Invalid=2305, Unknown=0, NotChecked=0, Total=3080 [2018-11-07 20:14:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2018-11-07 20:14:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 25386. [2018-11-07 20:14:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25386 states. [2018-11-07 20:14:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25386 states to 25386 states and 32158 transitions. [2018-11-07 20:14:42,263 INFO L78 Accepts]: Start accepts. Automaton has 25386 states and 32158 transitions. Word has length 338 [2018-11-07 20:14:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:42,264 INFO L480 AbstractCegarLoop]: Abstraction has 25386 states and 32158 transitions. [2018-11-07 20:14:42,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 20:14:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 25386 states and 32158 transitions. [2018-11-07 20:14:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-11-07 20:14:42,298 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:42,299 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:14:42,299 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:42,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1144752425, now seen corresponding path program 1 times [2018-11-07 20:14:42,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:42,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:42,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:42,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:42,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 20:14:42,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:42,643 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:42,643 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: [2018-11-07 20:14:42,643 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [606], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:42,646 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:42,647 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:42,749 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:42,923 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:14:42,924 INFO L272 AbstractInterpreter]: Visited 126 different actions 246 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:14:42,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:42,961 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:14:43,694 INFO L227 lantSequenceWeakener]: Weakened 343 states. On average, predicates are now at 73.49% of their original sizes. [2018-11-07 20:14:43,696 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:14:43,872 INFO L415 sIntCurrentIteration]: We unified 345 AI predicates to 345 [2018-11-07 20:14:43,872 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:14:43,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:14:43,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:14:43,873 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:43,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:14:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:14:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:14:43,874 INFO L87 Difference]: Start difference. First operand 25386 states and 32158 transitions. Second operand 11 states. [2018-11-07 20:14:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:57,575 INFO L93 Difference]: Finished difference Result 50580 states and 64125 transitions. [2018-11-07 20:14:57,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:14:57,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 346 [2018-11-07 20:14:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:57,647 INFO L225 Difference]: With dead ends: 50580 [2018-11-07 20:14:57,647 INFO L226 Difference]: Without dead ends: 25583 [2018-11-07 20:14:57,694 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 354 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:14:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25583 states. [2018-11-07 20:14:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25583 to 25578. [2018-11-07 20:14:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25578 states. [2018-11-07 20:14:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25578 states to 25578 states and 32369 transitions. [2018-11-07 20:14:58,876 INFO L78 Accepts]: Start accepts. Automaton has 25578 states and 32369 transitions. Word has length 346 [2018-11-07 20:14:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:58,876 INFO L480 AbstractCegarLoop]: Abstraction has 25578 states and 32369 transitions. [2018-11-07 20:14:58,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:14:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25578 states and 32369 transitions. [2018-11-07 20:14:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-11-07 20:14:58,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:58,913 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:14:58,913 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:58,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:58,914 INFO L82 PathProgramCache]: Analyzing trace with hash -294493282, now seen corresponding path program 1 times [2018-11-07 20:14:58,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:58,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:58,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:58,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:58,915 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 20:14:59,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:59,450 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:59,450 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 366 with the following transitions: [2018-11-07 20:14:59,450 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [645], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:59,453 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:59,453 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:59,547 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:59,785 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:14:59,785 INFO L272 AbstractInterpreter]: Visited 136 different actions 395 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:14:59,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:59,793 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:15:00,276 INFO L227 lantSequenceWeakener]: Weakened 362 states. On average, predicates are now at 73.47% of their original sizes. [2018-11-07 20:15:00,276 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:15:00,458 INFO L415 sIntCurrentIteration]: We unified 364 AI predicates to 364 [2018-11-07 20:15:00,458 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:15:00,458 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:15:00,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:15:00,458 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:15:00,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:15:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:15:00,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:15:00,459 INFO L87 Difference]: Start difference. First operand 25578 states and 32369 transitions. Second operand 11 states. [2018-11-07 20:15:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:15:08,530 INFO L93 Difference]: Finished difference Result 51157 states and 64763 transitions. [2018-11-07 20:15:08,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:15:08,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 365 [2018-11-07 20:15:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:15:08,603 INFO L225 Difference]: With dead ends: 51157 [2018-11-07 20:15:08,603 INFO L226 Difference]: Without dead ends: 26160 [2018-11-07 20:15:08,645 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 374 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:15:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26160 states. [2018-11-07 20:15:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26160 to 25964. [2018-11-07 20:15:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25964 states. [2018-11-07 20:15:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 32785 transitions. [2018-11-07 20:15:09,079 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 32785 transitions. Word has length 365 [2018-11-07 20:15:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:15:09,080 INFO L480 AbstractCegarLoop]: Abstraction has 25964 states and 32785 transitions. [2018-11-07 20:15:09,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:15:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 32785 transitions. [2018-11-07 20:15:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-11-07 20:15:09,118 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:15:09,118 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:15:09,118 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:15:09,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:09,122 INFO L82 PathProgramCache]: Analyzing trace with hash -577530580, now seen corresponding path program 1 times [2018-11-07 20:15:09,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:15:09,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:09,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:09,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:09,123 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:15:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 349 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:15:10,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:10,311 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:15:10,311 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 371 with the following transitions: [2018-11-07 20:15:10,311 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:15:10,313 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:15:10,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:15:10,418 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:15:11,725 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:15:11,725 INFO L272 AbstractInterpreter]: Visited 127 different actions 627 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:15:11,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:11,736 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:15:11,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:11,736 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:15:11,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:11,745 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:15:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:11,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:15:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:15:12,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:15:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 347 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:15:12,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:15:12,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 20:15:12,724 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:15:12,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 20:15:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 20:15:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:15:12,727 INFO L87 Difference]: Start difference. First operand 25964 states and 32785 transitions. Second operand 18 states. [2018-11-07 20:15:15,364 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-11-07 20:15:15,942 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2018-11-07 20:15:19,197 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2018-11-07 20:15:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:15:26,642 INFO L93 Difference]: Finished difference Result 65132 states and 88822 transitions. [2018-11-07 20:15:26,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-07 20:15:26,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 370 [2018-11-07 20:15:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:15:26,729 INFO L225 Difference]: With dead ends: 65132 [2018-11-07 20:15:26,729 INFO L226 Difference]: Without dead ends: 28353 [2018-11-07 20:15:26,829 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 780 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1075, Invalid=4181, Unknown=0, NotChecked=0, Total=5256 [2018-11-07 20:15:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28353 states. [2018-11-07 20:15:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28353 to 25472. [2018-11-07 20:15:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25472 states. [2018-11-07 20:15:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25472 states to 25472 states and 29555 transitions. [2018-11-07 20:15:27,302 INFO L78 Accepts]: Start accepts. Automaton has 25472 states and 29555 transitions. Word has length 370 [2018-11-07 20:15:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:15:27,303 INFO L480 AbstractCegarLoop]: Abstraction has 25472 states and 29555 transitions. [2018-11-07 20:15:27,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 20:15:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25472 states and 29555 transitions. [2018-11-07 20:15:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-11-07 20:15:27,317 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:15:27,317 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:15:27,317 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:15:27,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1370950634, now seen corresponding path program 1 times [2018-11-07 20:15:27,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:15:27,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:27,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:27,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:27,319 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:15:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 176 proven. 124 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 20:15:28,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:28,236 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:15:28,236 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 391 with the following transitions: [2018-11-07 20:15:28,236 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:15:28,239 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:15:28,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:15:28,308 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:15:28,842 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:15:28,842 INFO L272 AbstractInterpreter]: Visited 157 different actions 458 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:15:28,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:28,851 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:15:30,153 INFO L227 lantSequenceWeakener]: Weakened 114 states. On average, predicates are now at 74.68% of their original sizes. [2018-11-07 20:15:30,153 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:15:30,553 INFO L415 sIntCurrentIteration]: We unified 389 AI predicates to 389 [2018-11-07 20:15:30,553 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:15:30,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:15:30,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [16] total 35 [2018-11-07 20:15:30,554 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:15:30,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:15:30,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:15:30,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:15:30,556 INFO L87 Difference]: Start difference. First operand 25472 states and 29555 transitions. Second operand 21 states. [2018-11-07 20:16:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:16:00,633 INFO L93 Difference]: Finished difference Result 50950 states and 59182 transitions. [2018-11-07 20:16:00,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 20:16:00,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 390 [2018-11-07 20:16:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:16:01,345 INFO L225 Difference]: With dead ends: 50950 [2018-11-07 20:16:01,346 INFO L226 Difference]: Without dead ends: 26252 [2018-11-07 20:16:01,366 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 407 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 20:16:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26252 states. [2018-11-07 20:16:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26252 to 26242. [2018-11-07 20:16:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26242 states. [2018-11-07 20:16:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26242 states to 26242 states and 30375 transitions. [2018-11-07 20:16:01,752 INFO L78 Accepts]: Start accepts. Automaton has 26242 states and 30375 transitions. Word has length 390 [2018-11-07 20:16:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:16:01,752 INFO L480 AbstractCegarLoop]: Abstraction has 26242 states and 30375 transitions. [2018-11-07 20:16:01,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:16:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 26242 states and 30375 transitions. [2018-11-07 20:16:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-11-07 20:16:01,763 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:16:01,764 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:16:01,764 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:16:01,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2071720539, now seen corresponding path program 1 times [2018-11-07 20:16:01,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:16:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:01,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:01,766 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:16:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 303 proven. 48 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-11-07 20:16:02,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:02,699 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:16:02,699 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 393 with the following transitions: [2018-11-07 20:16:02,699 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [582], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:16:02,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:16:02,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:16:02,856 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:16:04,417 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:16:04,417 INFO L272 AbstractInterpreter]: Visited 142 different actions 980 times. Merged at 8 different actions 57 times. Widened at 1 different actions 2 times. Found 12 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:16:04,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:04,427 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:16:04,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:04,427 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:16:04,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:04,438 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:16:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:04,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:16:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 354 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 20:16:10,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:16:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 156 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:16:11,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:16:11,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 11] total 30 [2018-11-07 20:16:11,610 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:16:11,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 20:16:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 20:16:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:16:11,612 INFO L87 Difference]: Start difference. First operand 26242 states and 30375 transitions. Second operand 22 states. [2018-11-07 20:16:11,833 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-11-07 20:16:11,959 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-11-07 20:16:16,623 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2018-11-07 20:16:17,055 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2018-11-07 20:16:17,390 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-11-07 20:16:17,771 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2018-11-07 20:16:22,051 WARN L179 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-11-07 20:16:22,296 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2018-11-07 20:16:24,288 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2018-11-07 20:16:25,781 WARN L179 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-11-07 20:16:28,161 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2018-11-07 20:16:30,147 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-11-07 20:16:31,558 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-11-07 20:16:32,274 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 20:16:36,547 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2018-11-07 20:16:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:16:41,096 INFO L93 Difference]: Finished difference Result 73847 states and 92587 transitions. [2018-11-07 20:16:41,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-11-07 20:16:41,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 392 [2018-11-07 20:16:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:16:41,248 INFO L225 Difference]: With dead ends: 73847 [2018-11-07 20:16:41,248 INFO L226 Difference]: Without dead ends: 42871 [2018-11-07 20:16:41,332 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 865 SyntacticMatches, 4 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8250 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3664, Invalid=18986, Unknown=0, NotChecked=0, Total=22650 [2018-11-07 20:16:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42871 states. [2018-11-07 20:16:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42871 to 38613. [2018-11-07 20:16:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38613 states. [2018-11-07 20:16:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38613 states to 38613 states and 45622 transitions. [2018-11-07 20:16:42,068 INFO L78 Accepts]: Start accepts. Automaton has 38613 states and 45622 transitions. Word has length 392 [2018-11-07 20:16:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:16:42,068 INFO L480 AbstractCegarLoop]: Abstraction has 38613 states and 45622 transitions. [2018-11-07 20:16:42,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 20:16:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 38613 states and 45622 transitions. [2018-11-07 20:16:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-11-07 20:16:42,083 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:16:42,083 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:16:42,084 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:16:42,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1727589629, now seen corresponding path program 1 times [2018-11-07 20:16:42,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:16:42,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:42,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:42,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:16:42,085 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:16:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 326 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 20:16:43,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:43,264 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:16:43,264 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 414 with the following transitions: [2018-11-07 20:16:43,264 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [357], [359], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [986], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:16:43,267 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:16:43,267 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:16:43,332 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:16:44,268 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:16:44,269 INFO L272 AbstractInterpreter]: Visited 182 different actions 722 times. Merged at 7 different actions 29 times. Widened at 1 different actions 1 times. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:16:44,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:16:44,277 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:16:44,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:16:44,277 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:16:44,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:16:44,287 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:16:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:16:44,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:16:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 20:16:45,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:16:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 20:16:46,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:16:46,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 20:16:46,149 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:16:46,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:16:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:16:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-11-07 20:16:46,151 INFO L87 Difference]: Start difference. First operand 38613 states and 45622 transitions. Second operand 17 states. [2018-11-07 20:16:48,034 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 Received shutdown request... [2018-11-07 20:16:52,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-07 20:16:52,109 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:16:52,115 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:16:52,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:16:52 BoogieIcfgContainer [2018-11-07 20:16:52,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:16:52,116 INFO L168 Benchmark]: Toolchain (without parser) took 208526.69 ms. Allocated memory was 1.5 GB in the beginning and 5.0 GB in the end (delta: 3.5 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -803.0 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-11-07 20:16:52,117 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:16:52,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 990.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 20:16:52,118 INFO L168 Benchmark]: Boogie Procedure Inliner took 169.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -834.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:16:52,119 INFO L168 Benchmark]: Boogie Preprocessor took 142.85 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:16:52,120 INFO L168 Benchmark]: RCFGBuilder took 4692.42 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 177.2 MB). Peak memory consumption was 177.2 MB. Max. memory is 7.1 GB. [2018-11-07 20:16:52,121 INFO L168 Benchmark]: TraceAbstraction took 202526.42 ms. Allocated memory was 2.3 GB in the beginning and 5.0 GB in the end (delta: 2.8 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -208.9 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-11-07 20:16:52,125 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 990.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 169.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -834.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.85 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4692.42 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 177.2 MB). Peak memory consumption was 177.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202526.42 ms. Allocated memory was 2.3 GB in the beginning and 5.0 GB in the end (delta: 2.8 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -208.9 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 156]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 156). Cancelled while BasicCegarLoop was constructing difference of abstraction (38613states) and FLOYD_HOARE automaton (currently 32 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (12313 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 202.4s OverallTime, 14 OverallIterations, 4 TraceHistogramMax, 157.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3382 SDtfs, 38059 SDslu, 5567 SDs, 0 SdLazy, 53928 SolverSat, 10937 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79.4s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 6099 GetRequests, 5595 SyntacticMatches, 16 SemanticMatches, 488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13100 ImplicationChecksByTransitivity, 27.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38613occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.3s AbstIntTime, 10 AbstIntIterations, 4 AbstIntStrong, 0.9976968129909315 AbsIntWeakeningRatio, 0.09931245225362872 AbsIntAvgWeakeningVarsNumRemoved, 20.59816653934301 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 10178 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.1s InterpolantComputationTime, 6060 NumberOfCodeBlocks, 6060 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 8107 ConstructedInterpolants, 0 QuantifiedInterpolants, 18932686 SizeOfPredicates, 13 NumberOfNonLiveVariables, 3438 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 6496/7420 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown