java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 10:22:12,490 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 10:22:12,492 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 10:22:12,508 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 10:22:12,509 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 10:22:12,510 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 10:22:12,511 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 10:22:12,513 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 10:22:12,515 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 10:22:12,515 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 10:22:12,516 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 10:22:12,517 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 10:22:12,518 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 10:22:12,519 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 10:22:12,520 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 10:22:12,521 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 10:22:12,522 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 10:22:12,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 10:22:12,526 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 10:22:12,527 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 10:22:12,528 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 10:22:12,530 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 10:22:12,532 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 10:22:12,539 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 10:22:12,539 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 10:22:12,540 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 10:22:12,541 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 10:22:12,541 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 10:22:12,556 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 10:22:12,556 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 10:22:12,557 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 10:22:12,557 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 10:22:12,557 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 10:22:12,558 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 10:22:12,558 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 10:22:12,558 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 10:22:12,558 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 10:22:12,558 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 10:22:12,558 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 10:22:12,559 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 10:22:12,559 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 10:22:12,560 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 10:22:12,560 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 10:22:12,560 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 10:22:12,561 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 10:22:12,561 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 10:22:12,561 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 10:22:12,561 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 10:22:12,561 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 10:22:12,562 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 10:22:12,562 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 10:22:12,562 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 10:22:12,562 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 10:22:12,562 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 10:22:12,563 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 10:22:12,564 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 10:22:12,564 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 10:22:12,565 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 10:22:12,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 10:22:12,565 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 10:22:12,565 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 10:22:12,565 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 10:22:12,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 10:22:12,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 10:22:12,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 10:22:12,655 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 10:22:12,655 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 10:22:12,656 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39_false-unreach-call.c [2018-10-27 10:22:12,720 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c0a742b69/9cff62e92ec0432ca60b58dcbe3806b8/FLAGfea479c5c [2018-10-27 10:22:13,396 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 10:22:13,397 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39_false-unreach-call.c [2018-10-27 10:22:13,415 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c0a742b69/9cff62e92ec0432ca60b58dcbe3806b8/FLAGfea479c5c [2018-10-27 10:22:13,430 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c0a742b69/9cff62e92ec0432ca60b58dcbe3806b8 [2018-10-27 10:22:13,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 10:22:13,443 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 10:22:13,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 10:22:13,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 10:22:13,450 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 10:22:13,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:22:13" (1/1) ... [2018-10-27 10:22:13,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749149db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:13, skipping insertion in model container [2018-10-27 10:22:13,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:22:13" (1/1) ... [2018-10-27 10:22:13,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 10:22:13,562 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 10:22:14,270 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 10:22:14,276 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 10:22:14,555 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 10:22:14,579 INFO L193 MainTranslator]: Completed translation [2018-10-27 10:22:14,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14 WrapperNode [2018-10-27 10:22:14,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 10:22:14,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 10:22:14,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 10:22:14,582 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 10:22:14,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 10:22:14,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 10:22:14,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 10:22:14,881 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 10:22:14,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:14,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... [2018-10-27 10:22:15,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 10:22:15,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 10:22:15,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 10:22:15,014 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 10:22:15,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 10:22:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 10:22:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 10:22:15,091 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 10:22:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 10:22:15,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 10:22:15,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 10:22:15,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 10:22:15,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 10:22:20,128 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 10:22:20,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:22:20 BoogieIcfgContainer [2018-10-27 10:22:20,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 10:22:20,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 10:22:20,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 10:22:20,138 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 10:22:20,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:22:13" (1/3) ... [2018-10-27 10:22:20,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2433cfba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:22:20, skipping insertion in model container [2018-10-27 10:22:20,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:14" (2/3) ... [2018-10-27 10:22:20,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2433cfba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:22:20, skipping insertion in model container [2018-10-27 10:22:20,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:22:20" (3/3) ... [2018-10-27 10:22:20,145 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label39_false-unreach-call.c [2018-10-27 10:22:20,157 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 10:22:20,179 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 10:22:20,200 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 10:22:20,260 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 10:22:20,261 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 10:22:20,261 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 10:22:20,261 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 10:22:20,261 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 10:22:20,262 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 10:22:20,262 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 10:22:20,262 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 10:22:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 10:22:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-27 10:22:20,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:20,336 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:20,339 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:20,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -183050031, now seen corresponding path program 1 times [2018-10-27 10:22:20,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:20,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:20,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:20,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:20,410 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:21,200 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 10:22:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:21,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 10:22:21,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 10:22:21,426 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:21,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 10:22:21,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 10:22:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 10:22:21,456 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 10:22:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:22:23,357 INFO L93 Difference]: Finished difference Result 855 states and 1508 transitions. [2018-10-27 10:22:23,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 10:22:23,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2018-10-27 10:22:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:22:23,385 INFO L225 Difference]: With dead ends: 855 [2018-10-27 10:22:23,385 INFO L226 Difference]: Without dead ends: 541 [2018-10-27 10:22:23,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 10:22:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2018-10-27 10:22:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 527. [2018-10-27 10:22:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-10-27 10:22:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 901 transitions. [2018-10-27 10:22:23,491 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 901 transitions. Word has length 154 [2018-10-27 10:22:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:22:23,492 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 901 transitions. [2018-10-27 10:22:23,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 10:22:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 901 transitions. [2018-10-27 10:22:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-27 10:22:23,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:23,510 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:23,510 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:23,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:23,511 INFO L82 PathProgramCache]: Analyzing trace with hash 963012984, now seen corresponding path program 1 times [2018-10-27 10:22:23,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:23,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:23,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:23,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:23,514 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:23,842 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 10:22:23,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 10:22:23,842 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:23,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 10:22:23,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 10:22:23,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 10:22:23,845 INFO L87 Difference]: Start difference. First operand 527 states and 901 transitions. Second operand 6 states. [2018-10-27 10:22:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:22:27,272 INFO L93 Difference]: Finished difference Result 1590 states and 2790 transitions. [2018-10-27 10:22:27,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 10:22:27,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-10-27 10:22:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:22:27,286 INFO L225 Difference]: With dead ends: 1590 [2018-10-27 10:22:27,287 INFO L226 Difference]: Without dead ends: 1069 [2018-10-27 10:22:27,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 10:22:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-10-27 10:22:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1024. [2018-10-27 10:22:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-10-27 10:22:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1744 transitions. [2018-10-27 10:22:27,375 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1744 transitions. Word has length 164 [2018-10-27 10:22:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:22:27,376 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1744 transitions. [2018-10-27 10:22:27,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 10:22:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1744 transitions. [2018-10-27 10:22:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-27 10:22:27,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:27,382 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:27,383 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:27,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1218185600, now seen corresponding path program 1 times [2018-10-27 10:22:27,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:27,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:27,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:27,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:27,385 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:27,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 10:22:27,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 10:22:27,584 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:27,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 10:22:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 10:22:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 10:22:27,585 INFO L87 Difference]: Start difference. First operand 1024 states and 1744 transitions. Second operand 5 states. [2018-10-27 10:22:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:22:30,897 INFO L93 Difference]: Finished difference Result 3166 states and 5668 transitions. [2018-10-27 10:22:30,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 10:22:30,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2018-10-27 10:22:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:22:30,915 INFO L225 Difference]: With dead ends: 3166 [2018-10-27 10:22:30,916 INFO L226 Difference]: Without dead ends: 2148 [2018-10-27 10:22:30,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 10:22:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2018-10-27 10:22:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2105. [2018-10-27 10:22:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2018-10-27 10:22:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 3420 transitions. [2018-10-27 10:22:31,013 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 3420 transitions. Word has length 165 [2018-10-27 10:22:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:22:31,014 INFO L481 AbstractCegarLoop]: Abstraction has 2105 states and 3420 transitions. [2018-10-27 10:22:31,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 10:22:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 3420 transitions. [2018-10-27 10:22:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-27 10:22:31,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:31,023 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:31,023 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:31,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash -231174827, now seen corresponding path program 1 times [2018-10-27 10:22:31,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:31,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:31,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:31,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:31,026 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:31,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:22:31,881 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:22:31,882 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 168 with the following transitions: [2018-10-27 10:22:31,885 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:22:31,947 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:22:31,947 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:22:33,318 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 10:22:33,320 INFO L272 AbstractInterpreter]: Visited 154 different actions 154 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 10:22:33,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:33,364 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 10:22:34,328 INFO L227 lantSequenceWeakener]: Weakened 161 states. On average, predicates are now at 69.95% of their original sizes. [2018-10-27 10:22:34,329 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 10:22:34,820 INFO L415 sIntCurrentIteration]: We unified 166 AI predicates to 166 [2018-10-27 10:22:34,820 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 10:22:34,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:22:34,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2018-10-27 10:22:34,821 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:34,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 10:22:34,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 10:22:34,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-10-27 10:22:34,823 INFO L87 Difference]: Start difference. First operand 2105 states and 3420 transitions. Second operand 15 states. [2018-10-27 10:22:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:22:58,022 INFO L93 Difference]: Finished difference Result 4414 states and 7147 transitions. [2018-10-27 10:22:58,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 10:22:58,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 167 [2018-10-27 10:22:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:22:58,035 INFO L225 Difference]: With dead ends: 4414 [2018-10-27 10:22:58,036 INFO L226 Difference]: Without dead ends: 2315 [2018-10-27 10:22:58,042 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 169 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2018-10-27 10:22:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2018-10-27 10:22:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2018-10-27 10:22:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2313 states. [2018-10-27 10:22:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3638 transitions. [2018-10-27 10:22:58,104 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3638 transitions. Word has length 167 [2018-10-27 10:22:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:22:58,105 INFO L481 AbstractCegarLoop]: Abstraction has 2313 states and 3638 transitions. [2018-10-27 10:22:58,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 10:22:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3638 transitions. [2018-10-27 10:22:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-27 10:22:58,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:58,111 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:58,111 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:58,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1041049376, now seen corresponding path program 1 times [2018-10-27 10:22:58,112 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:58,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:58,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:58,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:58,114 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:58,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:22:58,422 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:22:58,422 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 177 with the following transitions: [2018-10-27 10:22:58,423 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:22:58,432 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:22:58,433 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:23:00,363 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:23:00,363 INFO L272 AbstractInterpreter]: Visited 158 different actions 311 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:23:00,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:23:00,371 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:23:00,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:23:00,371 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:23:00,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:23:00,380 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:23:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:23:00,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:23:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:23:00,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:23:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:23:01,225 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:23:01,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 10:23:01,225 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:23:01,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 10:23:01,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 10:23:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-27 10:23:01,227 INFO L87 Difference]: Start difference. First operand 2313 states and 3638 transitions. Second operand 3 states. [2018-10-27 10:23:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:23:04,569 INFO L93 Difference]: Finished difference Result 6271 states and 10441 transitions. [2018-10-27 10:23:04,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 10:23:04,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2018-10-27 10:23:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:23:04,595 INFO L225 Difference]: With dead ends: 6271 [2018-10-27 10:23:04,595 INFO L226 Difference]: Without dead ends: 4172 [2018-10-27 10:23:04,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 351 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-27 10:23:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2018-10-27 10:23:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4169. [2018-10-27 10:23:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4169 states. [2018-10-27 10:23:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6136 transitions. [2018-10-27 10:23:04,725 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6136 transitions. Word has length 176 [2018-10-27 10:23:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:23:04,726 INFO L481 AbstractCegarLoop]: Abstraction has 4169 states and 6136 transitions. [2018-10-27 10:23:04,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 10:23:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6136 transitions. [2018-10-27 10:23:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-27 10:23:04,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:23:04,737 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:23:04,737 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:23:04,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:23:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -389152570, now seen corresponding path program 1 times [2018-10-27 10:23:04,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:23:04,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:23:04,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:23:04,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:23:04,739 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:23:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:23:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:23:05,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:23:05,434 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:23:05,435 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 186 with the following transitions: [2018-10-27 10:23:05,435 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [52], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:23:05,442 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:23:05,443 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:23:06,792 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 10:23:06,793 INFO L272 AbstractInterpreter]: Visited 158 different actions 310 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:23:06,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:23:06,831 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 10:23:08,216 INFO L227 lantSequenceWeakener]: Weakened 30 states. On average, predicates are now at 73.76% of their original sizes. [2018-10-27 10:23:08,216 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 10:23:13,009 INFO L415 sIntCurrentIteration]: We unified 184 AI predicates to 184 [2018-10-27 10:23:13,009 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 10:23:13,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:23:13,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [9] total 29 [2018-10-27 10:23:13,010 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:23:13,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 10:23:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 10:23:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-10-27 10:23:13,012 INFO L87 Difference]: Start difference. First operand 4169 states and 6136 transitions. Second operand 22 states. [2018-10-27 10:24:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:21,844 INFO L93 Difference]: Finished difference Result 8755 states and 12916 transitions. [2018-10-27 10:24:21,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 10:24:21,844 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 185 [2018-10-27 10:24:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:21,867 INFO L225 Difference]: With dead ends: 8755 [2018-10-27 10:24:21,868 INFO L226 Difference]: Without dead ends: 4800 [2018-10-27 10:24:21,880 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 131 SyntacticMatches, 33 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2018-10-27 10:24:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4800 states. [2018-10-27 10:24:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4800 to 4797. [2018-10-27 10:24:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4797 states. [2018-10-27 10:24:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 6817 transitions. [2018-10-27 10:24:22,005 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 6817 transitions. Word has length 185 [2018-10-27 10:24:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:22,005 INFO L481 AbstractCegarLoop]: Abstraction has 4797 states and 6817 transitions. [2018-10-27 10:24:22,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 10:24:22,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 6817 transitions. [2018-10-27 10:24:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-27 10:24:22,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:22,017 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:22,017 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:22,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1332642574, now seen corresponding path program 1 times [2018-10-27 10:24:22,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:22,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:22,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:22,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:22,019 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:24:22,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:22,482 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:22,482 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 202 with the following transitions: [2018-10-27 10:24:22,483 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [71], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:22,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:22,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:23,378 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:24:23,379 INFO L272 AbstractInterpreter]: Visited 159 different actions 310 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:24:23,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:23,386 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:24:23,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:23,386 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:24:23,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:23,395 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:24:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:23,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:24:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:23,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:24:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:23,899 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:24:23,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 10:24:23,899 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:24:23,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 10:24:23,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 10:24:23,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 10:24:23,900 INFO L87 Difference]: Start difference. First operand 4797 states and 6817 transitions. Second operand 3 states. [2018-10-27 10:24:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:25,220 INFO L93 Difference]: Finished difference Result 10445 states and 15985 transitions. [2018-10-27 10:24:25,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 10:24:25,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2018-10-27 10:24:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:25,254 INFO L225 Difference]: With dead ends: 10445 [2018-10-27 10:24:25,254 INFO L226 Difference]: Without dead ends: 6490 [2018-10-27 10:24:25,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 400 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 10:24:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2018-10-27 10:24:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6487. [2018-10-27 10:24:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6487 states. [2018-10-27 10:24:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6487 states to 6487 states and 9485 transitions. [2018-10-27 10:24:25,700 INFO L78 Accepts]: Start accepts. Automaton has 6487 states and 9485 transitions. Word has length 201 [2018-10-27 10:24:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:25,701 INFO L481 AbstractCegarLoop]: Abstraction has 6487 states and 9485 transitions. [2018-10-27 10:24:25,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 10:24:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6487 states and 9485 transitions. [2018-10-27 10:24:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-27 10:24:25,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:25,722 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:25,722 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:25,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash -20232175, now seen corresponding path program 1 times [2018-10-27 10:24:25,723 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:25,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:25,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:25,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:25,724 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 10:24:26,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:26,233 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:26,233 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 230 with the following transitions: [2018-10-27 10:24:26,233 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [71], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:26,240 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:26,240 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:27,217 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:24:27,217 INFO L272 AbstractInterpreter]: Visited 160 different actions 312 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:24:27,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:27,222 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:24:27,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:27,222 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:24:27,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:27,230 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:24:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:27,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:24:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-27 10:24:27,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:24:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-27 10:24:27,641 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:24:27,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 10:24:27,641 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:24:27,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 10:24:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 10:24:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 10:24:27,643 INFO L87 Difference]: Start difference. First operand 6487 states and 9485 transitions. Second operand 3 states. [2018-10-27 10:24:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:29,066 INFO L93 Difference]: Finished difference Result 18241 states and 27870 transitions. [2018-10-27 10:24:29,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 10:24:29,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2018-10-27 10:24:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:29,130 INFO L225 Difference]: With dead ends: 18241 [2018-10-27 10:24:29,130 INFO L226 Difference]: Without dead ends: 12177 [2018-10-27 10:24:29,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 456 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 10:24:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2018-10-27 10:24:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12155. [2018-10-27 10:24:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12155 states. [2018-10-27 10:24:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12155 states to 12155 states and 18185 transitions. [2018-10-27 10:24:29,496 INFO L78 Accepts]: Start accepts. Automaton has 12155 states and 18185 transitions. Word has length 229 [2018-10-27 10:24:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:29,496 INFO L481 AbstractCegarLoop]: Abstraction has 12155 states and 18185 transitions. [2018-10-27 10:24:29,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 10:24:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 12155 states and 18185 transitions. [2018-10-27 10:24:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-27 10:24:29,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:29,532 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:29,532 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:29,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -441752321, now seen corresponding path program 1 times [2018-10-27 10:24:29,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:29,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:29,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:29,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:29,534 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 98 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 10:24:30,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:30,040 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:30,040 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2018-10-27 10:24:30,040 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:30,045 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:30,046 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:31,221 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:24:31,222 INFO L272 AbstractInterpreter]: Visited 160 different actions 315 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:24:31,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:31,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:24:31,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:31,228 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:24:31,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:31,235 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:24:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:31,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:24:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:32,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:24:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:32,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:24:32,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 10:24:32,799 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:24:32,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 10:24:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 10:24:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 10:24:32,800 INFO L87 Difference]: Start difference. First operand 12155 states and 18185 transitions. Second operand 9 states. [2018-10-27 10:24:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:36,114 INFO L93 Difference]: Finished difference Result 35021 states and 56031 transitions. [2018-10-27 10:24:36,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 10:24:36,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 238 [2018-10-27 10:24:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:36,234 INFO L225 Difference]: With dead ends: 35021 [2018-10-27 10:24:36,234 INFO L226 Difference]: Without dead ends: 23916 [2018-10-27 10:24:36,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2018-10-27 10:24:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2018-10-27 10:24:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 23308. [2018-10-27 10:24:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23308 states. [2018-10-27 10:24:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23308 states to 23308 states and 32980 transitions. [2018-10-27 10:24:36,988 INFO L78 Accepts]: Start accepts. Automaton has 23308 states and 32980 transitions. Word has length 238 [2018-10-27 10:24:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:36,988 INFO L481 AbstractCegarLoop]: Abstraction has 23308 states and 32980 transitions. [2018-10-27 10:24:36,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 10:24:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 23308 states and 32980 transitions. [2018-10-27 10:24:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-27 10:24:37,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:37,038 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:37,039 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:37,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1184936247, now seen corresponding path program 1 times [2018-10-27 10:24:37,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:37,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:37,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:37,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:37,040 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:37,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:37,549 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:37,550 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2018-10-27 10:24:37,550 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:37,554 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:37,555 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:38,614 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:24:38,614 INFO L272 AbstractInterpreter]: Visited 160 different actions 312 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:24:38,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:38,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:24:38,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:38,621 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:24:38,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:38,629 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:24:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:38,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:24:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:39,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:24:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:39,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:24:39,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 10:24:39,753 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:24:39,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 10:24:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 10:24:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 10:24:39,755 INFO L87 Difference]: Start difference. First operand 23308 states and 32980 transitions. Second operand 9 states. [2018-10-27 10:24:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:45,359 INFO L93 Difference]: Finished difference Result 55319 states and 80387 transitions. [2018-10-27 10:24:45,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-27 10:24:45,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 259 [2018-10-27 10:24:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:45,490 INFO L225 Difference]: With dead ends: 55319 [2018-10-27 10:24:45,491 INFO L226 Difference]: Without dead ends: 33060 [2018-10-27 10:24:45,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 547 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=1488, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 10:24:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33060 states. [2018-10-27 10:24:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33060 to 31251. [2018-10-27 10:24:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31251 states. [2018-10-27 10:24:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31251 states to 31251 states and 39406 transitions. [2018-10-27 10:24:46,341 INFO L78 Accepts]: Start accepts. Automaton has 31251 states and 39406 transitions. Word has length 259 [2018-10-27 10:24:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:46,342 INFO L481 AbstractCegarLoop]: Abstraction has 31251 states and 39406 transitions. [2018-10-27 10:24:46,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 10:24:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 31251 states and 39406 transitions. [2018-10-27 10:24:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-10-27 10:24:46,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:46,399 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 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] [2018-10-27 10:24:46,399 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:46,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1375254200, now seen corresponding path program 1 times [2018-10-27 10:24:46,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:46,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:46,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:46,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:46,401 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 10:24:46,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:46,972 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:46,972 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 310 with the following transitions: [2018-10-27 10:24:46,973 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:46,977 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:46,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:47,899 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 10:24:47,899 INFO L272 AbstractInterpreter]: Visited 159 different actions 312 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:24:47,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:47,909 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 10:24:48,884 INFO L227 lantSequenceWeakener]: Weakened 306 states. On average, predicates are now at 69.95% of their original sizes. [2018-10-27 10:24:48,885 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 10:24:49,578 INFO L415 sIntCurrentIteration]: We unified 308 AI predicates to 308 [2018-10-27 10:24:49,579 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 10:24:49,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:24:49,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-10-27 10:24:49,579 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:24:49,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 10:24:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 10:24:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2018-10-27 10:24:49,581 INFO L87 Difference]: Start difference. First operand 31251 states and 39406 transitions. Second operand 21 states. [2018-10-27 10:25:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:17,615 INFO L93 Difference]: Finished difference Result 55960 states and 70749 transitions. [2018-10-27 10:25:17,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 10:25:17,616 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 309 [2018-10-27 10:25:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:17,727 INFO L225 Difference]: With dead ends: 55960 [2018-10-27 10:25:17,727 INFO L226 Difference]: Without dead ends: 33744 [2018-10-27 10:25:17,765 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 317 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2018-10-27 10:25:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33744 states. [2018-10-27 10:25:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33744 to 33579. [2018-10-27 10:25:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33579 states. [2018-10-27 10:25:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33579 states to 33579 states and 42103 transitions. [2018-10-27 10:25:18,465 INFO L78 Accepts]: Start accepts. Automaton has 33579 states and 42103 transitions. Word has length 309 [2018-10-27 10:25:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:18,466 INFO L481 AbstractCegarLoop]: Abstraction has 33579 states and 42103 transitions. [2018-10-27 10:25:18,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-27 10:25:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 33579 states and 42103 transitions. [2018-10-27 10:25:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-27 10:25:18,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:18,547 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 10:25:18,548 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:18,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:18,548 INFO L82 PathProgramCache]: Analyzing trace with hash 36752577, now seen corresponding path program 1 times [2018-10-27 10:25:18,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:18,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:18,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:18,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:18,549 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:25:18,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:18,953 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:18,953 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 345 with the following transitions: [2018-10-27 10:25:18,954 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [562], [567], [569], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:18,958 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:18,959 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:20,642 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:20,642 INFO L272 AbstractInterpreter]: Visited 160 different actions 315 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:25:20,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:20,644 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:20,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:20,644 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:25:20,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:20,652 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:20,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:25:20,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:25:21,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:21,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 10:25:21,113 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:21,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 10:25:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 10:25:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-27 10:25:21,115 INFO L87 Difference]: Start difference. First operand 33579 states and 42103 transitions. Second operand 9 states. [2018-10-27 10:25:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:25,758 INFO L93 Difference]: Finished difference Result 102170 states and 128982 transitions. [2018-10-27 10:25:25,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-27 10:25:25,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 344 [2018-10-27 10:25:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:25,969 INFO L225 Difference]: With dead ends: 102170 [2018-10-27 10:25:25,969 INFO L226 Difference]: Without dead ends: 69851 [2018-10-27 10:25:26,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 700 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2018-10-27 10:25:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69851 states. [2018-10-27 10:25:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69851 to 65946. [2018-10-27 10:25:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65946 states. [2018-10-27 10:25:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65946 states to 65946 states and 80186 transitions. [2018-10-27 10:25:27,383 INFO L78 Accepts]: Start accepts. Automaton has 65946 states and 80186 transitions. Word has length 344 [2018-10-27 10:25:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:27,384 INFO L481 AbstractCegarLoop]: Abstraction has 65946 states and 80186 transitions. [2018-10-27 10:25:27,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 10:25:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 65946 states and 80186 transitions. [2018-10-27 10:25:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-27 10:25:27,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:27,446 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:27,446 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:27,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash 654929684, now seen corresponding path program 1 times [2018-10-27 10:25:27,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:27,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:27,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:27,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:27,452 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 248 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-27 10:25:28,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:28,684 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:28,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 363 with the following transitions: [2018-10-27 10:25:28,685 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [107], [108], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [543], [548], [550], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:28,690 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:28,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:42,269 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:42,269 INFO L272 AbstractInterpreter]: Visited 163 different actions 2776 times. Merged at 9 different actions 185 times. Widened at 1 different actions 14 times. Found 46 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 10:25:42,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:42,275 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:42,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:42,275 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:25:42,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:42,287 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:42,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-27 10:25:42,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 248 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-27 10:25:42,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:42,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-10-27 10:25:42,974 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:42,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 10:25:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 10:25:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-27 10:25:42,976 INFO L87 Difference]: Start difference. First operand 65946 states and 80186 transitions. Second operand 7 states. [2018-10-27 10:25:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:46,330 INFO L93 Difference]: Finished difference Result 134689 states and 168738 transitions. [2018-10-27 10:25:46,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 10:25:46,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 362 [2018-10-27 10:25:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:46,588 INFO L225 Difference]: With dead ends: 134689 [2018-10-27 10:25:46,588 INFO L226 Difference]: Without dead ends: 70839 [2018-10-27 10:25:46,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 723 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-27 10:25:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70839 states. [2018-10-27 10:25:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70839 to 68939. [2018-10-27 10:25:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68939 states. [2018-10-27 10:25:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68939 states to 68939 states and 82285 transitions. [2018-10-27 10:25:48,119 INFO L78 Accepts]: Start accepts. Automaton has 68939 states and 82285 transitions. Word has length 362 [2018-10-27 10:25:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:48,119 INFO L481 AbstractCegarLoop]: Abstraction has 68939 states and 82285 transitions. [2018-10-27 10:25:48,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 10:25:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 68939 states and 82285 transitions. [2018-10-27 10:25:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-27 10:25:48,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:48,157 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:48,157 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:48,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash 930068788, now seen corresponding path program 1 times [2018-10-27 10:25:48,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:48,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:48,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:48,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:48,159 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-27 10:25:49,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:49,050 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:49,050 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 364 with the following transitions: [2018-10-27 10:25:49,051 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [111], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [543], [548], [550], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:49,054 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:49,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-10-27 10:26:01,259 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-27 10:26:01,260 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-27 10:26:01,260 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 10:26:01,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:26:01,260 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:26:01,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:26:01,268 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:26:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:26:01,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:26:01,530 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-27 10:26:01,731 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 10:26:01,732 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 10:26:01,738 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 10:26:01,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 10:26:01 BoogieIcfgContainer [2018-10-27 10:26:01,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 10:26:01,740 INFO L168 Benchmark]: Toolchain (without parser) took 228297.59 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 339.8 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,741 INFO L168 Benchmark]: CDTParser took 0.19 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. [2018-10-27 10:26:01,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1136.55 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 299.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -881.0 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,743 INFO L168 Benchmark]: Boogie Preprocessor took 132.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,744 INFO L168 Benchmark]: RCFGBuilder took 5117.82 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: 249.1 MB). Peak memory consumption was 249.1 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,744 INFO L168 Benchmark]: TraceAbstraction took 221606.55 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 1.1 GB in the end (delta: 883.7 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1136.55 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 299.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -881.0 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5117.82 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: 249.1 MB). Peak memory consumption was 249.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221606.55 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 1.1 GB in the end (delta: 883.7 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1476]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1476). Cancelled while BasicCegarLoop was analyzing trace of length 364 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 6 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 221.4s OverallTime, 14 OverallIterations, 5 TraceHistogramMax, 153.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3505 SDtfs, 19453 SDslu, 3627 SDs, 0 SdLazy, 26298 SolverSat, 3993 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.2s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 4481 GetRequests, 4232 SyntacticMatches, 52 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 12.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68939occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 37.4s AbstIntTime, 11 AbstIntIterations, 3 AbstIntStrong, 0.9989735297623632 AbsIntWeakeningRatio, 0.2826747720364742 AbsIntAvgWeakeningVarsNumRemoved, 52.56534954407295 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 8522 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 4762 NumberOfCodeBlocks, 4762 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 6544 ConstructedInterpolants, 0 QuantifiedInterpolants, 3061255 SizeOfPredicates, 7 NumberOfNonLiveVariables, 8369 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 27 InterpolantComputations, 9 PerfectInterpolantSequences, 3462/3628 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown