java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:30:18,407 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:30:18,409 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:30:18,421 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:30:18,421 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:30:18,423 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:30:18,424 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:30:18,426 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:30:18,428 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:30:18,429 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:30:18,430 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:30:18,430 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:30:18,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:30:18,432 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:30:18,434 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:30:18,434 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:30:18,435 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:30:18,437 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:30:18,439 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:30:18,441 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:30:18,442 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:30:18,444 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:30:18,447 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:30:18,447 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:30:18,447 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:30:18,448 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:30:18,449 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:30:18,450 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:30:18,451 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:30:18,452 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:30:18,453 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:30:18,453 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 08:30:18,454 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 08:30:18,454 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 08:30:18,455 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 08:30:18,456 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 08:30:18,456 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:30:18,485 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:30:18,485 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:30:18,487 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:30:18,487 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:30:18,492 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:30:18,492 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:30:18,492 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:30:18,493 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:30:18,493 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:30:18,493 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:30:18,493 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:30:18,493 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:30:18,493 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:30:18,494 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:30:18,494 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:30:18,496 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:30:18,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:30:18,496 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:30:18,496 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:30:18,497 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:30:18,497 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:30:18,497 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:30:18,497 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:30:18,497 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:30:18,498 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:30:18,499 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:30:18,499 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:30:18,499 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:30:18,500 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:30:18,500 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:30:18,500 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:30:18,500 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:30:18,500 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:30:18,500 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:30:18,501 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:30:18,501 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:30:18,549 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:30:18,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:30:18,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:30:18,573 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:30:18,573 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:30:18,574 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c [2018-11-07 08:30:18,639 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3d4b891/2139bb1bc0e34fd39885bee85404ff0b/FLAG5402a3528 [2018-11-07 08:30:19,262 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:30:19,263 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c [2018-11-07 08:30:19,278 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3d4b891/2139bb1bc0e34fd39885bee85404ff0b/FLAG5402a3528 [2018-11-07 08:30:19,298 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3d4b891/2139bb1bc0e34fd39885bee85404ff0b [2018-11-07 08:30:19,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:30:19,315 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:30:19,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:30:19,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:30:19,322 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:30:19,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:30:19" (1/1) ... [2018-11-07 08:30:19,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e88097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:19, skipping insertion in model container [2018-11-07 08:30:19,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:30:19" (1/1) ... [2018-11-07 08:30:19,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:30:19,429 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:30:20,131 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:30:20,136 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:30:20,287 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:30:20,305 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:30:20,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20 WrapperNode [2018-11-07 08:30:20,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:30:20,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:30:20,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:30:20,308 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:30:20,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:30:20,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:30:20,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:30:20,468 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:30:20,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... [2018-11-07 08:30:20,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:30:20,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:30:20,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:30:20,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:30:20,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:30:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:30:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:30:20,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:30:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:30:20,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:30:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:30:20,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:30:20,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:30:20,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:30:25,648 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:30:25,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:30:25 BoogieIcfgContainer [2018-11-07 08:30:25,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:30:25,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:30:25,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:30:25,654 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:30:25,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:30:19" (1/3) ... [2018-11-07 08:30:25,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dcc9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:30:25, skipping insertion in model container [2018-11-07 08:30:25,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:30:20" (2/3) ... [2018-11-07 08:30:25,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dcc9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:30:25, skipping insertion in model container [2018-11-07 08:30:25,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:30:25" (3/3) ... [2018-11-07 08:30:25,658 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label28_true-unreach-call.c [2018-11-07 08:30:25,668 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:30:25,679 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:30:25,698 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:30:25,746 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:30:25,746 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:30:25,746 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:30:25,746 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:30:25,746 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:30:25,747 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:30:25,747 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:30:25,747 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:30:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 08:30:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-07 08:30:25,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:25,799 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] [2018-11-07 08:30:25,802 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:25,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash -718311439, now seen corresponding path program 1 times [2018-11-07 08:30:25,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:25,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:25,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:25,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:25,856 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:26,365 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 08:30:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:26,386 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:26,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:30:26,386 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:26,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:30:26,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:30:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:26,412 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 08:30:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:29,782 INFO L93 Difference]: Finished difference Result 982 states and 1758 transitions. [2018-11-07 08:30:29,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:30:29,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-11-07 08:30:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:29,807 INFO L225 Difference]: With dead ends: 982 [2018-11-07 08:30:29,807 INFO L226 Difference]: Without dead ends: 683 [2018-11-07 08:30:29,817 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-11-07 08:30:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2018-11-07 08:30:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-11-07 08:30:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1005 transitions. [2018-11-07 08:30:29,927 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1005 transitions. Word has length 55 [2018-11-07 08:30:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:29,928 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 1005 transitions. [2018-11-07 08:30:29,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:30:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1005 transitions. [2018-11-07 08:30:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-07 08:30:29,937 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:29,937 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:30:29,938 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:29,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2084126164, now seen corresponding path program 1 times [2018-11-07 08:30:29,939 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:29,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:29,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:29,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:29,940 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:30,237 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:30,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:30:30,237 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:30,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:30:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:30:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:30,241 INFO L87 Difference]: Start difference. First operand 683 states and 1005 transitions. Second operand 4 states. [2018-11-07 08:30:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:34,479 INFO L93 Difference]: Finished difference Result 2512 states and 3858 transitions. [2018-11-07 08:30:34,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:30:34,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2018-11-07 08:30:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:34,497 INFO L225 Difference]: With dead ends: 2512 [2018-11-07 08:30:34,497 INFO L226 Difference]: Without dead ends: 1835 [2018-11-07 08:30:34,504 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:30:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2018-11-07 08:30:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1820. [2018-11-07 08:30:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1820 states. [2018-11-07 08:30:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2585 transitions. [2018-11-07 08:30:34,620 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2585 transitions. Word has length 129 [2018-11-07 08:30:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:34,624 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 2585 transitions. [2018-11-07 08:30:34,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:30:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2585 transitions. [2018-11-07 08:30:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 08:30:34,639 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:34,639 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:30:34,641 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:34,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash 643157075, now seen corresponding path program 1 times [2018-11-07 08:30:34,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:34,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:34,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:34,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:34,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:30:35,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:30:35,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 08:30:35,094 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:35,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:30:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:30:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:30:35,096 INFO L87 Difference]: Start difference. First operand 1820 states and 2585 transitions. Second operand 6 states. [2018-11-07 08:30:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:30:39,641 INFO L93 Difference]: Finished difference Result 6276 states and 9168 transitions. [2018-11-07 08:30:39,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:30:39,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-07 08:30:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:30:39,681 INFO L225 Difference]: With dead ends: 6276 [2018-11-07 08:30:39,681 INFO L226 Difference]: Without dead ends: 4462 [2018-11-07 08:30:39,699 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:30:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2018-11-07 08:30:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4307. [2018-11-07 08:30:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2018-11-07 08:30:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5763 transitions. [2018-11-07 08:30:39,858 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5763 transitions. Word has length 136 [2018-11-07 08:30:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:30:39,859 INFO L480 AbstractCegarLoop]: Abstraction has 4307 states and 5763 transitions. [2018-11-07 08:30:39,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:30:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5763 transitions. [2018-11-07 08:30:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-07 08:30:39,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:30:39,870 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:30:39,870 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:30:39,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1736454008, now seen corresponding path program 1 times [2018-11-07 08:30:39,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:30:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:39,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:30:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:30:39,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:30:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:30:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:30:40,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:30:40,285 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:30:40,286 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-07 08:30:40,289 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:30:40,356 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:30:40,357 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:30:41,177 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:30:41,180 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 08:30:41,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:30:41,224 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:30:41,942 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 73.68% of their original sizes. [2018-11-07 08:30:41,942 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:30:42,195 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-11-07 08:30:42,196 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:30:42,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:30:42,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2018-11-07 08:30:42,197 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:30:42,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:30:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:30:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:30:42,199 INFO L87 Difference]: Start difference. First operand 4307 states and 5763 transitions. Second operand 6 states. [2018-11-07 08:31:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:07,688 INFO L93 Difference]: Finished difference Result 8800 states and 11737 transitions. [2018-11-07 08:31:07,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:31:07,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 210 [2018-11-07 08:31:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:07,717 INFO L225 Difference]: With dead ends: 8800 [2018-11-07 08:31:07,718 INFO L226 Difference]: Without dead ends: 4499 [2018-11-07 08:31:07,735 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 210 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:31:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4499 states. [2018-11-07 08:31:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4499 to 4497. [2018-11-07 08:31:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4497 states. [2018-11-07 08:31:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 5963 transitions. [2018-11-07 08:31:07,855 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 5963 transitions. Word has length 210 [2018-11-07 08:31:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:07,856 INFO L480 AbstractCegarLoop]: Abstraction has 4497 states and 5963 transitions. [2018-11-07 08:31:07,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:31:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 5963 transitions. [2018-11-07 08:31:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-11-07 08:31:07,866 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:07,866 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:31:07,867 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:07,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:07,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1439039131, now seen corresponding path program 1 times [2018-11-07 08:31:07,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:07,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:07,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:07,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:07,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 08:31:08,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:08,391 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:31:08,391 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2018-11-07 08:31:08,392 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:31:08,399 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:31:08,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:31:08,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:31:08,991 INFO L272 AbstractInterpreter]: Visited 126 different actions 495 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:31:09,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:09,020 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:31:09,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:09,020 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:31:09,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:09,039 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:31:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:09,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:31:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:09,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:31:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:10,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:31:10,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 08:31:10,328 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:31:10,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 08:31:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 08:31:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-07 08:31:10,330 INFO L87 Difference]: Start difference. First operand 4497 states and 5963 transitions. Second operand 10 states. [2018-11-07 08:31:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:28,821 INFO L93 Difference]: Finished difference Result 22651 states and 33172 transitions. [2018-11-07 08:31:28,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-07 08:31:28,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 253 [2018-11-07 08:31:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:28,923 INFO L225 Difference]: With dead ends: 22651 [2018-11-07 08:31:28,924 INFO L226 Difference]: Without dead ends: 18350 [2018-11-07 08:31:28,986 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 527 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=733, Invalid=3173, Unknown=0, NotChecked=0, Total=3906 [2018-11-07 08:31:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18350 states. [2018-11-07 08:31:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18350 to 17705. [2018-11-07 08:31:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17705 states. [2018-11-07 08:31:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 22713 transitions. [2018-11-07 08:31:29,477 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 22713 transitions. Word has length 253 [2018-11-07 08:31:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:29,478 INFO L480 AbstractCegarLoop]: Abstraction has 17705 states and 22713 transitions. [2018-11-07 08:31:29,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 08:31:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 22713 transitions. [2018-11-07 08:31:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-07 08:31:29,501 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:29,502 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:31:29,503 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:29,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1247546700, now seen corresponding path program 1 times [2018-11-07 08:31:29,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:29,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:29,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:29,508 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-07 08:31:29,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:31:29,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 08:31:29,812 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:31:29,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:31:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:31:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 08:31:29,814 INFO L87 Difference]: Start difference. First operand 17705 states and 22713 transitions. Second operand 3 states. [2018-11-07 08:31:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:32,029 INFO L93 Difference]: Finished difference Result 39433 states and 51760 transitions. [2018-11-07 08:31:32,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:31:32,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2018-11-07 08:31:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:32,126 INFO L225 Difference]: With dead ends: 39433 [2018-11-07 08:31:32,127 INFO L226 Difference]: Without dead ends: 22113 [2018-11-07 08:31:32,178 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 08:31:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22113 states. [2018-11-07 08:31:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22113 to 21908. [2018-11-07 08:31:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21908 states. [2018-11-07 08:31:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21908 states to 21908 states and 28110 transitions. [2018-11-07 08:31:32,658 INFO L78 Accepts]: Start accepts. Automaton has 21908 states and 28110 transitions. Word has length 295 [2018-11-07 08:31:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:32,659 INFO L480 AbstractCegarLoop]: Abstraction has 21908 states and 28110 transitions. [2018-11-07 08:31:32,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:31:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 21908 states and 28110 transitions. [2018-11-07 08:31:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-11-07 08:31:32,693 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:32,694 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:31:32,694 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:32,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash 407234496, now seen corresponding path program 1 times [2018-11-07 08:31:32,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:32,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:32,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:32,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:32,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:33,388 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 08:31:33,763 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 08:31:34,054 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-07 08:31:34,422 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 08:31:34,754 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 08:31:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 193 proven. 175 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:31:36,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:36,033 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:31:36,033 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 328 with the following transitions: [2018-11-07 08:31:36,034 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:31:36,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:31:36,039 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:31:37,566 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:31:37,566 INFO L272 AbstractInterpreter]: Visited 127 different actions 382 times. Merged at 8 different actions 25 times. Never widened. Found 5 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:31:37,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:37,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:31:37,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:37,605 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:31:37,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:37,619 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:31:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:37,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:31:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-07 08:31:38,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:31:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-07 08:31:38,690 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:31:38,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [19] total 21 [2018-11-07 08:31:38,690 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:31:38,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 08:31:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 08:31:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2018-11-07 08:31:38,692 INFO L87 Difference]: Start difference. First operand 21908 states and 28110 transitions. Second operand 3 states. [2018-11-07 08:31:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:42,090 INFO L93 Difference]: Finished difference Result 51665 states and 66710 transitions. [2018-11-07 08:31:42,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 08:31:42,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2018-11-07 08:31:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:42,239 INFO L225 Difference]: With dead ends: 51665 [2018-11-07 08:31:42,239 INFO L226 Difference]: Without dead ends: 31446 [2018-11-07 08:31:42,287 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 654 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2018-11-07 08:31:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31446 states. [2018-11-07 08:31:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31446 to 30013. [2018-11-07 08:31:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30013 states. [2018-11-07 08:31:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30013 states to 30013 states and 38458 transitions. [2018-11-07 08:31:42,914 INFO L78 Accepts]: Start accepts. Automaton has 30013 states and 38458 transitions. Word has length 327 [2018-11-07 08:31:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:42,915 INFO L480 AbstractCegarLoop]: Abstraction has 30013 states and 38458 transitions. [2018-11-07 08:31:42,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 08:31:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 30013 states and 38458 transitions. [2018-11-07 08:31:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-11-07 08:31:42,950 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:42,950 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:31:42,951 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:42,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash 735034412, now seen corresponding path program 1 times [2018-11-07 08:31:42,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:42,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:42,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:42,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:42,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:43,578 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 08:31:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:44,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:44,223 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:31:44,224 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 337 with the following transitions: [2018-11-07 08:31:44,224 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [873], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:31:44,229 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:31:44,229 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:31:44,756 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:31:44,757 INFO L272 AbstractInterpreter]: Visited 160 different actions 628 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:31:44,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:44,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:31:44,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:44,799 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:31:44,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:44,819 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:31:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:44,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:31:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:45,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:31:45,423 WARN L179 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 08:31:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:31:46,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:31:46,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2018-11-07 08:31:46,283 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:31:46,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 08:31:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 08:31:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-11-07 08:31:46,285 INFO L87 Difference]: Start difference. First operand 30013 states and 38458 transitions. Second operand 17 states. [2018-11-07 08:31:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:31:55,268 INFO L93 Difference]: Finished difference Result 59743 states and 80677 transitions. [2018-11-07 08:31:55,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-07 08:31:55,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 336 [2018-11-07 08:31:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:31:55,402 INFO L225 Difference]: With dead ends: 59743 [2018-11-07 08:31:55,402 INFO L226 Difference]: Without dead ends: 30117 [2018-11-07 08:31:55,474 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 681 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=775, Invalid=2305, Unknown=0, NotChecked=0, Total=3080 [2018-11-07 08:31:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30117 states. [2018-11-07 08:31:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30117 to 29503. [2018-11-07 08:31:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29503 states. [2018-11-07 08:31:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29503 states to 29503 states and 37632 transitions. [2018-11-07 08:31:56,155 INFO L78 Accepts]: Start accepts. Automaton has 29503 states and 37632 transitions. Word has length 336 [2018-11-07 08:31:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:31:56,156 INFO L480 AbstractCegarLoop]: Abstraction has 29503 states and 37632 transitions. [2018-11-07 08:31:56,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 08:31:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 29503 states and 37632 transitions. [2018-11-07 08:31:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-11-07 08:31:56,193 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:31:56,194 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:31:56,194 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:31:56,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash -214712118, now seen corresponding path program 1 times [2018-11-07 08:31:56,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:31:56,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:56,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:56,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:31:56,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:31:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 08:31:56,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:56,566 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:31:56,567 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 354 with the following transitions: [2018-11-07 08:31:56,567 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [645], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:31:56,570 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:31:56,570 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:31:57,111 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:31:57,111 INFO L272 AbstractInterpreter]: Visited 127 different actions 378 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:31:57,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:31:57,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:31:57,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:31:57,150 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:31:57,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:31:57,162 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:31:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:31:57,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:31:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 08:31:57,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:31:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 08:31:58,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:31:58,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 08:31:58,540 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:31:58,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:31:58,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:31:58,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:31:58,542 INFO L87 Difference]: Start difference. First operand 29503 states and 37632 transitions. Second operand 6 states. [2018-11-07 08:32:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:32:00,816 INFO L93 Difference]: Finished difference Result 55751 states and 72852 transitions. [2018-11-07 08:32:00,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 08:32:00,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 353 [2018-11-07 08:32:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:32:00,897 INFO L225 Difference]: With dead ends: 55751 [2018-11-07 08:32:00,897 INFO L226 Difference]: Without dead ends: 23347 [2018-11-07 08:32:00,956 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 707 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:32:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23347 states. [2018-11-07 08:32:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23347 to 20829. [2018-11-07 08:32:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20829 states. [2018-11-07 08:32:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20829 states to 20829 states and 24687 transitions. [2018-11-07 08:32:01,343 INFO L78 Accepts]: Start accepts. Automaton has 20829 states and 24687 transitions. Word has length 353 [2018-11-07 08:32:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:32:01,343 INFO L480 AbstractCegarLoop]: Abstraction has 20829 states and 24687 transitions. [2018-11-07 08:32:01,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:32:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20829 states and 24687 transitions. [2018-11-07 08:32:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-11-07 08:32:01,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:32:01,384 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:32:01,385 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:32:01,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:32:01,385 INFO L82 PathProgramCache]: Analyzing trace with hash 479556675, now seen corresponding path program 1 times [2018-11-07 08:32:01,385 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:32:01,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:32:01,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:32:01,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:32:01,386 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:32:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:32:02,052 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 08:32:02,293 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 08:32:02,551 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 08:32:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 120 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:32:03,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:32:03,124 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:32:03,124 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 358 with the following transitions: [2018-11-07 08:32:03,124 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:32:03,127 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:32:03,127 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:32:03,843 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:32:03,844 INFO L272 AbstractInterpreter]: Visited 127 different actions 379 times. Merged at 8 different actions 22 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 08:32:03,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:32:03,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:32:03,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:32:03,851 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:32:03,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:32:03,859 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:32:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:32:03,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:32:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 330 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 08:32:04,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:32:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 330 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 08:32:05,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:32:05,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 23 [2018-11-07 08:32:05,410 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:32:05,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 08:32:05,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 08:32:05,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2018-11-07 08:32:05,411 INFO L87 Difference]: Start difference. First operand 20829 states and 24687 transitions. Second operand 21 states. [2018-11-07 08:32:08,941 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-11-07 08:32:10,244 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2018-11-07 08:32:10,884 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-11-07 08:32:16,711 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2018-11-07 08:32:28,032 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-07 08:32:28,447 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2018-11-07 08:32:34,324 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-07 08:32:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:32:43,414 INFO L93 Difference]: Finished difference Result 61629 states and 83514 transitions. [2018-11-07 08:32:43,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-11-07 08:32:43,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 357 [2018-11-07 08:32:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:32:43,558 INFO L225 Difference]: With dead ends: 61629 [2018-11-07 08:32:43,558 INFO L226 Difference]: Without dead ends: 35543 [2018-11-07 08:32:43,645 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 805 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10036 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2930, Invalid=22510, Unknown=0, NotChecked=0, Total=25440 [2018-11-07 08:32:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35543 states. [2018-11-07 08:32:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35543 to 29830. [2018-11-07 08:32:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29830 states. [2018-11-07 08:32:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29830 states to 29830 states and 36078 transitions. [2018-11-07 08:32:44,513 INFO L78 Accepts]: Start accepts. Automaton has 29830 states and 36078 transitions. Word has length 357 [2018-11-07 08:32:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:32:44,514 INFO L480 AbstractCegarLoop]: Abstraction has 29830 states and 36078 transitions. [2018-11-07 08:32:44,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 08:32:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 29830 states and 36078 transitions. [2018-11-07 08:32:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-07 08:32:44,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:32:44,539 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:32:44,539 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:32:44,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:32:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1568936548, now seen corresponding path program 1 times [2018-11-07 08:32:44,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:32:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:32:44,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:32:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:32:44,540 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:32:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:32:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 250 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:32:45,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:32:45,399 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:32:45,400 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 369 with the following transitions: [2018-11-07 08:32:45,400 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:32:45,403 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:32:45,403 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:32:45,861 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:32:45,861 INFO L272 AbstractInterpreter]: Visited 127 different actions 500 times. Merged at 8 different actions 27 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:32:45,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:32:45,867 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:32:45,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:32:45,867 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:32:45,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:32:45,878 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:32:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:32:45,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:32:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 08:32:46,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:32:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 08:32:46,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:32:46,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 21 [2018-11-07 08:32:46,739 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:32:46,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 08:32:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 08:32:46,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-11-07 08:32:46,742 INFO L87 Difference]: Start difference. First operand 29830 states and 36078 transitions. Second operand 19 states. [2018-11-07 08:32:47,971 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2018-11-07 08:33:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:33:03,181 INFO L93 Difference]: Finished difference Result 72589 states and 113876 transitions. [2018-11-07 08:33:03,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-07 08:33:03,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 368 [2018-11-07 08:33:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:33:03,541 INFO L225 Difference]: With dead ends: 72589 [2018-11-07 08:33:03,542 INFO L226 Difference]: Without dead ends: 40111 [2018-11-07 08:33:03,762 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 792 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3591 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1773, Invalid=8529, Unknown=0, NotChecked=0, Total=10302 [2018-11-07 08:33:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40111 states. [2018-11-07 08:33:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40111 to 32551. [2018-11-07 08:33:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32551 states. [2018-11-07 08:33:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32551 states to 32551 states and 39030 transitions. [2018-11-07 08:33:05,527 INFO L78 Accepts]: Start accepts. Automaton has 32551 states and 39030 transitions. Word has length 368 [2018-11-07 08:33:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:33:05,528 INFO L480 AbstractCegarLoop]: Abstraction has 32551 states and 39030 transitions. [2018-11-07 08:33:05,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 08:33:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 32551 states and 39030 transitions. [2018-11-07 08:33:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2018-11-07 08:33:05,546 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:33:05,546 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:33:05,547 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:33:05,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:05,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1394619589, now seen corresponding path program 1 times [2018-11-07 08:33:05,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:33:05,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:05,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:05,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:05,548 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:33:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 154 proven. 206 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-11-07 08:33:06,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:06,322 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:33:06,322 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 402 with the following transitions: [2018-11-07 08:33:06,322 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [633], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:33:06,324 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:33:06,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:33:06,920 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:33:06,920 INFO L272 AbstractInterpreter]: Visited 142 different actions 560 times. Merged at 8 different actions 27 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:33:06,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:06,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:33:06,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:06,925 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 08:33:06,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:06,935 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:33:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:07,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:33:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 08:33:08,691 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:33:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 250 proven. 102 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 08:33:08,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:33:08,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2018-11-07 08:33:08,910 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:33:08,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 08:33:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 08:33:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2018-11-07 08:33:08,912 INFO L87 Difference]: Start difference. First operand 32551 states and 39030 transitions. Second operand 9 states. [2018-11-07 08:33:16,263 WARN L179 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-11-07 08:33:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:33:24,873 INFO L93 Difference]: Finished difference Result 84202 states and 106927 transitions. [2018-11-07 08:33:24,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 08:33:24,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 401 [2018-11-07 08:33:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:33:25,031 INFO L225 Difference]: With dead ends: 84202 [2018-11-07 08:33:25,031 INFO L226 Difference]: Without dead ends: 52039 [2018-11-07 08:33:25,106 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 811 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=168, Invalid=431, Unknown=1, NotChecked=0, Total=600 [2018-11-07 08:33:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52039 states. [2018-11-07 08:33:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52039 to 49846. [2018-11-07 08:33:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49846 states. [2018-11-07 08:33:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49846 states to 49846 states and 60106 transitions. [2018-11-07 08:33:26,257 INFO L78 Accepts]: Start accepts. Automaton has 49846 states and 60106 transitions. Word has length 401 [2018-11-07 08:33:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:33:26,258 INFO L480 AbstractCegarLoop]: Abstraction has 49846 states and 60106 transitions. [2018-11-07 08:33:26,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 08:33:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 49846 states and 60106 transitions. [2018-11-07 08:33:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-11-07 08:33:26,292 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:33:26,292 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:33:26,293 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:33:26,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1275299725, now seen corresponding path program 1 times [2018-11-07 08:33:26,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:33:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:26,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:26,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:26,294 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:33:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:27,005 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 08:33:27,304 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 08:33:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-07 08:33:27,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:27,742 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:33:27,742 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 407 with the following transitions: [2018-11-07 08:33:27,742 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [653], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:33:27,745 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:33:27,745 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:33:28,287 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:33:28,288 INFO L272 AbstractInterpreter]: Visited 142 different actions 560 times. Merged at 8 different actions 27 times. Never widened. Found 7 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:33:28,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:28,308 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:33:28,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:28,308 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 08:33:28,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:28,318 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:33:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:28,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:33:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 465 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:28,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:33:28,871 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-11-07 08:33:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 359 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:33:29,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:33:29,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2018-11-07 08:33:29,918 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:33:29,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 08:33:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 08:33:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-07 08:33:29,920 INFO L87 Difference]: Start difference. First operand 49846 states and 60106 transitions. Second operand 13 states. [2018-11-07 08:33:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:33:38,171 INFO L93 Difference]: Finished difference Result 107935 states and 133111 transitions. [2018-11-07 08:33:38,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 08:33:38,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 406 [2018-11-07 08:33:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:33:38,344 INFO L225 Difference]: With dead ends: 107935 [2018-11-07 08:33:38,344 INFO L226 Difference]: Without dead ends: 63254 [2018-11-07 08:33:38,427 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 818 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 08:33:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63254 states. [2018-11-07 08:33:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63254 to 60468. [2018-11-07 08:33:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60468 states. [2018-11-07 08:33:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60468 states to 60468 states and 74697 transitions. [2018-11-07 08:33:39,799 INFO L78 Accepts]: Start accepts. Automaton has 60468 states and 74697 transitions. Word has length 406 [2018-11-07 08:33:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:33:39,800 INFO L480 AbstractCegarLoop]: Abstraction has 60468 states and 74697 transitions. [2018-11-07 08:33:39,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 08:33:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 60468 states and 74697 transitions. [2018-11-07 08:33:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-11-07 08:33:39,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:33:39,847 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:33:39,847 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:33:39,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:39,848 INFO L82 PathProgramCache]: Analyzing trace with hash 303171955, now seen corresponding path program 1 times [2018-11-07 08:33:39,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:33:39,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:39,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:39,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:33:39,849 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:33:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 13 proven. 356 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 08:33:41,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:41,312 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:33:41,313 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 416 with the following transitions: [2018-11-07 08:33:41,313 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [784], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 08:33:41,315 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:33:41,315 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:33:41,820 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 08:33:41,820 INFO L272 AbstractInterpreter]: Visited 142 different actions 567 times. Merged at 8 different actions 34 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 08:33:41,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:33:41,827 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 08:33:41,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:33:41,827 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 08:33:41,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:33:41,836 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 08:33:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:33:41,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 08:33:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 365 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 08:33:42,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 08:33:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 146 proven. 223 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 08:33:43,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 08:33:43,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 29 [2018-11-07 08:33:43,120 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 08:33:43,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-07 08:33:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-07 08:33:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2018-11-07 08:33:43,123 INFO L87 Difference]: Start difference. First operand 60468 states and 74697 transitions. Second operand 24 states. [2018-11-07 08:33:43,747 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2018-11-07 08:33:45,477 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2018-11-07 08:33:46,104 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 Received shutdown request... [2018-11-07 08:33:49,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-07 08:33:49,357 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 08:33:49,362 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 08:33:49,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:33:49 BoogieIcfgContainer [2018-11-07 08:33:49,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 08:33:49,363 INFO L168 Benchmark]: Toolchain (without parser) took 210050.36 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-07 08:33:49,365 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 08:33:49,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 990.45 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 08:33:49,366 INFO L168 Benchmark]: Boogie Procedure Inliner took 159.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -864.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 08:33:49,367 INFO L168 Benchmark]: Boogie Preprocessor took 139.85 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 08:33:49,367 INFO L168 Benchmark]: RCFGBuilder took 5041.61 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: 184.6 MB). Peak memory consumption was 184.6 MB. Max. memory is 7.1 GB. [2018-11-07 08:33:49,368 INFO L168 Benchmark]: TraceAbstraction took 203712.64 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -551.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-11-07 08:33:49,372 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 990.45 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 159.70 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -864.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.85 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5041.61 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: 184.6 MB). Peak memory consumption was 184.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203712.64 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -551.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 150). Cancelled while BasicCegarLoop was constructing difference of abstraction (60468states) and FLOYD_HOARE automaton (currently 42 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (4267 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 203.6s OverallTime, 14 OverallIterations, 4 TraceHistogramMax, 160.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3065 SDtfs, 41864 SDslu, 5613 SDs, 0 SdLazy, 64378 SolverSat, 14602 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 103.7s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 7392 GetRequests, 6834 SyntacticMatches, 20 SemanticMatches, 538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17324 ImplicationChecksByTransitivity, 35.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60468occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.1s AbstIntTime, 10 AbstIntIterations, 1 AbstIntStrong, 0.9977321801006012 AbsIntWeakeningRatio, 0.1339712918660287 AbsIntAvgWeakeningVarsNumRemoved, 18.272727272727273 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 8.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 23839 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 21.9s InterpolantComputationTime, 7257 NumberOfCodeBlocks, 7257 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 10441 ConstructedInterpolants, 54 QuantifiedInterpolants, 22819217 SizeOfPredicates, 15 NumberOfNonLiveVariables, 5370 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 32 InterpolantComputations, 6 PerfectInterpolantSequences, 8894/10727 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown