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/Problem03_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 07:11:07,423 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 07:11:07,425 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 07:11:07,440 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 07:11:07,440 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 07:11:07,441 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 07:11:07,442 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 07:11:07,444 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 07:11:07,446 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 07:11:07,447 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 07:11:07,448 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 07:11:07,448 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 07:11:07,449 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 07:11:07,450 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 07:11:07,451 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 07:11:07,452 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 07:11:07,453 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 07:11:07,454 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 07:11:07,456 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 07:11:07,458 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 07:11:07,459 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 07:11:07,460 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 07:11:07,463 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 07:11:07,463 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 07:11:07,463 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 07:11:07,464 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 07:11:07,465 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 07:11:07,466 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 07:11:07,467 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 07:11:07,468 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 07:11:07,468 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 07:11:07,469 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 07:11:07,469 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 07:11:07,470 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 07:11:07,471 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 07:11:07,471 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 07:11:07,472 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 07:11:07,488 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 07:11:07,488 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 07:11:07,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 07:11:07,490 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 07:11:07,490 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 07:11:07,491 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 07:11:07,491 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 07:11:07,491 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 07:11:07,492 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 07:11:07,492 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 07:11:07,492 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 07:11:07,492 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 07:11:07,492 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 07:11:07,492 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 07:11:07,493 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 07:11:07,493 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 07:11:07,494 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 07:11:07,494 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 07:11:07,495 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 07:11:07,495 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 07:11:07,495 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 07:11:07,495 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 07:11:07,495 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 07:11:07,496 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 07:11:07,496 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 07:11:07,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 07:11:07,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:11:07,497 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 07:11:07,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 07:11:07,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 07:11:07,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 07:11:07,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 07:11:07,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 07:11:07,498 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 07:11:07,498 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 07:11:07,498 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 07:11:07,553 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 07:11:07,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 07:11:07,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 07:11:07,575 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 07:11:07,576 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 07:11:07,577 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-11-07 07:11:07,636 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7eb0807d/09b5bed7aaff4763ae0c71f025d5d1cc/FLAGd0128b2e2 [2018-11-07 07:11:08,393 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 07:11:08,394 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label12_true-unreach-call.c [2018-11-07 07:11:08,411 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7eb0807d/09b5bed7aaff4763ae0c71f025d5d1cc/FLAGd0128b2e2 [2018-11-07 07:11:08,425 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7eb0807d/09b5bed7aaff4763ae0c71f025d5d1cc [2018-11-07 07:11:08,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 07:11:08,437 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 07:11:08,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 07:11:08,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 07:11:08,442 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 07:11:08,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:11:08" (1/1) ... [2018-11-07 07:11:08,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cedeeed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:08, skipping insertion in model container [2018-11-07 07:11:08,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:11:08" (1/1) ... [2018-11-07 07:11:08,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 07:11:08,542 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 07:11:09,246 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:11:09,252 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 07:11:09,589 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:11:09,614 INFO L193 MainTranslator]: Completed translation [2018-11-07 07:11:09,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09 WrapperNode [2018-11-07 07:11:09,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 07:11:09,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 07:11:09,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 07:11:09,616 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 07:11:09,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 07:11:09,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 07:11:09,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 07:11:09,834 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 07:11:09,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (1/1) ... [2018-11-07 07:11:09,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 07:11:09,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 07:11:09,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 07:11:09,969 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 07:11:09,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (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 07:11:10,034 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 07:11:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 07:11:10,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 07:11:10,035 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 07:11:10,035 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 07:11:10,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 07:11:10,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 07:11:10,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 07:11:10,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 07:11:15,311 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 07:11:15,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:11:15 BoogieIcfgContainer [2018-11-07 07:11:15,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 07:11:15,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 07:11:15,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 07:11:15,318 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 07:11:15,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:11:08" (1/3) ... [2018-11-07 07:11:15,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e66295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:11:15, skipping insertion in model container [2018-11-07 07:11:15,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:11:09" (2/3) ... [2018-11-07 07:11:15,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e66295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:11:15, skipping insertion in model container [2018-11-07 07:11:15,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:11:15" (3/3) ... [2018-11-07 07:11:15,323 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label12_true-unreach-call.c [2018-11-07 07:11:15,334 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 07:11:15,345 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 07:11:15,364 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 07:11:15,406 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 07:11:15,407 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 07:11:15,407 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 07:11:15,407 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 07:11:15,407 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 07:11:15,407 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 07:11:15,407 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 07:11:15,408 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 07:11:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 07:11:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-07 07:11:15,460 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:15,462 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:15,469 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:15,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash -927745007, now seen corresponding path program 1 times [2018-11-07 07:11:15,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:15,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:15,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:15,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:15,542 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:16,362 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:11:16,562 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 07:11:16,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:11:16,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:11:16,565 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:16,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:11:16,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:11:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:11:16,593 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 07:11:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:18,607 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-11-07 07:11:18,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:11:18,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-11-07 07:11:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:18,632 INFO L225 Difference]: With dead ends: 845 [2018-11-07 07:11:18,632 INFO L226 Difference]: Without dead ends: 531 [2018-11-07 07:11:18,647 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:11:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-11-07 07:11:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-11-07 07:11:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-11-07 07:11:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-11-07 07:11:18,779 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 170 [2018-11-07 07:11:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:18,781 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-11-07 07:11:18,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:11:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-11-07 07:11:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-07 07:11:18,798 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:18,798 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:18,799 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:18,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:18,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1807947448, now seen corresponding path program 1 times [2018-11-07 07:11:18,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:18,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:18,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:18,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:18,804 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:19,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:11:19,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 07:11:19,186 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:19,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:11:19,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:11:19,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 07:11:19,189 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-11-07 07:11:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:22,862 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-11-07 07:11:22,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 07:11:22,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-11-07 07:11:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:22,877 INFO L225 Difference]: With dead ends: 1599 [2018-11-07 07:11:22,877 INFO L226 Difference]: Without dead ends: 1075 [2018-11-07 07:11:22,880 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:11:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-11-07 07:11:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-11-07 07:11:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-11-07 07:11:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-11-07 07:11:22,946 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 180 [2018-11-07 07:11:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:22,947 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-11-07 07:11:22,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:11:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-11-07 07:11:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-07 07:11:22,951 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:22,952 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:22,952 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:22,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash 479453333, now seen corresponding path program 1 times [2018-11-07 07:11:22,953 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:22,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:22,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:22,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:22,954 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:23,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:11:23,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:11:23,268 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:23,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:11:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:11:23,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:11:23,270 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-11-07 07:11:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:25,831 INFO L93 Difference]: Finished difference Result 2912 states and 4936 transitions. [2018-11-07 07:11:25,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:11:25,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2018-11-07 07:11:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:25,853 INFO L225 Difference]: With dead ends: 2912 [2018-11-07 07:11:25,853 INFO L226 Difference]: Without dead ends: 1884 [2018-11-07 07:11:25,858 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 07:11:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-11-07 07:11:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1881. [2018-11-07 07:11:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1881 states. [2018-11-07 07:11:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2981 transitions. [2018-11-07 07:11:25,939 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2981 transitions. Word has length 183 [2018-11-07 07:11:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:25,941 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 2981 transitions. [2018-11-07 07:11:25,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:11:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2981 transitions. [2018-11-07 07:11:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-07 07:11:25,949 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:25,950 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:25,950 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:25,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1957803305, now seen corresponding path program 1 times [2018-11-07 07:11:25,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:25,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:25,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:25,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:25,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:26,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:11:26,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 07:11:26,221 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:26,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 07:11:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 07:11:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:26,222 INFO L87 Difference]: Start difference. First operand 1881 states and 2981 transitions. Second operand 7 states. [2018-11-07 07:11:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:28,745 INFO L93 Difference]: Finished difference Result 5729 states and 9791 transitions. [2018-11-07 07:11:28,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 07:11:28,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2018-11-07 07:11:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:28,787 INFO L225 Difference]: With dead ends: 5729 [2018-11-07 07:11:28,787 INFO L226 Difference]: Without dead ends: 3854 [2018-11-07 07:11:28,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:11:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2018-11-07 07:11:29,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3744. [2018-11-07 07:11:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3744 states. [2018-11-07 07:11:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 6108 transitions. [2018-11-07 07:11:29,021 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 6108 transitions. Word has length 189 [2018-11-07 07:11:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:29,021 INFO L480 AbstractCegarLoop]: Abstraction has 3744 states and 6108 transitions. [2018-11-07 07:11:29,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 07:11:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 6108 transitions. [2018-11-07 07:11:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-07 07:11:29,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:29,035 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:29,035 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:29,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash -551348028, now seen corresponding path program 1 times [2018-11-07 07:11:29,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:29,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:29,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:29,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:29,037 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:29,280 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:11:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:29,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:11:29,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 07:11:29,450 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:29,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:11:29,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:11:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 07:11:29,452 INFO L87 Difference]: Start difference. First operand 3744 states and 6108 transitions. Second operand 6 states. [2018-11-07 07:11:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:31,750 INFO L93 Difference]: Finished difference Result 8125 states and 13602 transitions. [2018-11-07 07:11:31,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 07:11:31,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2018-11-07 07:11:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:31,783 INFO L225 Difference]: With dead ends: 8125 [2018-11-07 07:11:31,783 INFO L226 Difference]: Without dead ends: 4387 [2018-11-07 07:11:31,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:11:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2018-11-07 07:11:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4215. [2018-11-07 07:11:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2018-11-07 07:11:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 6296 transitions. [2018-11-07 07:11:31,929 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 6296 transitions. Word has length 190 [2018-11-07 07:11:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:31,929 INFO L480 AbstractCegarLoop]: Abstraction has 4215 states and 6296 transitions. [2018-11-07 07:11:31,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:11:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 6296 transitions. [2018-11-07 07:11:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-07 07:11:31,941 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:31,941 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:31,942 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:31,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:31,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1721729602, now seen corresponding path program 1 times [2018-11-07 07:11:31,942 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:31,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:31,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:31,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:31,944 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:32,202 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:11:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:32,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:32,398 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:32,399 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-11-07 07:11:32,409 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:32,510 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:32,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:33,749 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:11:33,751 INFO L272 AbstractInterpreter]: Visited 171 different actions 171 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 07:11:33,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:33,803 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:11:34,709 INFO L227 lantSequenceWeakener]: Weakened 183 states. On average, predicates are now at 71.86% of their original sizes. [2018-11-07 07:11:34,710 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:11:35,739 INFO L415 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2018-11-07 07:11:35,740 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:11:35,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:35,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [5] total 20 [2018-11-07 07:11:35,742 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:35,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 07:11:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 07:11:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-07 07:11:35,744 INFO L87 Difference]: Start difference. First operand 4215 states and 6296 transitions. Second operand 17 states. [2018-11-07 07:11:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:53,589 INFO L93 Difference]: Finished difference Result 8634 states and 12893 transitions. [2018-11-07 07:11:53,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:11:53,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 194 [2018-11-07 07:11:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:53,610 INFO L225 Difference]: With dead ends: 8634 [2018-11-07 07:11:53,610 INFO L226 Difference]: Without dead ends: 4425 [2018-11-07 07:11:53,622 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2018-11-07 07:11:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2018-11-07 07:11:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 4423. [2018-11-07 07:11:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4423 states. [2018-11-07 07:11:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6513 transitions. [2018-11-07 07:11:53,750 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6513 transitions. Word has length 194 [2018-11-07 07:11:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:53,750 INFO L480 AbstractCegarLoop]: Abstraction has 4423 states and 6513 transitions. [2018-11-07 07:11:53,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 07:11:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6513 transitions. [2018-11-07 07:11:53,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-11-07 07:11:53,763 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:53,763 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:53,764 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:53,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1815420179, now seen corresponding path program 1 times [2018-11-07 07:11:53,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:53,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:53,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:53,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:53,766 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:54,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:54,108 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:54,108 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 204 with the following transitions: [2018-11-07 07:11:54,109 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:54,121 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:54,121 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:54,984 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:11:54,984 INFO L272 AbstractInterpreter]: Visited 176 different actions 343 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:11:55,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:55,022 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:11:55,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:55,022 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 07:11:55,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:55,041 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:11:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:55,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:11:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:11:55,411 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:11:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:11:55,585 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:55,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-11-07 07:11:55,585 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:55,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:11:55,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:11:55,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:55,586 INFO L87 Difference]: Start difference. First operand 4423 states and 6513 transitions. Second operand 3 states. [2018-11-07 07:11:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:56,752 INFO L93 Difference]: Finished difference Result 8630 states and 12805 transitions. [2018-11-07 07:11:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:11:56,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2018-11-07 07:11:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:56,779 INFO L225 Difference]: With dead ends: 8630 [2018-11-07 07:11:56,780 INFO L226 Difference]: Without dead ends: 4421 [2018-11-07 07:11:56,791 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2018-11-07 07:11:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4421. [2018-11-07 07:11:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4421 states. [2018-11-07 07:11:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6509 transitions. [2018-11-07 07:11:56,914 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6509 transitions. Word has length 203 [2018-11-07 07:11:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:56,914 INFO L480 AbstractCegarLoop]: Abstraction has 4421 states and 6509 transitions. [2018-11-07 07:11:56,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:11:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6509 transitions. [2018-11-07 07:11:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-07 07:11:56,927 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:56,928 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:56,928 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:56,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:56,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1185740873, now seen corresponding path program 1 times [2018-11-07 07:11:56,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:56,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:56,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:56,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:56,931 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:57,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:57,414 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:57,415 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-07 07:11:57,415 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:57,423 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:57,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:58,109 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:11:58,109 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:11:58,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:58,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:11:58,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:58,115 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 07:11:58,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:58,378 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:11:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:58,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:11:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 07:11:58,729 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:11:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 07:11:59,182 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:59,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:11:59,183 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:59,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:11:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:11:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:59,184 INFO L87 Difference]: Start difference. First operand 4421 states and 6509 transitions. Second operand 3 states. [2018-11-07 07:12:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:02,098 INFO L93 Difference]: Finished difference Result 12525 states and 19198 transitions. [2018-11-07 07:12:02,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:12:02,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-11-07 07:12:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:02,150 INFO L225 Difference]: With dead ends: 12525 [2018-11-07 07:12:02,157 INFO L226 Difference]: Without dead ends: 8318 [2018-11-07 07:12:02,173 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:12:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2018-11-07 07:12:02,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 8173. [2018-11-07 07:12:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8173 states. [2018-11-07 07:12:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8173 states to 8173 states and 12228 transitions. [2018-11-07 07:12:02,423 INFO L78 Accepts]: Start accepts. Automaton has 8173 states and 12228 transitions. Word has length 210 [2018-11-07 07:12:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:02,424 INFO L480 AbstractCegarLoop]: Abstraction has 8173 states and 12228 transitions. [2018-11-07 07:12:02,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:12:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8173 states and 12228 transitions. [2018-11-07 07:12:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-07 07:12:02,448 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:02,448 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:12:02,449 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:02,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1505272723, now seen corresponding path program 1 times [2018-11-07 07:12:02,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:02,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:02,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:02,451 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:02,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:02,919 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:02,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 213 with the following transitions: [2018-11-07 07:12:02,920 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:02,927 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:02,928 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:04,586 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:04,586 INFO L272 AbstractInterpreter]: Visited 175 different actions 521 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:12:04,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:04,624 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:04,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:04,624 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 07:12:04,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:04,638 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:04,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:05,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:05,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:12:05,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-07 07:12:05,507 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:12:05,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:12:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:12:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-07 07:12:05,508 INFO L87 Difference]: Start difference. First operand 8173 states and 12228 transitions. Second operand 9 states. [2018-11-07 07:12:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:18,464 INFO L93 Difference]: Finished difference Result 66256 states and 136601 transitions. [2018-11-07 07:12:18,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-07 07:12:18,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2018-11-07 07:12:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:18,955 INFO L225 Difference]: With dead ends: 66256 [2018-11-07 07:12:18,956 INFO L226 Difference]: Without dead ends: 58297 [2018-11-07 07:12:19,164 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 07:12:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58297 states. [2018-11-07 07:12:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58297 to 55365. [2018-11-07 07:12:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55365 states. [2018-11-07 07:12:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55365 states to 55365 states and 79260 transitions. [2018-11-07 07:12:21,957 INFO L78 Accepts]: Start accepts. Automaton has 55365 states and 79260 transitions. Word has length 212 [2018-11-07 07:12:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:21,958 INFO L480 AbstractCegarLoop]: Abstraction has 55365 states and 79260 transitions. [2018-11-07 07:12:21,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:12:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 55365 states and 79260 transitions. [2018-11-07 07:12:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-07 07:12:22,089 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:22,090 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:12:22,090 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:22,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2036604121, now seen corresponding path program 1 times [2018-11-07 07:12:22,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:22,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:22,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:22,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:22,092 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:22,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:22,636 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:22,636 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-11-07 07:12:22,637 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [147], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:22,644 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:22,644 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:23,678 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:23,678 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:12:23,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:23,714 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:23,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:23,714 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 07:12:23,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:23,730 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:23,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:12:24,078 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:12:24,475 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:12:24,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-07 07:12:24,475 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:12:24,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:12:24,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:12:24,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 07:12:24,476 INFO L87 Difference]: Start difference. First operand 55365 states and 79260 transitions. Second operand 3 states. [2018-11-07 07:12:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:26,412 INFO L93 Difference]: Finished difference Result 107961 states and 153617 transitions. [2018-11-07 07:12:26,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:12:26,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2018-11-07 07:12:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:26,675 INFO L225 Difference]: With dead ends: 107961 [2018-11-07 07:12:26,675 INFO L226 Difference]: Without dead ends: 66183 [2018-11-07 07:12:26,776 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 07:12:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66183 states. [2018-11-07 07:12:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66183 to 64658. [2018-11-07 07:12:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64658 states. [2018-11-07 07:12:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64658 states to 64658 states and 92068 transitions. [2018-11-07 07:12:29,107 INFO L78 Accepts]: Start accepts. Automaton has 64658 states and 92068 transitions. Word has length 233 [2018-11-07 07:12:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:29,107 INFO L480 AbstractCegarLoop]: Abstraction has 64658 states and 92068 transitions. [2018-11-07 07:12:29,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:12:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 64658 states and 92068 transitions. [2018-11-07 07:12:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-11-07 07:12:29,206 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:29,206 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:29,207 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:29,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:29,207 INFO L82 PathProgramCache]: Analyzing trace with hash 744626209, now seen corresponding path program 1 times [2018-11-07 07:12:29,207 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:29,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:29,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:29,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:29,209 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:29,557 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:12:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:12:30,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:30,033 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:30,033 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 247 with the following transitions: [2018-11-07 07:12:30,034 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:30,042 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:30,042 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:30,924 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:12:30,925 INFO L272 AbstractInterpreter]: Visited 174 different actions 342 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:12:30,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:30,959 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:12:31,735 INFO L227 lantSequenceWeakener]: Weakened 243 states. On average, predicates are now at 71.88% of their original sizes. [2018-11-07 07:12:31,735 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:12:32,054 INFO L415 sIntCurrentIteration]: We unified 245 AI predicates to 245 [2018-11-07 07:12:32,054 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:12:32,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:12:32,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 07:12:32,055 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:12:32,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 07:12:32,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 07:12:32,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-11-07 07:12:32,057 INFO L87 Difference]: Start difference. First operand 64658 states and 92068 transitions. Second operand 20 states. [2018-11-07 07:12:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:57,730 INFO L93 Difference]: Finished difference Result 129271 states and 183818 transitions. [2018-11-07 07:12:57,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 07:12:57,730 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 246 [2018-11-07 07:12:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:58,010 INFO L225 Difference]: With dead ends: 129271 [2018-11-07 07:12:58,010 INFO L226 Difference]: Without dead ends: 64832 [2018-11-07 07:12:58,140 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 254 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2018-11-07 07:12:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64832 states. [2018-11-07 07:13:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64832 to 64829. [2018-11-07 07:13:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64829 states. [2018-11-07 07:13:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64829 states to 64829 states and 91927 transitions. [2018-11-07 07:13:00,324 INFO L78 Accepts]: Start accepts. Automaton has 64829 states and 91927 transitions. Word has length 246 [2018-11-07 07:13:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:00,325 INFO L480 AbstractCegarLoop]: Abstraction has 64829 states and 91927 transitions. [2018-11-07 07:13:00,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 07:13:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 64829 states and 91927 transitions. [2018-11-07 07:13:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-07 07:13:00,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:00,380 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:13:00,381 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:00,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:00,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1403817372, now seen corresponding path program 1 times [2018-11-07 07:13:00,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:00,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:00,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:00,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:00,382 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:00,964 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 07:13:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:01,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:01,198 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:01,198 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-07 07:13:01,199 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:01,206 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:01,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:01,802 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:13:01,803 INFO L272 AbstractInterpreter]: Visited 175 different actions 348 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:13:01,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:01,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:13:01,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:01,812 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 07:13:01,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:01,821 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:13:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:02,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:13:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:02,452 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:13:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:02,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:13:02,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 07:13:02,794 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:13:02,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:13:02,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:13:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:13:02,795 INFO L87 Difference]: Start difference. First operand 64829 states and 91927 transitions. Second operand 12 states. [2018-11-07 07:13:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:18,050 INFO L93 Difference]: Finished difference Result 227696 states and 342127 transitions. [2018-11-07 07:13:18,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-11-07 07:13:18,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 251 [2018-11-07 07:13:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:18,682 INFO L225 Difference]: With dead ends: 227696 [2018-11-07 07:13:18,682 INFO L226 Difference]: Without dead ends: 163290 [2018-11-07 07:13:18,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3664 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1514, Invalid=8386, Unknown=0, NotChecked=0, Total=9900 [2018-11-07 07:13:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163290 states. [2018-11-07 07:13:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163290 to 160370. [2018-11-07 07:13:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160370 states. [2018-11-07 07:13:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160370 states to 160370 states and 210651 transitions. [2018-11-07 07:13:22,748 INFO L78 Accepts]: Start accepts. Automaton has 160370 states and 210651 transitions. Word has length 251 [2018-11-07 07:13:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:22,749 INFO L480 AbstractCegarLoop]: Abstraction has 160370 states and 210651 transitions. [2018-11-07 07:13:22,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:13:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 160370 states and 210651 transitions. [2018-11-07 07:13:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-11-07 07:13:22,873 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:22,874 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:13:22,874 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:22,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1697646380, now seen corresponding path program 1 times [2018-11-07 07:13:22,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:22,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:22,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:22,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:22,876 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:23,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:23,501 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:23,502 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 291 with the following transitions: [2018-11-07 07:13:23,502 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [409], [412], [416], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:23,508 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:23,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:24,416 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:13:24,416 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:13:24,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:24,422 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:13:24,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:24,422 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 07:13:28,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:28,087 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:13:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:28,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:13:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:28,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:13:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:29,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:13:29,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-07 07:13:29,198 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:13:29,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:13:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:13:29,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:13:29,199 INFO L87 Difference]: Start difference. First operand 160370 states and 210651 transitions. Second operand 6 states. [2018-11-07 07:13:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:31,963 INFO L93 Difference]: Finished difference Result 298446 states and 392159 transitions. [2018-11-07 07:13:31,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 07:13:31,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-11-07 07:13:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:32,524 INFO L225 Difference]: With dead ends: 298446 [2018-11-07 07:13:32,525 INFO L226 Difference]: Without dead ends: 147886 [2018-11-07 07:13:32,760 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 579 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-07 07:13:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147886 states. [2018-11-07 07:13:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147886 to 147151. [2018-11-07 07:13:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147151 states. [2018-11-07 07:13:35,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147151 states to 147151 states and 189582 transitions. [2018-11-07 07:13:35,609 INFO L78 Accepts]: Start accepts. Automaton has 147151 states and 189582 transitions. Word has length 290 [2018-11-07 07:13:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:35,610 INFO L480 AbstractCegarLoop]: Abstraction has 147151 states and 189582 transitions. [2018-11-07 07:13:35,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:13:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 147151 states and 189582 transitions. [2018-11-07 07:13:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-11-07 07:13:35,674 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:35,675 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:35,675 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:35,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash -794164287, now seen corresponding path program 1 times [2018-11-07 07:13:35,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:35,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:35,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:35,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:35,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:36,258 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 07:13:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:13:36,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:36,515 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:36,516 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 310 with the following transitions: [2018-11-07 07:13:36,516 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:36,521 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:36,522 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:38,202 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:13:38,202 INFO L272 AbstractInterpreter]: Visited 176 different actions 520 times. Merged at 7 different actions 15 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:13:38,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:38,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:13:38,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:38,211 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 07:13:38,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:38,221 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:13:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:38,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:13:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-07 07:13:38,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:13:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 153 proven. 38 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:13:38,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:13:38,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-11-07 07:13:38,899 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:13:38,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 07:13:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 07:13:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-07 07:13:38,900 INFO L87 Difference]: Start difference. First operand 147151 states and 189582 transitions. Second operand 10 states. [2018-11-07 07:13:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:46,765 INFO L93 Difference]: Finished difference Result 263169 states and 349339 transitions. [2018-11-07 07:13:46,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 07:13:46,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2018-11-07 07:13:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:47,265 INFO L225 Difference]: With dead ends: 263169 [2018-11-07 07:13:47,265 INFO L226 Difference]: Without dead ends: 155855 [2018-11-07 07:13:47,414 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2018-11-07 07:13:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155855 states. [2018-11-07 07:13:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155855 to 153601. [2018-11-07 07:13:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153601 states. [2018-11-07 07:13:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153601 states to 153601 states and 192188 transitions. [2018-11-07 07:13:50,798 INFO L78 Accepts]: Start accepts. Automaton has 153601 states and 192188 transitions. Word has length 309 [2018-11-07 07:13:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:50,799 INFO L480 AbstractCegarLoop]: Abstraction has 153601 states and 192188 transitions. [2018-11-07 07:13:50,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 07:13:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 153601 states and 192188 transitions. [2018-11-07 07:13:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-11-07 07:13:50,867 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:50,867 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:13:50,868 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:50,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1393916116, now seen corresponding path program 1 times [2018-11-07 07:13:50,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:50,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:50,869 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:51,487 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 07:13:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:13:51,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:51,696 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:51,696 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 320 with the following transitions: [2018-11-07 07:13:51,697 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:51,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:51,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:52,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:13:52,230 INFO L272 AbstractInterpreter]: Visited 175 different actions 342 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:13:52,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:52,240 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:13:52,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:52,240 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 07:13:52,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:52,251 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:13:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:52,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:13:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-07 07:13:52,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:13:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-07 07:13:52,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 07:13:52,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-11-07 07:13:52,838 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:13:52,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 07:13:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 07:13:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-07 07:13:52,839 INFO L87 Difference]: Start difference. First operand 153601 states and 192188 transitions. Second operand 5 states. [2018-11-07 07:13:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:56,843 INFO L93 Difference]: Finished difference Result 300727 states and 377517 transitions. [2018-11-07 07:13:56,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:13:56,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2018-11-07 07:13:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:57,309 INFO L225 Difference]: With dead ends: 300727 [2018-11-07 07:13:57,309 INFO L226 Difference]: Without dead ends: 154176 [2018-11-07 07:13:57,517 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 635 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-07 07:13:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154176 states. [2018-11-07 07:14:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154176 to 151770. [2018-11-07 07:14:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151770 states. [2018-11-07 07:14:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151770 states to 151770 states and 188340 transitions. [2018-11-07 07:14:00,977 INFO L78 Accepts]: Start accepts. Automaton has 151770 states and 188340 transitions. Word has length 319 [2018-11-07 07:14:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:14:00,977 INFO L480 AbstractCegarLoop]: Abstraction has 151770 states and 188340 transitions. [2018-11-07 07:14:00,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 07:14:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 151770 states and 188340 transitions. [2018-11-07 07:14:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-11-07 07:14:01,068 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:14:01,069 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:14:01,069 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:14:01,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1746104119, now seen corresponding path program 1 times [2018-11-07 07:14:01,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:14:01,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:01,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:01,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:01,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:14:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:01,730 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 07:14:01,982 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 07:14:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-07 07:14:02,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:02,339 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:14:02,339 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 332 with the following transitions: [2018-11-07 07:14:02,339 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:14:02,346 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:14:02,346 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:14:03,235 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:14:03,235 INFO L272 AbstractInterpreter]: Visited 176 different actions 527 times. Merged at 8 different actions 23 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:14:03,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:03,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:14:03,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:03,244 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 07:14:03,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:03,252 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:14:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:03,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:14:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 90 proven. 108 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-07 07:14:03,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:14:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-07 07:14:03,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:14:03,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2018-11-07 07:14:03,782 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:14:03,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:14:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:14:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:14:03,784 INFO L87 Difference]: Start difference. First operand 151770 states and 188340 transitions. Second operand 9 states. [2018-11-07 07:14:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:14:13,229 INFO L93 Difference]: Finished difference Result 340013 states and 440127 transitions. [2018-11-07 07:14:13,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-07 07:14:13,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 331 [2018-11-07 07:14:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:14:13,788 INFO L225 Difference]: With dead ends: 340013 [2018-11-07 07:14:13,788 INFO L226 Difference]: Without dead ends: 190055 [2018-11-07 07:14:13,962 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2018-11-07 07:14:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190055 states. [2018-11-07 07:14:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190055 to 185674. [2018-11-07 07:14:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185674 states. [2018-11-07 07:14:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185674 states to 185674 states and 229561 transitions. [2018-11-07 07:14:18,232 INFO L78 Accepts]: Start accepts. Automaton has 185674 states and 229561 transitions. Word has length 331 [2018-11-07 07:14:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:14:18,233 INFO L480 AbstractCegarLoop]: Abstraction has 185674 states and 229561 transitions. [2018-11-07 07:14:18,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:14:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 185674 states and 229561 transitions. [2018-11-07 07:14:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-07 07:14:18,345 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:14:18,346 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:14:18,346 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:14:18,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:18,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1546926298, now seen corresponding path program 1 times [2018-11-07 07:14:18,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:14:18,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:18,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:18,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:18,347 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:14:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 211 proven. 30 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 07:14:18,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:18,752 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:14:18,752 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 369 with the following transitions: [2018-11-07 07:14:18,753 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [821], [823], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:14:18,757 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:14:18,757 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:14:19,320 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:14:19,320 INFO L272 AbstractInterpreter]: Visited 177 different actions 346 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:14:19,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:19,327 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:14:19,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:19,327 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:14:19,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:19,336 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:14:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:19,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:14:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 108 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-07 07:14:19,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:14:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-07 07:14:20,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:14:20,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-11-07 07:14:20,029 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:14:20,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:14:20,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:14:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:14:20,031 INFO L87 Difference]: Start difference. First operand 185674 states and 229561 transitions. Second operand 8 states. [2018-11-07 07:14:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:14:29,299 INFO L93 Difference]: Finished difference Result 353974 states and 447114 transitions. [2018-11-07 07:14:29,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 07:14:29,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2018-11-07 07:14:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:14:29,808 INFO L225 Difference]: With dead ends: 353974 [2018-11-07 07:14:29,808 INFO L226 Difference]: Without dead ends: 176259 [2018-11-07 07:14:30,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 756 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 07:14:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176259 states. Received shutdown request... [2018-11-07 07:14:31,595 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 07:14:31,600 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 07:14:31,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:14:31 BoogieIcfgContainer [2018-11-07 07:14:31,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 07:14:31,601 INFO L168 Benchmark]: Toolchain (without parser) took 203165.77 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.4 GB). Free memory was 1.4 GB in the beginning and 3.8 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-07 07:14:31,602 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:14:31,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1177.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:31,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 218.06 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 723.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -849.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:31,604 INFO L168 Benchmark]: Boogie Preprocessor took 134.20 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:14:31,605 INFO L168 Benchmark]: RCFGBuilder took 5344.22 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 264.1 MB). Peak memory consumption was 264.1 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:31,606 INFO L168 Benchmark]: TraceAbstraction took 196286.87 ms. Allocated memory was 2.2 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 1.9 GB in the beginning and 3.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-07 07:14:31,610 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1177.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 218.06 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 723.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -849.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.20 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5344.22 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 264.1 MB). Peak memory consumption was 264.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 196286.87 ms. Allocated memory was 2.2 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 1.9 GB in the beginning and 3.8 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1524]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1524). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 196.2s OverallTime, 17 OverallIterations, 5 TraceHistogramMax, 130.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4040 SDtfs, 25208 SDslu, 4742 SDs, 0 SdLazy, 40134 SolverSat, 7903 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.7s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 6279 GetRequests, 5946 SyntacticMatches, 12 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=185674occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.9s AbstIntTime, 12 AbstIntIterations, 2 AbstIntStrong, 0.9991675163467987 AbsIntWeakeningRatio, 0.2876712328767123 AbsIntAvgWeakeningVarsNumRemoved, 57.842465753424655 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 27.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 17630 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 6804 NumberOfCodeBlocks, 6804 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 9493 ConstructedInterpolants, 0 QuantifiedInterpolants, 7449712 SizeOfPredicates, 35 NumberOfNonLiveVariables, 11543 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 37 InterpolantComputations, 12 PerfectInterpolantSequences, 3920/4300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown