java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:15:00,623 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:15:00,627 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:15:00,643 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:15:00,644 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:15:00,645 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:15:00,646 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:15:00,648 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:15:00,650 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:15:00,651 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:15:00,652 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:15:00,652 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:15:00,653 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:15:00,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:15:00,655 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:15:00,656 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:15:00,657 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:15:00,659 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:15:00,661 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:15:00,663 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:15:00,664 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:15:00,666 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:15:00,668 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:15:00,669 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:15:00,669 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:15:00,670 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:15:00,671 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:15:00,672 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:15:00,673 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:15:00,674 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:15:00,674 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:15:00,675 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:15:00,675 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:15:00,675 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:15:00,676 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:15:00,677 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:15:00,678 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 06:15:00,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:15:00,693 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:15:00,694 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 06:15:00,695 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 06:15:00,695 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 06:15:00,695 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 06:15:00,695 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 06:15:00,695 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 06:15:00,696 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 06:15:00,696 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 06:15:00,696 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 06:15:00,696 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 06:15:00,696 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 06:15:00,696 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 06:15:00,697 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:15:00,697 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:15:00,698 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:15:00,700 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 06:15:00,700 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 06:15:00,700 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 06:15:00,700 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:15:00,701 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 06:15:00,701 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:15:00,701 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:15:00,701 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 06:15:00,701 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 06:15:00,702 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 06:15:00,702 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:15:00,702 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 06:15:00,702 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 06:15:00,702 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 06:15:00,703 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 06:15:00,703 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 06:15:00,703 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 06:15:00,704 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 06:15:00,704 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 06:15:00,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:15:00,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:15:00,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:15:00,783 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:15:00,783 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:15:00,784 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-10-27 06:15:00,850 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/916fa8157/bcd2114b8bb9447da0c61b991d6e1716/FLAGd246b27ae [2018-10-27 06:15:01,434 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:15:01,436 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label01_true-unreach-call.c [2018-10-27 06:15:01,454 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/916fa8157/bcd2114b8bb9447da0c61b991d6e1716/FLAGd246b27ae [2018-10-27 06:15:01,473 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/916fa8157/bcd2114b8bb9447da0c61b991d6e1716 [2018-10-27 06:15:01,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:15:01,489 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 06:15:01,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:15:01,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:15:01,499 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:15:01,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:15:01" (1/1) ... [2018-10-27 06:15:01,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c237445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:01, skipping insertion in model container [2018-10-27 06:15:01,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:15:01" (1/1) ... [2018-10-27 06:15:01,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:15:01,595 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:15:02,293 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:15:02,298 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:15:02,549 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:15:02,570 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:15:02,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02 WrapperNode [2018-10-27 06:15:02,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:15:02,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:15:02,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:15:02,572 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:15:02,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:15:02,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:15:02,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:15:02,862 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:15:02,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... [2018-10-27 06:15:02,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:15:02,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:15:02,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:15:02,979 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:15:02,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 06:15:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 06:15:03,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 06:15:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 06:15:03,047 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 06:15:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:15:03,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:15:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 06:15:03,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 06:15:07,432 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:15:07,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:15:07 BoogieIcfgContainer [2018-10-27 06:15:07,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:15:07,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 06:15:07,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 06:15:07,438 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 06:15:07,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:15:01" (1/3) ... [2018-10-27 06:15:07,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7d8b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:15:07, skipping insertion in model container [2018-10-27 06:15:07,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:15:02" (2/3) ... [2018-10-27 06:15:07,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7d8b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:15:07, skipping insertion in model container [2018-10-27 06:15:07,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:15:07" (3/3) ... [2018-10-27 06:15:07,444 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label01_true-unreach-call.c [2018-10-27 06:15:07,455 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 06:15:07,466 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 06:15:07,486 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 06:15:07,537 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 06:15:07,538 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 06:15:07,538 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 06:15:07,538 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:15:07,538 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:15:07,539 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 06:15:07,539 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:15:07,539 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 06:15:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 06:15:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-27 06:15:07,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:07,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:07,618 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:07,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1178454204, now seen corresponding path program 1 times [2018-10-27 06:15:07,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:07,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:07,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:07,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:07,689 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:08,618 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:15:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:08,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:15:08,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:15:08,868 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:08,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:15:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:15:08,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:08,895 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 06:15:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:10,824 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-10-27 06:15:10,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:15:10,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-10-27 06:15:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:10,849 INFO L225 Difference]: With dead ends: 844 [2018-10-27 06:15:10,849 INFO L226 Difference]: Without dead ends: 530 [2018-10-27 06:15:10,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-10-27 06:15:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-10-27 06:15:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-10-27 06:15:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-10-27 06:15:10,999 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 193 [2018-10-27 06:15:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:11,001 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-10-27 06:15:11,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:15:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-10-27 06:15:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-27 06:15:11,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:11,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:11,013 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:11,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash 851918400, now seen corresponding path program 1 times [2018-10-27 06:15:11,013 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:11,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:11,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:11,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:11,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:11,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:15:11,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 06:15:11,520 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:11,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:15:11,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:15:11,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:11,523 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-10-27 06:15:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:13,645 INFO L93 Difference]: Finished difference Result 1477 states and 2511 transitions. [2018-10-27 06:15:13,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:15:13,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2018-10-27 06:15:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:13,654 INFO L225 Difference]: With dead ends: 1477 [2018-10-27 06:15:13,655 INFO L226 Difference]: Without dead ends: 958 [2018-10-27 06:15:13,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 06:15:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-10-27 06:15:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 943. [2018-10-27 06:15:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 943 states. [2018-10-27 06:15:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1546 transitions. [2018-10-27 06:15:13,721 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1546 transitions. Word has length 206 [2018-10-27 06:15:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:13,722 INFO L481 AbstractCegarLoop]: Abstraction has 943 states and 1546 transitions. [2018-10-27 06:15:13,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:15:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1546 transitions. [2018-10-27 06:15:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 06:15:13,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:13,730 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:13,731 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:13,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash 584750157, now seen corresponding path program 1 times [2018-10-27 06:15:13,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:13,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:13,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:13,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:13,735 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:13,968 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:15:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:14,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:15:14,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 06:15:14,047 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:14,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 06:15:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:15:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:15:14,049 INFO L87 Difference]: Start difference. First operand 943 states and 1546 transitions. Second operand 6 states. [2018-10-27 06:15:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:18,207 INFO L93 Difference]: Finished difference Result 2885 states and 4975 transitions. [2018-10-27 06:15:18,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 06:15:18,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2018-10-27 06:15:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:18,234 INFO L225 Difference]: With dead ends: 2885 [2018-10-27 06:15:18,234 INFO L226 Difference]: Without dead ends: 1948 [2018-10-27 06:15:18,240 INFO L605 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 [2018-10-27 06:15:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2018-10-27 06:15:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1883. [2018-10-27 06:15:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2018-10-27 06:15:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 3103 transitions. [2018-10-27 06:15:18,362 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 3103 transitions. Word has length 211 [2018-10-27 06:15:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:18,362 INFO L481 AbstractCegarLoop]: Abstraction has 1883 states and 3103 transitions. [2018-10-27 06:15:18,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 06:15:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 3103 transitions. [2018-10-27 06:15:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-27 06:15:18,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:18,372 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:18,372 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:18,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:18,372 INFO L82 PathProgramCache]: Analyzing trace with hash -223286947, now seen corresponding path program 1 times [2018-10-27 06:15:18,373 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:18,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:18,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:18,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:18,374 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:18,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:15:18,635 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:15:18,636 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-10-27 06:15:18,638 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [25], [29], [33], [36], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:15:18,703 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:15:18,703 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:15:19,956 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:15:19,958 INFO L272 AbstractInterpreter]: Visited 194 different actions 194 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 06:15:20,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:20,001 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:15:21,124 INFO L227 lantSequenceWeakener]: Weakened 209 states. On average, predicates are now at 73.89% of their original sizes. [2018-10-27 06:15:21,124 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:15:22,399 INFO L415 sIntCurrentIteration]: We unified 217 AI predicates to 217 [2018-10-27 06:15:22,400 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:15:22,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:15:22,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-10-27 06:15:22,402 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:22,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 06:15:22,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 06:15:22,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-10-27 06:15:22,403 INFO L87 Difference]: Start difference. First operand 1883 states and 3103 transitions. Second operand 16 states. [2018-10-27 06:15:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:15:52,491 INFO L93 Difference]: Finished difference Result 3970 states and 6516 transitions. [2018-10-27 06:15:52,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:15:52,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 218 [2018-10-27 06:15:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:15:52,503 INFO L225 Difference]: With dead ends: 3970 [2018-10-27 06:15:52,503 INFO L226 Difference]: Without dead ends: 2093 [2018-10-27 06:15:52,509 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 218 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-10-27 06:15:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2018-10-27 06:15:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2018-10-27 06:15:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2018-10-27 06:15:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 3320 transitions. [2018-10-27 06:15:52,571 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 3320 transitions. Word has length 218 [2018-10-27 06:15:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:15:52,571 INFO L481 AbstractCegarLoop]: Abstraction has 2091 states and 3320 transitions. [2018-10-27 06:15:52,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-27 06:15:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 3320 transitions. [2018-10-27 06:15:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-27 06:15:52,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:15:52,580 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:15:52,581 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:15:52,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1470271054, now seen corresponding path program 1 times [2018-10-27 06:15:52,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:15:52,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:52,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:15:52,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:15:52,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:15:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:15:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:15:53,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:15:53,120 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:15:53,120 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2018-10-27 06:15:53,121 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:15:53,132 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:15:53,132 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:15:54,028 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:15:54,028 INFO L272 AbstractInterpreter]: Visited 197 different actions 387 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:15:54,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:15:54,036 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:15:55,239 INFO L227 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 76.61% of their original sizes. [2018-10-27 06:15:55,239 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:15:56,353 INFO L415 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2018-10-27 06:15:56,353 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:15:56,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:15:56,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-10-27 06:15:56,354 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:15:56,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 06:15:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 06:15:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-10-27 06:15:56,356 INFO L87 Difference]: Start difference. First operand 2091 states and 3320 transitions. Second operand 22 states. [2018-10-27 06:16:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:16:42,183 INFO L93 Difference]: Finished difference Result 5250 states and 8654 transitions. [2018-10-27 06:16:42,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 06:16:42,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 225 [2018-10-27 06:16:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:16:42,201 INFO L225 Difference]: With dead ends: 5250 [2018-10-27 06:16:42,202 INFO L226 Difference]: Without dead ends: 3373 [2018-10-27 06:16:42,208 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 233 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2018-10-27 06:16:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2018-10-27 06:16:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3365. [2018-10-27 06:16:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3365 states. [2018-10-27 06:16:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 5116 transitions. [2018-10-27 06:16:42,296 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 5116 transitions. Word has length 225 [2018-10-27 06:16:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:16:42,296 INFO L481 AbstractCegarLoop]: Abstraction has 3365 states and 5116 transitions. [2018-10-27 06:16:42,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 06:16:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 5116 transitions. [2018-10-27 06:16:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-27 06:16:42,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:16:42,309 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:16:42,309 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:16:42,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:42,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1234399812, now seen corresponding path program 1 times [2018-10-27 06:16:42,310 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:16:42,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:42,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:42,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:42,311 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:16:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:42,579 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:16:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:16:42,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:42,706 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:16:42,706 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 229 with the following transitions: [2018-10-27 06:16:42,706 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [24], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:16:42,714 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:16:42,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:16:43,652 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:16:43,653 INFO L272 AbstractInterpreter]: Visited 199 different actions 591 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:16:43,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:43,665 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:16:43,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:43,666 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:16:43,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:43,681 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:16:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:43,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:16:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 06:16:44,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:16:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 06:16:45,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:16:45,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-10-27 06:16:45,745 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:16:45,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 06:16:45,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 06:16:45,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:16:45,746 INFO L87 Difference]: Start difference. First operand 3365 states and 5116 transitions. Second operand 5 states. [2018-10-27 06:16:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:16:47,094 INFO L93 Difference]: Finished difference Result 8829 states and 14138 transitions. [2018-10-27 06:16:47,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 06:16:47,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2018-10-27 06:16:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:16:47,130 INFO L225 Difference]: With dead ends: 8829 [2018-10-27 06:16:47,130 INFO L226 Difference]: Without dead ends: 6099 [2018-10-27 06:16:47,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 446 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:16:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2018-10-27 06:16:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 6096. [2018-10-27 06:16:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6096 states. [2018-10-27 06:16:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 9655 transitions. [2018-10-27 06:16:47,299 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 9655 transitions. Word has length 228 [2018-10-27 06:16:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:16:47,299 INFO L481 AbstractCegarLoop]: Abstraction has 6096 states and 9655 transitions. [2018-10-27 06:16:47,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 06:16:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 9655 transitions. [2018-10-27 06:16:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-27 06:16:47,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:16:47,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:16:47,321 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:16:47,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1815954702, now seen corresponding path program 1 times [2018-10-27 06:16:47,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:16:47,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:47,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:47,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:47,324 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:16:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:47,652 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 06:16:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:16:48,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:48,203 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:16:48,203 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 228 with the following transitions: [2018-10-27 06:16:48,203 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:16:48,209 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:16:48,209 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:16:49,410 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:16:49,410 INFO L272 AbstractInterpreter]: Visited 198 different actions 590 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:16:49,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:49,418 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:16:49,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:49,418 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:16:49,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:49,427 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:16:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:49,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:16:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:16:49,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:16:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:16:49,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:16:49,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 06:16:49,939 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:16:49,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:16:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:16:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:16:49,940 INFO L87 Difference]: Start difference. First operand 6096 states and 9655 transitions. Second operand 12 states. [2018-10-27 06:16:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:16:57,707 INFO L93 Difference]: Finished difference Result 30589 states and 55076 transitions. [2018-10-27 06:16:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-27 06:16:57,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2018-10-27 06:16:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:16:57,867 INFO L225 Difference]: With dead ends: 30589 [2018-10-27 06:16:57,868 INFO L226 Difference]: Without dead ends: 24288 [2018-10-27 06:16:57,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 462 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 06:16:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2018-10-27 06:16:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 24257. [2018-10-27 06:16:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24257 states. [2018-10-27 06:16:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24257 states to 24257 states and 37387 transitions. [2018-10-27 06:16:58,762 INFO L78 Accepts]: Start accepts. Automaton has 24257 states and 37387 transitions. Word has length 227 [2018-10-27 06:16:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:16:58,762 INFO L481 AbstractCegarLoop]: Abstraction has 24257 states and 37387 transitions. [2018-10-27 06:16:58,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:16:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 24257 states and 37387 transitions. [2018-10-27 06:16:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-27 06:16:58,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:16:58,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:16:58,847 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:16:58,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:16:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1873001038, now seen corresponding path program 1 times [2018-10-27 06:16:58,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:16:58,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:58,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:16:58,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:16:58,849 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:16:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:16:59,294 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 6 [2018-10-27 06:16:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 06:16:59,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:16:59,956 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:16:59,956 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 242 with the following transitions: [2018-10-27 06:16:59,956 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], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:16:59,962 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:16:59,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:01,029 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:17:01,030 INFO L272 AbstractInterpreter]: Visited 198 different actions 591 times. Merged at 7 different actions 21 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:17:01,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:01,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:17:01,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:01,039 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:17:01,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:01,053 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:17:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:01,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:17:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:17:01,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:17:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:17:02,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 06:17:02,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2018-10-27 06:17:02,393 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 06:17:02,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 06:17:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 06:17:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-10-27 06:17:02,394 INFO L87 Difference]: Start difference. First operand 24257 states and 37387 transitions. Second operand 12 states. [2018-10-27 06:17:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:10,534 INFO L93 Difference]: Finished difference Result 103974 states and 177531 transitions. [2018-10-27 06:17:10,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-27 06:17:10,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 241 [2018-10-27 06:17:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:11,070 INFO L225 Difference]: With dead ends: 103974 [2018-10-27 06:17:11,070 INFO L226 Difference]: Without dead ends: 79933 [2018-10-27 06:17:11,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 473 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-10-27 06:17:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79933 states. [2018-10-27 06:17:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79933 to 78092. [2018-10-27 06:17:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78092 states. [2018-10-27 06:17:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78092 states to 78092 states and 119874 transitions. [2018-10-27 06:17:14,621 INFO L78 Accepts]: Start accepts. Automaton has 78092 states and 119874 transitions. Word has length 241 [2018-10-27 06:17:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:14,621 INFO L481 AbstractCegarLoop]: Abstraction has 78092 states and 119874 transitions. [2018-10-27 06:17:14,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 06:17:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 78092 states and 119874 transitions. [2018-10-27 06:17:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-27 06:17:14,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:14,783 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:17:14,783 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:14,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash 191668955, now seen corresponding path program 1 times [2018-10-27 06:17:14,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:14,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:14,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:14,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:14,786 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:15,063 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 06:17:15,401 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-27 06:17:16,028 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-27 06:17:16,389 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-27 06:17:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 06:17:16,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:16,682 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:16,683 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2018-10-27 06:17:16,683 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:16,688 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:16,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:17:17,258 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:17:17,259 INFO L272 AbstractInterpreter]: Visited 198 different actions 390 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:17:17,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:17,265 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:17:18,007 INFO L227 lantSequenceWeakener]: Weakened 253 states. On average, predicates are now at 73.76% of their original sizes. [2018-10-27 06:17:18,007 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:17:18,562 INFO L415 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2018-10-27 06:17:18,562 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:17:18,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:17:18,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [10] total 30 [2018-10-27 06:17:18,563 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:17:18,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 06:17:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 06:17:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-10-27 06:17:18,564 INFO L87 Difference]: Start difference. First operand 78092 states and 119874 transitions. Second operand 22 states. [2018-10-27 06:17:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:17:54,608 INFO L93 Difference]: Finished difference Result 156184 states and 239787 transitions. [2018-10-27 06:17:54,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:17:54,608 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 256 [2018-10-27 06:17:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:17:54,989 INFO L225 Difference]: With dead ends: 156184 [2018-10-27 06:17:54,989 INFO L226 Difference]: Without dead ends: 78308 [2018-10-27 06:17:55,190 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 264 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2018-10-27 06:17:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78308 states. [2018-10-27 06:17:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78308 to 78305. [2018-10-27 06:17:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78305 states. [2018-10-27 06:17:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78305 states to 78305 states and 120094 transitions. [2018-10-27 06:17:57,110 INFO L78 Accepts]: Start accepts. Automaton has 78305 states and 120094 transitions. Word has length 256 [2018-10-27 06:17:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:17:57,111 INFO L481 AbstractCegarLoop]: Abstraction has 78305 states and 120094 transitions. [2018-10-27 06:17:57,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 06:17:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 78305 states and 120094 transitions. [2018-10-27 06:17:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-27 06:17:57,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:17:57,208 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 06:17:57,208 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:17:57,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:17:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash -762328005, now seen corresponding path program 1 times [2018-10-27 06:17:57,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:17:57,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:57,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:17:57,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:17:57,210 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:17:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:17:57,829 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 06:17:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 06:17:59,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:17:59,082 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:17:59,083 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 302 with the following transitions: [2018-10-27 06:17:59,083 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [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], [350], [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], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:17:59,092 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:17:59,092 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:18:00,075 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 06:18:00,075 INFO L272 AbstractInterpreter]: Visited 199 different actions 593 times. Merged at 8 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:18:00,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:00,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 06:18:00,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:00,085 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:18:00,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:00,095 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 06:18:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:00,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:18:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-27 06:18:00,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 06:18:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-27 06:18:00,581 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:18:00,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 06:18:00,581 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:18:00,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 06:18:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 06:18:00,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:18:00,582 INFO L87 Difference]: Start difference. First operand 78305 states and 120094 transitions. Second operand 3 states. [2018-10-27 06:18:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:18:03,617 INFO L93 Difference]: Finished difference Result 221861 states and 346195 transitions. [2018-10-27 06:18:03,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 06:18:03,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 301 [2018-10-27 06:18:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:18:04,395 INFO L225 Difference]: With dead ends: 221861 [2018-10-27 06:18:04,396 INFO L226 Difference]: Without dead ends: 143985 [2018-10-27 06:18:04,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 600 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:18:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143985 states. [2018-10-27 06:18:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143985 to 143892. [2018-10-27 06:18:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143892 states. [2018-10-27 06:18:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143892 states to 143892 states and 211574 transitions. [2018-10-27 06:18:08,521 INFO L78 Accepts]: Start accepts. Automaton has 143892 states and 211574 transitions. Word has length 301 [2018-10-27 06:18:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:18:08,521 INFO L481 AbstractCegarLoop]: Abstraction has 143892 states and 211574 transitions. [2018-10-27 06:18:08,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 06:18:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 143892 states and 211574 transitions. [2018-10-27 06:18:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-10-27 06:18:08,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:08,712 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 06:18:08,712 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:08,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1400355272, now seen corresponding path program 1 times [2018-10-27 06:18:08,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:08,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:08,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:08,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:08,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:18:09,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:09,179 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:18:09,179 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 358 with the following transitions: [2018-10-27 06:18:09,180 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], [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], [256], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:18:09,187 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:18:09,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:18:10,343 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:18:10,344 INFO L272 AbstractInterpreter]: Visited 197 different actions 388 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 06:18:10,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:10,351 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 06:18:11,022 INFO L227 lantSequenceWeakener]: Weakened 354 states. On average, predicates are now at 73.78% of their original sizes. [2018-10-27 06:18:11,022 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:18:11,301 INFO L415 sIntCurrentIteration]: We unified 356 AI predicates to 356 [2018-10-27 06:18:11,302 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 06:18:11,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:18:11,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-10-27 06:18:11,303 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 06:18:11,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 06:18:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 06:18:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-27 06:18:11,304 INFO L87 Difference]: Start difference. First operand 143892 states and 211574 transitions. Second operand 17 states. [2018-10-27 06:18:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:18:31,026 INFO L93 Difference]: Finished difference Result 298267 states and 439740 transitions. [2018-10-27 06:18:31,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:18:31,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 357 [2018-10-27 06:18:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 06:18:31,724 INFO L225 Difference]: With dead ends: 298267 [2018-10-27 06:18:31,725 INFO L226 Difference]: Without dead ends: 154804 [2018-10-27 06:18:31,930 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2018-10-27 06:18:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154804 states. [2018-10-27 06:18:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154804 to 154791. [2018-10-27 06:18:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154791 states. [2018-10-27 06:18:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154791 states to 154791 states and 225503 transitions. [2018-10-27 06:18:35,775 INFO L78 Accepts]: Start accepts. Automaton has 154791 states and 225503 transitions. Word has length 357 [2018-10-27 06:18:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 06:18:35,775 INFO L481 AbstractCegarLoop]: Abstraction has 154791 states and 225503 transitions. [2018-10-27 06:18:35,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 06:18:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 154791 states and 225503 transitions. [2018-10-27 06:18:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-10-27 06:18:35,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 06:18:35,984 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:18:35,985 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 06:18:35,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1448449981, now seen corresponding path program 1 times [2018-10-27 06:18:35,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 06:18:35,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:35,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:18:35,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:18:35,986 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 06:18:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:18:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 202 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:18:36,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:18:36,446 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 06:18:36,446 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 380 with the following transitions: [2018-10-27 06:18:36,446 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], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [543], [548], [550], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1005], [1007], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 06:18:36,451 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 06:18:36,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 06:18:37,774 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 06:18:37,775 INFO L272 AbstractInterpreter]: Visited 200 different actions 798 times. Merged at 8 different actions 33 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 06:18:37,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:18:37,785 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates Received shutdown request... [2018-10-27 06:18:39,180 INFO L227 lantSequenceWeakener]: Weakened 376 states. On average, predicates are now at 76.13% of their original sizes. [2018-10-27 06:18:39,180 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 06:18:39,192 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 06:18:39,197 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 06:18:39,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 06:18:39 BoogieIcfgContainer [2018-10-27 06:18:39,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 06:18:39,198 INFO L168 Benchmark]: Toolchain (without parser) took 217710.39 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-27 06:18:39,199 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 06:18:39,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1080.59 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:39,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 289.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -891.7 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:39,202 INFO L168 Benchmark]: Boogie Preprocessor took 117.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:39,202 INFO L168 Benchmark]: RCFGBuilder took 4454.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 255.4 MB). Peak memory consumption was 255.4 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:39,205 INFO L168 Benchmark]: TraceAbstraction took 211762.69 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 969.3 MB. Max. memory is 7.1 GB. [2018-10-27 06:18:39,211 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1080.59 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 289.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -891.7 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4454.65 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 255.4 MB). Peak memory consumption was 255.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211762.69 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 969.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1593]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1593). Cancelled while BasicCegarLoop was analyzing trace of length 380 with TraceHistMax 4,while AbsIntCurrentIteration was generating AI predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 3 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 211.6s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 163.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2932 SDtfs, 22658 SDslu, 6013 SDs, 0 SdLazy, 21842 SolverSat, 6252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81.9s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 3178 GetRequests, 2971 SyntacticMatches, 18 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154791occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.6s AbstIntTime, 9 AbstIntIterations, 5 AbstIntStrong, 0.9989696602031835 AbsIntWeakeningRatio, 0.23286713286713287 AbsIntAvgWeakeningVarsNumRemoved, 56.86573426573427 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 14.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 2079 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 3660 NumberOfCodeBlocks, 3660 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 4638 ConstructedInterpolants, 0 QuantifiedInterpolants, 2655306 SizeOfPredicates, 13 NumberOfNonLiveVariables, 4590 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 1153/1271 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown