java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 15:26:55,603 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 15:26:55,606 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 15:26:55,619 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 15:26:55,620 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 15:26:55,621 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 15:26:55,622 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 15:26:55,625 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 15:26:55,627 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 15:26:55,629 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 15:26:55,630 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 15:26:55,631 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 15:26:55,632 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 15:26:55,633 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 15:26:55,637 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 15:26:55,638 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 15:26:55,640 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 15:26:55,643 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 15:26:55,651 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 15:26:55,656 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 15:26:55,657 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 15:26:55,658 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 15:26:55,660 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 15:26:55,660 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 15:26:55,660 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 15:26:55,661 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 15:26:55,662 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 15:26:55,663 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 15:26:55,664 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 15:26:55,665 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 15:26:55,665 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 15:26:55,666 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 15:26:55,666 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 15:26:55,666 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 15:26:55,667 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 15:26:55,668 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 15:26:55,668 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 15:26:55,693 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 15:26:55,694 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 15:26:55,695 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 15:26:55,695 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 15:26:55,695 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 15:26:55,695 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 15:26:55,695 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 15:26:55,696 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 15:26:55,696 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 15:26:55,696 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 15:26:55,696 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 15:26:55,696 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 15:26:55,696 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 15:26:55,697 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 15:26:55,697 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 15:26:55,698 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 15:26:55,698 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 15:26:55,698 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 15:26:55,698 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 15:26:55,698 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 15:26:55,699 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 15:26:55,699 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 15:26:55,699 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 15:26:55,699 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 15:26:55,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 15:26:55,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 15:26:55,700 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 15:26:55,700 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 15:26:55,700 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 15:26:55,700 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 15:26:55,701 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 15:26:55,701 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 15:26:55,701 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 15:26:55,701 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 15:26:55,701 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 15:26:55,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 15:26:55,766 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 15:26:55,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 15:26:55,771 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 15:26:55,772 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 15:26:55,773 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43_false-unreach-call.c [2018-11-12 15:26:55,837 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c5facba/19de00fb76534148895ea8b52c44b0fb/FLAG10df737df [2018-11-12 15:26:56,608 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 15:26:56,609 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label43_false-unreach-call.c [2018-11-12 15:26:56,633 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c5facba/19de00fb76534148895ea8b52c44b0fb/FLAG10df737df [2018-11-12 15:26:56,648 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c5facba/19de00fb76534148895ea8b52c44b0fb [2018-11-12 15:26:56,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 15:26:56,661 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 15:26:56,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 15:26:56,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 15:26:56,665 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 15:26:56,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:26:56" (1/1) ... [2018-11-12 15:26:56,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a501ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:56, skipping insertion in model container [2018-11-12 15:26:56,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 03:26:56" (1/1) ... [2018-11-12 15:26:56,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 15:26:56,767 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 15:26:57,465 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 15:26:57,471 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 15:26:57,784 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 15:26:57,809 INFO L193 MainTranslator]: Completed translation [2018-11-12 15:26:57,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57 WrapperNode [2018-11-12 15:26:57,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 15:26:57,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 15:26:57,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 15:26:57,811 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 15:26:57,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 15:26:58,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 15:26:58,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 15:26:58,022 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 15:26:58,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... [2018-11-12 15:26:58,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 15:26:58,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 15:26:58,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 15:26:58,201 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 15:26:58,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 15:26:58,276 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 15:26:58,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 15:26:58,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 15:26:58,277 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 15:26:58,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 15:26:58,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 15:26:58,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 15:26:58,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 15:26:58,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 15:27:03,160 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 15:27:03,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:27:03 BoogieIcfgContainer [2018-11-12 15:27:03,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 15:27:03,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 15:27:03,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 15:27:03,166 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 15:27:03,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 03:26:56" (1/3) ... [2018-11-12 15:27:03,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f328cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:27:03, skipping insertion in model container [2018-11-12 15:27:03,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 03:26:57" (2/3) ... [2018-11-12 15:27:03,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f328cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 03:27:03, skipping insertion in model container [2018-11-12 15:27:03,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 03:27:03" (3/3) ... [2018-11-12 15:27:03,170 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label43_false-unreach-call.c [2018-11-12 15:27:03,182 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 15:27:03,192 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 15:27:03,210 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 15:27:03,262 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 15:27:03,263 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 15:27:03,263 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 15:27:03,263 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 15:27:03,263 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 15:27:03,263 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 15:27:03,263 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 15:27:03,264 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 15:27:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-12 15:27:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-12 15:27:03,329 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:03,330 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] [2018-11-12 15:27:03,333 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:03,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1369692532, now seen corresponding path program 1 times [2018-11-12 15:27:03,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:03,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:03,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:03,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:03,405 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:04,582 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 15:27:04,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 15:27:04,583 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:27:04,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 15:27:04,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 15:27:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 15:27:04,615 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-11-12 15:27:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:27:07,775 INFO L93 Difference]: Finished difference Result 1066 states and 1924 transitions. [2018-11-12 15:27:07,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 15:27:07,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2018-11-12 15:27:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:27:07,804 INFO L225 Difference]: With dead ends: 1066 [2018-11-12 15:27:07,804 INFO L226 Difference]: Without dead ends: 748 [2018-11-12 15:27:07,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 15:27:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-11-12 15:27:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 527. [2018-11-12 15:27:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-11-12 15:27:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 902 transitions. [2018-11-12 15:27:07,926 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 902 transitions. Word has length 157 [2018-11-12 15:27:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:27:07,927 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 902 transitions. [2018-11-12 15:27:07,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 15:27:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 902 transitions. [2018-11-12 15:27:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-12 15:27:07,945 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:07,945 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:27:07,946 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:07,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1257030803, now seen corresponding path program 1 times [2018-11-12 15:27:07,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:07,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:07,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:07,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:07,948 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:08,298 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 15:27:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:08,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 15:27:08,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 15:27:08,518 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:27:08,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 15:27:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 15:27:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 15:27:08,521 INFO L87 Difference]: Start difference. First operand 527 states and 902 transitions. Second operand 6 states. [2018-11-12 15:27:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:27:12,053 INFO L93 Difference]: Finished difference Result 1590 states and 2793 transitions. [2018-11-12 15:27:12,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 15:27:12,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2018-11-12 15:27:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:27:12,074 INFO L225 Difference]: With dead ends: 1590 [2018-11-12 15:27:12,074 INFO L226 Difference]: Without dead ends: 1069 [2018-11-12 15:27:12,081 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 15:27:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-11-12 15:27:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1024. [2018-11-12 15:27:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-11-12 15:27:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1746 transitions. [2018-11-12 15:27:12,184 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1746 transitions. Word has length 167 [2018-11-12 15:27:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:27:12,185 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1746 transitions. [2018-11-12 15:27:12,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 15:27:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1746 transitions. [2018-11-12 15:27:12,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-12 15:27:12,199 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:12,199 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:27:12,199 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:12,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1501741467, now seen corresponding path program 1 times [2018-11-12 15:27:12,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:12,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:12,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:12,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:12,202 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:12,505 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 15:27:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:12,655 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 15:27:12,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 15:27:12,655 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:27:12,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 15:27:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 15:27:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 15:27:12,657 INFO L87 Difference]: Start difference. First operand 1024 states and 1746 transitions. Second operand 5 states. [2018-11-12 15:27:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:27:15,606 INFO L93 Difference]: Finished difference Result 3166 states and 5674 transitions. [2018-11-12 15:27:15,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 15:27:15,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2018-11-12 15:27:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:27:15,627 INFO L225 Difference]: With dead ends: 3166 [2018-11-12 15:27:15,628 INFO L226 Difference]: Without dead ends: 2148 [2018-11-12 15:27:15,634 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 15:27:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2018-11-12 15:27:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2105. [2018-11-12 15:27:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2018-11-12 15:27:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 3422 transitions. [2018-11-12 15:27:15,731 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 3422 transitions. Word has length 168 [2018-11-12 15:27:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:27:15,732 INFO L480 AbstractCegarLoop]: Abstraction has 2105 states and 3422 transitions. [2018-11-12 15:27:15,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 15:27:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 3422 transitions. [2018-11-12 15:27:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-12 15:27:15,739 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:15,739 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] [2018-11-12 15:27:15,739 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:15,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2091995536, now seen corresponding path program 1 times [2018-11-12 15:27:15,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:15,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:15,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:15,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:15,742 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:16,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 15:27:16,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 15:27:16,026 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:27:16,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 15:27:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 15:27:16,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 15:27:16,027 INFO L87 Difference]: Start difference. First operand 2105 states and 3422 transitions. Second operand 3 states. [2018-11-12 15:27:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:27:18,611 INFO L93 Difference]: Finished difference Result 6103 states and 10298 transitions. [2018-11-12 15:27:18,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 15:27:18,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-11-12 15:27:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:27:18,645 INFO L225 Difference]: With dead ends: 6103 [2018-11-12 15:27:18,646 INFO L226 Difference]: Without dead ends: 4004 [2018-11-12 15:27:18,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 15:27:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2018-11-12 15:27:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 3997. [2018-11-12 15:27:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3997 states. [2018-11-12 15:27:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6338 transitions. [2018-11-12 15:27:18,784 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 6338 transitions. Word has length 170 [2018-11-12 15:27:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:27:18,784 INFO L480 AbstractCegarLoop]: Abstraction has 3997 states and 6338 transitions. [2018-11-12 15:27:18,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 15:27:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 6338 transitions. [2018-11-12 15:27:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-12 15:27:18,796 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:18,797 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:27:18,797 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:18,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:18,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2082264545, now seen corresponding path program 1 times [2018-11-12 15:27:18,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:18,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:18,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:18,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:18,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:18,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 15:27:18,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 15:27:18,988 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:27:18,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 15:27:18,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 15:27:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 15:27:18,990 INFO L87 Difference]: Start difference. First operand 3997 states and 6338 transitions. Second operand 6 states. [2018-11-12 15:27:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:27:21,108 INFO L93 Difference]: Finished difference Result 12245 states and 21126 transitions. [2018-11-12 15:27:21,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 15:27:21,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-11-12 15:27:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:27:21,162 INFO L225 Difference]: With dead ends: 12245 [2018-11-12 15:27:21,162 INFO L226 Difference]: Without dead ends: 8254 [2018-11-12 15:27:21,193 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 15:27:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8254 states. [2018-11-12 15:27:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8254 to 8069. [2018-11-12 15:27:21,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8069 states. [2018-11-12 15:27:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 12454 transitions. [2018-11-12 15:27:21,460 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 12454 transitions. Word has length 177 [2018-11-12 15:27:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:27:21,461 INFO L480 AbstractCegarLoop]: Abstraction has 8069 states and 12454 transitions. [2018-11-12 15:27:21,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 15:27:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 12454 transitions. [2018-11-12 15:27:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-12 15:27:21,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:21,482 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:27:21,483 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:21,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1864572249, now seen corresponding path program 1 times [2018-11-12 15:27:21,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:21,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:21,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:21,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:21,487 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:21,754 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 15:27:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:21,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:27:21,923 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:27:21,924 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 182 with the following transitions: [2018-11-12 15:27:21,927 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:27:21,986 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:27:21,986 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:27:23,681 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 15:27:23,683 INFO L272 AbstractInterpreter]: Visited 158 different actions 158 times. Never merged. Never widened. Performed 2976 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2976 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 88 variables. [2018-11-12 15:27:23,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:23,715 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 15:27:24,885 INFO L227 lantSequenceWeakener]: Weakened 170 states. On average, predicates are now at 70.41% of their original sizes. [2018-11-12 15:27:24,885 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 15:27:26,643 INFO L415 sIntCurrentIteration]: We unified 180 AI predicates to 180 [2018-11-12 15:27:26,643 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 15:27:26,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 15:27:26,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 24 [2018-11-12 15:27:26,645 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:27:26,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 15:27:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 15:27:26,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2018-11-12 15:27:26,646 INFO L87 Difference]: Start difference. First operand 8069 states and 12454 transitions. Second operand 21 states. [2018-11-12 15:27:57,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:27:57,964 INFO L93 Difference]: Finished difference Result 16342 states and 25205 transitions. [2018-11-12 15:27:57,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 15:27:57,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 181 [2018-11-12 15:27:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:27:58,003 INFO L225 Difference]: With dead ends: 16342 [2018-11-12 15:27:58,003 INFO L226 Difference]: Without dead ends: 8279 [2018-11-12 15:27:58,025 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 183 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2018-11-12 15:27:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2018-11-12 15:27:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 8277. [2018-11-12 15:27:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8277 states. [2018-11-12 15:27:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 12672 transitions. [2018-11-12 15:27:58,268 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 12672 transitions. Word has length 181 [2018-11-12 15:27:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:27:58,268 INFO L480 AbstractCegarLoop]: Abstraction has 8277 states and 12672 transitions. [2018-11-12 15:27:58,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 15:27:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 12672 transitions. [2018-11-12 15:27:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-12 15:27:58,294 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:27:58,294 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:27:58,295 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:27:58,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:27:58,295 INFO L82 PathProgramCache]: Analyzing trace with hash -47252174, now seen corresponding path program 1 times [2018-11-12 15:27:58,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:27:58,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:58,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:27:58,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:27:58,297 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:27:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:27:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:27:58,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:27:58,636 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:27:58,636 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 191 with the following transitions: [2018-11-12 15:27:58,637 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:27:58,648 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:27:58,648 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:28:01,472 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:28:01,472 INFO L272 AbstractInterpreter]: Visited 162 different actions 316 times. Merged at 4 different actions 4 times. Never widened. Performed 7498 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7498 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 15:28:01,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:01,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:28:01,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:01,514 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:28:01,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:01,532 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:28:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:01,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:28:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-12 15:28:01,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:28:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-12 15:28:02,001 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 15:28:02,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2018-11-12 15:28:02,001 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:28:02,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 15:28:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 15:28:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-12 15:28:02,003 INFO L87 Difference]: Start difference. First operand 8277 states and 12672 transitions. Second operand 3 states. [2018-11-12 15:28:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:28:04,605 INFO L93 Difference]: Finished difference Result 16337 states and 25118 transitions. [2018-11-12 15:28:04,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 15:28:04,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2018-11-12 15:28:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:28:04,642 INFO L225 Difference]: With dead ends: 16337 [2018-11-12 15:28:04,643 INFO L226 Difference]: Without dead ends: 8274 [2018-11-12 15:28:04,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-12 15:28:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8274 states. [2018-11-12 15:28:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8274 to 8274. [2018-11-12 15:28:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2018-11-12 15:28:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12661 transitions. [2018-11-12 15:28:04,975 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12661 transitions. Word has length 190 [2018-11-12 15:28:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:28:04,975 INFO L480 AbstractCegarLoop]: Abstraction has 8274 states and 12661 transitions. [2018-11-12 15:28:04,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 15:28:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12661 transitions. [2018-11-12 15:28:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-12 15:28:04,998 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:28:04,998 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 15:28:04,998 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:28:04,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash 321080033, now seen corresponding path program 1 times [2018-11-12 15:28:04,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:28:05,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:05,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:05,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:05,001 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:28:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-12 15:28:05,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:05,353 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:28:05,353 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-12 15:28:05,353 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:28:05,360 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:28:05,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:28:08,338 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:28:08,338 INFO L272 AbstractInterpreter]: Visited 163 different actions 321 times. Merged at 5 different actions 7 times. Never widened. Performed 10547 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10547 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 15:28:08,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:08,346 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:28:08,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:08,346 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:28:08,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:08,355 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:28:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:08,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:28:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-12 15:28:08,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:28:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-12 15:28:09,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 15:28:09,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-11-12 15:28:09,266 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 15:28:09,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-12 15:28:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-12 15:28:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-12 15:28:09,269 INFO L87 Difference]: Start difference. First operand 8274 states and 12661 transitions. Second operand 8 states. [2018-11-12 15:28:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:28:13,634 INFO L93 Difference]: Finished difference Result 29862 states and 58777 transitions. [2018-11-12 15:28:13,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-12 15:28:13,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 210 [2018-11-12 15:28:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:28:13,804 INFO L225 Difference]: With dead ends: 29862 [2018-11-12 15:28:13,804 INFO L226 Difference]: Without dead ends: 21802 [2018-11-12 15:28:13,910 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-12 15:28:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21802 states. [2018-11-12 15:28:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21802 to 21309. [2018-11-12 15:28:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21309 states. [2018-11-12 15:28:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21309 states to 21309 states and 34974 transitions. [2018-11-12 15:28:14,866 INFO L78 Accepts]: Start accepts. Automaton has 21309 states and 34974 transitions. Word has length 210 [2018-11-12 15:28:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:28:14,866 INFO L480 AbstractCegarLoop]: Abstraction has 21309 states and 34974 transitions. [2018-11-12 15:28:14,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-12 15:28:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21309 states and 34974 transitions. [2018-11-12 15:28:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-11-12 15:28:14,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:28:14,948 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:28:14,949 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:28:14,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1873025378, now seen corresponding path program 1 times [2018-11-12 15:28:14,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:28:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:14,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:14,950 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:28:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:28:15,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:15,465 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:28:15,466 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2018-11-12 15:28:15,466 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [147], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:28:15,477 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:28:15,477 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:28:18,310 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:28:18,311 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 5 different actions 7 times. Never widened. Performed 10527 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10527 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 15:28:18,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:18,319 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:28:18,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:18,319 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:28:18,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:18,329 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:28:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:18,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:28:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 15:28:18,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:28:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 15:28:18,903 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 15:28:18,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-12 15:28:18,904 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:28:18,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 15:28:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 15:28:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 15:28:18,905 INFO L87 Difference]: Start difference. First operand 21309 states and 34974 transitions. Second operand 3 states. [2018-11-12 15:28:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:28:21,365 INFO L93 Difference]: Finished difference Result 48092 states and 80419 transitions. [2018-11-12 15:28:21,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 15:28:21,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2018-11-12 15:28:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:28:21,515 INFO L225 Difference]: With dead ends: 48092 [2018-11-12 15:28:21,515 INFO L226 Difference]: Without dead ends: 27107 [2018-11-12 15:28:21,599 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 438 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-12 15:28:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27107 states. [2018-11-12 15:28:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27107 to 27102. [2018-11-12 15:28:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27102 states. [2018-11-12 15:28:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27102 states to 27102 states and 45018 transitions. [2018-11-12 15:28:22,383 INFO L78 Accepts]: Start accepts. Automaton has 27102 states and 45018 transitions. Word has length 220 [2018-11-12 15:28:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:28:22,384 INFO L480 AbstractCegarLoop]: Abstraction has 27102 states and 45018 transitions. [2018-11-12 15:28:22,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 15:28:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27102 states and 45018 transitions. [2018-11-12 15:28:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-11-12 15:28:22,455 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:28:22,455 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:28:22,455 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:28:22,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash 87158770, now seen corresponding path program 1 times [2018-11-12 15:28:22,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:28:22,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:22,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:22,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:22,457 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:28:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 89 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 15:28:22,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:22,938 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:28:22,938 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 233 with the following transitions: [2018-11-12 15:28:22,939 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:28:22,945 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:28:22,946 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:28:25,331 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:28:25,331 INFO L272 AbstractInterpreter]: Visited 163 different actions 321 times. Merged at 5 different actions 7 times. Never widened. Performed 10621 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10621 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 15:28:25,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:25,339 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:28:25,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:25,339 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:28:25,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:25,349 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:28:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:25,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:28:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 15:28:25,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:28:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 15:28:26,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 15:28:26,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 15:28:26,205 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 15:28:26,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 15:28:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 15:28:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-12 15:28:26,207 INFO L87 Difference]: Start difference. First operand 27102 states and 45018 transitions. Second operand 9 states. [2018-11-12 15:28:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:28:30,207 INFO L93 Difference]: Finished difference Result 75360 states and 137131 transitions. [2018-11-12 15:28:30,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 15:28:30,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 232 [2018-11-12 15:28:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:28:30,629 INFO L225 Difference]: With dead ends: 75360 [2018-11-12 15:28:30,629 INFO L226 Difference]: Without dead ends: 48472 [2018-11-12 15:28:30,787 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 465 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2018-11-12 15:28:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48472 states. [2018-11-12 15:28:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48472 to 45661. [2018-11-12 15:28:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45661 states. [2018-11-12 15:28:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45661 states to 45661 states and 72241 transitions. [2018-11-12 15:28:32,799 INFO L78 Accepts]: Start accepts. Automaton has 45661 states and 72241 transitions. Word has length 232 [2018-11-12 15:28:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:28:32,800 INFO L480 AbstractCegarLoop]: Abstraction has 45661 states and 72241 transitions. [2018-11-12 15:28:32,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 15:28:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 45661 states and 72241 transitions. [2018-11-12 15:28:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-12 15:28:32,860 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:28:32,860 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:28:32,860 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:28:32,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1686035612, now seen corresponding path program 1 times [2018-11-12 15:28:32,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:28:32,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:32,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:28:32,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:28:32,862 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:28:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:28:33,215 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 15:28:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-12 15:28:33,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:28:33,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:28:33,676 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-11-12 15:28:33,677 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:28:33,683 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:28:33,683 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:28:35,437 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 15:28:35,437 INFO L272 AbstractInterpreter]: Visited 161 different actions 318 times. Merged at 5 different actions 7 times. Never widened. Performed 10623 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10623 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-12 15:28:35,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:28:35,468 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 15:28:37,656 INFO L227 lantSequenceWeakener]: Weakened 76 states. On average, predicates are now at 72.17% of their original sizes. [2018-11-12 15:28:37,657 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 15:28:43,634 INFO L415 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2018-11-12 15:28:43,635 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 15:28:43,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 15:28:43,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-12 15:28:43,636 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 15:28:43,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 15:28:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 15:28:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-11-12 15:28:43,637 INFO L87 Difference]: Start difference. First operand 45661 states and 72241 transitions. Second operand 22 states. [2018-11-12 15:30:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:30:05,354 INFO L93 Difference]: Finished difference Result 91954 states and 145413 transitions. [2018-11-12 15:30:05,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 15:30:05,355 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 233 [2018-11-12 15:30:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:30:05,629 INFO L225 Difference]: With dead ends: 91954 [2018-11-12 15:30:05,630 INFO L226 Difference]: Without dead ends: 46507 [2018-11-12 15:30:05,746 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 243 GetRequests, 139 SyntacticMatches, 73 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2018-11-12 15:30:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46507 states. [2018-11-12 15:30:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46507 to 46501. [2018-11-12 15:30:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46501 states. [2018-11-12 15:30:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46501 states to 46501 states and 73154 transitions. [2018-11-12 15:30:07,099 INFO L78 Accepts]: Start accepts. Automaton has 46501 states and 73154 transitions. Word has length 233 [2018-11-12 15:30:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:30:07,099 INFO L480 AbstractCegarLoop]: Abstraction has 46501 states and 73154 transitions. [2018-11-12 15:30:07,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 15:30:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 46501 states and 73154 transitions. [2018-11-12 15:30:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-11-12 15:30:07,156 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:30:07,156 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:30:07,157 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:30:07,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:30:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash -932129760, now seen corresponding path program 1 times [2018-11-12 15:30:07,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:30:07,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:30:07,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:30:07,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:30:07,158 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:30:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:30:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 148 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 15:30:07,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:30:07,630 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:30:07,630 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 290 with the following transitions: [2018-11-12 15:30:07,630 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:30:07,635 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:30:07,635 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:30:10,767 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:30:10,768 INFO L272 AbstractInterpreter]: Visited 163 different actions 480 times. Merged at 7 different actions 14 times. Never widened. Performed 12029 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12029 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-12 15:30:10,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:30:10,774 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:30:10,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:30:10,774 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:30:10,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:30:10,784 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:30:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:30:11,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:30:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 15:30:11,546 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:30:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-12 15:30:11,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 15:30:11,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 15:30:11,965 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 15:30:11,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 15:30:11,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 15:30:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-12 15:30:11,968 INFO L87 Difference]: Start difference. First operand 46501 states and 73154 transitions. Second operand 9 states. [2018-11-12 15:30:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:30:19,857 INFO L93 Difference]: Finished difference Result 108510 states and 174994 transitions. [2018-11-12 15:30:19,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-12 15:30:19,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 289 [2018-11-12 15:30:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:30:20,206 INFO L225 Difference]: With dead ends: 108510 [2018-11-12 15:30:20,207 INFO L226 Difference]: Without dead ends: 63063 [2018-11-12 15:30:20,364 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 612 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=500, Invalid=1950, Unknown=0, NotChecked=0, Total=2450 [2018-11-12 15:30:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63063 states. [2018-11-12 15:30:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63063 to 60655. [2018-11-12 15:30:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60655 states. [2018-11-12 15:30:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60655 states to 60655 states and 77030 transitions. [2018-11-12 15:30:21,843 INFO L78 Accepts]: Start accepts. Automaton has 60655 states and 77030 transitions. Word has length 289 [2018-11-12 15:30:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:30:21,844 INFO L480 AbstractCegarLoop]: Abstraction has 60655 states and 77030 transitions. [2018-11-12 15:30:21,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 15:30:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 60655 states and 77030 transitions. [2018-11-12 15:30:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-11-12 15:30:21,882 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:30:21,882 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 15:30:21,882 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:30:21,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:30:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1191580367, now seen corresponding path program 1 times [2018-11-12 15:30:21,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:30:21,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:30:21,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:30:21,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:30:21,884 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:30:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:30:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:30:22,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:30:22,517 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:30:22,518 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 315 with the following transitions: [2018-11-12 15:30:22,518 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [600], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:30:22,522 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:30:22,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:30:25,320 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:30:25,321 INFO L272 AbstractInterpreter]: Visited 162 different actions 480 times. Merged at 7 different actions 17 times. Never widened. Performed 11842 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11842 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-12 15:30:25,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:30:25,329 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:30:25,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:30:25,329 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:30:25,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:30:25,339 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:30:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:30:25,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:30:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:30:25,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:30:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:30:25,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 15:30:25,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-12 15:30:25,845 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 15:30:25,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 15:30:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 15:30:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-12 15:30:25,846 INFO L87 Difference]: Start difference. First operand 60655 states and 77030 transitions. Second operand 6 states. [2018-11-12 15:30:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 15:30:29,391 INFO L93 Difference]: Finished difference Result 127315 states and 166642 transitions. [2018-11-12 15:30:29,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 15:30:29,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 314 [2018-11-12 15:30:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 15:30:29,565 INFO L225 Difference]: With dead ends: 127315 [2018-11-12 15:30:29,565 INFO L226 Difference]: Without dead ends: 67922 [2018-11-12 15:30:29,652 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 629 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-12 15:30:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67922 states. [2018-11-12 15:30:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67922 to 65400. [2018-11-12 15:30:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65400 states. [2018-11-12 15:30:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65400 states to 65400 states and 78858 transitions. [2018-11-12 15:30:30,801 INFO L78 Accepts]: Start accepts. Automaton has 65400 states and 78858 transitions. Word has length 314 [2018-11-12 15:30:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 15:30:30,802 INFO L480 AbstractCegarLoop]: Abstraction has 65400 states and 78858 transitions. [2018-11-12 15:30:30,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 15:30:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 65400 states and 78858 transitions. [2018-11-12 15:30:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-11-12 15:30:30,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 15:30:30,839 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 15:30:30,839 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 15:30:30,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:30:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1558759391, now seen corresponding path program 1 times [2018-11-12 15:30:30,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 15:30:30,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:30:30,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:30:30,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 15:30:30,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 15:30:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:30:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:30:31,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:30:31,255 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 15:30:31,255 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 323 with the following transitions: [2018-11-12 15:30:31,255 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], [257], [260], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [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], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-12 15:30:31,260 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 15:30:31,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 15:30:33,637 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 15:30:33,637 INFO L272 AbstractInterpreter]: Visited 162 different actions 483 times. Merged at 7 different actions 21 times. Never widened. Performed 10579 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10579 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-12 15:30:33,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 15:30:33,646 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 15:30:33,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 15:30:33,646 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 15:30:33,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 15:30:33,659 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 15:30:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 15:30:33,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 15:30:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:30:33,987 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 15:30:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 15:30:34,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 15:30:34,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 15:30:34,681 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 15:30:34,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 15:30:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 15:30:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-12 15:30:34,683 INFO L87 Difference]: Start difference. First operand 65400 states and 78858 transitions. Second operand 9 states. Received shutdown request... [2018-11-12 15:30:36,227 WARN L187 SmtUtils]: Removed 6 from assertion stack [2018-11-12 15:30:36,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-12 15:30:36,228 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 15:30:36,232 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 15:30:36,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 03:30:36 BoogieIcfgContainer [2018-11-12 15:30:36,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 15:30:36,234 INFO L168 Benchmark]: Toolchain (without parser) took 219574.21 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 946.8 MB in the end (delta: 468.2 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-12 15:30:36,235 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 15:30:36,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1148.46 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. [2018-11-12 15:30:36,237 INFO L168 Benchmark]: Boogie Procedure Inliner took 210.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -871.9 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2018-11-12 15:30:36,238 INFO L168 Benchmark]: Boogie Preprocessor took 178.97 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 15:30:36,238 INFO L168 Benchmark]: RCFGBuilder took 4960.54 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 255.8 MB). Peak memory consumption was 255.8 MB. Max. memory is 7.1 GB. [2018-11-12 15:30:36,239 INFO L168 Benchmark]: TraceAbstraction took 213071.10 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.9 GB in the beginning and 946.8 MB in the end (delta: 999.8 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-11-12 15:30:36,243 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 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 1148.46 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 210.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -871.9 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 178.97 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4960.54 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 255.8 MB). Peak memory consumption was 255.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213071.10 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.9 GB in the beginning and 946.8 MB in the end (delta: 999.8 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1485]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1485). Cancelled while BasicCegarLoop was constructing difference of abstraction (65400states) and FLOYD_HOARE automaton (currently 15 states, 9 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 212.9s OverallTime, 14 OverallIterations, 4 TraceHistogramMax, 156.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2967 SDtfs, 16584 SDslu, 3434 SDs, 0 SdLazy, 26918 SolverSat, 4795 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96.0s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 4178 GetRequests, 3901 SyntacticMatches, 84 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65400occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 23.0s AbstIntTime, 9 AbstIntIterations, 2 AbstIntStrong, 0.9991220500003091 AbsIntWeakeningRatio, 0.3058252427184466 AbsIntAvgWeakeningVarsNumRemoved, 37.810679611650485 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 8.9s AutomataMinimizationTime, 13 MinimizatonAttempts, 8748 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 4807 NumberOfCodeBlocks, 4807 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 6556 ConstructedInterpolants, 0 QuantifiedInterpolants, 4351888 SizeOfPredicates, 6 NumberOfNonLiveVariables, 7996 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 28 InterpolantComputations, 9 PerfectInterpolantSequences, 2830/2946 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown