java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label18_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 12:28:57,071 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 12:28:57,074 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 12:28:57,090 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 12:28:57,090 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 12:28:57,091 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 12:28:57,092 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 12:28:57,094 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 12:28:57,096 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 12:28:57,097 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 12:28:57,098 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 12:28:57,098 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 12:28:57,099 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 12:28:57,100 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 12:28:57,101 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 12:28:57,102 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 12:28:57,103 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 12:28:57,105 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 12:28:57,107 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 12:28:57,108 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 12:28:57,109 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 12:28:57,111 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 12:28:57,113 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 12:28:57,113 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 12:28:57,114 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 12:28:57,115 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 12:28:57,116 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 12:28:57,117 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 12:28:57,117 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 12:28:57,118 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 12:28:57,119 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 12:28:57,120 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 12:28:57,120 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 12:28:57,120 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 12:28:57,121 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 12:28:57,122 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 12:28:57,122 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 12:28:57,139 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 12:28:57,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 12:28:57,141 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 12:28:57,144 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 12:28:57,144 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 12:28:57,144 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 12:28:57,144 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 12:28:57,145 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 12:28:57,145 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 12:28:57,145 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 12:28:57,145 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 12:28:57,145 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 12:28:57,146 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 12:28:57,147 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 12:28:57,147 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 12:28:57,147 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 12:28:57,147 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 12:28:57,147 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 12:28:57,148 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 12:28:57,148 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 12:28:57,148 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 12:28:57,148 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 12:28:57,148 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 12:28:57,148 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 12:28:57,150 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:28:57,150 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 12:28:57,150 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 12:28:57,150 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 12:28:57,151 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 12:28:57,151 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 12:28:57,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 12:28:57,151 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 12:28:57,152 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 12:28:57,152 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 12:28:57,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 12:28:57,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 12:28:57,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 12:28:57,220 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 12:28:57,220 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 12:28:57,221 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label18_true-unreach-call.c [2018-10-27 12:28:57,284 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a49b420c9/b9fac3c36bf5429fb4f9a7d643cbc9da/FLAG55ae92a57 [2018-10-27 12:28:57,971 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 12:28:57,972 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label18_true-unreach-call.c [2018-10-27 12:28:57,996 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a49b420c9/b9fac3c36bf5429fb4f9a7d643cbc9da/FLAG55ae92a57 [2018-10-27 12:28:58,015 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a49b420c9/b9fac3c36bf5429fb4f9a7d643cbc9da [2018-10-27 12:28:58,029 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 12:28:58,031 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 12:28:58,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 12:28:58,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 12:28:58,040 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 12:28:58,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:28:58" (1/1) ... [2018-10-27 12:28:58,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8d5e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:58, skipping insertion in model container [2018-10-27 12:28:58,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:28:58" (1/1) ... [2018-10-27 12:28:58,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 12:28:58,154 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 12:28:58,994 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:28:59,000 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 12:28:59,293 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:28:59,318 INFO L193 MainTranslator]: Completed translation [2018-10-27 12:28:59,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59 WrapperNode [2018-10-27 12:28:59,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 12:28:59,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 12:28:59,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 12:28:59,321 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 12:28:59,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 12:28:59,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 12:28:59,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 12:28:59,662 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 12:28:59,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... [2018-10-27 12:28:59,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 12:28:59,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 12:28:59,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 12:28:59,816 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 12:28:59,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:28:59,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 12:28:59,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 12:28:59,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 12:28:59,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 12:28:59,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 12:28:59,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 12:28:59,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 12:28:59,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 12:29:04,504 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 12:29:04,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:29:04 BoogieIcfgContainer [2018-10-27 12:29:04,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 12:29:04,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 12:29:04,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 12:29:04,510 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 12:29:04,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:28:58" (1/3) ... [2018-10-27 12:29:04,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d05e0f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:29:04, skipping insertion in model container [2018-10-27 12:29:04,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:28:59" (2/3) ... [2018-10-27 12:29:04,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d05e0f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:29:04, skipping insertion in model container [2018-10-27 12:29:04,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:29:04" (3/3) ... [2018-10-27 12:29:04,516 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label18_true-unreach-call.c [2018-10-27 12:29:04,527 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 12:29:04,536 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 12:29:04,554 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 12:29:04,594 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 12:29:04,595 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 12:29:04,595 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 12:29:04,595 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 12:29:04,595 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 12:29:04,595 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 12:29:04,595 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 12:29:04,596 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 12:29:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 12:29:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-27 12:29:04,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:04,650 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:29:04,652 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:04,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1820417999, now seen corresponding path program 1 times [2018-10-27 12:29:04,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:04,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:04,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:04,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:04,721 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:05,669 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:29:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:05,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:05,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:29:05,945 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:05,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:29:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:29:05,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:05,973 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 12:29:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:07,790 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-10-27 12:29:07,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:29:07,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-10-27 12:29:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:07,819 INFO L225 Difference]: With dead ends: 848 [2018-10-27 12:29:07,820 INFO L226 Difference]: Without dead ends: 534 [2018-10-27 12:29:07,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-10-27 12:29:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-10-27 12:29:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-10-27 12:29:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-10-27 12:29:07,919 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 210 [2018-10-27 12:29:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:07,921 INFO L481 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-10-27 12:29:07,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:29:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-10-27 12:29:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-27 12:29:07,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:07,932 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:29:07,932 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:07,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1878986571, now seen corresponding path program 1 times [2018-10-27 12:29:07,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:07,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:07,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:07,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:07,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:08,516 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:08,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:29:08,516 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:08,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:29:08,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:29:08,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:08,520 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-10-27 12:29:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:10,733 INFO L93 Difference]: Finished difference Result 1493 states and 2512 transitions. [2018-10-27 12:29:10,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:29:10,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 223 [2018-10-27 12:29:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:10,742 INFO L225 Difference]: With dead ends: 1493 [2018-10-27 12:29:10,743 INFO L226 Difference]: Without dead ends: 967 [2018-10-27 12:29:10,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:29:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-10-27 12:29:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 951. [2018-10-27 12:29:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-10-27 12:29:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1540 transitions. [2018-10-27 12:29:10,809 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1540 transitions. Word has length 223 [2018-10-27 12:29:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:10,810 INFO L481 AbstractCegarLoop]: Abstraction has 951 states and 1540 transitions. [2018-10-27 12:29:10,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:29:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1540 transitions. [2018-10-27 12:29:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-27 12:29:10,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:10,818 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:29:10,819 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:10,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash -463761996, now seen corresponding path program 1 times [2018-10-27 12:29:10,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:10,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:10,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:10,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:10,821 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:11,086 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:29:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:11,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:29:11,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:29:11,417 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:11,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:29:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:29:11,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:29:11,418 INFO L87 Difference]: Start difference. First operand 951 states and 1540 transitions. Second operand 6 states. [2018-10-27 12:29:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:29:14,935 INFO L93 Difference]: Finished difference Result 2784 states and 4694 transitions. [2018-10-27 12:29:14,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:29:14,939 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 238 [2018-10-27 12:29:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:29:14,954 INFO L225 Difference]: With dead ends: 2784 [2018-10-27 12:29:14,955 INFO L226 Difference]: Without dead ends: 1839 [2018-10-27 12:29:14,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 12:29:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2018-10-27 12:29:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1809. [2018-10-27 12:29:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2018-10-27 12:29:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2782 transitions. [2018-10-27 12:29:15,051 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2782 transitions. Word has length 238 [2018-10-27 12:29:15,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:29:15,052 INFO L481 AbstractCegarLoop]: Abstraction has 1809 states and 2782 transitions. [2018-10-27 12:29:15,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:29:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2782 transitions. [2018-10-27 12:29:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-27 12:29:15,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:29:15,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:29:15,064 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:29:15,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1286729823, now seen corresponding path program 1 times [2018-10-27 12:29:15,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:29:15,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:15,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:29:15,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:29:15,067 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:29:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:29:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:29:15,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:29:15,654 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:29:15,655 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2018-10-27 12:29:15,658 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], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:29:15,758 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:29:15,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:29:18,805 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:29:18,806 INFO L272 AbstractInterpreter]: Visited 214 different actions 422 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:29:18,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:29:18,849 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:29:21,209 INFO L227 lantSequenceWeakener]: Weakened 102 states. On average, predicates are now at 82.38% of their original sizes. [2018-10-27 12:29:21,212 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:29:26,657 INFO L415 sIntCurrentIteration]: We unified 256 AI predicates to 256 [2018-10-27 12:29:26,657 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:29:26,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:29:26,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [6] total 28 [2018-10-27 12:29:26,659 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:29:26,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-27 12:29:26,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-27 12:29:26,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-10-27 12:29:26,660 INFO L87 Difference]: Start difference. First operand 1809 states and 2782 transitions. Second operand 24 states. [2018-10-27 12:30:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:30:31,296 INFO L93 Difference]: Finished difference Result 4659 states and 6944 transitions. [2018-10-27 12:30:31,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-27 12:30:31,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 257 [2018-10-27 12:30:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:30:31,311 INFO L225 Difference]: With dead ends: 4659 [2018-10-27 12:30:31,311 INFO L226 Difference]: Without dead ends: 2856 [2018-10-27 12:30:31,318 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 267 GetRequests, 201 SyntacticMatches, 33 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2018-10-27 12:30:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2018-10-27 12:30:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2853. [2018-10-27 12:30:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2853 states. [2018-10-27 12:30:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 3907 transitions. [2018-10-27 12:30:31,400 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 3907 transitions. Word has length 257 [2018-10-27 12:30:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:30:31,401 INFO L481 AbstractCegarLoop]: Abstraction has 2853 states and 3907 transitions. [2018-10-27 12:30:31,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-27 12:30:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 3907 transitions. [2018-10-27 12:30:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-27 12:30:31,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:30:31,413 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:30:31,413 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:30:31,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1350497136, now seen corresponding path program 1 times [2018-10-27 12:30:31,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:30:31,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:31,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:30:31,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:31,416 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:30:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:30:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:30:31,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:30:31,895 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:30:31,896 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2018-10-27 12:30:31,896 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:30:31,916 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:30:31,916 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:30:33,404 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:30:33,405 INFO L272 AbstractInterpreter]: Visited 214 different actions 421 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:30:33,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:33,409 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:30:34,341 INFO L227 lantSequenceWeakener]: Weakened 252 states. On average, predicates are now at 74.56% of their original sizes. [2018-10-27 12:30:34,342 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:30:34,610 INFO L415 sIntCurrentIteration]: We unified 256 AI predicates to 256 [2018-10-27 12:30:34,610 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:30:34,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:30:34,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-10-27 12:30:34,610 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:30:34,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 12:30:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 12:30:34,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-10-27 12:30:34,612 INFO L87 Difference]: Start difference. First operand 2853 states and 3907 transitions. Second operand 16 states. [2018-10-27 12:30:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:30:54,910 INFO L93 Difference]: Finished difference Result 5530 states and 7916 transitions. [2018-10-27 12:30:54,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 12:30:54,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 257 [2018-10-27 12:30:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:30:54,928 INFO L225 Difference]: With dead ends: 5530 [2018-10-27 12:30:54,928 INFO L226 Difference]: Without dead ends: 3727 [2018-10-27 12:30:54,936 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 265 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2018-10-27 12:30:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2018-10-27 12:30:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3725. [2018-10-27 12:30:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3725 states. [2018-10-27 12:30:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 4931 transitions. [2018-10-27 12:30:55,032 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 4931 transitions. Word has length 257 [2018-10-27 12:30:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:30:55,033 INFO L481 AbstractCegarLoop]: Abstraction has 3725 states and 4931 transitions. [2018-10-27 12:30:55,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-27 12:30:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 4931 transitions. [2018-10-27 12:30:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-27 12:30:55,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:30:55,046 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:30:55,046 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:30:55,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1876536729, now seen corresponding path program 1 times [2018-10-27 12:30:55,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:30:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:55,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:30:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:55,048 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:30:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:30:55,665 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-27 12:30:55,893 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-27 12:30:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 12:30:56,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:30:56,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:30:56,308 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:30:56,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:30:56,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:30:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:30:56,310 INFO L87 Difference]: Start difference. First operand 3725 states and 4931 transitions. Second operand 6 states. [2018-10-27 12:30:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:30:58,302 INFO L93 Difference]: Finished difference Result 7004 states and 9766 transitions. [2018-10-27 12:30:58,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 12:30:58,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 258 [2018-10-27 12:30:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:30:58,322 INFO L225 Difference]: With dead ends: 7004 [2018-10-27 12:30:58,322 INFO L226 Difference]: Without dead ends: 4088 [2018-10-27 12:30:58,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:30:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2018-10-27 12:30:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3967. [2018-10-27 12:30:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3967 states. [2018-10-27 12:30:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3967 states to 3967 states and 5205 transitions. [2018-10-27 12:30:58,427 INFO L78 Accepts]: Start accepts. Automaton has 3967 states and 5205 transitions. Word has length 258 [2018-10-27 12:30:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:30:58,428 INFO L481 AbstractCegarLoop]: Abstraction has 3967 states and 5205 transitions. [2018-10-27 12:30:58,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:30:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3967 states and 5205 transitions. [2018-10-27 12:30:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-10-27 12:30:58,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:30:58,445 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:30:58,445 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:30:58,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash -499129863, now seen corresponding path program 1 times [2018-10-27 12:30:58,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:30:58,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:58,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:30:58,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:30:58,447 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:30:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:30:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:30:58,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:30:58,786 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:30:58,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 337 with the following transitions: [2018-10-27 12:30:58,787 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:30:58,794 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:30:58,794 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:30:59,860 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:30:59,860 INFO L272 AbstractInterpreter]: Visited 214 different actions 422 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 12:30:59,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:30:59,868 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:31:00,940 INFO L227 lantSequenceWeakener]: Weakened 331 states. On average, predicates are now at 73.41% of their original sizes. [2018-10-27 12:31:00,940 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:31:01,203 INFO L415 sIntCurrentIteration]: We unified 335 AI predicates to 335 [2018-10-27 12:31:01,203 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:31:01,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:31:01,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-10-27 12:31:01,204 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:31:01,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 12:31:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 12:31:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-10-27 12:31:01,205 INFO L87 Difference]: Start difference. First operand 3967 states and 5205 transitions. Second operand 17 states. [2018-10-27 12:31:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:18,701 INFO L93 Difference]: Finished difference Result 7942 states and 11032 transitions. [2018-10-27 12:31:18,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 12:31:18,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 336 [2018-10-27 12:31:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:18,721 INFO L225 Difference]: With dead ends: 7942 [2018-10-27 12:31:18,721 INFO L226 Difference]: Without dead ends: 5025 [2018-10-27 12:31:18,732 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 344 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2018-10-27 12:31:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2018-10-27 12:31:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 5024. [2018-10-27 12:31:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5024 states. [2018-10-27 12:31:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 6510 transitions. [2018-10-27 12:31:18,849 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 6510 transitions. Word has length 336 [2018-10-27 12:31:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:18,849 INFO L481 AbstractCegarLoop]: Abstraction has 5024 states and 6510 transitions. [2018-10-27 12:31:18,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 12:31:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 6510 transitions. [2018-10-27 12:31:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-10-27 12:31:18,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:18,870 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:31:18,870 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:18,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash 802495686, now seen corresponding path program 1 times [2018-10-27 12:31:18,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:18,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:18,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:18,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:18,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:19,238 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:31:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 158 proven. 44 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-10-27 12:31:19,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:19,356 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:19,356 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 342 with the following transitions: [2018-10-27 12:31:19,356 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:19,362 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:19,362 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:22,141 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:22,142 INFO L272 AbstractInterpreter]: Visited 217 different actions 645 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 12:31:22,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:22,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:22,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:22,150 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:22,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:22,168 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:22,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:31:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-27 12:31:22,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:31:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-27 12:31:23,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:31:23,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-10-27 12:31:23,950 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:31:23,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 12:31:23,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 12:31:23,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-10-27 12:31:23,951 INFO L87 Difference]: Start difference. First operand 5024 states and 6510 transitions. Second operand 10 states. [2018-10-27 12:31:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:28,853 INFO L93 Difference]: Finished difference Result 12002 states and 16106 transitions. [2018-10-27 12:31:28,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 12:31:28,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 341 [2018-10-27 12:31:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:28,905 INFO L225 Difference]: With dead ends: 12002 [2018-10-27 12:31:28,905 INFO L226 Difference]: Without dead ends: 8028 [2018-10-27 12:31:28,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 688 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2018-10-27 12:31:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2018-10-27 12:31:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 8022. [2018-10-27 12:31:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8022 states. [2018-10-27 12:31:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 9816 transitions. [2018-10-27 12:31:29,128 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 9816 transitions. Word has length 341 [2018-10-27 12:31:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:29,128 INFO L481 AbstractCegarLoop]: Abstraction has 8022 states and 9816 transitions. [2018-10-27 12:31:29,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 12:31:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 9816 transitions. [2018-10-27 12:31:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-10-27 12:31:29,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:29,158 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:31:29,158 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:29,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 476916234, now seen corresponding path program 1 times [2018-10-27 12:31:29,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:29,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:29,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:29,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:29,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 187 proven. 58 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-27 12:31:29,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:29,816 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:29,816 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-10-27 12:31:29,816 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [334], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:29,821 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:29,822 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:33,238 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:33,238 INFO L272 AbstractInterpreter]: Visited 217 different actions 645 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 12:31:33,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:33,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:33,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:33,247 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:33,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:33,256 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:33,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:31:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 162 proven. 74 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-27 12:31:33,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:31:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 234 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-27 12:31:34,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:31:34,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-10-27 12:31:34,488 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:31:34,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 12:31:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 12:31:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-27 12:31:34,491 INFO L87 Difference]: Start difference. First operand 8022 states and 9816 transitions. Second operand 8 states. [2018-10-27 12:31:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:40,444 INFO L93 Difference]: Finished difference Result 25718 states and 33569 transitions. [2018-10-27 12:31:40,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-27 12:31:40,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 373 [2018-10-27 12:31:40,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:40,518 INFO L225 Difference]: With dead ends: 25718 [2018-10-27 12:31:40,518 INFO L226 Difference]: Without dead ends: 18620 [2018-10-27 12:31:40,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 765 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2018-10-27 12:31:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18620 states. [2018-10-27 12:31:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18620 to 17873. [2018-10-27 12:31:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17873 states. [2018-10-27 12:31:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17873 states to 17873 states and 21045 transitions. [2018-10-27 12:31:40,982 INFO L78 Accepts]: Start accepts. Automaton has 17873 states and 21045 transitions. Word has length 373 [2018-10-27 12:31:40,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:40,982 INFO L481 AbstractCegarLoop]: Abstraction has 17873 states and 21045 transitions. [2018-10-27 12:31:40,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 12:31:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 17873 states and 21045 transitions. [2018-10-27 12:31:41,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-10-27 12:31:41,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:41,043 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:31:41,044 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:41,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash 731829533, now seen corresponding path program 1 times [2018-10-27 12:31:41,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:41,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:41,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:41,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:41,046 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 176 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 12:31:42,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:42,453 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:42,453 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 390 with the following transitions: [2018-10-27 12:31:42,454 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], [261], [265], [268], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:42,459 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:42,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:45,755 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:45,755 INFO L272 AbstractInterpreter]: Visited 216 different actions 861 times. Merged at 8 different actions 33 times. Never widened. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 12:31:45,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:45,765 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:45,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:45,765 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:45,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:45,774 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:46,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:31:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-27 12:31:46,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:31:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 185 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-27 12:31:47,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:31:47,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 12:31:47,335 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:31:47,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 12:31:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 12:31:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-27 12:31:47,337 INFO L87 Difference]: Start difference. First operand 17873 states and 21045 transitions. Second operand 12 states. [2018-10-27 12:31:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:31:54,658 INFO L93 Difference]: Finished difference Result 46166 states and 55476 transitions. [2018-10-27 12:31:54,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-27 12:31:54,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 389 [2018-10-27 12:31:54,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:31:54,752 INFO L225 Difference]: With dead ends: 46166 [2018-10-27 12:31:54,752 INFO L226 Difference]: Without dead ends: 28926 [2018-10-27 12:31:54,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 801 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 12:31:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28926 states. [2018-10-27 12:31:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28926 to 28802. [2018-10-27 12:31:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28802 states. [2018-10-27 12:31:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28802 states to 28802 states and 34126 transitions. [2018-10-27 12:31:55,449 INFO L78 Accepts]: Start accepts. Automaton has 28802 states and 34126 transitions. Word has length 389 [2018-10-27 12:31:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:31:55,449 INFO L481 AbstractCegarLoop]: Abstraction has 28802 states and 34126 transitions. [2018-10-27 12:31:55,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 12:31:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 28802 states and 34126 transitions. [2018-10-27 12:31:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-10-27 12:31:55,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:31:55,512 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:31:55,513 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:31:55,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -192911202, now seen corresponding path program 1 times [2018-10-27 12:31:55,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:31:55,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:55,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:55,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:31:55,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:31:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:56,251 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 12:31:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 256 proven. 81 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-10-27 12:31:56,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:56,575 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:31:56,576 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 406 with the following transitions: [2018-10-27 12:31:56,576 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:31:56,585 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:31:56,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:31:59,537 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 12:31:59,538 INFO L272 AbstractInterpreter]: Visited 218 different actions 651 times. Merged at 7 different actions 21 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 12:31:59,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:31:59,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 12:31:59,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:31:59,547 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 12:31:59,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:31:59,555 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 12:31:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:31:59,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 12:32:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 365 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-10-27 12:32:00,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 12:32:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 367 proven. 4 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-10-27 12:32:00,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 12:32:00,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 12:32:00,378 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 12:32:00,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 12:32:00,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 12:32:00,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-27 12:32:00,379 INFO L87 Difference]: Start difference. First operand 28802 states and 34126 transitions. Second operand 9 states. [2018-10-27 12:32:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:32:05,844 INFO L93 Difference]: Finished difference Result 104147 states and 135466 transitions. [2018-10-27 12:32:05,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-27 12:32:05,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 405 [2018-10-27 12:32:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:32:06,186 INFO L225 Difference]: With dead ends: 104147 [2018-10-27 12:32:06,186 INFO L226 Difference]: Without dead ends: 76819 [2018-10-27 12:32:06,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 819 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2018-10-27 12:32:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76819 states. [2018-10-27 12:32:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76819 to 72622. [2018-10-27 12:32:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72622 states. [2018-10-27 12:32:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72622 states to 72622 states and 84827 transitions. [2018-10-27 12:32:08,069 INFO L78 Accepts]: Start accepts. Automaton has 72622 states and 84827 transitions. Word has length 405 [2018-10-27 12:32:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:32:08,070 INFO L481 AbstractCegarLoop]: Abstraction has 72622 states and 84827 transitions. [2018-10-27 12:32:08,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 12:32:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 72622 states and 84827 transitions. [2018-10-27 12:32:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-10-27 12:32:08,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:32:08,174 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:32:08,174 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:32:08,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:08,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1969747746, now seen corresponding path program 1 times [2018-10-27 12:32:08,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:32:08,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:08,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:32:08,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:32:08,176 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:32:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:32:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 338 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 12:32:09,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:32:09,058 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:32:09,058 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 439 with the following transitions: [2018-10-27 12:32:09,059 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], [99], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [409], [414], [416], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1081], [1089], [1097], [1105], [1113], [1121], [1129], [1137], [1141], [1143], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 12:32:09,065 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:32:09,066 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:32:12,291 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:32:12,292 INFO L272 AbstractInterpreter]: Visited 215 different actions 644 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 12:32:12,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:32:12,297 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:32:14,218 INFO L227 lantSequenceWeakener]: Weakened 433 states. On average, predicates are now at 72.59% of their original sizes. [2018-10-27 12:32:14,218 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:32:14,597 INFO L415 sIntCurrentIteration]: We unified 437 AI predicates to 437 [2018-10-27 12:32:14,597 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:32:14,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:32:14,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-10-27 12:32:14,598 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:32:14,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 12:32:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 12:32:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-10-27 12:32:14,599 INFO L87 Difference]: Start difference. First operand 72622 states and 84827 transitions. Second operand 21 states. Received shutdown request... [2018-10-27 12:32:45,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 12:32:45,527 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 12:32:45,532 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 12:32:45,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:32:45 BoogieIcfgContainer [2018-10-27 12:32:45,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 12:32:45,534 INFO L168 Benchmark]: Toolchain (without parser) took 227504.06 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-27 12:32:45,535 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 12:32:45,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1286.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:45,536 INFO L168 Benchmark]: Boogie Procedure Inliner took 342.01 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -862.0 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:45,537 INFO L168 Benchmark]: Boogie Preprocessor took 153.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:45,538 INFO L168 Benchmark]: RCFGBuilder took 4689.60 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: 260.4 MB). Peak memory consumption was 260.4 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:45,538 INFO L168 Benchmark]: TraceAbstraction took 221026.59 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 2.6 GB in the end (delta: -665.7 MB). Peak memory consumption was 963.8 MB. Max. memory is 7.1 GB. [2018-10-27 12:32:45,543 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1286.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 342.01 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -862.0 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4689.60 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: 260.4 MB). Peak memory consumption was 260.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221026.59 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 2.6 GB in the end (delta: -665.7 MB). Peak memory consumption was 963.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1644]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1644). Cancelled while BasicCegarLoop was constructing difference of abstraction (72622states) and FLOYD_HOARE automaton (currently 15 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (25617 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 220.9s OverallTime, 12 OverallIterations, 7 TraceHistogramMax, 167.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2650 SDtfs, 25207 SDslu, 4084 SDs, 0 SdLazy, 31905 SolverSat, 5146 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.3s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4550 GetRequests, 4264 SyntacticMatches, 51 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 14.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72622occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 21.5s AbstIntTime, 8 AbstIntIterations, 4 AbstIntStrong, 0.9992928317979468 AbsIntWeakeningRatio, 0.2102803738317757 AbsIntAvgWeakeningVarsNumRemoved, 57.911993769470406 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.6s AutomataMinimizationTime, 11 MinimizatonAttempts, 5249 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 5233 NumberOfCodeBlocks, 5233 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6721 ConstructedInterpolants, 0 QuantifiedInterpolants, 6035572 SizeOfPredicates, 4 NumberOfNonLiveVariables, 6290 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 4194/4654 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown