java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label03_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 07:10:43,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 07:10:43,082 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 07:10:43,094 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 07:10:43,094 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 07:10:43,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 07:10:43,096 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 07:10:43,098 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 07:10:43,100 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 07:10:43,101 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 07:10:43,102 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 07:10:43,102 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 07:10:43,103 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 07:10:43,104 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 07:10:43,105 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 07:10:43,106 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 07:10:43,107 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 07:10:43,109 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 07:10:43,111 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 07:10:43,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 07:10:43,113 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 07:10:43,115 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 07:10:43,117 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 07:10:43,117 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 07:10:43,117 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 07:10:43,118 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 07:10:43,119 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 07:10:43,120 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 07:10:43,121 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 07:10:43,122 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 07:10:43,122 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 07:10:43,123 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 07:10:43,123 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 07:10:43,124 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 07:10:43,125 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 07:10:43,125 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 07:10:43,126 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 07:10:43,141 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 07:10:43,141 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 07:10:43,142 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 07:10:43,142 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 07:10:43,143 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 07:10:43,143 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 07:10:43,143 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 07:10:43,143 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 07:10:43,143 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 07:10:43,144 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 07:10:43,144 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 07:10:43,144 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 07:10:43,144 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 07:10:43,144 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 07:10:43,145 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 07:10:43,145 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 07:10:43,146 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 07:10:43,146 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 07:10:43,146 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 07:10:43,146 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 07:10:43,146 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 07:10:43,146 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 07:10:43,147 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 07:10:43,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 07:10:43,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 07:10:43,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 07:10:43,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:10:43,148 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 07:10:43,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 07:10:43,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 07:10:43,148 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 07:10:43,149 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 07:10:43,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 07:10:43,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 07:10:43,149 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 07:10:43,149 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 07:10:43,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 07:10:43,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 07:10:43,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 07:10:43,221 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 07:10:43,222 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 07:10:43,223 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label03_true-unreach-call.c [2018-11-07 07:10:43,288 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d678a832/f6db1c87ccf44574afd251503c95cab9/FLAG5dd55ebdc [2018-11-07 07:10:43,935 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 07:10:43,936 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label03_true-unreach-call.c [2018-11-07 07:10:43,956 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d678a832/f6db1c87ccf44574afd251503c95cab9/FLAG5dd55ebdc [2018-11-07 07:10:43,971 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d678a832/f6db1c87ccf44574afd251503c95cab9 [2018-11-07 07:10:43,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 07:10:43,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 07:10:43,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 07:10:43,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 07:10:43,994 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 07:10:43,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:10:43" (1/1) ... [2018-11-07 07:10:43,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d28a5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:43, skipping insertion in model container [2018-11-07 07:10:43,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:10:43" (1/1) ... [2018-11-07 07:10:44,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 07:10:44,108 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 07:10:44,776 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:10:44,782 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 07:10:45,024 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 07:10:45,049 INFO L193 MainTranslator]: Completed translation [2018-11-07 07:10:45,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45 WrapperNode [2018-11-07 07:10:45,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 07:10:45,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 07:10:45,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 07:10:45,051 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 07:10:45,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 07:10:45,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 07:10:45,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 07:10:45,266 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 07:10:45,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... [2018-11-07 07:10:45,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 07:10:45,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 07:10:45,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 07:10:45,433 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 07:10:45,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 07:10:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 07:10:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 07:10:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 07:10:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 07:10:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 07:10:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 07:10:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 07:10:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 07:10:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 07:10:50,514 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 07:10:50,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:10:50 BoogieIcfgContainer [2018-11-07 07:10:50,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 07:10:50,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 07:10:50,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 07:10:50,520 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 07:10:50,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:10:43" (1/3) ... [2018-11-07 07:10:50,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271cb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:10:50, skipping insertion in model container [2018-11-07 07:10:50,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:10:45" (2/3) ... [2018-11-07 07:10:50,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271cb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:10:50, skipping insertion in model container [2018-11-07 07:10:50,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:10:50" (3/3) ... [2018-11-07 07:10:50,524 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label03_true-unreach-call.c [2018-11-07 07:10:50,535 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 07:10:50,546 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 07:10:50,567 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 07:10:50,616 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 07:10:50,617 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 07:10:50,617 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 07:10:50,617 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 07:10:50,617 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 07:10:50,617 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 07:10:50,618 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 07:10:50,618 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 07:10:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 07:10:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-11-07 07:10:50,674 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:50,675 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] [2018-11-07 07:10:50,678 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:50,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1304680716, now seen corresponding path program 1 times [2018-11-07 07:10:50,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:50,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:50,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:50,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:50,746 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:51,569 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:10:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:10:51,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:10:51,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:10:51,792 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:10:51,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:10:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:10:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:10:51,819 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 07:10:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:10:54,069 INFO L93 Difference]: Finished difference Result 845 states and 1487 transitions. [2018-11-07 07:10:54,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:10:54,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2018-11-07 07:10:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:10:54,097 INFO L225 Difference]: With dead ends: 845 [2018-11-07 07:10:54,097 INFO L226 Difference]: Without dead ends: 531 [2018-11-07 07:10:54,105 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:10:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-11-07 07:10:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 530. [2018-11-07 07:10:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-11-07 07:10:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 869 transitions. [2018-11-07 07:10:54,200 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 869 transitions. Word has length 171 [2018-11-07 07:10:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:10:54,202 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 869 transitions. [2018-11-07 07:10:54,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:10:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 869 transitions. [2018-11-07 07:10:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-07 07:10:54,210 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:54,210 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:10:54,210 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:54,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash 211800901, now seen corresponding path program 1 times [2018-11-07 07:10:54,215 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:54,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:54,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:54,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:54,216 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:10:54,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:10:54,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 07:10:54,528 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:10:54,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:10:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:10:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 07:10:54,531 INFO L87 Difference]: Start difference. First operand 530 states and 869 transitions. Second operand 6 states. [2018-11-07 07:10:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:10:58,270 INFO L93 Difference]: Finished difference Result 1599 states and 2688 transitions. [2018-11-07 07:10:58,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 07:10:58,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2018-11-07 07:10:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:10:58,284 INFO L225 Difference]: With dead ends: 1599 [2018-11-07 07:10:58,285 INFO L226 Difference]: Without dead ends: 1075 [2018-11-07 07:10:58,289 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:10:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2018-11-07 07:10:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1034. [2018-11-07 07:10:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2018-11-07 07:10:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1689 transitions. [2018-11-07 07:10:58,359 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1689 transitions. Word has length 181 [2018-11-07 07:10:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:10:58,359 INFO L480 AbstractCegarLoop]: Abstraction has 1034 states and 1689 transitions. [2018-11-07 07:10:58,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:10:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1689 transitions. [2018-11-07 07:10:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-07 07:10:58,363 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:10:58,364 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] [2018-11-07 07:10:58,364 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:10:58,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:10:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1978156296, now seen corresponding path program 1 times [2018-11-07 07:10:58,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:10:58,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:58,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:10:58,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:10:58,366 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:10:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:10:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:10:58,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:10:58,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 07:10:58,665 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:10:58,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:10:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:10:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:10:58,666 INFO L87 Difference]: Start difference. First operand 1034 states and 1689 transitions. Second operand 3 states. [2018-11-07 07:11:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:01,190 INFO L93 Difference]: Finished difference Result 2915 states and 4931 transitions. [2018-11-07 07:11:01,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:11:01,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2018-11-07 07:11:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:01,218 INFO L225 Difference]: With dead ends: 2915 [2018-11-07 07:11:01,218 INFO L226 Difference]: Without dead ends: 1887 [2018-11-07 07:11:01,223 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 07:11:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2018-11-07 07:11:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1880. [2018-11-07 07:11:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1880 states. [2018-11-07 07:11:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2986 transitions. [2018-11-07 07:11:01,288 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2986 transitions. Word has length 184 [2018-11-07 07:11:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:01,289 INFO L480 AbstractCegarLoop]: Abstraction has 1880 states and 2986 transitions. [2018-11-07 07:11:01,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:11:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2986 transitions. [2018-11-07 07:11:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-07 07:11:01,296 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:01,296 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:01,297 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:01,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 88085177, now seen corresponding path program 1 times [2018-11-07 07:11:01,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:01,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:01,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:01,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:01,299 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:01,539 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:11:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:01,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 07:11:01,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 07:11:01,770 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:01,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 07:11:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 07:11:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 07:11:01,772 INFO L87 Difference]: Start difference. First operand 1880 states and 2986 transitions. Second operand 6 states. [2018-11-07 07:11:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:04,150 INFO L93 Difference]: Finished difference Result 6020 states and 10195 transitions. [2018-11-07 07:11:04,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 07:11:04,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2018-11-07 07:11:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:04,181 INFO L225 Difference]: With dead ends: 6020 [2018-11-07 07:11:04,181 INFO L226 Difference]: Without dead ends: 4146 [2018-11-07 07:11:04,193 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 07:11:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2018-11-07 07:11:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4038. [2018-11-07 07:11:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4038 states. [2018-11-07 07:11:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 6154 transitions. [2018-11-07 07:11:04,327 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 6154 transitions. Word has length 191 [2018-11-07 07:11:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:04,328 INFO L480 AbstractCegarLoop]: Abstraction has 4038 states and 6154 transitions. [2018-11-07 07:11:04,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 07:11:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 6154 transitions. [2018-11-07 07:11:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-07 07:11:04,342 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:04,342 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:04,343 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:04,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1314408798, now seen corresponding path program 1 times [2018-11-07 07:11:04,343 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:04,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:04,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:04,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:04,345 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:04,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:04,649 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:04,650 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 210 with the following transitions: [2018-11-07 07:11:04,661 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [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], [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], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:04,726 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:04,726 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:05,798 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:11:05,800 INFO L272 AbstractInterpreter]: Visited 172 different actions 172 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 07:11:05,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:05,846 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:11:06,799 INFO L227 lantSequenceWeakener]: Weakened 198 states. On average, predicates are now at 71.73% of their original sizes. [2018-11-07 07:11:06,799 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:11:07,188 INFO L415 sIntCurrentIteration]: We unified 208 AI predicates to 208 [2018-11-07 07:11:07,188 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:11:07,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:07,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2018-11-07 07:11:07,190 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:07,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:11:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:11:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-11-07 07:11:07,191 INFO L87 Difference]: Start difference. First operand 4038 states and 6154 transitions. Second operand 12 states. [2018-11-07 07:11:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:17,303 INFO L93 Difference]: Finished difference Result 8280 states and 12606 transitions. [2018-11-07 07:11:17,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 07:11:17,303 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 209 [2018-11-07 07:11:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:17,327 INFO L225 Difference]: With dead ends: 8280 [2018-11-07 07:11:17,327 INFO L226 Difference]: Without dead ends: 4248 [2018-11-07 07:11:17,343 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-11-07 07:11:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2018-11-07 07:11:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 4246. [2018-11-07 07:11:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4246 states. [2018-11-07 07:11:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 6370 transitions. [2018-11-07 07:11:17,482 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 6370 transitions. Word has length 209 [2018-11-07 07:11:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:17,483 INFO L480 AbstractCegarLoop]: Abstraction has 4246 states and 6370 transitions. [2018-11-07 07:11:17,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:11:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 6370 transitions. [2018-11-07 07:11:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-07 07:11:17,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:17,497 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] [2018-11-07 07:11:17,498 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:17,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash -628104531, now seen corresponding path program 1 times [2018-11-07 07:11:17,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:17,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:17,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:17,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:17,500 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:11:17,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:17,943 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:17,943 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-11-07 07:11:17,944 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], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:17,954 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:17,955 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:18,690 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:11:18,691 INFO L272 AbstractInterpreter]: Visited 176 different actions 344 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:11:18,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:18,734 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:11:18,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:18,735 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:11:18,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:18,750 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:11:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:18,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:11:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:11:19,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:11:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:11:19,749 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:19,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 07:11:19,749 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:19,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:11:19,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:11:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:19,751 INFO L87 Difference]: Start difference. First operand 4246 states and 6370 transitions. Second operand 3 states. [2018-11-07 07:11:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:22,293 INFO L93 Difference]: Finished difference Result 12102 states and 18948 transitions. [2018-11-07 07:11:22,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:11:22,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2018-11-07 07:11:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:22,341 INFO L225 Difference]: With dead ends: 12102 [2018-11-07 07:11:22,342 INFO L226 Difference]: Without dead ends: 8070 [2018-11-07 07:11:22,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 434 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8070 states. [2018-11-07 07:11:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8070 to 8032. [2018-11-07 07:11:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8032 states. [2018-11-07 07:11:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8032 states to 8032 states and 12234 transitions. [2018-11-07 07:11:22,596 INFO L78 Accepts]: Start accepts. Automaton has 8032 states and 12234 transitions. Word has length 218 [2018-11-07 07:11:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:22,597 INFO L480 AbstractCegarLoop]: Abstraction has 8032 states and 12234 transitions. [2018-11-07 07:11:22,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:11:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8032 states and 12234 transitions. [2018-11-07 07:11:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 07:11:22,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:22,628 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:11:22,628 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:22,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 837304473, now seen corresponding path program 1 times [2018-11-07 07:11:22,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:22,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:22,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:22,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:22,630 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:11:23,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:23,013 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:23,013 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-07 07:11:23,013 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:23,021 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:23,021 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:24,081 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:11:24,081 INFO L272 AbstractInterpreter]: Visited 178 different actions 347 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:11:24,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:24,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:11:24,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:24,107 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:11:24,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:24,124 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:11:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:24,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:11:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-11-07 07:11:24,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:11:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-07 07:11:25,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 07:11:25,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2018-11-07 07:11:25,021 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:25,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 07:11:25,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 07:11:25,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:25,022 INFO L87 Difference]: Start difference. First operand 8032 states and 12234 transitions. Second operand 3 states. [2018-11-07 07:11:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:26,252 INFO L93 Difference]: Finished difference Result 15849 states and 24253 transitions. [2018-11-07 07:11:26,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 07:11:26,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-11-07 07:11:26,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:26,312 INFO L225 Difference]: With dead ends: 15849 [2018-11-07 07:11:26,312 INFO L226 Difference]: Without dead ends: 8031 [2018-11-07 07:11:26,342 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-07 07:11:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2018-11-07 07:11:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 8031. [2018-11-07 07:11:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8031 states. [2018-11-07 07:11:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8031 states to 8031 states and 12232 transitions. [2018-11-07 07:11:26,580 INFO L78 Accepts]: Start accepts. Automaton has 8031 states and 12232 transitions. Word has length 237 [2018-11-07 07:11:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:26,580 INFO L480 AbstractCegarLoop]: Abstraction has 8031 states and 12232 transitions. [2018-11-07 07:11:26,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 07:11:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 8031 states and 12232 transitions. [2018-11-07 07:11:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-07 07:11:26,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:26,613 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2018-11-07 07:11:26,613 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:26,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1948184938, now seen corresponding path program 1 times [2018-11-07 07:11:26,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:26,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:26,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:26,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:26,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:11:27,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:27,132 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:27,133 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-07 07:11:27,133 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], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:27,143 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:27,143 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:28,056 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:11:28,056 INFO L272 AbstractInterpreter]: Visited 177 different actions 346 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:11:28,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:28,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:11:28,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:28,096 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:11:28,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:28,297 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:11:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:28,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:11:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:11:29,072 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:11:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 07:11:29,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:11:29,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 07:11:29,564 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:11:29,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 07:11:29,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 07:11:29,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 07:11:29,569 INFO L87 Difference]: Start difference. First operand 8031 states and 12232 transitions. Second operand 9 states. [2018-11-07 07:11:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:35,576 INFO L93 Difference]: Finished difference Result 31560 states and 52753 transitions. [2018-11-07 07:11:35,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 07:11:35,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 251 [2018-11-07 07:11:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:11:35,692 INFO L225 Difference]: With dead ends: 31560 [2018-11-07 07:11:35,692 INFO L226 Difference]: Without dead ends: 23743 [2018-11-07 07:11:35,737 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 502 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-11-07 07:11:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23743 states. [2018-11-07 07:11:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23743 to 23579. [2018-11-07 07:11:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23579 states. [2018-11-07 07:11:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23579 states to 23579 states and 36877 transitions. [2018-11-07 07:11:36,435 INFO L78 Accepts]: Start accepts. Automaton has 23579 states and 36877 transitions. Word has length 251 [2018-11-07 07:11:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:11:36,436 INFO L480 AbstractCegarLoop]: Abstraction has 23579 states and 36877 transitions. [2018-11-07 07:11:36,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 07:11:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 23579 states and 36877 transitions. [2018-11-07 07:11:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-11-07 07:11:36,534 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:11:36,534 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 07:11:36,534 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:11:36,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash -368197559, now seen corresponding path program 1 times [2018-11-07 07:11:36,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:11:36,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:36,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:11:36,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:11:36,536 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:11:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:11:36,898 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 07:11:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 76 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 07:11:37,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:11:37,330 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:11:37,330 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2018-11-07 07:11:37,331 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], [269], [273], [277], [280], [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], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:11:37,336 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:11:37,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:11:38,430 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 07:11:38,431 INFO L272 AbstractInterpreter]: Visited 175 different actions 344 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:11:38,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:11:38,456 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 07:11:39,234 INFO L227 lantSequenceWeakener]: Weakened 249 states. On average, predicates are now at 71.89% of their original sizes. [2018-11-07 07:11:39,234 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 07:11:39,605 INFO L415 sIntCurrentIteration]: We unified 251 AI predicates to 251 [2018-11-07 07:11:39,606 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 07:11:39,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 07:11:39,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-07 07:11:39,606 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 07:11:39,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 07:11:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 07:11:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-11-07 07:11:39,608 INFO L87 Difference]: Start difference. First operand 23579 states and 36877 transitions. Second operand 18 states. [2018-11-07 07:11:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:11:59,982 INFO L93 Difference]: Finished difference Result 47158 states and 73843 transitions. [2018-11-07 07:11:59,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 07:11:59,983 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 252 [2018-11-07 07:11:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:00,081 INFO L225 Difference]: With dead ends: 47158 [2018-11-07 07:12:00,081 INFO L226 Difference]: Without dead ends: 23793 [2018-11-07 07:12:00,140 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 260 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2018-11-07 07:12:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23793 states. [2018-11-07 07:12:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23793 to 23790. [2018-11-07 07:12:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23790 states. [2018-11-07 07:12:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23790 states to 23790 states and 37100 transitions. [2018-11-07 07:12:01,266 INFO L78 Accepts]: Start accepts. Automaton has 23790 states and 37100 transitions. Word has length 252 [2018-11-07 07:12:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:01,267 INFO L480 AbstractCegarLoop]: Abstraction has 23790 states and 37100 transitions. [2018-11-07 07:12:01,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 07:12:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 23790 states and 37100 transitions. [2018-11-07 07:12:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-11-07 07:12:01,321 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:01,322 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-11-07 07:12:01,322 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:01,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash 967375626, now seen corresponding path program 1 times [2018-11-07 07:12:01,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:01,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:01,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:01,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:01,324 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 89 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-07 07:12:01,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:01,656 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:01,657 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2018-11-07 07:12:01,657 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:01,663 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:01,663 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:02,819 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:02,820 INFO L272 AbstractInterpreter]: Visited 180 different actions 538 times. Merged at 8 different actions 23 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:12:02,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:02,827 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:02,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:02,827 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:12:02,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:02,836 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:03,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 07:12:03,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 89 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-07 07:12:03,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:12:03,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-11-07 07:12:03,901 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:12:03,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:12:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:12:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 07:12:03,902 INFO L87 Difference]: Start difference. First operand 23790 states and 37100 transitions. Second operand 8 states. [2018-11-07 07:12:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:08,979 INFO L93 Difference]: Finished difference Result 86710 states and 171769 transitions. [2018-11-07 07:12:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 07:12:08,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 257 [2018-11-07 07:12:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:09,423 INFO L225 Difference]: With dead ends: 86710 [2018-11-07 07:12:09,424 INFO L226 Difference]: Without dead ends: 63345 [2018-11-07 07:12:10,332 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:12:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63345 states. [2018-11-07 07:12:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63345 to 61639. [2018-11-07 07:12:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61639 states. [2018-11-07 07:12:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61639 states to 61639 states and 100418 transitions. [2018-11-07 07:12:12,212 INFO L78 Accepts]: Start accepts. Automaton has 61639 states and 100418 transitions. Word has length 257 [2018-11-07 07:12:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:12,212 INFO L480 AbstractCegarLoop]: Abstraction has 61639 states and 100418 transitions. [2018-11-07 07:12:12,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 07:12:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 61639 states and 100418 transitions. [2018-11-07 07:12:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-11-07 07:12:12,293 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:12,293 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:12:12,293 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:12,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1971503759, now seen corresponding path program 1 times [2018-11-07 07:12:12,294 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:12,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:12,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:12,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:12,295 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:12,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:12,882 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:12,882 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 272 with the following transitions: [2018-11-07 07:12:12,883 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [320], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:12,889 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:12,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:13,564 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:13,564 INFO L272 AbstractInterpreter]: Visited 176 different actions 344 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:12:13,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:13,569 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:13,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:13,569 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:12:13,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:13,578 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:13,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:13,922 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 07:12:14,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:12:14,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-11-07 07:12:14,262 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:12:14,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 07:12:14,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 07:12:14,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-11-07 07:12:14,263 INFO L87 Difference]: Start difference. First operand 61639 states and 100418 transitions. Second operand 10 states. [2018-11-07 07:12:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:25,301 INFO L93 Difference]: Finished difference Result 150245 states and 283941 transitions. [2018-11-07 07:12:25,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-07 07:12:25,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 271 [2018-11-07 07:12:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:26,189 INFO L225 Difference]: With dead ends: 150245 [2018-11-07 07:12:26,190 INFO L226 Difference]: Without dead ends: 89030 [2018-11-07 07:12:26,586 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=2763, Unknown=0, NotChecked=0, Total=3422 [2018-11-07 07:12:26,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89030 states. [2018-11-07 07:12:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89030 to 84494. [2018-11-07 07:12:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84494 states. [2018-11-07 07:12:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84494 states to 84494 states and 128623 transitions. [2018-11-07 07:12:30,441 INFO L78 Accepts]: Start accepts. Automaton has 84494 states and 128623 transitions. Word has length 271 [2018-11-07 07:12:30,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:12:30,442 INFO L480 AbstractCegarLoop]: Abstraction has 84494 states and 128623 transitions. [2018-11-07 07:12:30,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 07:12:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 84494 states and 128623 transitions. [2018-11-07 07:12:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-11-07 07:12:30,522 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:12:30,522 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2018-11-07 07:12:30,522 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:12:30,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:30,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1501712098, now seen corresponding path program 1 times [2018-11-07 07:12:30,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:12:30,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:30,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:30,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:12:30,524 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:12:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 130 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:12:30,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:30,843 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:12:30,843 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 286 with the following transitions: [2018-11-07 07:12:30,844 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [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], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:12:30,849 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:12:30,849 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:12:32,127 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:12:32,127 INFO L272 AbstractInterpreter]: Visited 177 different actions 352 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 07:12:32,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:12:32,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:12:32,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:12:32,134 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:12:32,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:12:32,144 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:12:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:12:32,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:12:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-11-07 07:12:32,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:12:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 07:12:33,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:12:33,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 07:12:33,068 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:12:33,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 07:12:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 07:12:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-11-07 07:12:33,070 INFO L87 Difference]: Start difference. First operand 84494 states and 128623 transitions. Second operand 12 states. [2018-11-07 07:12:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:12:52,122 INFO L93 Difference]: Finished difference Result 309582 states and 510317 transitions. [2018-11-07 07:12:52,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-11-07 07:12:52,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2018-11-07 07:12:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:12:53,333 INFO L225 Difference]: With dead ends: 309582 [2018-11-07 07:12:53,333 INFO L226 Difference]: Without dead ends: 225511 [2018-11-07 07:12:53,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1445, Invalid=7867, Unknown=0, NotChecked=0, Total=9312 [2018-11-07 07:12:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225511 states. [2018-11-07 07:13:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225511 to 219752. [2018-11-07 07:13:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219752 states. [2018-11-07 07:13:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219752 states to 219752 states and 316479 transitions. [2018-11-07 07:13:06,902 INFO L78 Accepts]: Start accepts. Automaton has 219752 states and 316479 transitions. Word has length 285 [2018-11-07 07:13:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:13:06,903 INFO L480 AbstractCegarLoop]: Abstraction has 219752 states and 316479 transitions. [2018-11-07 07:13:06,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 07:13:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 219752 states and 316479 transitions. [2018-11-07 07:13:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-11-07 07:13:07,037 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:13:07,037 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 07:13:07,038 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:13:07,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2078743378, now seen corresponding path program 1 times [2018-11-07 07:13:07,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:13:07,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:07,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:07,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:13:07,039 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:13:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 154 proven. 14 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-07 07:13:07,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:07,419 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:13:07,419 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2018-11-07 07:13:07,419 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [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], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:13:07,424 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:13:07,424 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:13:08,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:13:08,424 INFO L272 AbstractInterpreter]: Visited 181 different actions 541 times. Merged at 8 different actions 23 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 07:13:08,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:13:08,430 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:13:08,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:13:08,430 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:13:08,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:13:08,440 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:13:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:13:09,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:13:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-11-07 07:13:09,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:13:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 154 proven. 14 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-07 07:13:09,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:13:09,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-07 07:13:09,574 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:13:09,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 07:13:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 07:13:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 07:13:09,575 INFO L87 Difference]: Start difference. First operand 219752 states and 316479 transitions. Second operand 8 states. [2018-11-07 07:13:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 07:13:28,865 INFO L93 Difference]: Finished difference Result 739893 states and 1120725 transitions. [2018-11-07 07:13:28,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-07 07:13:28,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 303 [2018-11-07 07:13:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 07:13:32,491 INFO L225 Difference]: With dead ends: 739893 [2018-11-07 07:13:32,491 INFO L226 Difference]: Without dead ends: 522677 [2018-11-07 07:13:33,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 626 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 07:13:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522677 states. [2018-11-07 07:13:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522677 to 507889. [2018-11-07 07:13:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507889 states. [2018-11-07 07:14:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507889 states to 507889 states and 646330 transitions. [2018-11-07 07:14:01,757 INFO L78 Accepts]: Start accepts. Automaton has 507889 states and 646330 transitions. Word has length 303 [2018-11-07 07:14:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 07:14:01,758 INFO L480 AbstractCegarLoop]: Abstraction has 507889 states and 646330 transitions. [2018-11-07 07:14:01,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 07:14:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 507889 states and 646330 transitions. [2018-11-07 07:14:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-11-07 07:14:01,906 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 07:14:01,906 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 07:14:01,906 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 07:14:01,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:01,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1864964400, now seen corresponding path program 1 times [2018-11-07 07:14:01,907 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 07:14:01,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:01,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:01,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 07:14:01,909 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 07:14:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:02,528 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 07:14:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 147 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:14:02,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:02,643 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 07:14:02,644 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 305 with the following transitions: [2018-11-07 07:14:02,644 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [115], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [829], [831], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 07:14:02,648 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 07:14:02,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 07:14:03,329 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 07:14:03,329 INFO L272 AbstractInterpreter]: Visited 177 different actions 346 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 07:14:03,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 07:14:03,335 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 07:14:03,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 07:14:03,335 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 07:14:03,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 07:14:03,344 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 07:14:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 07:14:03,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 07:14:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-11-07 07:14:03,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 07:14:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 147 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-07 07:14:03,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 07:14:03,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2018-11-07 07:14:03,879 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 07:14:03,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 07:14:03,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 07:14:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-07 07:14:03,880 INFO L87 Difference]: Start difference. First operand 507889 states and 646330 transitions. Second operand 10 states. Received shutdown request... [2018-11-07 07:14:05,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 07:14:05,072 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 07:14:05,078 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 07:14:05,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:14:05 BoogieIcfgContainer [2018-11-07 07:14:05,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 07:14:05,079 INFO L168 Benchmark]: Toolchain (without parser) took 201094.64 ms. Allocated memory was 1.5 GB in the beginning and 7.1 GB in the end (delta: 5.6 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.9 GB. Max. memory is 7.1 GB. [2018-11-07 07:14:05,080 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. [2018-11-07 07:14:05,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1063.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:05,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 214.39 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -857.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:05,082 INFO L168 Benchmark]: Boogie Preprocessor took 166.30 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 07:14:05,083 INFO L168 Benchmark]: RCFGBuilder took 5082.88 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: 251.0 MB). Peak memory consumption was 251.0 MB. Max. memory is 7.1 GB. [2018-11-07 07:14:05,083 INFO L168 Benchmark]: TraceAbstraction took 194561.93 ms. Allocated memory was 2.3 GB in the beginning and 7.1 GB in the end (delta: 4.8 GB). Free memory was 1.9 GB in the beginning and 3.0 GB in the end (delta: -1.1 GB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. [2018-11-07 07:14:05,088 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 1063.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 214.39 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -857.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.30 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5082.88 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: 251.0 MB). Peak memory consumption was 251.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 194561.93 ms. Allocated memory was 2.3 GB in the beginning and 7.1 GB in the end (delta: 4.8 GB). Free memory was 1.9 GB in the beginning and 3.0 GB in the end (delta: -1.1 GB). Peak memory consumption was 3.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1527]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1527). Cancelled while BasicCegarLoop was constructing difference of abstraction (507889states) and FLOYD_HOARE automaton (currently 13 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (805 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 194.4s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 115.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3298 SDtfs, 22849 SDslu, 4258 SDs, 0 SdLazy, 34295 SolverSat, 7080 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.5s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 5107 GetRequests, 4803 SyntacticMatches, 9 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=507889occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.0s AbstIntTime, 10 AbstIntIterations, 2 AbstIntStrong, 0.9992315401346462 AbsIntWeakeningRatio, 0.27450980392156865 AbsIntAvgWeakeningVarsNumRemoved, 57.96296296296296 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 50.3s AutomataMinimizationTime, 13 MinimizatonAttempts, 27153 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 5440 NumberOfCodeBlocks, 5440 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 7536 ConstructedInterpolants, 0 QuantifiedInterpolants, 4049770 SizeOfPredicates, 42 NumberOfNonLiveVariables, 10084 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 30 InterpolantComputations, 7 PerfectInterpolantSequences, 3599/3872 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown