java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:58:48,404 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:58:48,407 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:58:48,419 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:58:48,420 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:58:48,421 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:58:48,422 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:58:48,424 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:58:48,426 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:58:48,427 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:58:48,428 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:58:48,428 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:58:48,429 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:58:48,430 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:58:48,431 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:58:48,432 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:58:48,433 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:58:48,435 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:58:48,436 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:58:48,438 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:58:48,439 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:58:48,440 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:58:48,443 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:58:48,443 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:58:48,443 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:58:48,444 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:58:48,445 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:58:48,446 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:58:48,447 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:58:48,448 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:58:48,448 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:58:48,449 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:58:48,449 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:58:48,449 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:58:48,450 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:58:48,451 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:58:48,452 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:58:48,467 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:58:48,467 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:58:48,468 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:58:48,468 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:58:48,468 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:58:48,469 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:58:48,469 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:58:48,469 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:58:48,469 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:58:48,469 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:58:48,470 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:58:48,470 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:58:48,470 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:58:48,471 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:58:48,471 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:58:48,471 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:58:48,471 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:58:48,471 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:58:48,472 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:58:48,472 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:58:48,472 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:58:48,472 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:58:48,472 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:58:48,473 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:58:48,473 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:58:48,473 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:58:48,473 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:58:48,473 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:58:48,474 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:58:48,474 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:58:48,474 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:58:48,474 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:58:48,474 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:58:48,475 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:58:48,475 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:58:48,520 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:58:48,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:58:48,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:58:48,539 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:58:48,539 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:58:48,540 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-11-07 18:58:48,599 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c7921ac/4ab2085cfa834d96b30e77541618fbd8/FLAG1dbec570f [2018-11-07 18:58:49,254 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:58:49,255 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label55_true-unreach-call.c [2018-11-07 18:58:49,273 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c7921ac/4ab2085cfa834d96b30e77541618fbd8/FLAG1dbec570f [2018-11-07 18:58:49,289 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3c7921ac/4ab2085cfa834d96b30e77541618fbd8 [2018-11-07 18:58:49,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:58:49,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:58:49,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:58:49,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:58:49,308 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:58:49,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:58:49" (1/1) ... [2018-11-07 18:58:49,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa5a63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:49, skipping insertion in model container [2018-11-07 18:58:49,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:58:49" (1/1) ... [2018-11-07 18:58:49,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:58:49,427 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:58:50,151 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:58:50,157 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:58:50,434 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:58:50,456 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:58:50,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50 WrapperNode [2018-11-07 18:58:50,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:58:50,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:58:50,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:58:50,459 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:58:50,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:58:50,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:58:50,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:58:50,664 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:58:50,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (1/1) ... [2018-11-07 18:58:50,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:58:50,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:58:50,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:58:50,821 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:58:50,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (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 18:58:50,889 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:58:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:58:50,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:58:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:58:50,890 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:58:50,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:58:50,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:58:50,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:58:50,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:58:56,051 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:58:56,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:58:56 BoogieIcfgContainer [2018-11-07 18:58:56,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:58:56,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:58:56,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:58:56,059 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:58:56,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:58:49" (1/3) ... [2018-11-07 18:58:56,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d6ec7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:58:56, skipping insertion in model container [2018-11-07 18:58:56,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:58:50" (2/3) ... [2018-11-07 18:58:56,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d6ec7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:58:56, skipping insertion in model container [2018-11-07 18:58:56,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:58:56" (3/3) ... [2018-11-07 18:58:56,065 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55_true-unreach-call.c [2018-11-07 18:58:56,076 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:58:56,090 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:58:56,108 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:58:56,161 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:58:56,162 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:58:56,162 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:58:56,162 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:58:56,162 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:58:56,162 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:58:56,162 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:58:56,163 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:58:56,209 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 18:58:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-07 18:58:56,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:56,238 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] [2018-11-07 18:58:56,243 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:56,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1276853404, now seen corresponding path program 1 times [2018-11-07 18:58:56,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:56,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:56,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:56,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:56,318 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:58:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:58:57,271 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:58:57,418 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 18:58:57,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:58:57,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:58:57,421 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:58:57,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:58:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:58:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:58:57,448 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 18:58:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:58:59,834 INFO L93 Difference]: Finished difference Result 844 states and 1489 transitions. [2018-11-07 18:58:59,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:58:59,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2018-11-07 18:58:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:58:59,858 INFO L225 Difference]: With dead ends: 844 [2018-11-07 18:58:59,858 INFO L226 Difference]: Without dead ends: 530 [2018-11-07 18:58:59,865 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 18:58:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-11-07 18:58:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2018-11-07 18:58:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2018-11-07 18:58:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 865 transitions. [2018-11-07 18:58:59,967 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 865 transitions. Word has length 169 [2018-11-07 18:58:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:58:59,968 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 865 transitions. [2018-11-07 18:58:59,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:58:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 865 transitions. [2018-11-07 18:58:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-07 18:58:59,976 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:58:59,976 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] [2018-11-07 18:58:59,977 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:58:59,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:58:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash 15466080, now seen corresponding path program 1 times [2018-11-07 18:58:59,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:58:59,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:59,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:58:59,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:58:59,979 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:00,402 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 18:59:00,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:59:00,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:59:00,403 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:00,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:59:00,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:59:00,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:59:00,406 INFO L87 Difference]: Start difference. First operand 525 states and 865 transitions. Second operand 3 states. [2018-11-07 18:59:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:02,036 INFO L93 Difference]: Finished difference Result 1473 states and 2496 transitions. [2018-11-07 18:59:02,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:59:02,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 182 [2018-11-07 18:59:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:02,045 INFO L225 Difference]: With dead ends: 1473 [2018-11-07 18:59:02,046 INFO L226 Difference]: Without dead ends: 954 [2018-11-07 18:59:02,055 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:59:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-11-07 18:59:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 952. [2018-11-07 18:59:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-11-07 18:59:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1496 transitions. [2018-11-07 18:59:02,110 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1496 transitions. Word has length 182 [2018-11-07 18:59:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:02,110 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 1496 transitions. [2018-11-07 18:59:02,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:59:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1496 transitions. [2018-11-07 18:59:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-07 18:59:02,116 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:02,116 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:59:02,116 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:02,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1708917764, now seen corresponding path program 1 times [2018-11-07 18:59:02,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:02,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:02,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:02,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:02,118 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:02,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:59:02,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 18:59:02,703 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:02,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 18:59:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 18:59:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:59:02,710 INFO L87 Difference]: Start difference. First operand 952 states and 1496 transitions. Second operand 5 states. [2018-11-07 18:59:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:09,192 INFO L93 Difference]: Finished difference Result 4008 states and 6512 transitions. [2018-11-07 18:59:09,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 18:59:09,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2018-11-07 18:59:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:09,234 INFO L225 Difference]: With dead ends: 4008 [2018-11-07 18:59:09,234 INFO L226 Difference]: Without dead ends: 3062 [2018-11-07 18:59:09,242 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-07 18:59:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2018-11-07 18:59:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3052. [2018-11-07 18:59:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3052 states. [2018-11-07 18:59:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4689 transitions. [2018-11-07 18:59:09,390 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4689 transitions. Word has length 184 [2018-11-07 18:59:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:09,391 INFO L480 AbstractCegarLoop]: Abstraction has 3052 states and 4689 transitions. [2018-11-07 18:59:09,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 18:59:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4689 transitions. [2018-11-07 18:59:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-07 18:59:09,407 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:09,407 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:59:09,408 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:09,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1523085736, now seen corresponding path program 1 times [2018-11-07 18:59:09,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:09,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:09,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:09,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:09,411 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:09,708 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:59:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:09,907 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:59:09,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 18:59:09,908 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:09,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:59:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:59:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:59:09,910 INFO L87 Difference]: Start difference. First operand 3052 states and 4689 transitions. Second operand 7 states. [2018-11-07 18:59:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:13,088 INFO L93 Difference]: Finished difference Result 9246 states and 16253 transitions. [2018-11-07 18:59:13,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:59:13,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2018-11-07 18:59:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:13,158 INFO L225 Difference]: With dead ends: 9246 [2018-11-07 18:59:13,158 INFO L226 Difference]: Without dead ends: 6200 [2018-11-07 18:59:13,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:59:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2018-11-07 18:59:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 5920. [2018-11-07 18:59:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5920 states. [2018-11-07 18:59:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 9451 transitions. [2018-11-07 18:59:13,469 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 9451 transitions. Word has length 186 [2018-11-07 18:59:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:13,470 INFO L480 AbstractCegarLoop]: Abstraction has 5920 states and 9451 transitions. [2018-11-07 18:59:13,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:59:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 9451 transitions. [2018-11-07 18:59:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-11-07 18:59:13,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:13,489 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:59:13,489 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:13,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1271032685, now seen corresponding path program 1 times [2018-11-07 18:59:13,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:13,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:13,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:13,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:13,491 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:13,728 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-07 18:59:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:14,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:59:14,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:59:14,003 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:14,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:59:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:59:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:59:14,004 INFO L87 Difference]: Start difference. First operand 5920 states and 9451 transitions. Second operand 6 states. [2018-11-07 18:59:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:17,388 INFO L93 Difference]: Finished difference Result 18028 states and 31530 transitions. [2018-11-07 18:59:17,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:59:17,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2018-11-07 18:59:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:17,479 INFO L225 Difference]: With dead ends: 18028 [2018-11-07 18:59:17,480 INFO L226 Difference]: Without dead ends: 12114 [2018-11-07 18:59:17,508 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 18:59:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12114 states. [2018-11-07 18:59:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12114 to 11840. [2018-11-07 18:59:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11840 states. [2018-11-07 18:59:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11840 states to 11840 states and 19227 transitions. [2018-11-07 18:59:18,090 INFO L78 Accepts]: Start accepts. Automaton has 11840 states and 19227 transitions. Word has length 187 [2018-11-07 18:59:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:18,091 INFO L480 AbstractCegarLoop]: Abstraction has 11840 states and 19227 transitions. [2018-11-07 18:59:18,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:59:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 11840 states and 19227 transitions. [2018-11-07 18:59:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-11-07 18:59:18,130 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:18,131 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:59:18,131 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:18,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1769410092, now seen corresponding path program 1 times [2018-11-07 18:59:18,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:18,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:18,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:18,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:18,133 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:18,709 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:59:19,175 WARN L179 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:59:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:19,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:19,304 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:19,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 200 with the following transitions: [2018-11-07 18:59:19,307 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:19,395 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:19,396 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:21,022 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:59:21,024 INFO L272 AbstractInterpreter]: Visited 170 different actions 170 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 18:59:21,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:21,070 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:59:22,319 INFO L227 lantSequenceWeakener]: Weakened 190 states. On average, predicates are now at 71.6% of their original sizes. [2018-11-07 18:59:22,320 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:59:23,293 INFO L415 sIntCurrentIteration]: We unified 198 AI predicates to 198 [2018-11-07 18:59:23,293 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:59:23,294 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:59:23,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [8] total 22 [2018-11-07 18:59:23,295 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:59:23,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 18:59:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 18:59:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:59:23,296 INFO L87 Difference]: Start difference. First operand 11840 states and 19227 transitions. Second operand 16 states. [2018-11-07 18:59:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:59:51,196 INFO L93 Difference]: Finished difference Result 23884 states and 38808 transitions. [2018-11-07 18:59:51,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:59:51,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 199 [2018-11-07 18:59:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:59:51,247 INFO L225 Difference]: With dead ends: 23884 [2018-11-07 18:59:51,247 INFO L226 Difference]: Without dead ends: 12050 [2018-11-07 18:59:51,286 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 201 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:59:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12050 states. [2018-11-07 18:59:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12050 to 12048. [2018-11-07 18:59:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12048 states. [2018-11-07 18:59:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 19444 transitions. [2018-11-07 18:59:51,684 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 19444 transitions. Word has length 199 [2018-11-07 18:59:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:59:51,684 INFO L480 AbstractCegarLoop]: Abstraction has 12048 states and 19444 transitions. [2018-11-07 18:59:51,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 18:59:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 19444 transitions. [2018-11-07 18:59:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-07 18:59:51,719 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:59:51,720 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:59:51,720 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:59:51,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 515488759, now seen corresponding path program 1 times [2018-11-07 18:59:51,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:59:51,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:51,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:51,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:59:51,722 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:59:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:52,227 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:59:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:59:52,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:52,413 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:59:52,413 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-11-07 18:59:52,414 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 18:59:52,431 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:59:52,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:59:54,088 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:59:54,089 INFO L272 AbstractInterpreter]: Visited 174 different actions 340 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 18:59:54,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:59:54,097 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:59:54,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:59:54,097 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 18:59:54,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:59:54,111 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:59:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:59:54,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:59:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:59:54,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:59:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:59:55,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:59:55,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-11-07 18:59:55,209 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:59:55,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:59:55,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:59:55,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:59:55,210 INFO L87 Difference]: Start difference. First operand 12048 states and 19444 transitions. Second operand 8 states. [2018-11-07 18:59:56,653 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 18:59:58,988 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 19:00:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 19:00:05,790 INFO L93 Difference]: Finished difference Result 41321 states and 80839 transitions. [2018-11-07 19:00:05,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-07 19:00:05,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 208 [2018-11-07 19:00:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 19:00:06,008 INFO L225 Difference]: With dead ends: 41321 [2018-11-07 19:00:06,009 INFO L226 Difference]: Without dead ends: 29487 [2018-11-07 19:00:06,126 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 430 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 19:00:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29487 states. [2018-11-07 19:00:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29487 to 28552. [2018-11-07 19:00:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28552 states. [2018-11-07 19:00:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28552 states to 28552 states and 42359 transitions. [2018-11-07 19:00:07,880 INFO L78 Accepts]: Start accepts. Automaton has 28552 states and 42359 transitions. Word has length 208 [2018-11-07 19:00:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 19:00:07,880 INFO L480 AbstractCegarLoop]: Abstraction has 28552 states and 42359 transitions. [2018-11-07 19:00:07,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 19:00:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28552 states and 42359 transitions. [2018-11-07 19:00:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-07 19:00:07,946 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 19:00:07,946 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 19:00:07,947 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 19:00:07,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:00:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1272963469, now seen corresponding path program 1 times [2018-11-07 19:00:07,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 19:00:07,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:00:07,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:00:07,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:00:07,950 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 19:00:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:00:08,249 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 19:00:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-07 19:00:08,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:00:08,673 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 19:00:08,673 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2018-11-07 19:00:08,675 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [44], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 19:00:08,692 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 19:00:08,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 19:00:11,477 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 19:00:11,477 INFO L272 AbstractInterpreter]: Visited 174 different actions 344 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 19:00:11,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:00:11,504 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 19:00:13,119 INFO L227 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 77.86% of their original sizes. [2018-11-07 19:00:13,119 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 19:00:14,065 INFO L415 sIntCurrentIteration]: We unified 222 AI predicates to 222 [2018-11-07 19:00:14,065 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 19:00:14,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 19:00:14,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 19:00:14,066 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 19:00:14,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 19:00:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 19:00:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2018-11-07 19:00:14,068 INFO L87 Difference]: Start difference. First operand 28552 states and 42359 transitions. Second operand 22 states. [2018-11-07 19:01:11,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 19:01:11,512 INFO L93 Difference]: Finished difference Result 55707 states and 82933 transitions. [2018-11-07 19:01:11,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-07 19:01:11,513 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 223 [2018-11-07 19:01:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 19:01:11,593 INFO L225 Difference]: With dead ends: 55707 [2018-11-07 19:01:11,593 INFO L226 Difference]: Without dead ends: 27369 [2018-11-07 19:01:11,635 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 231 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2018-11-07 19:01:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27369 states. [2018-11-07 19:01:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27369 to 27360. [2018-11-07 19:01:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27360 states. [2018-11-07 19:01:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 40309 transitions. [2018-11-07 19:01:12,264 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 40309 transitions. Word has length 223 [2018-11-07 19:01:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 19:01:12,265 INFO L480 AbstractCegarLoop]: Abstraction has 27360 states and 40309 transitions. [2018-11-07 19:01:12,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 19:01:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 40309 transitions. [2018-11-07 19:01:12,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-07 19:01:12,312 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 19:01:12,312 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 19:01:12,312 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 19:01:12,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:01:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1496366192, now seen corresponding path program 1 times [2018-11-07 19:01:12,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 19:01:12,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:01:12,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:01:12,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:01:12,317 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 19:01:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:01:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 94 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-11-07 19:01:12,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:01:12,652 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 19:01:12,652 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-07 19:01:12,652 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [48], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 19:01:12,659 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 19:01:12,659 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 19:01:14,752 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 19:01:14,752 INFO L272 AbstractInterpreter]: Visited 176 different actions 347 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 19:01:14,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:01:14,760 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 19:01:14,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:01:14,760 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 19:01:14,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:01:14,773 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 19:01:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:01:14,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 19:01:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-07 19:01:15,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 19:01:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-07 19:01:15,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 19:01:15,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 19:01:15,291 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 19:01:15,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 19:01:15,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 19:01:15,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-07 19:01:15,293 INFO L87 Difference]: Start difference. First operand 27360 states and 40309 transitions. Second operand 9 states. [2018-11-07 19:01:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 19:01:18,043 INFO L93 Difference]: Finished difference Result 44154 states and 64994 transitions. [2018-11-07 19:01:18,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 19:01:18,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 251 [2018-11-07 19:01:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 19:01:18,094 INFO L225 Difference]: With dead ends: 44154 [2018-11-07 19:01:18,094 INFO L226 Difference]: Without dead ends: 18392 [2018-11-07 19:01:18,142 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 501 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-07 19:01:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18392 states. [2018-11-07 19:01:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18392 to 15864. [2018-11-07 19:01:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15864 states. [2018-11-07 19:01:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15864 states to 15864 states and 19958 transitions. [2018-11-07 19:01:18,526 INFO L78 Accepts]: Start accepts. Automaton has 15864 states and 19958 transitions. Word has length 251 [2018-11-07 19:01:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 19:01:18,526 INFO L480 AbstractCegarLoop]: Abstraction has 15864 states and 19958 transitions. [2018-11-07 19:01:18,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 19:01:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15864 states and 19958 transitions. [2018-11-07 19:01:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-11-07 19:01:18,542 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 19:01:18,543 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:18,543 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 19:01:18,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:01:18,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1460650671, now seen corresponding path program 1 times [2018-11-07 19:01:18,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 19:01:18,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:01:18,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:01:18,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:01:18,546 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 19:01:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:01:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 101 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 19:01:19,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:01:19,027 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 19:01:19,027 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-11-07 19:01:19,027 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [44], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [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], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 19:01:19,032 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 19:01:19,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 19:01:22,082 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 19:01:22,083 INFO L272 AbstractInterpreter]: Visited 175 different actions 519 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-11-07 19:01:22,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:01:22,108 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 19:01:22,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:01:22,108 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 19:01:22,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:01:22,116 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 19:01:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:01:22,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 19:01:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 19:01:22,795 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 19:01:22,922 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-11-07 19:01:23,098 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 19:01:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-07 19:01:23,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 19:01:23,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2018-11-07 19:01:23,431 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 19:01:23,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 19:01:23,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 19:01:23,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-11-07 19:01:23,432 INFO L87 Difference]: Start difference. First operand 15864 states and 19958 transitions. Second operand 12 states. [2018-11-07 19:01:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 19:01:36,292 INFO L93 Difference]: Finished difference Result 58102 states and 86411 transitions. [2018-11-07 19:01:36,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-11-07 19:01:36,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 254 [2018-11-07 19:01:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 19:01:36,522 INFO L225 Difference]: With dead ends: 58102 [2018-11-07 19:01:36,522 INFO L226 Difference]: Without dead ends: 43739 [2018-11-07 19:01:36,590 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 570 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3097 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1387, Invalid=7169, Unknown=0, NotChecked=0, Total=8556 [2018-11-07 19:01:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43739 states. [2018-11-07 19:01:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43739 to 39860. [2018-11-07 19:01:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39860 states. [2018-11-07 19:01:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39860 states to 39860 states and 50210 transitions. [2018-11-07 19:01:37,879 INFO L78 Accepts]: Start accepts. Automaton has 39860 states and 50210 transitions. Word has length 254 [2018-11-07 19:01:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 19:01:37,880 INFO L480 AbstractCegarLoop]: Abstraction has 39860 states and 50210 transitions. [2018-11-07 19:01:37,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 19:01:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 39860 states and 50210 transitions. [2018-11-07 19:01:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-07 19:01:37,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 19:01:37,904 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 19:01:37,905 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 19:01:37,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:01:37,905 INFO L82 PathProgramCache]: Analyzing trace with hash 753374301, now seen corresponding path program 1 times [2018-11-07 19:01:37,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 19:01:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:01:37,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:01:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:01:37,907 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 19:01:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:01:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 19:01:38,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:01:38,568 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 19:01:38,568 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2018-11-07 19:01:38,568 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 19:01:38,574 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 19:01:38,574 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 19:01:40,641 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 19:01:40,642 INFO L272 AbstractInterpreter]: Visited 173 different actions 342 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-11-07 19:01:40,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:01:40,649 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 19:01:41,794 INFO L227 lantSequenceWeakener]: Weakened 304 states. On average, predicates are now at 70.96% of their original sizes. [2018-11-07 19:01:41,795 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 19:01:42,213 INFO L415 sIntCurrentIteration]: We unified 306 AI predicates to 306 [2018-11-07 19:01:42,213 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 19:01:42,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 19:01:42,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-11-07 19:01:42,214 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 19:01:42,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 19:01:42,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 19:01:42,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-07 19:01:42,215 INFO L87 Difference]: Start difference. First operand 39860 states and 50210 transitions. Second operand 20 states. [2018-11-07 19:02:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 19:02:15,867 INFO L93 Difference]: Finished difference Result 81805 states and 104253 transitions. [2018-11-07 19:02:15,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 19:02:15,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 307 [2018-11-07 19:02:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 19:02:16,007 INFO L225 Difference]: With dead ends: 81805 [2018-11-07 19:02:16,007 INFO L226 Difference]: Without dead ends: 46974 [2018-11-07 19:02:16,064 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 315 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2018-11-07 19:02:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46974 states. [2018-11-07 19:02:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46974 to 46803. [2018-11-07 19:02:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46803 states. [2018-11-07 19:02:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46803 states to 46803 states and 58298 transitions. [2018-11-07 19:02:17,087 INFO L78 Accepts]: Start accepts. Automaton has 46803 states and 58298 transitions. Word has length 307 [2018-11-07 19:02:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 19:02:17,088 INFO L480 AbstractCegarLoop]: Abstraction has 46803 states and 58298 transitions. [2018-11-07 19:02:17,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 19:02:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 46803 states and 58298 transitions. [2018-11-07 19:02:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-11-07 19:02:17,117 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 19:02:17,117 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 19:02:17,117 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 19:02:17,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:02:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1369611910, now seen corresponding path program 1 times [2018-11-07 19:02:17,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 19:02:17,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:02:17,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:02:17,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 19:02:17,119 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 19:02:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:02:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 147 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 19:02:18,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:02:18,314 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 19:02:18,314 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 320 with the following transitions: [2018-11-07 19:02:18,314 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], [131], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [813], [815], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 19:02:18,320 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 19:02:18,321 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 19:02:23,775 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 19:02:23,775 INFO L272 AbstractInterpreter]: Visited 175 different actions 872 times. Merged at 8 different actions 44 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 88 variables. [2018-11-07 19:02:23,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 19:02:23,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 19:02:23,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 19:02:23,782 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 19:02:23,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 19:02:23,792 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 19:02:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 19:02:24,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 19:02:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-11-07 19:02:24,491 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 19:02:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 156 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-07 19:02:24,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 19:02:24,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-11-07 19:02:24,670 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 19:02:24,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 19:02:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 19:02:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-07 19:02:24,672 INFO L87 Difference]: Start difference. First operand 46803 states and 58298 transitions. Second operand 12 states. [2018-11-07 19:02:25,040 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 Received shutdown request... [2018-11-07 19:02:26,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 19:02:26,590 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 19:02:26,597 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 19:02:26,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:02:26 BoogieIcfgContainer [2018-11-07 19:02:26,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 19:02:26,598 INFO L168 Benchmark]: Toolchain (without parser) took 217296.33 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: -38.6 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-07 19:02:26,599 INFO L168 Benchmark]: CDTParser took 0.22 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 19:02:26,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1153.67 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-11-07 19:02:26,600 INFO L168 Benchmark]: Boogie Procedure Inliner took 204.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -872.9 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2018-11-07 19:02:26,601 INFO L168 Benchmark]: Boogie Preprocessor took 157.01 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 19:02:26,602 INFO L168 Benchmark]: RCFGBuilder took 5233.50 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: 259.5 MB). Peak memory consumption was 259.5 MB. Max. memory is 7.1 GB. [2018-11-07 19:02:26,603 INFO L168 Benchmark]: TraceAbstraction took 210542.01 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.4 GB in the end (delta: 479.6 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-07 19:02:26,607 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1153.67 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 204.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -872.9 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.01 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 5233.50 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: 259.5 MB). Peak memory consumption was 259.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210542.01 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 1.4 GB in the end (delta: 479.6 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1521]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1521). Cancelled while BasicCegarLoop was constructing difference of abstraction (46803states) and FLOYD_HOARE automaton (currently 17 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (1076 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 210.4s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 165.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2983 SDtfs, 21959 SDslu, 3427 SDs, 0 SdLazy, 28984 SolverSat, 5879 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98.9s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 3104 GetRequests, 2829 SyntacticMatches, 15 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46803occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 19.0s AbstIntTime, 7 AbstIntIterations, 3 AbstIntStrong, 0.9990372633221354 AbsIntWeakeningRatio, 0.2727272727272727 AbsIntAvgWeakeningVarsNumRemoved, 55.892561983471076 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.6s AutomataMinimizationTime, 11 MinimizatonAttempts, 8095 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 3701 NumberOfCodeBlocks, 3701 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 4713 ConstructedInterpolants, 0 QuantifiedInterpolants, 2841460 SizeOfPredicates, 10 NumberOfNonLiveVariables, 4945 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 1810/2024 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown