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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 13:01:56,799 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 13:01:56,804 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 13:01:56,822 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 13:01:56,823 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 13:01:56,824 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 13:01:56,825 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 13:01:56,828 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 13:01:56,831 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 13:01:56,832 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 13:01:56,833 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 13:01:56,833 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 13:01:56,836 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 13:01:56,840 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 13:01:56,842 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 13:01:56,848 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 13:01:56,849 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 13:01:56,854 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 13:01:56,859 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 13:01:56,863 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 13:01:56,864 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 13:01:56,865 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 13:01:56,867 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 13:01:56,867 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 13:01:56,867 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 13:01:56,871 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 13:01:56,872 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 13:01:56,872 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 13:01:56,874 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 13:01:56,876 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 13:01:56,877 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 13:01:56,878 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 13:01:56,878 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 13:01:56,878 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 13:01:56,880 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 13:01:56,881 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 13:01:56,882 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.epf [2018-11-07 13:01:56,913 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 13:01:56,913 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 13:01:56,915 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 13:01:56,915 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 13:01:56,915 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 13:01:56,915 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 13:01:56,915 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 13:01:56,916 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 13:01:56,916 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 13:01:56,916 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 13:01:56,916 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 13:01:56,917 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 13:01:56,918 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 13:01:56,918 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 13:01:56,918 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 13:01:56,919 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 13:01:56,919 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 13:01:56,919 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 13:01:56,919 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 13:01:56,919 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 13:01:56,920 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 13:01:56,921 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 13:01:56,922 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 13:01:56,922 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 13:01:56,922 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 13:01:56,922 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 13:01:56,922 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 13:01:56,923 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 13:01:56,923 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 13:01:56,923 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 13:01:56,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 13:01:56,923 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 13:01:56,924 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 13:01:56,924 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 13:01:56,986 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 13:01:57,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 13:01:57,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 13:01:57,005 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 13:01:57,005 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 13:01:57,006 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-11-07 13:01:57,071 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2034ea794/73c92997ba8b473a8000164ebeccdbd4/FLAGf30d4bea7 [2018-11-07 13:01:57,786 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 13:01:57,788 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-11-07 13:01:57,813 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2034ea794/73c92997ba8b473a8000164ebeccdbd4/FLAGf30d4bea7 [2018-11-07 13:01:57,833 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2034ea794/73c92997ba8b473a8000164ebeccdbd4 [2018-11-07 13:01:57,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 13:01:57,848 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 13:01:57,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 13:01:57,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 13:01:57,853 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 13:01:57,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:57" (1/1) ... [2018-11-07 13:01:57,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429b8899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:57, skipping insertion in model container [2018-11-07 13:01:57,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:01:57" (1/1) ... [2018-11-07 13:01:57,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 13:01:57,995 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 13:01:58,746 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 13:01:58,752 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 13:01:58,997 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 13:01:59,025 INFO L193 MainTranslator]: Completed translation [2018-11-07 13:01:59,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59 WrapperNode [2018-11-07 13:01:59,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 13:01:59,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 13:01:59,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 13:01:59,028 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 13:01:59,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 13:01:59,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 13:01:59,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 13:01:59,254 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 13:01:59,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (1/1) ... [2018-11-07 13:01:59,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 13:01:59,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 13:01:59,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 13:01:59,439 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 13:01:59,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (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 13:01:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 13:01:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 13:01:59,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 13:01:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 13:01:59,515 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 13:01:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 13:01:59,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 13:01:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 13:01:59,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 13:02:04,519 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 13:02:04,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:02:04 BoogieIcfgContainer [2018-11-07 13:02:04,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 13:02:04,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 13:02:04,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 13:02:04,526 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 13:02:04,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:01:57" (1/3) ... [2018-11-07 13:02:04,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19997135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:02:04, skipping insertion in model container [2018-11-07 13:02:04,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:01:59" (2/3) ... [2018-11-07 13:02:04,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19997135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:02:04, skipping insertion in model container [2018-11-07 13:02:04,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:02:04" (3/3) ... [2018-11-07 13:02:04,531 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20_true-unreach-call.c [2018-11-07 13:02:04,541 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 13:02:04,554 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 13:02:04,575 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 13:02:04,630 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 13:02:04,630 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 13:02:04,631 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 13:02:04,631 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 13:02:04,631 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 13:02:04,631 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 13:02:04,631 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 13:02:04,632 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 13:02:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-11-07 13:02:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-11-07 13:02:04,710 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:04,715 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 13:02:04,720 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:04,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash -775720303, now seen corresponding path program 1 times [2018-11-07 13:02:04,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:04,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:04,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:04,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:04,793 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:05,711 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 13:02:06,019 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 13:02:06,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:06,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 13:02:06,022 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:06,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 13:02:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 13:02:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 13:02:06,048 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-11-07 13:02:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:08,259 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-11-07 13:02:08,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 13:02:08,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-11-07 13:02:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:08,286 INFO L225 Difference]: With dead ends: 838 [2018-11-07 13:02:08,286 INFO L226 Difference]: Without dead ends: 524 [2018-11-07 13:02:08,302 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 13:02:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-11-07 13:02:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-11-07 13:02:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-11-07 13:02:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-11-07 13:02:08,429 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 202 [2018-11-07 13:02:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:08,430 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-11-07 13:02:08,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 13:02:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-11-07 13:02:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-07 13:02:08,450 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:08,455 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:02:08,455 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:08,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:08,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1755738424, now seen corresponding path program 1 times [2018-11-07 13:02:08,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:08,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:08,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:08,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:08,459 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:08,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:08,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 13:02:08,918 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:08,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 13:02:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 13:02:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 13:02:08,921 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-11-07 13:02:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:12,977 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-11-07 13:02:12,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 13:02:12,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2018-11-07 13:02:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:12,992 INFO L225 Difference]: With dead ends: 1581 [2018-11-07 13:02:12,993 INFO L226 Difference]: Without dead ends: 1065 [2018-11-07 13:02:12,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 13:02:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-11-07 13:02:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-11-07 13:02:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-11-07 13:02:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-11-07 13:02:13,067 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 212 [2018-11-07 13:02:13,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:13,067 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-11-07 13:02:13,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 13:02:13,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-11-07 13:02:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-07 13:02:13,073 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:13,074 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 13:02:13,074 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:13,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -548370667, now seen corresponding path program 1 times [2018-11-07 13:02:13,075 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:13,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:13,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:13,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:13,076 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:13,453 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 13:02:13,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 13:02:13,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 13:02:13,454 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:13,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 13:02:13,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 13:02:13,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 13:02:13,456 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-11-07 13:02:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:02:16,205 INFO L93 Difference]: Finished difference Result 2903 states and 5102 transitions. [2018-11-07 13:02:16,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 13:02:16,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2018-11-07 13:02:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:02:16,220 INFO L225 Difference]: With dead ends: 2903 [2018-11-07 13:02:16,220 INFO L226 Difference]: Without dead ends: 1886 [2018-11-07 13:02:16,226 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 13:02:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2018-11-07 13:02:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1866. [2018-11-07 13:02:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2018-11-07 13:02:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 3136 transitions. [2018-11-07 13:02:16,291 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 3136 transitions. Word has length 215 [2018-11-07 13:02:16,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:02:16,292 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 3136 transitions. [2018-11-07 13:02:16,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 13:02:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 3136 transitions. [2018-11-07 13:02:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-07 13:02:16,302 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:02:16,302 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:02:16,302 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:02:16,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:16,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1747135276, now seen corresponding path program 1 times [2018-11-07 13:02:16,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:02:16,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:16,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:02:16,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:02:16,304 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:02:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:02:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:02:16,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:02:16,537 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 13:02:16,538 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2018-11-07 13:02:16,541 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1077], [1079], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 13:02:16,618 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 13:02:16,618 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 13:02:37,618 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 13:02:37,620 INFO L272 AbstractInterpreter]: Visited 203 different actions 203 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-11-07 13:02:37,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:02:37,662 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 13:02:51,755 INFO L227 lantSequenceWeakener]: Weakened 224 states. On average, predicates are now at 74.4% of their original sizes. [2018-11-07 13:02:51,756 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 13:02:52,198 INFO L415 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2018-11-07 13:02:52,198 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 13:02:52,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 13:02:52,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2018-11-07 13:02:52,200 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:02:52,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 13:02:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 13:02:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-11-07 13:02:52,201 INFO L87 Difference]: Start difference. First operand 1866 states and 3136 transitions. Second operand 16 states. [2018-11-07 13:03:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:03:31,153 INFO L93 Difference]: Finished difference Result 3936 states and 6627 transitions. [2018-11-07 13:03:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 13:03:31,154 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 233 [2018-11-07 13:03:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:03:31,166 INFO L225 Difference]: With dead ends: 3936 [2018-11-07 13:03:31,166 INFO L226 Difference]: Without dead ends: 2076 [2018-11-07 13:03:31,172 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 235 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-11-07 13:03:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2018-11-07 13:03:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 2074. [2018-11-07 13:03:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2018-11-07 13:03:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3354 transitions. [2018-11-07 13:03:31,231 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3354 transitions. Word has length 233 [2018-11-07 13:03:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:03:31,231 INFO L480 AbstractCegarLoop]: Abstraction has 2074 states and 3354 transitions. [2018-11-07 13:03:31,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 13:03:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3354 transitions. [2018-11-07 13:03:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-11-07 13:03:31,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:03:31,240 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 13:03:31,241 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:03:31,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:03:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1415226935, now seen corresponding path program 1 times [2018-11-07 13:03:31,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:03:31,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:03:31,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:03:31,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:03:31,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:03:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:03:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:03:31,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:03:31,599 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 13:03:31,600 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2018-11-07 13:03:31,601 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1077], [1079], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 13:03:31,620 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 13:03:31,620 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 13:05:08,462 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 13:05:08,462 INFO L272 AbstractInterpreter]: Visited 207 different actions 406 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 13:05:08,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:05:08,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 13:05:08,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:05:08,469 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 13:05:08,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:05:08,481 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 13:05:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:05:08,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 13:05:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 13:05:08,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 13:05:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-07 13:05:09,500 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 13:05:09,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-11-07 13:05:09,501 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 13:05:09,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 13:05:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 13:05:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 13:05:09,503 INFO L87 Difference]: Start difference. First operand 2074 states and 3354 transitions. Second operand 3 states. [2018-11-07 13:05:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 13:05:12,213 INFO L93 Difference]: Finished difference Result 5683 states and 9678 transitions. [2018-11-07 13:05:12,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 13:05:12,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2018-11-07 13:05:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 13:05:12,244 INFO L225 Difference]: With dead ends: 5683 [2018-11-07 13:05:12,245 INFO L226 Difference]: Without dead ends: 3823 [2018-11-07 13:05:12,255 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 482 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-07 13:05:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2018-11-07 13:05:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3821. [2018-11-07 13:05:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2018-11-07 13:05:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 6011 transitions. [2018-11-07 13:05:12,374 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 6011 transitions. Word has length 242 [2018-11-07 13:05:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 13:05:12,375 INFO L480 AbstractCegarLoop]: Abstraction has 3821 states and 6011 transitions. [2018-11-07 13:05:12,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 13:05:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 6011 transitions. [2018-11-07 13:05:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-11-07 13:05:12,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 13:05:12,394 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:05:12,394 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 13:05:12,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 13:05:12,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1659653317, now seen corresponding path program 1 times [2018-11-07 13:05:12,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 13:05:12,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:05:12,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 13:05:12,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 13:05:12,396 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 13:05:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 13:05:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 13:05:12,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 13:05:12,706 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 13:05:12,706 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 269 with the following transitions: [2018-11-07 13:05:12,707 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [151], [156], [158], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1073], [1077], [1079], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-11-07 13:05:12,719 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 13:05:12,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown