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/Problem11_label28_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:10:02,970 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:10:02,972 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:10:02,984 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:10:02,984 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:10:02,985 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:10:02,987 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:10:02,989 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:10:02,990 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:10:02,991 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:10:02,992 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:10:02,992 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:10:02,993 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:10:02,994 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:10:02,996 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:10:02,996 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:10:02,997 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:10:02,999 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:10:03,001 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:10:03,003 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:10:03,004 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:10:03,005 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:10:03,007 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:10:03,008 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:10:03,008 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:10:03,009 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:10:03,010 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:10:03,010 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:10:03,011 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:10:03,012 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:10:03,012 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:10:03,013 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:10:03,013 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:10:03,014 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:10:03,015 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:10:03,015 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:10:03,016 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 20:10:03,031 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:10:03,032 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:10:03,033 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:10:03,033 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:10:03,033 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:10:03,033 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:10:03,033 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:10:03,034 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:10:03,034 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:10:03,034 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:10:03,034 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:10:03,034 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:10:03,035 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:10:03,035 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:10:03,035 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:10:03,036 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:10:03,036 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:10:03,036 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:10:03,036 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:10:03,036 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:10:03,037 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:10:03,037 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:10:03,037 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:10:03,037 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:10:03,037 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:10:03,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:10:03,038 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:10:03,038 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:10:03,038 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:10:03,038 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:10:03,038 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:10:03,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:10:03,039 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:10:03,039 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:10:03,039 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:10:03,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:10:03,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:10:03,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:10:03,106 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:10:03,107 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:10:03,108 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c [2018-11-07 20:10:03,167 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93df09a94/b6f3e988be8f44ceb99a774a7b335b14/FLAGeb002daa5 [2018-11-07 20:10:03,806 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:10:03,807 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28_true-unreach-call.c [2018-11-07 20:10:03,825 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93df09a94/b6f3e988be8f44ceb99a774a7b335b14/FLAGeb002daa5 [2018-11-07 20:10:03,846 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93df09a94/b6f3e988be8f44ceb99a774a7b335b14 [2018-11-07 20:10:03,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:10:03,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:10:03,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:10:03,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:10:03,870 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:10:03,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:10:03" (1/1) ... [2018-11-07 20:10:03,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b49af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:03, skipping insertion in model container [2018-11-07 20:10:03,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:10:03" (1/1) ... [2018-11-07 20:10:03,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:10:03,954 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:10:04,533 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:10:04,541 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:10:04,728 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:10:04,748 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:10:04,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04 WrapperNode [2018-11-07 20:10:04,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:10:04,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:10:04,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:10:04,750 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:10:04,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:04,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:04,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:10:04,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:10:04,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:10:04,939 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:10:04,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:04,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:04,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:04,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:05,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:05,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:05,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (1/1) ... [2018-11-07 20:10:05,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:10:05,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:10:05,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:10:05,056 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:10:05,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (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 20:10:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:10:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:10:05,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:10:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:10:05,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:10:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:10:05,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:10:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:10:05,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:10:09,520 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:10:09,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:10:09 BoogieIcfgContainer [2018-11-07 20:10:09,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:10:09,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:10:09,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:10:09,526 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:10:09,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:10:03" (1/3) ... [2018-11-07 20:10:09,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568ebfb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:10:09, skipping insertion in model container [2018-11-07 20:10:09,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:04" (2/3) ... [2018-11-07 20:10:09,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568ebfb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:10:09, skipping insertion in model container [2018-11-07 20:10:09,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:10:09" (3/3) ... [2018-11-07 20:10:09,530 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label28_true-unreach-call.c [2018-11-07 20:10:09,539 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:10:09,549 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:10:09,566 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:10:09,607 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:10:09,607 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:10:09,607 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:10:09,608 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:10:09,608 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:10:09,608 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:10:09,608 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:10:09,608 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:10:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 20:10:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-07 20:10:09,655 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:10:09,656 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] [2018-11-07 20:10:09,659 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:10:09,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash -718311439, now seen corresponding path program 1 times [2018-11-07 20:10:09,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:10:09,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:09,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:10:09,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:09,726 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:10:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:10:10,176 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 20:10:10,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:10:10,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:10:10,179 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:10:10,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:10:10,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:10:10,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:10:10,206 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 20:10:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:10:13,729 INFO L93 Difference]: Finished difference Result 982 states and 1758 transitions. [2018-11-07 20:10:13,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:10:13,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-11-07 20:10:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:10:13,755 INFO L225 Difference]: With dead ends: 982 [2018-11-07 20:10:13,756 INFO L226 Difference]: Without dead ends: 683 [2018-11-07 20:10:13,766 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:10:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-11-07 20:10:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2018-11-07 20:10:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2018-11-07 20:10:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1005 transitions. [2018-11-07 20:10:13,888 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1005 transitions. Word has length 55 [2018-11-07 20:10:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:10:13,889 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 1005 transitions. [2018-11-07 20:10:13,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:10:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1005 transitions. [2018-11-07 20:10:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-07 20:10:13,897 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:10:13,898 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:10:13,898 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:10:13,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:13,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2084126164, now seen corresponding path program 1 times [2018-11-07 20:10:13,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:10:13,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:13,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:10:13,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:13,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:10:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:10:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:10:14,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:10:14,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:10:14,243 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:10:14,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:10:14,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:10:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:10:14,246 INFO L87 Difference]: Start difference. First operand 683 states and 1005 transitions. Second operand 4 states. [2018-11-07 20:10:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:10:17,956 INFO L93 Difference]: Finished difference Result 2512 states and 3858 transitions. [2018-11-07 20:10:17,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:10:17,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2018-11-07 20:10:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:10:17,973 INFO L225 Difference]: With dead ends: 2512 [2018-11-07 20:10:17,973 INFO L226 Difference]: Without dead ends: 1835 [2018-11-07 20:10:17,980 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:10:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2018-11-07 20:10:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1820. [2018-11-07 20:10:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1820 states. [2018-11-07 20:10:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2585 transitions. [2018-11-07 20:10:18,086 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2585 transitions. Word has length 129 [2018-11-07 20:10:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:10:18,087 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 2585 transitions. [2018-11-07 20:10:18,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:10:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2585 transitions. [2018-11-07 20:10:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 20:10:18,101 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:10:18,102 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:10:18,102 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:10:18,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:18,103 INFO L82 PathProgramCache]: Analyzing trace with hash 643157075, now seen corresponding path program 1 times [2018-11-07 20:10:18,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:10:18,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:18,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:10:18,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:18,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:10:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:10:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:10:18,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:10:18,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:10:18,368 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:10:18,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:10:18,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:10:18,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:10:18,369 INFO L87 Difference]: Start difference. First operand 1820 states and 2585 transitions. Second operand 6 states. [2018-11-07 20:10:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:10:22,717 INFO L93 Difference]: Finished difference Result 6276 states and 9168 transitions. [2018-11-07 20:10:22,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:10:22,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-07 20:10:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:10:22,751 INFO L225 Difference]: With dead ends: 6276 [2018-11-07 20:10:22,751 INFO L226 Difference]: Without dead ends: 4462 [2018-11-07 20:10:22,776 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:10:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2018-11-07 20:10:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4307. [2018-11-07 20:10:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2018-11-07 20:10:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5763 transitions. [2018-11-07 20:10:22,921 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5763 transitions. Word has length 136 [2018-11-07 20:10:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:10:22,922 INFO L480 AbstractCegarLoop]: Abstraction has 4307 states and 5763 transitions. [2018-11-07 20:10:22,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:10:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5763 transitions. [2018-11-07 20:10:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-07 20:10:22,935 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:10:22,935 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2018-11-07 20:10:22,935 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:10:22,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:22,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1736454008, now seen corresponding path program 1 times [2018-11-07 20:10:22,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:10:22,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:22,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:10:22,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:22,937 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:10:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:10:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:10:23,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:10:23,545 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:10:23,546 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-07 20:10:23,548 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:10:23,596 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:10:23,596 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:10:24,112 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:10:24,114 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 20:10:24,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:24,163 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:10:24,903 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 73.64% of their original sizes. [2018-11-07 20:10:24,904 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:10:25,280 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-11-07 20:10:25,280 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:10:25,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:10:25,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 20:10:25,282 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:10:25,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:10:25,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:10:25,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:10:25,283 INFO L87 Difference]: Start difference. First operand 4307 states and 5763 transitions. Second operand 7 states. [2018-11-07 20:10:28,085 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:10:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:10:39,117 INFO L93 Difference]: Finished difference Result 8800 states and 11737 transitions. [2018-11-07 20:10:39,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:10:39,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 210 [2018-11-07 20:10:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:10:39,145 INFO L225 Difference]: With dead ends: 8800 [2018-11-07 20:10:39,145 INFO L226 Difference]: Without dead ends: 4499 [2018-11-07 20:10:39,163 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 210 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:10:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4499 states. [2018-11-07 20:10:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4499 to 4497. [2018-11-07 20:10:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4497 states. [2018-11-07 20:10:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 5963 transitions. [2018-11-07 20:10:39,272 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 5963 transitions. Word has length 210 [2018-11-07 20:10:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:10:39,272 INFO L480 AbstractCegarLoop]: Abstraction has 4497 states and 5963 transitions. [2018-11-07 20:10:39,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:10:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 5963 transitions. [2018-11-07 20:10:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-11-07 20:10:39,281 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:10:39,282 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:10:39,282 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:10:39,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1439039131, now seen corresponding path program 1 times [2018-11-07 20:10:39,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:10:39,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:39,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:10:39,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:10:39,284 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:10:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:10:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-07 20:10:40,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:10:40,306 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:10:40,306 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2018-11-07 20:10:40,307 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:10:40,317 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:10:40,318 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:10:40,457 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:10:40,973 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:10:40,973 INFO L272 AbstractInterpreter]: Visited 126 different actions 495 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:10:41,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:10:41,013 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:10:41,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:10:41,014 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 20:10:41,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:10:41,028 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:10:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:10:41,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:10:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:10:41,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:10:42,254 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 20:10:42,385 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 20:10:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:10:43,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:10:43,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 20:10:43,072 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:10:43,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:10:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:10:43,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-07 20:10:43,075 INFO L87 Difference]: Start difference. First operand 4497 states and 5963 transitions. Second operand 10 states. [2018-11-07 20:10:43,625 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:11:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:11:00,515 INFO L93 Difference]: Finished difference Result 22654 states and 33180 transitions. [2018-11-07 20:11:00,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-07 20:11:00,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 253 [2018-11-07 20:11:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:11:00,604 INFO L225 Difference]: With dead ends: 22654 [2018-11-07 20:11:00,604 INFO L226 Difference]: Without dead ends: 18353 [2018-11-07 20:11:00,661 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 527 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=732, Invalid=3174, Unknown=0, NotChecked=0, Total=3906 [2018-11-07 20:11:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2018-11-07 20:11:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 17709. [2018-11-07 20:11:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17709 states. [2018-11-07 20:11:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 22723 transitions. [2018-11-07 20:11:01,079 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 22723 transitions. Word has length 253 [2018-11-07 20:11:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:11:01,080 INFO L480 AbstractCegarLoop]: Abstraction has 17709 states and 22723 transitions. [2018-11-07 20:11:01,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:11:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 22723 transitions. [2018-11-07 20:11:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-07 20:11:01,101 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:11:01,102 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:11:01,102 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:11:01,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1247546700, now seen corresponding path program 1 times [2018-11-07 20:11:01,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:11:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:01,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:01,104 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:11:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-07 20:11:01,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:11:01,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:11:01,377 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:11:01,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:11:01,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:11:01,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:11:01,378 INFO L87 Difference]: Start difference. First operand 17709 states and 22723 transitions. Second operand 3 states. [2018-11-07 20:11:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:11:04,166 INFO L93 Difference]: Finished difference Result 39441 states and 51783 transitions. [2018-11-07 20:11:04,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:11:04,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2018-11-07 20:11:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:11:04,257 INFO L225 Difference]: With dead ends: 39441 [2018-11-07 20:11:04,258 INFO L226 Difference]: Without dead ends: 22117 [2018-11-07 20:11:04,300 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 20:11:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22117 states. [2018-11-07 20:11:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22117 to 21912. [2018-11-07 20:11:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21912 states. [2018-11-07 20:11:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21912 states to 21912 states and 28120 transitions. [2018-11-07 20:11:04,750 INFO L78 Accepts]: Start accepts. Automaton has 21912 states and 28120 transitions. Word has length 295 [2018-11-07 20:11:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:11:04,751 INFO L480 AbstractCegarLoop]: Abstraction has 21912 states and 28120 transitions. [2018-11-07 20:11:04,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:11:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 21912 states and 28120 transitions. [2018-11-07 20:11:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-11-07 20:11:04,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:11:04,790 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:11:04,790 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:11:04,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:04,791 INFO L82 PathProgramCache]: Analyzing trace with hash 407234496, now seen corresponding path program 1 times [2018-11-07 20:11:04,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:11:04,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:04,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:04,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:04,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:11:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:05,502 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 20:11:05,879 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:11:06,158 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-07 20:11:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 193 proven. 175 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:11:06,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:06,785 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:11:06,785 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 328 with the following transitions: [2018-11-07 20:11:06,785 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:11:06,790 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:11:06,790 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:11:07,083 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:11:07,645 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:11:07,645 INFO L272 AbstractInterpreter]: Visited 127 different actions 499 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:11:07,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:07,685 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:11:07,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:07,685 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 20:11:07,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:07,701 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:11:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:07,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:11:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-07 20:11:08,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:11:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-07 20:11:09,127 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:11:09,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [19] total 21 [2018-11-07 20:11:09,128 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:11:09,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:11:09,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:11:09,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:11:09,129 INFO L87 Difference]: Start difference. First operand 21912 states and 28120 transitions. Second operand 3 states. [2018-11-07 20:11:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:11:13,135 INFO L93 Difference]: Finished difference Result 51671 states and 66726 transitions. [2018-11-07 20:11:13,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:11:13,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2018-11-07 20:11:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:11:13,248 INFO L225 Difference]: With dead ends: 51671 [2018-11-07 20:11:13,248 INFO L226 Difference]: Without dead ends: 31450 [2018-11-07 20:11:13,294 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 654 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:11:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31450 states. [2018-11-07 20:11:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31450 to 30017. [2018-11-07 20:11:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30017 states. [2018-11-07 20:11:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30017 states to 30017 states and 38468 transitions. [2018-11-07 20:11:13,867 INFO L78 Accepts]: Start accepts. Automaton has 30017 states and 38468 transitions. Word has length 327 [2018-11-07 20:11:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:11:13,868 INFO L480 AbstractCegarLoop]: Abstraction has 30017 states and 38468 transitions. [2018-11-07 20:11:13,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:11:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 30017 states and 38468 transitions. [2018-11-07 20:11:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-11-07 20:11:13,901 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:11:13,901 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:11:13,902 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:11:13,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash 735034412, now seen corresponding path program 1 times [2018-11-07 20:11:13,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:11:13,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:13,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:13,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:13,904 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:11:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:14,525 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:11:15,088 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 20:11:15,380 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:11:15,848 WARN L179 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-11-07 20:11:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:11:16,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:16,406 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:11:16,406 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 337 with the following transitions: [2018-11-07 20:11:16,406 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [873], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:11:16,411 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:11:16,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:11:16,530 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:11:17,802 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:11:17,802 INFO L272 AbstractInterpreter]: Visited 160 different actions 633 times. Merged at 7 different actions 29 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:11:17,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:17,837 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:11:17,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:17,837 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 20:11:17,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:17,852 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:11:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:17,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:11:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:11:18,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:11:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:11:18,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:11:18,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2018-11-07 20:11:18,718 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:11:18,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:11:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:11:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-11-07 20:11:18,721 INFO L87 Difference]: Start difference. First operand 30017 states and 38468 transitions. Second operand 17 states. [2018-11-07 20:11:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:11:26,561 INFO L93 Difference]: Finished difference Result 59749 states and 80698 transitions. [2018-11-07 20:11:26,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-07 20:11:26,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 336 [2018-11-07 20:11:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:11:26,699 INFO L225 Difference]: With dead ends: 59749 [2018-11-07 20:11:26,699 INFO L226 Difference]: Without dead ends: 30119 [2018-11-07 20:11:26,781 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 681 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=775, Invalid=2305, Unknown=0, NotChecked=0, Total=3080 [2018-11-07 20:11:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30119 states. [2018-11-07 20:11:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30119 to 29507. [2018-11-07 20:11:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29507 states. [2018-11-07 20:11:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29507 states to 29507 states and 37641 transitions. [2018-11-07 20:11:27,764 INFO L78 Accepts]: Start accepts. Automaton has 29507 states and 37641 transitions. Word has length 336 [2018-11-07 20:11:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:11:27,765 INFO L480 AbstractCegarLoop]: Abstraction has 29507 states and 37641 transitions. [2018-11-07 20:11:27,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 20:11:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 29507 states and 37641 transitions. [2018-11-07 20:11:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-11-07 20:11:27,802 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:11:27,803 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:11:27,803 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:11:27,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash -214712118, now seen corresponding path program 1 times [2018-11-07 20:11:27,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:11:27,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:27,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:27,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:27,805 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:11:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 20:11:28,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:28,451 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:11:28,451 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 354 with the following transitions: [2018-11-07 20:11:28,452 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [645], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:11:28,459 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:11:28,464 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:11:28,578 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:11:28,688 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:11:28,688 INFO L272 AbstractInterpreter]: Visited 126 different actions 246 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:11:28,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:28,695 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:11:29,178 INFO L227 lantSequenceWeakener]: Weakened 350 states. On average, predicates are now at 73.46% of their original sizes. [2018-11-07 20:11:29,178 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:11:29,382 INFO L415 sIntCurrentIteration]: We unified 352 AI predicates to 352 [2018-11-07 20:11:29,383 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:11:29,383 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:11:29,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:11:29,383 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:11:29,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:11:29,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:11:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:11:29,384 INFO L87 Difference]: Start difference. First operand 29507 states and 37641 transitions. Second operand 11 states. [2018-11-07 20:11:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:11:42,062 INFO L93 Difference]: Finished difference Result 58822 states and 75091 transitions. [2018-11-07 20:11:42,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:11:42,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 353 [2018-11-07 20:11:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:11:42,162 INFO L225 Difference]: With dead ends: 58822 [2018-11-07 20:11:42,163 INFO L226 Difference]: Without dead ends: 29704 [2018-11-07 20:11:42,208 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 361 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:11:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29704 states. [2018-11-07 20:11:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29704 to 29699. [2018-11-07 20:11:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29699 states. [2018-11-07 20:11:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29699 states to 29699 states and 37853 transitions. [2018-11-07 20:11:43,719 INFO L78 Accepts]: Start accepts. Automaton has 29699 states and 37853 transitions. Word has length 353 [2018-11-07 20:11:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:11:43,720 INFO L480 AbstractCegarLoop]: Abstraction has 29699 states and 37853 transitions. [2018-11-07 20:11:43,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:11:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 29699 states and 37853 transitions. [2018-11-07 20:11:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-07 20:11:43,777 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:11:43,777 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:11:43,777 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:11:43,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1136303486, now seen corresponding path program 1 times [2018-11-07 20:11:43,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:11:43,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:43,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:43,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:43,779 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:11:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 331 proven. 82 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 20:11:44,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:44,209 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:11:44,209 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 364 with the following transitions: [2018-11-07 20:11:44,209 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [645], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:11:44,212 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:11:44,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:11:44,357 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:11:44,791 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:11:44,791 INFO L272 AbstractInterpreter]: Visited 126 different actions 497 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:11:44,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:44,804 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:11:45,310 INFO L227 lantSequenceWeakener]: Weakened 360 states. On average, predicates are now at 75.38% of their original sizes. [2018-11-07 20:11:45,310 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:11:45,417 INFO L415 sIntCurrentIteration]: We unified 362 AI predicates to 362 [2018-11-07 20:11:45,418 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:11:45,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:11:45,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 20:11:45,418 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:11:45,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:11:45,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:11:45,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:11:45,419 INFO L87 Difference]: Start difference. First operand 29699 states and 37853 transitions. Second operand 10 states. [2018-11-07 20:11:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:11:55,390 INFO L93 Difference]: Finished difference Result 61936 states and 79678 transitions. [2018-11-07 20:11:55,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:11:55,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 363 [2018-11-07 20:11:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:11:55,459 INFO L225 Difference]: With dead ends: 61936 [2018-11-07 20:11:55,460 INFO L226 Difference]: Without dead ends: 32818 [2018-11-07 20:11:55,502 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 369 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:11:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32818 states. [2018-11-07 20:11:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32818 to 32776. [2018-11-07 20:11:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32776 states. [2018-11-07 20:11:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32776 states to 32776 states and 41804 transitions. [2018-11-07 20:11:56,022 INFO L78 Accepts]: Start accepts. Automaton has 32776 states and 41804 transitions. Word has length 363 [2018-11-07 20:11:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:11:56,023 INFO L480 AbstractCegarLoop]: Abstraction has 32776 states and 41804 transitions. [2018-11-07 20:11:56,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:11:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32776 states and 41804 transitions. [2018-11-07 20:11:56,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-07 20:11:56,046 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:11:56,046 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:11:56,047 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:11:56,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash -485711466, now seen corresponding path program 1 times [2018-11-07 20:11:56,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:11:56,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:56,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:11:56,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:11:56,049 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:11:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:11:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-07 20:11:56,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:11:56,685 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:11:56,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 364 with the following transitions: [2018-11-07 20:11:56,687 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [645], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:11:56,689 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:11:56,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:11:56,909 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:11:58,378 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:11:58,378 INFO L272 AbstractInterpreter]: Visited 136 different actions 395 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:11:58,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:11:58,405 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:11:58,869 INFO L227 lantSequenceWeakener]: Weakened 360 states. On average, predicates are now at 73.45% of their original sizes. [2018-11-07 20:11:58,869 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:11:58,986 INFO L415 sIntCurrentIteration]: We unified 362 AI predicates to 362 [2018-11-07 20:11:58,986 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:11:58,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:11:58,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 20:11:58,987 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:11:58,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:11:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:11:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:11:58,988 INFO L87 Difference]: Start difference. First operand 32776 states and 41804 transitions. Second operand 11 states. [2018-11-07 20:12:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:12:12,346 INFO L93 Difference]: Finished difference Result 65370 states and 83470 transitions. [2018-11-07 20:12:12,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:12:12,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 363 [2018-11-07 20:12:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:12:12,420 INFO L225 Difference]: With dead ends: 65370 [2018-11-07 20:12:12,420 INFO L226 Difference]: Without dead ends: 33173 [2018-11-07 20:12:12,457 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 372 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:12:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33173 states. [2018-11-07 20:12:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33173 to 33160. [2018-11-07 20:12:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33160 states. [2018-11-07 20:12:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 42263 transitions. [2018-11-07 20:12:12,947 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 42263 transitions. Word has length 363 [2018-11-07 20:12:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:12:12,948 INFO L480 AbstractCegarLoop]: Abstraction has 33160 states and 42263 transitions. [2018-11-07 20:12:12,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:12:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 42263 transitions. [2018-11-07 20:12:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-07 20:12:12,966 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:12:12,966 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2018-11-07 20:12:12,966 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:12:12,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1568936548, now seen corresponding path program 1 times [2018-11-07 20:12:12,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:12:12,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:12,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:12,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:12,968 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:12:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 250 proven. 170 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:12:13,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:12:13,868 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:12:13,868 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 369 with the following transitions: [2018-11-07 20:12:13,868 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:12:13,870 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:12:13,871 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:12:14,011 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:12:15,778 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:12:15,778 INFO L272 AbstractInterpreter]: Visited 127 different actions 627 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:12:15,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:15,788 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:12:15,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:12:15,788 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 20:12:15,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:15,797 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:12:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:15,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:12:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:12:16,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:12:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:12:16,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:12:16,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 21 [2018-11-07 20:12:16,891 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:12:16,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 20:12:16,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 20:12:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:12:16,893 INFO L87 Difference]: Start difference. First operand 33160 states and 42263 transitions. Second operand 19 states. [2018-11-07 20:12:19,682 WARN L179 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-11-07 20:12:24,829 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-11-07 20:12:27,027 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2018-11-07 20:12:27,813 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2018-11-07 20:12:36,396 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-11-07 20:12:37,243 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2018-11-07 20:12:38,460 WARN L179 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-07 20:12:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:12:40,495 INFO L93 Difference]: Finished difference Result 74009 states and 125200 transitions. [2018-11-07 20:12:40,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-07 20:12:40,496 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 368 [2018-11-07 20:12:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:12:40,659 INFO L225 Difference]: With dead ends: 74009 [2018-11-07 20:12:40,659 INFO L226 Difference]: Without dead ends: 33726 [2018-11-07 20:12:40,781 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 792 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3603 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1773, Invalid=8529, Unknown=0, NotChecked=0, Total=10302 [2018-11-07 20:12:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33726 states. [2018-11-07 20:12:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33726 to 27432. [2018-11-07 20:12:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27432 states. [2018-11-07 20:12:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27432 states to 27432 states and 32841 transitions. [2018-11-07 20:12:41,643 INFO L78 Accepts]: Start accepts. Automaton has 27432 states and 32841 transitions. Word has length 368 [2018-11-07 20:12:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:12:41,644 INFO L480 AbstractCegarLoop]: Abstraction has 27432 states and 32841 transitions. [2018-11-07 20:12:41,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 20:12:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 27432 states and 32841 transitions. [2018-11-07 20:12:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2018-11-07 20:12:41,668 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:12:41,669 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:12:41,669 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:12:41,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1394619589, now seen corresponding path program 1 times [2018-11-07 20:12:41,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:12:41,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:41,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:41,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:41,671 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:12:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 154 proven. 206 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-11-07 20:12:42,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:12:42,570 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:12:42,571 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 402 with the following transitions: [2018-11-07 20:12:42,571 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [633], [634], [638], [642], [646], [650], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:12:42,573 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:12:42,574 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:12:42,640 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:12:44,135 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:12:44,135 INFO L272 AbstractInterpreter]: Visited 142 different actions 1266 times. Merged at 8 different actions 80 times. Widened at 1 different actions 4 times. Found 16 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:12:44,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:44,144 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:12:44,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:12:44,144 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 20:12:44,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:44,153 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:12:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:44,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:12:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 20:12:45,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:12:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 250 proven. 102 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 20:12:46,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:12:46,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2018-11-07 20:12:46,190 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:12:46,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 20:12:46,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 20:12:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110 [2018-11-07 20:12:46,191 INFO L87 Difference]: Start difference. First operand 27432 states and 32841 transitions. Second operand 9 states. [2018-11-07 20:12:54,097 WARN L179 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-11-07 20:13:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:12,339 INFO L93 Difference]: Finished difference Result 80251 states and 102924 transitions. [2018-11-07 20:13:12,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-07 20:13:12,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 401 [2018-11-07 20:13:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:12,516 INFO L225 Difference]: With dead ends: 80251 [2018-11-07 20:13:12,516 INFO L226 Difference]: Without dead ends: 53398 [2018-11-07 20:13:12,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 812 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=168, Invalid=431, Unknown=1, NotChecked=0, Total=600 [2018-11-07 20:13:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53398 states. [2018-11-07 20:13:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53398 to 52556. [2018-11-07 20:13:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52556 states. [2018-11-07 20:13:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52556 states to 52556 states and 63966 transitions. [2018-11-07 20:13:13,699 INFO L78 Accepts]: Start accepts. Automaton has 52556 states and 63966 transitions. Word has length 401 [2018-11-07 20:13:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:13,700 INFO L480 AbstractCegarLoop]: Abstraction has 52556 states and 63966 transitions. [2018-11-07 20:13:13,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 20:13:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 52556 states and 63966 transitions. [2018-11-07 20:13:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-11-07 20:13:13,734 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:13,734 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:13:13,734 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:13,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:13,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1275299725, now seen corresponding path program 1 times [2018-11-07 20:13:13,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:13,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:13,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:13,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:13,736 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:14,394 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 20:13:14,689 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:13:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-07 20:13:16,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:16,677 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:16,677 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 407 with the following transitions: [2018-11-07 20:13:16,677 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [653], [654], [658], [662], [665], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:16,679 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:16,680 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:16,739 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:17,094 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:17,094 INFO L272 AbstractInterpreter]: Visited 141 different actions 410 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:13:17,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:17,103 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:17,553 INFO L227 lantSequenceWeakener]: Weakened 403 states. On average, predicates are now at 73.44% of their original sizes. [2018-11-07 20:13:17,553 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:17,695 INFO L415 sIntCurrentIteration]: We unified 405 AI predicates to 405 [2018-11-07 20:13:17,695 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:17,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:17,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2018-11-07 20:13:17,696 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:17,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:13:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:13:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:13:17,697 INFO L87 Difference]: Start difference. First operand 52556 states and 63966 transitions. Second operand 13 states. [2018-11-07 20:13:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:32,083 INFO L93 Difference]: Finished difference Result 94798 states and 115434 transitions. [2018-11-07 20:13:32,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:13:32,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 406 [2018-11-07 20:13:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:32,204 INFO L225 Difference]: With dead ends: 94798 [2018-11-07 20:13:32,204 INFO L226 Difference]: Without dead ends: 52750 [2018-11-07 20:13:32,268 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 415 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:13:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52750 states. [2018-11-07 20:13:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52750 to 52741. [2018-11-07 20:13:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52741 states. [2018-11-07 20:13:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52741 states to 52741 states and 64153 transitions. [2018-11-07 20:13:33,175 INFO L78 Accepts]: Start accepts. Automaton has 52741 states and 64153 transitions. Word has length 406 [2018-11-07 20:13:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:33,175 INFO L480 AbstractCegarLoop]: Abstraction has 52741 states and 64153 transitions. [2018-11-07 20:13:33,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 20:13:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 52741 states and 64153 transitions. [2018-11-07 20:13:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-11-07 20:13:33,209 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:33,210 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:13:33,210 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:33,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 303171955, now seen corresponding path program 1 times [2018-11-07 20:13:33,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:33,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:33,212 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-07 20:13:33,739 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:13:33,743 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:13:33,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:13:33 BoogieIcfgContainer [2018-11-07 20:13:33,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:13:33,745 INFO L168 Benchmark]: Toolchain (without parser) took 209885.12 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-07 20:13:33,746 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:13:33,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 885.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 20:13:33,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 188.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 759.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -875.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:13:33,748 INFO L168 Benchmark]: Boogie Preprocessor took 116.82 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 20:13:33,748 INFO L168 Benchmark]: RCFGBuilder took 4465.46 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 174.0 MB). Peak memory consumption was 174.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:13:33,749 INFO L168 Benchmark]: TraceAbstraction took 204221.36 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -450.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 20:13:33,754 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 885.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 188.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 759.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -875.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.82 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 4465.46 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 174.0 MB). Peak memory consumption was 174.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204221.36 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -450.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 150]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 150). Cancelled while BasicCegarLoop was analyzing trace of length 416 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 204.1s OverallTime, 15 OverallIterations, 4 TraceHistogramMax, 159.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3551 SDtfs, 24812 SDslu, 5186 SDs, 0 SdLazy, 42885 SolverSat, 8822 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 84.4s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 5485 GetRequests, 5127 SyntacticMatches, 12 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6166 ImplicationChecksByTransitivity, 24.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52741occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.1s AbstIntTime, 10 AbstIntIterations, 5 AbstIntStrong, 0.997661923703603 AbsIntWeakeningRatio, 0.09763313609467456 AbsIntAvgWeakeningVarsNumRemoved, 24.464497041420117 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 8.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 10271 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 5680 NumberOfCodeBlocks, 5680 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 7341 ConstructedInterpolants, 54 QuantifiedInterpolants, 12026895 SizeOfPredicates, 8 NumberOfNonLiveVariables, 2844 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 6222/7147 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown