java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label56_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:39:02,072 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:39:02,074 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:39:02,094 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:39:02,094 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:39:02,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:39:02,097 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:39:02,098 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:39:02,100 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:39:02,101 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:39:02,102 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:39:02,102 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:39:02,103 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:39:02,104 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:39:02,105 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:39:02,106 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:39:02,106 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:39:02,108 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:39:02,110 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:39:02,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:39:02,113 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:39:02,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:39:02,117 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 23:39:02,117 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 23:39:02,117 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 23:39:02,118 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 23:39:02,119 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 23:39:02,120 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 23:39:02,126 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 23:39:02,127 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 23:39:02,127 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 23:39:02,130 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 23:39:02,134 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 23:39:02,159 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:39:02,159 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:39:02,160 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:39:02,161 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:39:02,161 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:39:02,161 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:39:02,161 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:39:02,161 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:39:02,162 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:39:02,162 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:39:02,163 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:39:02,163 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:39:02,163 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:39:02,163 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:39:02,164 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:39:02,164 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:39:02,164 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:39:02,164 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:39:02,165 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:39:02,165 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:39:02,165 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:39:02,165 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:39:02,166 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:39:02,166 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:39:02,166 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:39:02,166 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:39:02,166 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:39:02,167 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:39:02,168 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:39:02,168 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:39:02,169 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:39:02,169 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:39:02,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:39:02,169 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:39:02,169 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:39:02,170 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:39:02,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:39:02,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:39:02,234 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:39:02,236 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:39:02,236 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:39:02,237 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label56_false-unreach-call_false-termination.c [2018-10-24 23:39:02,306 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bd1d7d350/2207a005f34b454bab15baaaf46cb1b1/FLAGfed0e7853 [2018-10-24 23:39:02,882 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:39:02,883 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label56_false-unreach-call_false-termination.c [2018-10-24 23:39:02,909 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bd1d7d350/2207a005f34b454bab15baaaf46cb1b1/FLAGfed0e7853 [2018-10-24 23:39:02,930 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bd1d7d350/2207a005f34b454bab15baaaf46cb1b1 [2018-10-24 23:39:02,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:39:02,945 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:39:02,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:39:02,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:39:02,954 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:39:02,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:39:02" (1/1) ... [2018-10-24 23:39:02,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a61b580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:02, skipping insertion in model container [2018-10-24 23:39:02,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:39:02" (1/1) ... [2018-10-24 23:39:02,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:39:03,049 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:39:03,565 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:39:03,571 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:39:03,719 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:39:03,737 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:39:03,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03 WrapperNode [2018-10-24 23:39:03,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:39:03,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:39:03,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:39:03,739 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:39:03,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:03,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:03,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:39:03,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:39:03,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:39:03,933 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:39:03,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:03,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:03,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:03,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:04,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:04,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:04,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... [2018-10-24 23:39:04,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:39:04,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:39:04,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:39:04,072 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:39:04,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:39:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:39:04,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:39:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:39:04,141 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:39:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:39:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:39:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:39:04,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:39:07,910 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:39:07,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:39:07 BoogieIcfgContainer [2018-10-24 23:39:07,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:39:07,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:39:07,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:39:07,916 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:39:07,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:39:02" (1/3) ... [2018-10-24 23:39:07,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ead59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:39:07, skipping insertion in model container [2018-10-24 23:39:07,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:39:03" (2/3) ... [2018-10-24 23:39:07,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ead59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:39:07, skipping insertion in model container [2018-10-24 23:39:07,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:39:07" (3/3) ... [2018-10-24 23:39:07,920 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label56_false-unreach-call_false-termination.c [2018-10-24 23:39:07,930 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:39:07,939 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:39:07,956 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:39:07,994 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:39:07,994 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:39:07,994 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:39:07,995 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:39:07,995 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:39:07,995 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:39:07,995 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:39:07,996 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:39:08,021 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-24 23:39:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 23:39:08,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:39:08,029 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] [2018-10-24 23:39:08,031 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:39:08,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1546404148, now seen corresponding path program 1 times [2018-10-24 23:39:08,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:39:08,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:08,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:39:08,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:08,084 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:39:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:39:08,437 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:39:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:39:08,455 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:39:08,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 23:39:08,457 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:39:08,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:39:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:39:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:39:08,479 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-24 23:39:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:39:10,559 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-24 23:39:10,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:39:10,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-10-24 23:39:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:39:10,586 INFO L225 Difference]: With dead ends: 691 [2018-10-24 23:39:10,586 INFO L226 Difference]: Without dead ends: 434 [2018-10-24 23:39:10,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:39:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-24 23:39:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-24 23:39:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-24 23:39:10,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-10-24 23:39:10,692 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 24 [2018-10-24 23:39:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:39:10,693 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-10-24 23:39:10,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:39:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-10-24 23:39:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-24 23:39:10,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:39:10,700 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:39:10,700 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:39:10,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -412678633, now seen corresponding path program 1 times [2018-10-24 23:39:10,701 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:39:10,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:10,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:39:10,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:10,703 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:39:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:39:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:39:11,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:39:11,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:39:11,053 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:39:11,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:39:11,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:39:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:39:11,057 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-10-24 23:39:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:39:13,144 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-10-24 23:39:13,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:39:13,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2018-10-24 23:39:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:39:13,151 INFO L225 Difference]: With dead ends: 1062 [2018-10-24 23:39:13,151 INFO L226 Difference]: Without dead ends: 634 [2018-10-24 23:39:13,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:39:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-10-24 23:39:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-10-24 23:39:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-10-24 23:39:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-10-24 23:39:13,195 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 111 [2018-10-24 23:39:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:39:13,196 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-10-24 23:39:13,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:39:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-10-24 23:39:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-24 23:39:13,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:39:13,201 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:39:13,201 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:39:13,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1086282972, now seen corresponding path program 1 times [2018-10-24 23:39:13,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:39:13,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:13,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:39:13,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:13,203 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:39:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:39:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:39:13,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:39:13,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:39:13,375 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:39:13,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:39:13,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:39:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:39:13,377 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-10-24 23:39:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:39:18,020 INFO L93 Difference]: Finished difference Result 2167 states and 3655 transitions. [2018-10-24 23:39:18,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 23:39:18,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2018-10-24 23:39:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:39:18,033 INFO L225 Difference]: With dead ends: 2167 [2018-10-24 23:39:18,033 INFO L226 Difference]: Without dead ends: 1172 [2018-10-24 23:39:18,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 23:39:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2018-10-24 23:39:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2018-10-24 23:39:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2018-10-24 23:39:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1890 transitions. [2018-10-24 23:39:18,095 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1890 transitions. Word has length 120 [2018-10-24 23:39:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:39:18,095 INFO L481 AbstractCegarLoop]: Abstraction has 1172 states and 1890 transitions. [2018-10-24 23:39:18,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:39:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1890 transitions. [2018-10-24 23:39:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-24 23:39:18,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:39:18,114 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:39:18,114 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:39:18,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1482099072, now seen corresponding path program 1 times [2018-10-24 23:39:18,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:39:18,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:18,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:39:18,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:18,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:39:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:39:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:39:18,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:39:18,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:39:18,422 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:39:18,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:39:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:39:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:39:18,425 INFO L87 Difference]: Start difference. First operand 1172 states and 1890 transitions. Second operand 4 states. [2018-10-24 23:39:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:39:20,525 INFO L93 Difference]: Finished difference Result 4363 states and 7273 transitions. [2018-10-24 23:39:20,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:39:20,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 224 [2018-10-24 23:39:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:39:20,558 INFO L225 Difference]: With dead ends: 4363 [2018-10-24 23:39:20,558 INFO L226 Difference]: Without dead ends: 3197 [2018-10-24 23:39:20,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:39:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2018-10-24 23:39:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2018-10-24 23:39:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2018-10-24 23:39:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4831 transitions. [2018-10-24 23:39:20,677 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4831 transitions. Word has length 224 [2018-10-24 23:39:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:39:20,678 INFO L481 AbstractCegarLoop]: Abstraction has 3197 states and 4831 transitions. [2018-10-24 23:39:20,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:39:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4831 transitions. [2018-10-24 23:39:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-24 23:39:20,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:39:20,688 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:39:20,689 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:39:20,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash 938793631, now seen corresponding path program 1 times [2018-10-24 23:39:20,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:39:20,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:20,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:39:20,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:20,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:39:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:39:21,054 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-24 23:39:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 34 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 23:39:21,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:39:21,254 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:39:21,255 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2018-10-24 23:39:21,257 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [93], [95], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 23:39:21,306 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:39:21,306 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:39:25,316 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 23:39:25,318 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-24 23:39:25,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:25,327 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 23:39:29,396 INFO L232 lantSequenceWeakener]: Weakened 234 states. On average, predicates are now at 77.42% of their original sizes. [2018-10-24 23:39:29,397 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 23:39:29,550 INFO L413 sIntCurrentIteration]: We have 242 unified AI predicates [2018-10-24 23:39:29,550 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 23:39:29,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:39:29,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2018-10-24 23:39:29,552 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:39:29,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:39:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:39:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:39:29,553 INFO L87 Difference]: Start difference. First operand 3197 states and 4831 transitions. Second operand 6 states. [2018-10-24 23:39:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:39:57,201 INFO L93 Difference]: Finished difference Result 6573 states and 9934 transitions. [2018-10-24 23:39:57,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 23:39:57,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 243 [2018-10-24 23:39:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:39:57,221 INFO L225 Difference]: With dead ends: 6573 [2018-10-24 23:39:57,221 INFO L226 Difference]: Without dead ends: 3382 [2018-10-24 23:39:57,239 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 23:39:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2018-10-24 23:39:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 3380. [2018-10-24 23:39:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3380 states. [2018-10-24 23:39:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5022 transitions. [2018-10-24 23:39:57,330 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5022 transitions. Word has length 243 [2018-10-24 23:39:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:39:57,331 INFO L481 AbstractCegarLoop]: Abstraction has 3380 states and 5022 transitions. [2018-10-24 23:39:57,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:39:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5022 transitions. [2018-10-24 23:39:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-24 23:39:57,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:39:57,343 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 23:39:57,343 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:39:57,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:39:57,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1617683216, now seen corresponding path program 1 times [2018-10-24 23:39:57,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:39:57,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:57,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:39:57,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:39:57,345 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:39:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:39:57,958 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 23:39:58,158 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 23:39:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 139 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 23:39:58,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:39:58,890 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:39:58,890 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2018-10-24 23:39:58,891 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [93], [95], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 23:39:58,896 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:39:58,896 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:40:03,051 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 23:40:03,051 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-24 23:40:03,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:40:03,060 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 23:40:07,924 INFO L232 lantSequenceWeakener]: Weakened 221 states. On average, predicates are now at 77.5% of their original sizes. [2018-10-24 23:40:07,924 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 23:40:08,390 INFO L413 sIntCurrentIteration]: We have 327 unified AI predicates [2018-10-24 23:40:08,390 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 23:40:08,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:40:08,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [12] total 25 [2018-10-24 23:40:08,391 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:40:08,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 23:40:08,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 23:40:08,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-24 23:40:08,393 INFO L87 Difference]: Start difference. First operand 3380 states and 5022 transitions. Second operand 15 states. [2018-10-24 23:41:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:41:33,900 INFO L93 Difference]: Finished difference Result 7297 states and 10838 transitions. [2018-10-24 23:41:33,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 23:41:33,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 328 [2018-10-24 23:41:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:41:33,922 INFO L225 Difference]: With dead ends: 7297 [2018-10-24 23:41:33,922 INFO L226 Difference]: Without dead ends: 4106 [2018-10-24 23:41:33,941 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 334 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2018-10-24 23:41:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2018-10-24 23:41:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4099. [2018-10-24 23:41:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4099 states. [2018-10-24 23:41:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5831 transitions. [2018-10-24 23:41:34,042 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5831 transitions. Word has length 328 [2018-10-24 23:41:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:41:34,043 INFO L481 AbstractCegarLoop]: Abstraction has 4099 states and 5831 transitions. [2018-10-24 23:41:34,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 23:41:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5831 transitions. [2018-10-24 23:41:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-10-24 23:41:34,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:41:34,058 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 23:41:34,059 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:41:34,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:41:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1801558220, now seen corresponding path program 1 times [2018-10-24 23:41:34,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:41:34,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:41:34,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:41:34,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:41:34,061 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:41:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:41:34,549 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 23:41:34,740 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 23:41:34,970 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 23:41:35,493 WARN L179 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-24 23:41:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 150 proven. 300 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-24 23:41:35,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:41:35,984 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:41:35,984 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 403 with the following transitions: [2018-10-24 23:41:35,984 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [93], [95], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [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], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 23:41:35,988 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:41:35,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:41:43,718 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:41:43,718 INFO L272 AbstractInterpreter]: Visited 124 different actions 371 times. Merged at 9 different actions 23 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-24 23:41:43,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:41:43,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:41:43,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:41:43,729 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:41:43,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:41:43,740 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:41:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:41:43,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:41:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 382 proven. 42 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-10-24 23:41:45,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:41:46,168 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-24 23:41:46,412 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 23:41:46,539 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 23:41:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 83 proven. 367 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-24 23:41:47,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:41:47,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 24 [2018-10-24 23:41:47,153 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:41:47,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 23:41:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 23:41:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2018-10-24 23:41:47,155 INFO L87 Difference]: Start difference. First operand 4099 states and 5831 transitions. Second operand 19 states. [2018-10-24 23:41:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:41:57,618 INFO L93 Difference]: Finished difference Result 11419 states and 16670 transitions. [2018-10-24 23:41:57,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 23:41:57,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 402 [2018-10-24 23:41:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:41:57,651 INFO L225 Difference]: With dead ends: 11419 [2018-10-24 23:41:57,651 INFO L226 Difference]: Without dead ends: 6936 [2018-10-24 23:41:57,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 23:41:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2018-10-24 23:41:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6578. [2018-10-24 23:41:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6578 states. [2018-10-24 23:41:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 8556 transitions. [2018-10-24 23:41:57,841 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 8556 transitions. Word has length 402 [2018-10-24 23:41:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:41:57,842 INFO L481 AbstractCegarLoop]: Abstraction has 6578 states and 8556 transitions. [2018-10-24 23:41:57,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 23:41:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 8556 transitions. [2018-10-24 23:41:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-10-24 23:41:57,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:41:57,863 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:41:57,863 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:41:57,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:41:57,863 INFO L82 PathProgramCache]: Analyzing trace with hash 406172240, now seen corresponding path program 1 times [2018-10-24 23:41:57,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:41:57,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:41:57,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:41:57,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:41:57,865 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:41:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:41:58,687 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 23:41:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 300 proven. 105 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2018-10-24 23:41:59,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:41:59,193 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:41:59,194 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 465 with the following transitions: [2018-10-24 23:41:59,194 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [93], [95], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-24 23:41:59,208 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:41:59,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:42:25,539 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 23:42:25,539 INFO L272 AbstractInterpreter]: Visited 123 different actions 367 times. Merged at 7 different actions 20 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-24 23:42:25,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:42:25,551 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 23:42:41,646 INFO L232 lantSequenceWeakener]: Weakened 225 states. On average, predicates are now at 77.63% of their original sizes. [2018-10-24 23:42:41,647 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 23:42:42,239 INFO L413 sIntCurrentIteration]: We have 463 unified AI predicates [2018-10-24 23:42:42,240 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 23:42:42,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:42:42,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2018-10-24 23:42:42,240 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:42:42,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 23:42:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 23:42:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-24 23:42:42,242 INFO L87 Difference]: Start difference. First operand 6578 states and 8556 transitions. Second operand 15 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown