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_label27_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:27:51,247 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:27:51,252 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:27:51,271 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:27:51,272 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:27:51,273 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:27:51,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:27:51,276 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:27:51,278 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:27:51,279 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:27:51,280 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:27:51,282 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:27:51,283 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:27:51,284 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:27:51,287 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:27:51,288 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:27:51,289 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:27:51,290 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:27:51,292 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:27:51,294 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:27:51,294 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:27:51,297 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:27:51,299 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:27:51,299 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:27:51,302 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:27:51,303 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:27:51,303 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:27:51,307 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:27:51,308 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:27:51,309 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:27:51,310 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:27:51,311 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 05:27:51,311 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 05:27:51,312 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 05:27:51,314 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 05:27:51,314 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 05:27:51,315 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 [2018-10-27 05:27:51,345 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:27:51,345 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:27:51,349 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:27:51,349 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:27:51,350 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:27:51,350 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:27:51,350 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 05:27:51,350 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:27:51,350 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 05:27:51,351 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:27:51,351 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 05:27:51,351 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:27:51,351 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:27:51,351 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:27:51,352 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:27:51,352 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:27:51,353 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:27:51,353 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:27:51,353 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:27:51,353 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:27:51,353 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:27:51,354 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:27:51,354 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:27:51,354 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:27:51,354 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:27:51,354 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:27:51,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:27:51,355 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:27:51,355 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:27:51,355 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:27:51,355 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:27:51,356 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:27:51,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:27:51,356 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:27:51,356 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 05:27:51,356 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 05:27:51,400 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:27:51,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:27:51,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:27:51,419 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:27:51,420 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:27:51,420 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label27_false-unreach-call_false-termination.c [2018-10-27 05:27:51,484 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b575c21a0/6d3982a04bbb4deca0b6ba3e75fcff7c/FLAG2a46d6e66 [2018-10-27 05:27:52,096 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:27:52,101 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label27_false-unreach-call_false-termination.c [2018-10-27 05:27:52,127 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b575c21a0/6d3982a04bbb4deca0b6ba3e75fcff7c/FLAG2a46d6e66 [2018-10-27 05:27:52,147 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b575c21a0/6d3982a04bbb4deca0b6ba3e75fcff7c [2018-10-27 05:27:52,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:27:52,161 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 05:27:52,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:27:52,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:27:52,166 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:27:52,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:27:52" (1/1) ... [2018-10-27 05:27:52,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3e367d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:52, skipping insertion in model container [2018-10-27 05:27:52,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:27:52" (1/1) ... [2018-10-27 05:27:52,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:27:52,249 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:27:52,826 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:27:52,831 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:27:52,995 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:27:53,012 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:27:53,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53 WrapperNode [2018-10-27 05:27:53,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:27:53,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:27:53,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:27:53,014 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:27:53,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:27:53,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:27:53,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:27:53,244 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:27:53,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (1/1) ... [2018-10-27 05:27:53,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:27:53,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:27:53,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:27:53,347 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:27:53,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (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 [2018-10-27 05:27:53,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:27:53,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:27:53,425 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 05:27:53,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 05:27:53,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:27:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:27:53,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:27:53,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:27:57,170 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:27:57,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:27:57 BoogieIcfgContainer [2018-10-27 05:27:57,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:27:57,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:27:57,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:27:57,175 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:27:57,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:27:52" (1/3) ... [2018-10-27 05:27:57,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5845fc6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:27:57, skipping insertion in model container [2018-10-27 05:27:57,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:27:53" (2/3) ... [2018-10-27 05:27:57,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5845fc6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:27:57, skipping insertion in model container [2018-10-27 05:27:57,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:27:57" (3/3) ... [2018-10-27 05:27:57,179 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label27_false-unreach-call_false-termination.c [2018-10-27 05:27:57,190 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:27:57,200 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 05:27:57,218 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 05:27:57,258 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:27:57,259 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:27:57,259 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:27:57,259 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:27:57,259 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:27:57,260 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:27:57,260 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:27:57,260 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:27:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-27 05:27:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 05:27:57,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:27:57,298 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] [2018-10-27 05:27:57,301 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:27:57,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:27:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1858736316, now seen corresponding path program 1 times [2018-10-27 05:27:57,310 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:27:57,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:27:57,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:27:57,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:27:57,363 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:27:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:27:57,728 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 05:27:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:27:57,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:27:57,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:27:57,857 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:27:57,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 05:27:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 05:27:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:27:57,891 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-27 05:27:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:27:59,977 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-27 05:27:59,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 05:27:59,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2018-10-27 05:27:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:00,002 INFO L225 Difference]: With dead ends: 691 [2018-10-27 05:28:00,003 INFO L226 Difference]: Without dead ends: 434 [2018-10-27 05:28:00,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 05:28:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-27 05:28:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-27 05:28:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-27 05:28:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 755 transitions. [2018-10-27 05:28:00,090 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 755 transitions. Word has length 36 [2018-10-27 05:28:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:00,090 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 755 transitions. [2018-10-27 05:28:00,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 05:28:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 755 transitions. [2018-10-27 05:28:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-27 05:28:00,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:00,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:28:00,099 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:00,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1801704236, now seen corresponding path program 1 times [2018-10-27 05:28:00,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:00,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:00,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:00,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:00,101 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:28:00,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:28:00,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 05:28:00,457 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:00,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:28:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:28:00,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:28:00,460 INFO L87 Difference]: Start difference. First operand 434 states and 755 transitions. Second operand 6 states. [2018-10-27 05:28:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:28:03,088 INFO L93 Difference]: Finished difference Result 1254 states and 2256 transitions. [2018-10-27 05:28:03,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 05:28:03,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-10-27 05:28:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:03,099 INFO L225 Difference]: With dead ends: 1254 [2018-10-27 05:28:03,100 INFO L226 Difference]: Without dead ends: 826 [2018-10-27 05:28:03,103 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 [2018-10-27 05:28:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2018-10-27 05:28:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 812. [2018-10-27 05:28:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-10-27 05:28:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1377 transitions. [2018-10-27 05:28:03,164 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1377 transitions. Word has length 116 [2018-10-27 05:28:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:03,165 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1377 transitions. [2018-10-27 05:28:03,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:28:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1377 transitions. [2018-10-27 05:28:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-27 05:28:03,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:03,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:28:03,177 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:03,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -881737549, now seen corresponding path program 1 times [2018-10-27 05:28:03,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:03,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:03,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:03,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:03,181 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:28:03,455 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:28:03,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:28:03,456 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:03,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:28:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:28:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:28:03,457 INFO L87 Difference]: Start difference. First operand 812 states and 1377 transitions. Second operand 4 states. [2018-10-27 05:28:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:28:07,082 INFO L93 Difference]: Finished difference Result 1988 states and 3385 transitions. [2018-10-27 05:28:07,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 05:28:07,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2018-10-27 05:28:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:07,107 INFO L225 Difference]: With dead ends: 1988 [2018-10-27 05:28:07,108 INFO L226 Difference]: Without dead ends: 1182 [2018-10-27 05:28:07,114 INFO L605 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 [2018-10-27 05:28:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-10-27 05:28:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2018-10-27 05:28:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2018-10-27 05:28:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1748 transitions. [2018-10-27 05:28:07,173 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1748 transitions. Word has length 149 [2018-10-27 05:28:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:07,173 INFO L481 AbstractCegarLoop]: Abstraction has 1182 states and 1748 transitions. [2018-10-27 05:28:07,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:28:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1748 transitions. [2018-10-27 05:28:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-27 05:28:07,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:07,188 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 05:28:07,188 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:07,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:07,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1137796060, now seen corresponding path program 1 times [2018-10-27 05:28:07,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:07,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:07,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:07,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:07,190 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:07,745 WARN L179 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-10-27 05:28:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 05:28:08,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:28:08,114 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:28:08,115 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 231 with the following transitions: [2018-10-27 05:28:08,117 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], [189], [191], [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], [538], [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], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:28:08,168 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:28:08,168 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:28:11,934 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:28:11,936 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 05:28:11,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:11,946 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:28:15,489 INFO L227 lantSequenceWeakener]: Weakened 221 states. On average, predicates are now at 77.68% of their original sizes. [2018-10-27 05:28:15,489 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:28:15,757 INFO L415 sIntCurrentIteration]: We unified 229 AI predicates to 229 [2018-10-27 05:28:15,757 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:28:15,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:28:15,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2018-10-27 05:28:15,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:15,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 05:28:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 05:28:15,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:28:15,760 INFO L87 Difference]: Start difference. First operand 1182 states and 1748 transitions. Second operand 6 states. [2018-10-27 05:28:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:28:29,896 INFO L93 Difference]: Finished difference Result 2543 states and 3768 transitions. [2018-10-27 05:28:29,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:28:29,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2018-10-27 05:28:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:28:29,906 INFO L225 Difference]: With dead ends: 2543 [2018-10-27 05:28:29,906 INFO L226 Difference]: Without dead ends: 1367 [2018-10-27 05:28:29,910 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 05:28:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2018-10-27 05:28:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1365. [2018-10-27 05:28:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2018-10-27 05:28:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1938 transitions. [2018-10-27 05:28:29,954 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1938 transitions. Word has length 230 [2018-10-27 05:28:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:28:29,955 INFO L481 AbstractCegarLoop]: Abstraction has 1365 states and 1938 transitions. [2018-10-27 05:28:29,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 05:28:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1938 transitions. [2018-10-27 05:28:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-27 05:28:29,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:28:29,962 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:28:29,963 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:28:29,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:29,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2002790539, now seen corresponding path program 1 times [2018-10-27 05:28:29,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:28:29,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:29,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:28:29,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:28:29,965 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:28:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:28:30,533 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:28:30,741 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-27 05:28:30,967 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:28:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 175 proven. 154 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 05:28:31,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:28:31,638 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:28:31,638 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 316 with the following transitions: [2018-10-27 05:28:31,639 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], [189], [191], [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], [538], [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], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:28:31,645 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:28:31,645 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:28:35,682 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:28:35,682 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. [2018-10-27 05:28:35,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:28:35,690 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:28:37,770 INFO L227 lantSequenceWeakener]: Weakened 312 states. On average, predicates are now at 77.64% of their original sizes. [2018-10-27 05:28:37,770 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:28:38,203 INFO L415 sIntCurrentIteration]: We unified 314 AI predicates to 314 [2018-10-27 05:28:38,203 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:28:38,203 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:28:38,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-10-27 05:28:38,204 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:28:38,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:28:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:28:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:28:38,205 INFO L87 Difference]: Start difference. First operand 1365 states and 1938 transitions. Second operand 10 states. [2018-10-27 05:29:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:29:50,069 INFO L93 Difference]: Finished difference Result 3104 states and 4527 transitions. [2018-10-27 05:29:50,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 05:29:50,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 315 [2018-10-27 05:29:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:29:50,080 INFO L225 Difference]: With dead ends: 3104 [2018-10-27 05:29:50,080 INFO L226 Difference]: Without dead ends: 1928 [2018-10-27 05:29:50,085 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 323 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:29:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2018-10-27 05:29:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1925. [2018-10-27 05:29:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2018-10-27 05:29:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2546 transitions. [2018-10-27 05:29:50,137 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2546 transitions. Word has length 315 [2018-10-27 05:29:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:29:50,138 INFO L481 AbstractCegarLoop]: Abstraction has 1925 states and 2546 transitions. [2018-10-27 05:29:50,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:29:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2546 transitions. [2018-10-27 05:29:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-10-27 05:29:50,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:29:50,150 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:29:50,150 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:29:50,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:29:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1319860115, now seen corresponding path program 1 times [2018-10-27 05:29:50,151 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:29:50,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:29:50,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:29:50,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:29:50,152 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:29:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:29:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 314 proven. 218 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-27 05:29:51,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:29:51,845 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:29:51,845 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 416 with the following transitions: [2018-10-27 05:29:51,846 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], [189], [191], [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], [538], [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], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:29:51,851 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:29:51,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:29:55,649 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:29:55,650 INFO L272 AbstractInterpreter]: Visited 123 different actions 240 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-27 05:29:55,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:29:55,659 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:29:57,888 INFO L227 lantSequenceWeakener]: Weakened 412 states. On average, predicates are now at 77.59% of their original sizes. [2018-10-27 05:29:57,888 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:29:58,633 INFO L415 sIntCurrentIteration]: We unified 414 AI predicates to 414 [2018-10-27 05:29:58,633 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:29:58,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:29:58,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2018-10-27 05:29:58,634 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:29:58,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 05:29:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 05:29:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:29:58,635 INFO L87 Difference]: Start difference. First operand 1925 states and 2546 transitions. Second operand 10 states. [2018-10-27 05:30:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:30:20,902 INFO L93 Difference]: Finished difference Result 3849 states and 5116 transitions. [2018-10-27 05:30:20,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 05:30:20,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 415 [2018-10-27 05:30:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:30:20,912 INFO L225 Difference]: With dead ends: 3849 [2018-10-27 05:30:20,912 INFO L226 Difference]: Without dead ends: 2113 [2018-10-27 05:30:20,918 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 422 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-10-27 05:30:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2018-10-27 05:30:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2110. [2018-10-27 05:30:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2110 states. [2018-10-27 05:30:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2745 transitions. [2018-10-27 05:30:20,969 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2745 transitions. Word has length 415 [2018-10-27 05:30:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:30:20,970 INFO L481 AbstractCegarLoop]: Abstraction has 2110 states and 2745 transitions. [2018-10-27 05:30:20,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 05:30:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2745 transitions. [2018-10-27 05:30:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2018-10-27 05:30:20,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:30:20,982 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:30:20,983 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:30:20,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 164788363, now seen corresponding path program 1 times [2018-10-27 05:30:20,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:30:20,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:20,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:20,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:20,985 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:30:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:21,849 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-27 05:30:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 348 proven. 80 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-10-27 05:30:22,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:22,360 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:30:22,361 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 452 with the following transitions: [2018-10-27 05:30:22,361 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], [189], [191], [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], [538], [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], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:30:22,366 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:30:22,367 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:30:30,958 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:30:30,958 INFO L272 AbstractInterpreter]: Visited 123 different actions 368 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 05:30:30,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:30,969 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:30:32,258 INFO L227 lantSequenceWeakener]: Weakened 448 states. On average, predicates are now at 80.24% of their original sizes. [2018-10-27 05:30:32,258 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:30:32,328 INFO L415 sIntCurrentIteration]: We unified 450 AI predicates to 450 [2018-10-27 05:30:32,329 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:30:32,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:30:32,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-10-27 05:30:32,329 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:30:32,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:30:32,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:30:32,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-27 05:30:32,331 INFO L87 Difference]: Start difference. First operand 2110 states and 2745 transitions. Second operand 9 states. [2018-10-27 05:30:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:30:48,313 INFO L93 Difference]: Finished difference Result 4375 states and 5938 transitions. [2018-10-27 05:30:48,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 05:30:48,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 451 [2018-10-27 05:30:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:30:48,325 INFO L225 Difference]: With dead ends: 4375 [2018-10-27 05:30:48,326 INFO L226 Difference]: Without dead ends: 2639 [2018-10-27 05:30:48,333 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 457 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-10-27 05:30:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2018-10-27 05:30:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2620. [2018-10-27 05:30:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2620 states. [2018-10-27 05:30:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 3423 transitions. [2018-10-27 05:30:48,393 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 3423 transitions. Word has length 451 [2018-10-27 05:30:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:30:48,394 INFO L481 AbstractCegarLoop]: Abstraction has 2620 states and 3423 transitions. [2018-10-27 05:30:48,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:30:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 3423 transitions. [2018-10-27 05:30:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2018-10-27 05:30:48,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:30:48,410 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-27 05:30:48,410 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:30:48,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash 797962692, now seen corresponding path program 1 times [2018-10-27 05:30:48,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:30:48,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:48,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:48,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:30:48,412 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:30:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 243 proven. 259 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2018-10-27 05:30:48,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:48,929 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:30:48,929 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 501 with the following transitions: [2018-10-27 05:30:48,929 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], [189], [191], [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], [538], [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], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:30:48,933 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:30:48,933 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:30:55,305 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:30:55,306 INFO L272 AbstractInterpreter]: Visited 125 different actions 505 times. Merged at 9 different actions 41 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 05:30:55,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:30:55,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:30:55,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:30:55,314 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 [2018-10-27 05:30:55,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:30:55,325 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:30:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:30:55,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:30:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 644 proven. 2 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-10-27 05:30:55,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:30:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 243 proven. 259 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2018-10-27 05:30:56,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:30:56,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 05:30:56,912 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:30:56,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 05:30:56,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 05:30:56,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 05:30:56,915 INFO L87 Difference]: Start difference. First operand 2620 states and 3423 transitions. Second operand 9 states. [2018-10-27 05:30:57,599 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 05:31:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:31:03,714 INFO L93 Difference]: Finished difference Result 6558 states and 9160 transitions. [2018-10-27 05:31:03,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-27 05:31:03,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 500 [2018-10-27 05:31:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:31:03,744 INFO L225 Difference]: With dead ends: 6558 [2018-10-27 05:31:03,744 INFO L226 Difference]: Without dead ends: 3943 [2018-10-27 05:31:03,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1017 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:31:03,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2018-10-27 05:31:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3915. [2018-10-27 05:31:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3915 states. [2018-10-27 05:31:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 4888 transitions. [2018-10-27 05:31:03,857 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 4888 transitions. Word has length 500 [2018-10-27 05:31:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:31:03,858 INFO L481 AbstractCegarLoop]: Abstraction has 3915 states and 4888 transitions. [2018-10-27 05:31:03,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 05:31:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 4888 transitions. [2018-10-27 05:31:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2018-10-27 05:31:03,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:03,869 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:31:03,869 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:03,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1295715964, now seen corresponding path program 1 times [2018-10-27 05:31:03,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:03,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:03,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:03,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:03,871 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:05,206 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-27 05:31:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 350 proven. 261 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-27 05:31:05,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:05,941 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:31:05,942 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 519 with the following transitions: [2018-10-27 05:31:05,942 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], [189], [191], [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], [538], [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], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:31:05,949 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:31:05,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:31:12,995 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:31:12,995 INFO L272 AbstractInterpreter]: Visited 191 different actions 763 times. Merged at 9 different actions 35 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 24 variables. [2018-10-27 05:31:13,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:13,004 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:31:13,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:13,004 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 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 [2018-10-27 05:31:13,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:13,012 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:31:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:13,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:31:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 551 proven. 2 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2018-10-27 05:31:13,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:31:14,164 WARN L179 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2018-10-27 05:31:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 348 proven. 80 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-10-27 05:31:15,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:31:15,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-10-27 05:31:15,014 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:31:15,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 05:31:15,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 05:31:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-10-27 05:31:15,016 INFO L87 Difference]: Start difference. First operand 3915 states and 4888 transitions. Second operand 17 states. [2018-10-27 05:31:17,607 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2018-10-27 05:31:18,513 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-10-27 05:31:18,874 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-10-27 05:31:21,007 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-10-27 05:31:23,651 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-10-27 05:31:26,616 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2018-10-27 05:31:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:31:27,981 INFO L93 Difference]: Finished difference Result 8778 states and 11475 transitions. [2018-10-27 05:31:27,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-27 05:31:27,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 518 [2018-10-27 05:31:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:31:28,007 INFO L225 Difference]: With dead ends: 8778 [2018-10-27 05:31:28,007 INFO L226 Difference]: Without dead ends: 4543 [2018-10-27 05:31:28,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=875, Invalid=3285, Unknown=0, NotChecked=0, Total=4160 [2018-10-27 05:31:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2018-10-27 05:31:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4435. [2018-10-27 05:31:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4435 states. [2018-10-27 05:31:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 5392 transitions. [2018-10-27 05:31:28,146 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 5392 transitions. Word has length 518 [2018-10-27 05:31:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:31:28,147 INFO L481 AbstractCegarLoop]: Abstraction has 4435 states and 5392 transitions. [2018-10-27 05:31:28,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 05:31:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 5392 transitions. [2018-10-27 05:31:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-10-27 05:31:28,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:31:28,158 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:31:28,159 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 05:31:28,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1213538324, now seen corresponding path program 1 times [2018-10-27 05:31:28,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:31:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:28,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:31:28,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:31:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 464 proven. 397 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-27 05:31:29,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:29,219 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:31:29,219 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 525 with the following transitions: [2018-10-27 05:31:29,219 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], [189], [191], [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], [506], [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], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-27 05:31:29,222 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 05:31:29,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:31:39,344 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 05:31:39,344 INFO L272 AbstractInterpreter]: Visited 125 different actions 496 times. Merged at 9 different actions 32 times. Never widened. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-10-27 05:31:39,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:31:39,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 05:31:39,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:31:39,351 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 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 [2018-10-27 05:31:39,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:31:39,362 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 05:31:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:31:39,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:31:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-10-27 05:31:39,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:31:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 458 proven. 80 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2018-10-27 05:31:40,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:31:40,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-10-27 05:31:40,575 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:31:40,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 05:31:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 05:31:40,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:31:40,577 INFO L87 Difference]: Start difference. First operand 4435 states and 5392 transitions. Second operand 17 states. Received shutdown request... [2018-10-27 05:31:46,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-27 05:31:46,235 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 05:31:46,240 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 05:31:46,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:31:46 BoogieIcfgContainer [2018-10-27 05:31:46,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:31:46,242 INFO L168 Benchmark]: Toolchain (without parser) took 234081.69 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-27 05:31:46,243 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 05:31:46,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 850.95 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:46,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 229.59 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 709.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:46,246 INFO L168 Benchmark]: Boogie Preprocessor took 103.09 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:46,247 INFO L168 Benchmark]: RCFGBuilder took 3823.75 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 120.0 MB). Peak memory consumption was 120.0 MB. Max. memory is 7.1 GB. [2018-10-27 05:31:46,248 INFO L168 Benchmark]: TraceAbstraction took 229069.15 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.8 GB in the end (delta: -759.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-27 05:31:46,252 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 850.95 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 229.59 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 709.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.6 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.09 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3823.75 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 120.0 MB). Peak memory consumption was 120.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229069.15 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 2.8 GB in the end (delta: -759.4 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 91). Cancelled while BasicCegarLoop was constructing difference of abstraction (4435states) and FLOYD_HOARE automaton (currently 25 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 39 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 228.9s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 158.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1528 SDtfs, 15963 SDslu, 2411 SDs, 0 SdLazy, 23454 SolverSat, 4184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 122.3s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4728 GetRequests, 4528 SyntacticMatches, 7 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 11.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4435occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 43.8s AbstIntTime, 7 AbstIntIterations, 4 AbstIntStrong, 0.9970194725741129 AbsIntWeakeningRatio, 0.09523809523809523 AbsIntAvgWeakeningVarsNumRemoved, 16.041222459132907 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 177 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 4796 NumberOfCodeBlocks, 4796 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 6322 ConstructedInterpolants, 0 QuantifiedInterpolants, 16507299 SizeOfPredicates, 13 NumberOfNonLiveVariables, 2395 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 7960/9830 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown