java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 08:58:20,252 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 08:58:20,254 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 08:58:20,267 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 08:58:20,267 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 08:58:20,268 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 08:58:20,269 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 08:58:20,271 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 08:58:20,273 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 08:58:20,274 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 08:58:20,275 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 08:58:20,275 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 08:58:20,276 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 08:58:20,277 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 08:58:20,278 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 08:58:20,279 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 08:58:20,280 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 08:58:20,282 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 08:58:20,284 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 08:58:20,286 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 08:58:20,287 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 08:58:20,288 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 08:58:20,291 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 08:58:20,291 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 08:58:20,292 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 08:58:20,293 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 08:58:20,294 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 08:58:20,295 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 08:58:20,296 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 08:58:20,297 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 08:58:20,297 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 08:58:20,298 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 08:58:20,301 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 08:58:20,330 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 08:58:20,330 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 08:58:20,332 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 08:58:20,332 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 08:58:20,332 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 08:58:20,332 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 08:58:20,333 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 08:58:20,333 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 08:58:20,333 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 08:58:20,333 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 08:58:20,333 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 08:58:20,336 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 08:58:20,336 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 08:58:20,336 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 08:58:20,337 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 08:58:20,338 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 08:58:20,338 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 08:58:20,338 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 08:58:20,338 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 08:58:20,338 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 08:58:20,340 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 08:58:20,340 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 08:58:20,340 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 08:58:20,340 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 08:58:20,340 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 08:58:20,341 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 08:58:20,341 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:58:20,341 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 08:58:20,341 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 08:58:20,342 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 08:58:20,342 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 08:58:20,342 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 08:58:20,342 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 08:58:20,343 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 08:58:20,343 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 08:58:20,343 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 08:58:20,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 08:58:20,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 08:58:20,426 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 08:58:20,428 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 08:58:20,429 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 08:58:20,430 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09_true-unreach-call_false-termination.c [2018-11-07 08:58:20,495 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765a5b708/ead7666ac33e4dcab00a41340c280ad7/FLAG82271422e [2018-11-07 08:58:21,155 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 08:58:21,159 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label09_true-unreach-call_false-termination.c [2018-11-07 08:58:21,184 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765a5b708/ead7666ac33e4dcab00a41340c280ad7/FLAG82271422e [2018-11-07 08:58:21,205 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765a5b708/ead7666ac33e4dcab00a41340c280ad7 [2018-11-07 08:58:21,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 08:58:21,221 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 08:58:21,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 08:58:21,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 08:58:21,233 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 08:58:21,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:58:21" (1/1) ... [2018-11-07 08:58:21,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567b4d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:21, skipping insertion in model container [2018-11-07 08:58:21,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:58:21" (1/1) ... [2018-11-07 08:58:21,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 08:58:21,334 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 08:58:21,808 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:58:21,812 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 08:58:22,018 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 08:58:22,042 INFO L193 MainTranslator]: Completed translation [2018-11-07 08:58:22,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22 WrapperNode [2018-11-07 08:58:22,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 08:58:22,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 08:58:22,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 08:58:22,044 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 08:58:22,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 08:58:22,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 08:58:22,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 08:58:22,210 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 08:58:22,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... [2018-11-07 08:58:22,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 08:58:22,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 08:58:22,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 08:58:22,339 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 08:58:22,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 08:58:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 08:58:22,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 08:58:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 08:58:22,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 08:58:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 08:58:22,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 08:58:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 08:58:22,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 08:58:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 08:58:26,348 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 08:58:26,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:58:26 BoogieIcfgContainer [2018-11-07 08:58:26,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 08:58:26,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 08:58:26,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 08:58:26,354 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 08:58:26,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:58:21" (1/3) ... [2018-11-07 08:58:26,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f47c64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:58:26, skipping insertion in model container [2018-11-07 08:58:26,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:58:22" (2/3) ... [2018-11-07 08:58:26,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f47c64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:58:26, skipping insertion in model container [2018-11-07 08:58:26,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:58:26" (3/3) ... [2018-11-07 08:58:26,358 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label09_true-unreach-call_false-termination.c [2018-11-07 08:58:26,368 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 08:58:26,378 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 08:58:26,395 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 08:58:26,436 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 08:58:26,436 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 08:58:26,436 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 08:58:26,436 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 08:58:26,436 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 08:58:26,437 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 08:58:26,437 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 08:58:26,437 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 08:58:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 08:58:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-07 08:58:26,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:58:26,478 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:58:26,480 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:58:26,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:58:26,487 INFO L82 PathProgramCache]: Analyzing trace with hash 968801788, now seen corresponding path program 1 times [2018-11-07 08:58:26,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:58:26,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:58:26,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:58:26,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:58:26,543 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:58:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:58:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:58:27,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:58:27,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:58:27,013 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:58:27,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:58:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:58:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:58:27,042 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-07 08:58:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:58:30,390 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-11-07 08:58:30,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:58:30,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-11-07 08:58:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:58:30,425 INFO L225 Difference]: With dead ends: 894 [2018-11-07 08:58:30,425 INFO L226 Difference]: Without dead ends: 633 [2018-11-07 08:58:30,434 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:58:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-07 08:58:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-11-07 08:58:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-11-07 08:58:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-11-07 08:58:30,535 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 52 [2018-11-07 08:58:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:58:30,536 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-11-07 08:58:30,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:58:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-11-07 08:58:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-07 08:58:30,551 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:58:30,552 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 08:58:30,552 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:58:30,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:58:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -415473421, now seen corresponding path program 1 times [2018-11-07 08:58:30,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:58:30,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:58:30,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:58:30,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:58:30,555 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:58:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:58:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:58:30,958 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 08:58:30,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 08:58:30,958 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:58:30,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 08:58:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 08:58:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:58:30,962 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-11-07 08:58:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:58:34,182 INFO L93 Difference]: Finished difference Result 2358 states and 3740 transitions. [2018-11-07 08:58:34,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 08:58:34,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2018-11-07 08:58:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:58:34,202 INFO L225 Difference]: With dead ends: 2358 [2018-11-07 08:58:34,203 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 08:58:34,209 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 08:58:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 08:58:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 08:58:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 08:58:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2514 transitions. [2018-11-07 08:58:34,296 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2514 transitions. Word has length 165 [2018-11-07 08:58:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:58:34,297 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2514 transitions. [2018-11-07 08:58:34,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 08:58:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2514 transitions. [2018-11-07 08:58:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-07 08:58:34,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:58:34,311 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 08:58:34,311 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:58:34,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:58:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash 603968484, now seen corresponding path program 1 times [2018-11-07 08:58:34,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:58:34,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:58:34,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:58:34,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:58:34,316 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:58:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:58:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 08:58:34,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:58:34,966 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:58:34,967 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2018-11-07 08:58:34,969 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 08:58:35,019 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:58:35,019 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:58:35,619 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:58:35,626 INFO L272 AbstractInterpreter]: Visited 109 different actions 109 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 08:58:35,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:58:35,686 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:58:36,288 INFO L227 lantSequenceWeakener]: Weakened 231 states. On average, predicates are now at 77.98% of their original sizes. [2018-11-07 08:58:36,288 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:58:36,543 INFO L415 sIntCurrentIteration]: We unified 239 AI predicates to 239 [2018-11-07 08:58:36,547 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:58:36,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:58:36,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-11-07 08:58:36,548 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:58:36,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 08:58:36,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 08:58:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 08:58:36,551 INFO L87 Difference]: Start difference. First operand 1731 states and 2514 transitions. Second operand 6 states. [2018-11-07 08:59:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 08:59:04,640 INFO L93 Difference]: Finished difference Result 3641 states and 5264 transitions. [2018-11-07 08:59:04,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 08:59:04,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 240 [2018-11-07 08:59:04,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 08:59:04,653 INFO L225 Difference]: With dead ends: 3641 [2018-11-07 08:59:04,654 INFO L226 Difference]: Without dead ends: 1916 [2018-11-07 08:59:04,662 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 240 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 08:59:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-11-07 08:59:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-11-07 08:59:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-07 08:59:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2705 transitions. [2018-11-07 08:59:04,721 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2705 transitions. Word has length 240 [2018-11-07 08:59:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 08:59:04,722 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2705 transitions. [2018-11-07 08:59:04,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 08:59:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2705 transitions. [2018-11-07 08:59:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-11-07 08:59:04,734 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 08:59:04,735 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 08:59:04,735 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 08:59:04,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:59:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash -350582061, now seen corresponding path program 1 times [2018-11-07 08:59:04,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 08:59:04,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:59:04,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 08:59:04,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 08:59:04,737 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 08:59:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 08:59:05,267 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 08:59:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 222 proven. 161 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 08:59:05,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 08:59:05,730 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 08:59:05,730 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 326 with the following transitions: [2018-11-07 08:59:05,730 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 08:59:05,737 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 08:59:05,737 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 08:59:05,878 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 08:59:05,878 INFO L272 AbstractInterpreter]: Visited 113 different actions 219 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 08:59:05,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 08:59:05,917 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 08:59:06,250 INFO L227 lantSequenceWeakener]: Weakened 322 states. On average, predicates are now at 77.86% of their original sizes. [2018-11-07 08:59:06,251 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 08:59:06,816 INFO L415 sIntCurrentIteration]: We unified 324 AI predicates to 324 [2018-11-07 08:59:06,817 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 08:59:06,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 08:59:06,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-11-07 08:59:06,817 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 08:59:06,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 08:59:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 08:59:06,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 08:59:06,819 INFO L87 Difference]: Start difference. First operand 1914 states and 2705 transitions. Second operand 10 states. [2018-11-07 09:00:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:00:17,619 INFO L93 Difference]: Finished difference Result 4389 states and 6162 transitions. [2018-11-07 09:00:17,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 09:00:17,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 325 [2018-11-07 09:00:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:00:17,634 INFO L225 Difference]: With dead ends: 4389 [2018-11-07 09:00:17,635 INFO L226 Difference]: Without dead ends: 2664 [2018-11-07 09:00:17,644 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-11-07 09:00:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2018-11-07 09:00:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2661. [2018-11-07 09:00:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2661 states. [2018-11-07 09:00:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3534 transitions. [2018-11-07 09:00:17,713 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3534 transitions. Word has length 325 [2018-11-07 09:00:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:00:17,714 INFO L480 AbstractCegarLoop]: Abstraction has 2661 states and 3534 transitions. [2018-11-07 09:00:17,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 09:00:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3534 transitions. [2018-11-07 09:00:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-07 09:00:17,726 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:00:17,727 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:00:17,727 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:00:17,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:00:17,728 INFO L82 PathProgramCache]: Analyzing trace with hash 294780503, now seen corresponding path program 1 times [2018-11-07 09:00:17,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:00:17,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:00:17,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:00:17,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:00:17,729 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:00:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:00:18,299 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 09:00:18,496 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 09:00:18,716 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 09:00:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 249 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 09:00:19,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:00:19,465 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:00:19,465 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-11-07 09:00:19,466 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [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], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 09:00:19,471 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:00:19,471 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:00:19,662 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 09:00:19,662 INFO L272 AbstractInterpreter]: Visited 143 different actions 280 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 09:00:19,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:00:19,671 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 09:00:20,020 INFO L227 lantSequenceWeakener]: Weakened 368 states. On average, predicates are now at 77.78% of their original sizes. [2018-11-07 09:00:20,020 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 09:00:20,402 INFO L415 sIntCurrentIteration]: We unified 370 AI predicates to 370 [2018-11-07 09:00:20,402 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 09:00:20,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:00:20,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2018-11-07 09:00:20,403 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:00:20,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 09:00:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 09:00:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 09:00:20,404 INFO L87 Difference]: Start difference. First operand 2661 states and 3534 transitions. Second operand 10 states. [2018-11-07 09:00:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:00:46,212 INFO L93 Difference]: Finished difference Result 5321 states and 7109 transitions. [2018-11-07 09:00:46,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 09:00:46,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 371 [2018-11-07 09:00:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:00:46,228 INFO L225 Difference]: With dead ends: 5321 [2018-11-07 09:00:46,228 INFO L226 Difference]: Without dead ends: 2849 [2018-11-07 09:00:46,239 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 378 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-11-07 09:00:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2018-11-07 09:00:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2846. [2018-11-07 09:00:46,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2846 states. [2018-11-07 09:00:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 3733 transitions. [2018-11-07 09:00:46,307 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 3733 transitions. Word has length 371 [2018-11-07 09:00:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:00:46,308 INFO L480 AbstractCegarLoop]: Abstraction has 2846 states and 3733 transitions. [2018-11-07 09:00:46,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 09:00:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 3733 transitions. [2018-11-07 09:00:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-07 09:00:46,319 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:00:46,319 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:00:46,320 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:00:46,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:00:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -825070805, now seen corresponding path program 1 times [2018-11-07 09:00:46,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:00:46,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:00:46,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:00:46,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:00:46,322 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:00:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:00:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 273 proven. 111 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 09:00:46,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:00:46,742 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:00:46,742 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 378 with the following transitions: [2018-11-07 09:00:46,743 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 09:00:46,746 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:00:46,747 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:00:51,452 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 09:00:51,453 INFO L272 AbstractInterpreter]: Visited 120 different actions 359 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 09:00:51,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:00:51,466 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 09:00:52,303 INFO L227 lantSequenceWeakener]: Weakened 374 states. On average, predicates are now at 80.48% of their original sizes. [2018-11-07 09:00:52,303 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 09:00:52,372 INFO L415 sIntCurrentIteration]: We unified 376 AI predicates to 376 [2018-11-07 09:00:52,372 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 09:00:52,372 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:00:52,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-11-07 09:00:52,373 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:00:52,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 09:00:52,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 09:00:52,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 09:00:52,374 INFO L87 Difference]: Start difference. First operand 2846 states and 3733 transitions. Second operand 9 states. [2018-11-07 09:01:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:01:22,112 INFO L93 Difference]: Finished difference Result 6935 states and 9671 transitions. [2018-11-07 09:01:22,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 09:01:22,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 377 [2018-11-07 09:01:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:01:22,135 INFO L225 Difference]: With dead ends: 6935 [2018-11-07 09:01:22,136 INFO L226 Difference]: Without dead ends: 4463 [2018-11-07 09:01:22,152 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 383 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-11-07 09:01:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2018-11-07 09:01:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4425. [2018-11-07 09:01:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4425 states. [2018-11-07 09:01:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 5669 transitions. [2018-11-07 09:01:22,268 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 5669 transitions. Word has length 377 [2018-11-07 09:01:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:01:22,269 INFO L480 AbstractCegarLoop]: Abstraction has 4425 states and 5669 transitions. [2018-11-07 09:01:22,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 09:01:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 5669 transitions. [2018-11-07 09:01:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-11-07 09:01:22,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:01:22,287 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:01:22,287 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:01:22,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:01:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash -175891192, now seen corresponding path program 1 times [2018-11-07 09:01:22,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:01:22,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:01:22,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:01:22,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:01:22,289 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:01:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:01:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 273 proven. 181 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-11-07 09:01:22,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:01:22,851 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:01:22,851 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 457 with the following transitions: [2018-11-07 09:01:22,851 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [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], [750], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 09:01:22,856 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:01:22,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:01:23,234 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:01:23,235 INFO L272 AbstractInterpreter]: Visited 145 different actions 583 times. Merged at 9 different actions 39 times. Never widened. Found 11 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 09:01:23,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:01:23,237 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:01:23,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:01:23,237 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:01:23,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:01:23,255 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:01:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:01:23,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:01:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 515 proven. 2 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2018-11-07 09:01:23,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:01:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 273 proven. 181 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2018-11-07 09:01:24,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:01:24,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 09:01:24,559 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:01:24,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 09:01:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 09:01:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-07 09:01:24,561 INFO L87 Difference]: Start difference. First operand 4425 states and 5669 transitions. Second operand 9 states. [2018-11-07 09:01:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:01:31,213 INFO L93 Difference]: Finished difference Result 8923 states and 11823 transitions. [2018-11-07 09:01:31,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 09:01:31,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 456 [2018-11-07 09:01:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:01:31,239 INFO L225 Difference]: With dead ends: 8923 [2018-11-07 09:01:31,239 INFO L226 Difference]: Without dead ends: 4503 [2018-11-07 09:01:31,263 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 929 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2018-11-07 09:01:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2018-11-07 09:01:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4481. [2018-11-07 09:01:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4481 states. [2018-11-07 09:01:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 5447 transitions. [2018-11-07 09:01:31,379 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 5447 transitions. Word has length 456 [2018-11-07 09:01:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:01:31,379 INFO L480 AbstractCegarLoop]: Abstraction has 4481 states and 5447 transitions. [2018-11-07 09:01:31,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 09:01:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 5447 transitions. [2018-11-07 09:01:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2018-11-07 09:01:31,389 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:01:31,389 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 09:01:31,390 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:01:31,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:01:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash -135981845, now seen corresponding path program 1 times [2018-11-07 09:01:31,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:01:31,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:01:31,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:01:31,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:01:31,392 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:01:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:01:31,832 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 09:01:32,783 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 09:01:33,082 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 09:01:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 397 proven. 267 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 09:01:33,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:01:33,777 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:01:33,777 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 482 with the following transitions: [2018-11-07 09:01:33,777 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [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], [750], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 09:01:33,781 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:01:33,781 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:01:39,752 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:01:39,752 INFO L272 AbstractInterpreter]: Visited 145 different actions 578 times. Merged at 9 different actions 34 times. Never widened. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 09:01:39,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:01:39,760 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:01:39,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:01:39,760 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:01:39,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:01:39,776 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:01:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:01:39,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:01:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 578 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-07 09:01:40,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:01:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 412 proven. 73 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2018-11-07 09:01:40,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:01:40,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2018-11-07 09:01:40,986 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:01:40,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-07 09:01:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-07 09:01:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-11-07 09:01:40,987 INFO L87 Difference]: Start difference. First operand 4481 states and 5447 transitions. Second operand 14 states. [2018-11-07 09:01:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:01:47,624 INFO L93 Difference]: Finished difference Result 11656 states and 15165 transitions. [2018-11-07 09:01:47,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-07 09:01:47,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 481 [2018-11-07 09:01:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:01:47,652 INFO L225 Difference]: With dead ends: 11656 [2018-11-07 09:01:47,653 INFO L226 Difference]: Without dead ends: 5748 [2018-11-07 09:01:47,674 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 984 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2018-11-07 09:01:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2018-11-07 09:01:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 5704. [2018-11-07 09:01:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5704 states. [2018-11-07 09:01:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6615 transitions. [2018-11-07 09:01:47,819 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6615 transitions. Word has length 481 [2018-11-07 09:01:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:01:47,820 INFO L480 AbstractCegarLoop]: Abstraction has 5704 states and 6615 transitions. [2018-11-07 09:01:47,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-07 09:01:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6615 transitions. [2018-11-07 09:01:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-11-07 09:01:47,833 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:01:47,834 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:01:47,834 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:01:47,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:01:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1085094168, now seen corresponding path program 1 times [2018-11-07 09:01:47,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:01:47,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:01:47,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:01:47,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:01:47,836 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:01:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:01:48,472 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 09:01:48,684 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 09:01:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 556 proven. 399 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-11-07 09:01:49,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:01:49,747 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:01:49,747 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 547 with the following transitions: [2018-11-07 09:01:49,747 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 09:01:49,749 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:01:49,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:02:04,942 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:02:04,942 INFO L272 AbstractInterpreter]: Visited 125 different actions 500 times. Merged at 9 different actions 36 times. Never widened. Found 10 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 09:02:04,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:02:04,953 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:02:04,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:02:04,953 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:02:04,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:02:04,963 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:02:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:02:05,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:02:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2018-11-07 09:02:05,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:02:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2018-11-07 09:02:05,622 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:02:05,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [12] total 13 [2018-11-07 09:02:05,622 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:02:05,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 09:02:05,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 09:02:05,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-07 09:02:05,624 INFO L87 Difference]: Start difference. First operand 5704 states and 6615 transitions. Second operand 3 states. [2018-11-07 09:02:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:02:06,513 INFO L93 Difference]: Finished difference Result 13400 states and 15635 transitions. [2018-11-07 09:02:06,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 09:02:06,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 546 [2018-11-07 09:02:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:02:06,551 INFO L225 Difference]: With dead ends: 13400 [2018-11-07 09:02:06,551 INFO L226 Difference]: Without dead ends: 8070 [2018-11-07 09:02:06,569 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1092 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-11-07 09:02:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8070 states. [2018-11-07 09:02:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8070 to 7902. [2018-11-07 09:02:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7902 states. [2018-11-07 09:02:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7902 states to 7902 states and 9025 transitions. [2018-11-07 09:02:06,706 INFO L78 Accepts]: Start accepts. Automaton has 7902 states and 9025 transitions. Word has length 546 [2018-11-07 09:02:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:02:06,707 INFO L480 AbstractCegarLoop]: Abstraction has 7902 states and 9025 transitions. [2018-11-07 09:02:06,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 09:02:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 7902 states and 9025 transitions. [2018-11-07 09:02:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2018-11-07 09:02:06,720 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:02:06,721 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:02:06,721 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:02:06,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:02:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1079910227, now seen corresponding path program 1 times [2018-11-07 09:02:06,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:02:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:02:06,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:02:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:02:06,723 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:02:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:02:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 556 proven. 467 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2018-11-07 09:02:07,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:02:07,943 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:02:07,943 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 576 with the following transitions: [2018-11-07 09:02:07,943 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 09:02:07,945 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:02:07,945 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:02:23,374 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:02:23,374 INFO L272 AbstractInterpreter]: Visited 125 different actions 500 times. Merged at 9 different actions 36 times. Never widened. Found 10 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 09:02:23,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:02:23,382 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:02:23,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:02:23,382 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:02:23,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:02:23,393 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:02:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:02:23,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:02:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2018-11-07 09:02:23,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-11-07 09:02:24,336 WARN L187 SmtUtils]: Removed 1 from assertion stack [2018-11-07 09:02:24,336 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 09:02:24,537 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:02:24,538 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 09:02:24,543 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 09:02:24,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:02:24 BoogieIcfgContainer [2018-11-07 09:02:24,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 09:02:24,545 INFO L168 Benchmark]: Toolchain (without parser) took 243324.93 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 222.0 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-07 09:02:24,546 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 09:02:24,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.91 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: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2018-11-07 09:02:24,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.21 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -823.2 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2018-11-07 09:02:24,548 INFO L168 Benchmark]: Boogie Preprocessor took 129.09 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 09:02:24,548 INFO L168 Benchmark]: RCFGBuilder took 4010.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 145.0 MB). Peak memory consumption was 145.0 MB. Max. memory is 7.1 GB. [2018-11-07 09:02:24,549 INFO L168 Benchmark]: TraceAbstraction took 238193.75 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.2 GB in the end (delta: 844.7 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-11-07 09:02:24,553 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 820.91 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: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 165.21 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -823.2 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.09 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4010.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 145.0 MB). Peak memory consumption was 145.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238193.75 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.0 GB in the beginning and 1.2 GB in the end (delta: 844.7 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 139]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 139). Cancelled while BasicCegarLoop was analyzing trace of length 576 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 238.1s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 175.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1454 SDtfs, 9028 SDslu, 2539 SDs, 0 SdLazy, 17712 SolverSat, 3160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.9s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4439 GetRequests, 4294 SyntacticMatches, 6 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7902occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 42.8s AbstIntTime, 8 AbstIntIterations, 4 AbstIntStrong, 0.9972242326588151 AbsIntWeakeningRatio, 0.0932009167303285 AbsIntAvgWeakeningVarsNumRemoved, 16.146676852559207 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 9 MinimizatonAttempts, 280 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 4496 NumberOfCodeBlocks, 4496 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 5964 ConstructedInterpolants, 0 QuantifiedInterpolants, 12734677 SizeOfPredicates, 4 NumberOfNonLiveVariables, 2290 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 7516/9035 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown