java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:53:22,332 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:53:22,334 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:53:22,348 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:53:22,348 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:53:22,349 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:53:22,350 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:53:22,352 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:53:22,354 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:53:22,355 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:53:22,356 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:53:22,356 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:53:22,357 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:53:22,358 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:53:22,359 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:53:22,360 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:53:22,361 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:53:22,363 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:53:22,365 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:53:22,366 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:53:22,367 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:53:22,369 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:53:22,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:53:22,375 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:53:22,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:53:22,377 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:53:22,378 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:53:22,382 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:53:22,382 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:53:22,383 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:53:22,384 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:53:22,385 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 11:53:22,389 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 11:53:22,417 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:53:22,418 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:53:22,418 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:53:22,419 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:53:22,422 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:53:22,422 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:53:22,422 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:53:22,423 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:53:22,423 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:53:22,423 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:53:22,423 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:53:22,423 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:53:22,425 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:53:22,425 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:53:22,425 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:53:22,426 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:53:22,426 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:53:22,426 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:53:22,426 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:53:22,426 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:53:22,427 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:53:22,428 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:53:22,429 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:53:22,429 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:53:22,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:53:22,429 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:53:22,429 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:53:22,430 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:53:22,430 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:53:22,430 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:53:22,430 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:53:22,430 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:53:22,431 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:53:22,431 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:53:22,485 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:53:22,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:53:22,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:53:22,508 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:53:22,508 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:53:22,509 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c [2018-10-27 11:53:22,573 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e08fb67b/31a8656e19884cf8963a6e57d26c449b/FLAG7354a56fa [2018-10-27 11:53:23,250 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:53:23,252 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label20_false-unreach-call.c [2018-10-27 11:53:23,280 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e08fb67b/31a8656e19884cf8963a6e57d26c449b/FLAG7354a56fa [2018-10-27 11:53:23,300 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e08fb67b/31a8656e19884cf8963a6e57d26c449b [2018-10-27 11:53:23,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:53:23,316 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:53:23,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:53:23,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:53:23,322 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:53:23,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:53:23" (1/1) ... [2018-10-27 11:53:23,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79cb8626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:23, skipping insertion in model container [2018-10-27 11:53:23,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:53:23" (1/1) ... [2018-10-27 11:53:23,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:53:23,461 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:53:24,370 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:53:24,375 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:53:24,755 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:53:24,780 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:53:24,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24 WrapperNode [2018-10-27 11:53:24,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:53:24,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:53:24,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:53:24,782 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:53:24,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:24,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:53:25,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:53:25,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:53:25,245 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:53:25,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... [2018-10-27 11:53:25,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:53:25,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:53:25,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:53:25,514 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:53:25,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:53:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:53:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:53:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 11:53:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 11:53:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:53:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:53:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:53:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:53:25,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:53:25,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:53:36,157 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:53:36,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:53:36 BoogieIcfgContainer [2018-10-27 11:53:36,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:53:36,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:53:36,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:53:36,163 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:53:36,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:53:23" (1/3) ... [2018-10-27 11:53:36,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22741177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:53:36, skipping insertion in model container [2018-10-27 11:53:36,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:24" (2/3) ... [2018-10-27 11:53:36,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22741177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:53:36, skipping insertion in model container [2018-10-27 11:53:36,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:53:36" (3/3) ... [2018-10-27 11:53:36,167 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label20_false-unreach-call.c [2018-10-27 11:53:36,177 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:53:36,186 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:53:36,204 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:53:36,247 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:53:36,247 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:53:36,247 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:53:36,248 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:53:36,248 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:53:36,248 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:53:36,248 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:53:36,248 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:53:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 11:53:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-27 11:53:36,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:53:36,294 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] [2018-10-27 11:53:36,297 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:53:36,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:53:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1249764322, now seen corresponding path program 1 times [2018-10-27 11:53:36,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:53:36,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:53:36,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:53:36,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:53:36,366 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:53:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:53:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:53:36,728 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:53:36,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:53:36,728 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:53:36,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:53:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:53:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:53:36,754 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 11:53:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:53:46,676 INFO L93 Difference]: Finished difference Result 2137 states and 3966 transitions. [2018-10-27 11:53:46,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:53:46,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-27 11:53:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:53:46,720 INFO L225 Difference]: With dead ends: 2137 [2018-10-27 11:53:46,720 INFO L226 Difference]: Without dead ends: 1527 [2018-10-27 11:53:46,735 INFO L605 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 [2018-10-27 11:53:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2018-10-27 11:53:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1513. [2018-10-27 11:53:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2018-10-27 11:53:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2344 transitions. [2018-10-27 11:53:46,896 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2344 transitions. Word has length 33 [2018-10-27 11:53:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:53:46,896 INFO L481 AbstractCegarLoop]: Abstraction has 1513 states and 2344 transitions. [2018-10-27 11:53:46,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:53:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2344 transitions. [2018-10-27 11:53:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-27 11:53:46,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:53:46,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:53:46,903 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:53:46,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:53:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1581854865, now seen corresponding path program 1 times [2018-10-27 11:53:46,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:53:46,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:53:46,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:53:46,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:53:46,906 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:53:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:53:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:53:47,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:53:47,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 11:53:47,326 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:53:47,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 11:53:47,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 11:53:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 11:53:47,329 INFO L87 Difference]: Start difference. First operand 1513 states and 2344 transitions. Second operand 5 states. [2018-10-27 11:53:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:53:57,143 INFO L93 Difference]: Finished difference Result 4413 states and 7007 transitions. [2018-10-27 11:53:57,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:53:57,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2018-10-27 11:53:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:53:57,170 INFO L225 Difference]: With dead ends: 4413 [2018-10-27 11:53:57,170 INFO L226 Difference]: Without dead ends: 2906 [2018-10-27 11:53:57,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:53:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2018-10-27 11:53:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2873. [2018-10-27 11:53:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2018-10-27 11:53:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 4204 transitions. [2018-10-27 11:53:57,284 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 4204 transitions. Word has length 105 [2018-10-27 11:53:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:53:57,285 INFO L481 AbstractCegarLoop]: Abstraction has 2873 states and 4204 transitions. [2018-10-27 11:53:57,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 11:53:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 4204 transitions. [2018-10-27 11:53:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-27 11:53:57,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:53:57,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:53:57,290 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:53:57,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:53:57,291 INFO L82 PathProgramCache]: Analyzing trace with hash 129577417, now seen corresponding path program 1 times [2018-10-27 11:53:57,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:53:57,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:53:57,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:53:57,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:53:57,293 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:53:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:53:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:53:57,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:53:57,551 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:53:57,552 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 109 with the following transitions: [2018-10-27 11:53:57,554 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 11:53:57,603 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:53:57,604 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:53:58,002 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:54:00,704 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:54:00,706 INFO L272 AbstractInterpreter]: Visited 83 different actions 467 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 11:54:00,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:00,745 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:54:00,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:00,745 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 11:54:00,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:00,760 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:54:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:00,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:54:29,691 WARN L179 SmtUtils]: Spent 24.27 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-27 11:54:50,105 WARN L179 SmtUtils]: Spent 16.14 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-27 11:54:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:50,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:54:54,757 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-27 11:54:54,936 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-27 11:54:57,598 WARN L179 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-27 11:54:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:57,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 11:54:57,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-27 11:54:57,908 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:54:57,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:54:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:54:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-10-27 11:54:57,910 INFO L87 Difference]: Start difference. First operand 2873 states and 4204 transitions. Second operand 6 states. [2018-10-27 11:56:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:56:10,573 INFO L93 Difference]: Finished difference Result 11144 states and 16981 transitions. [2018-10-27 11:56:10,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 11:56:10,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2018-10-27 11:56:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:56:10,627 INFO L225 Difference]: With dead ends: 11144 [2018-10-27 11:56:10,627 INFO L226 Difference]: Without dead ends: 8277 [2018-10-27 11:56:10,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2018-10-27 11:56:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2018-10-27 11:56:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8241. [2018-10-27 11:56:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2018-10-27 11:56:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11915 transitions. [2018-10-27 11:56:10,887 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11915 transitions. Word has length 108 [2018-10-27 11:56:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:56:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 8241 states and 11915 transitions. [2018-10-27 11:56:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:56:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11915 transitions. [2018-10-27 11:56:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-27 11:56:10,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:56:10,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:56:10,895 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:56:10,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:56:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash -244022956, now seen corresponding path program 1 times [2018-10-27 11:56:10,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:56:10,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:56:10,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:56:10,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:56:10,897 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:56:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:56:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:56:11,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:56:11,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 11:56:11,205 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:56:11,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:56:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:56:11,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 11:56:11,206 INFO L87 Difference]: Start difference. First operand 8241 states and 11915 transitions. Second operand 6 states. [2018-10-27 11:56:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:56:17,308 INFO L93 Difference]: Finished difference Result 20153 states and 29857 transitions. [2018-10-27 11:56:17,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 11:56:17,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-10-27 11:56:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:56:17,390 INFO L225 Difference]: With dead ends: 20153 [2018-10-27 11:56:17,390 INFO L226 Difference]: Without dead ends: 11918 [2018-10-27 11:56:17,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 11:56:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2018-10-27 11:56:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 11820. [2018-10-27 11:56:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11820 states. [2018-10-27 11:56:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 15177 transitions. [2018-10-27 11:56:17,747 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 15177 transitions. Word has length 177 [2018-10-27 11:56:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:56:17,748 INFO L481 AbstractCegarLoop]: Abstraction has 11820 states and 15177 transitions. [2018-10-27 11:56:17,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:56:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 15177 transitions. [2018-10-27 11:56:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-27 11:56:17,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:56:17,754 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:56:17,755 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:56:17,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:56:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1544409704, now seen corresponding path program 1 times [2018-10-27 11:56:17,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:56:17,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:56:17,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:56:17,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:56:17,759 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:56:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:56:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-27 11:56:18,116 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:56:18,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:56:18,117 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:56:18,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:56:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:56:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:56:18,118 INFO L87 Difference]: Start difference. First operand 11820 states and 15177 transitions. Second operand 4 states. [2018-10-27 11:56:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:56:27,633 INFO L93 Difference]: Finished difference Result 39446 states and 52321 transitions. [2018-10-27 11:56:27,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:56:27,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2018-10-27 11:56:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:56:27,747 INFO L225 Difference]: With dead ends: 39446 [2018-10-27 11:56:27,747 INFO L226 Difference]: Without dead ends: 27632 [2018-10-27 11:56:27,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:56:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27632 states. [2018-10-27 11:56:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27632 to 27625. [2018-10-27 11:56:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27625 states. [2018-10-27 11:56:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27625 states to 27625 states and 33950 transitions. [2018-10-27 11:56:28,449 INFO L78 Accepts]: Start accepts. Automaton has 27625 states and 33950 transitions. Word has length 197 [2018-10-27 11:56:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:56:28,449 INFO L481 AbstractCegarLoop]: Abstraction has 27625 states and 33950 transitions. [2018-10-27 11:56:28,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:56:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 27625 states and 33950 transitions. [2018-10-27 11:56:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-27 11:56:28,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:56:28,461 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 11:56:28,462 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:56:28,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:56:28,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1794949215, now seen corresponding path program 1 times [2018-10-27 11:56:28,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:56:28,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:56:28,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:56:28,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:56:28,463 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:56:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:56:29,151 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-27 11:56:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 52 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 11:56:29,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:56:29,440 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:56:29,440 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-10-27 11:56:29,440 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1306], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 11:56:29,458 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:56:29,458 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:56:29,701 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:56:30,542 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 11:56:30,542 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 11:56:30,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:56:30,583 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 11:56:31,731 INFO L227 lantSequenceWeakener]: Weakened 215 states. On average, predicates are now at 75.39% of their original sizes. [2018-10-27 11:56:31,731 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 11:56:32,485 INFO L415 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2018-10-27 11:56:32,485 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 11:56:32,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:56:32,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-10-27 11:56:32,486 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:56:32,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 11:56:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 11:56:32,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-10-27 11:56:32,488 INFO L87 Difference]: Start difference. First operand 27625 states and 33950 transitions. Second operand 10 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown