java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 22:41:32,377 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 22:41:32,379 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 22:41:32,395 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 22:41:32,395 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 22:41:32,396 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 22:41:32,397 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 22:41:32,399 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 22:41:32,401 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 22:41:32,402 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 22:41:32,403 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 22:41:32,403 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 22:41:32,404 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 22:41:32,405 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 22:41:32,406 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 22:41:32,407 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 22:41:32,408 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 22:41:32,410 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 22:41:32,412 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 22:41:32,414 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 22:41:32,415 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 22:41:32,416 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 22:41:32,419 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 22:41:32,428 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 22:41:32,447 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 22:41:32,447 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 22:41:32,448 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 22:41:32,448 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 22:41:32,448 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 22:41:32,449 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 22:41:32,449 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 22:41:32,449 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 22:41:32,449 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 22:41:32,449 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 22:41:32,449 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 22:41:32,450 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 22:41:32,450 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 22:41:32,450 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 22:41:32,451 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 22:41:32,451 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 22:41:32,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 22:41:32,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 22:41:32,452 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 22:41:32,452 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 22:41:32,452 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 22:41:32,453 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 22:41:32,453 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 22:41:32,453 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 22:41:32,453 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 22:41:32,453 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 22:41:32,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 22:41:32,454 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 22:41:32,454 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 22:41:32,454 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 22:41:32,454 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 22:41:32,454 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 22:41:32,455 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 22:41:32,455 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 22:41:32,455 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 22:41:32,456 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 22:41:32,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 22:41:32,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 22:41:32,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 22:41:32,532 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 22:41:32,532 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 22:41:32,533 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c [2018-10-24 22:41:32,591 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/22a1c9ce0/c793d01a6129406b9c324dc88c229231/FLAG78f978b37 [2018-10-24 22:41:33,213 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 22:41:33,213 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c [2018-10-24 22:41:33,232 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/22a1c9ce0/c793d01a6129406b9c324dc88c229231/FLAG78f978b37 [2018-10-24 22:41:33,247 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/22a1c9ce0/c793d01a6129406b9c324dc88c229231 [2018-10-24 22:41:33,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 22:41:33,263 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 22:41:33,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 22:41:33,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 22:41:33,274 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 22:41:33,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:41:33" (1/1) ... [2018-10-24 22:41:33,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68109397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:33, skipping insertion in model container [2018-10-24 22:41:33,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:41:33" (1/1) ... [2018-10-24 22:41:33,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 22:41:33,390 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 22:41:34,174 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 22:41:34,179 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 22:41:34,506 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 22:41:34,531 INFO L193 MainTranslator]: Completed translation [2018-10-24 22:41:34,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34 WrapperNode [2018-10-24 22:41:34,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 22:41:34,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 22:41:34,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 22:41:34,534 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 22:41:34,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,589 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 22:41:34,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 22:41:34,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 22:41:34,855 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 22:41:34,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... [2018-10-24 22:41:34,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 22:41:34,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 22:41:34,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 22:41:34,982 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 22:41:34,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 22:41:35,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 22:41:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 22:41:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 22:41:35,052 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 22:41:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 22:41:35,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 22:41:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 22:41:35,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 22:41:40,046 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 22:41:40,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:41:40 BoogieIcfgContainer [2018-10-24 22:41:40,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 22:41:40,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 22:41:40,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 22:41:40,055 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 22:41:40,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:41:33" (1/3) ... [2018-10-24 22:41:40,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702aa836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:41:40, skipping insertion in model container [2018-10-24 22:41:40,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:34" (2/3) ... [2018-10-24 22:41:40,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702aa836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:41:40, skipping insertion in model container [2018-10-24 22:41:40,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:41:40" (3/3) ... [2018-10-24 22:41:40,061 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28_false-unreach-call.c [2018-10-24 22:41:40,071 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 22:41:40,084 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 22:41:40,102 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 22:41:40,157 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 22:41:40,158 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 22:41:40,158 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 22:41:40,158 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 22:41:40,158 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 22:41:40,158 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 22:41:40,159 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 22:41:40,159 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 22:41:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-24 22:41:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-24 22:41:40,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:40,232 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:41:40,235 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:40,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2014682908, now seen corresponding path program 1 times [2018-10-24 22:41:40,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:40,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:40,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:40,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:40,307 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:41,197 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:41:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:41,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:41:41,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 22:41:41,375 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:41:41,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 22:41:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 22:41:41,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:41:41,406 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-24 22:41:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:41:43,385 INFO L93 Difference]: Finished difference Result 838 states and 1479 transitions. [2018-10-24 22:41:43,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 22:41:43,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2018-10-24 22:41:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:41:43,412 INFO L225 Difference]: With dead ends: 838 [2018-10-24 22:41:43,412 INFO L226 Difference]: Without dead ends: 524 [2018-10-24 22:41:43,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:41:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-10-24 22:41:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2018-10-24 22:41:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-10-24 22:41:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 890 transitions. [2018-10-24 22:41:43,527 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 890 transitions. Word has length 159 [2018-10-24 22:41:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:41:43,528 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 890 transitions. [2018-10-24 22:41:43,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 22:41:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 890 transitions. [2018-10-24 22:41:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-24 22:41:43,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:43,542 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:41:43,542 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:43,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1120639275, now seen corresponding path program 1 times [2018-10-24 22:41:43,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:43,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:43,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:43,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:43,549 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:43,930 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:41:43,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 22:41:43,930 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:41:43,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 22:41:43,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 22:41:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 22:41:43,934 INFO L87 Difference]: Start difference. First operand 522 states and 890 transitions. Second operand 6 states. [2018-10-24 22:41:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:41:47,429 INFO L93 Difference]: Finished difference Result 1581 states and 2759 transitions. [2018-10-24 22:41:47,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 22:41:47,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2018-10-24 22:41:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:41:47,451 INFO L225 Difference]: With dead ends: 1581 [2018-10-24 22:41:47,451 INFO L226 Difference]: Without dead ends: 1065 [2018-10-24 22:41:47,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 22:41:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2018-10-24 22:41:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1023. [2018-10-24 22:41:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-10-24 22:41:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1733 transitions. [2018-10-24 22:41:47,533 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1733 transitions. Word has length 169 [2018-10-24 22:41:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:41:47,533 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1733 transitions. [2018-10-24 22:41:47,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 22:41:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1733 transitions. [2018-10-24 22:41:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 22:41:47,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:47,539 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:41:47,539 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:47,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash -362863336, now seen corresponding path program 1 times [2018-10-24 22:41:47,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:47,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:47,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:47,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:47,541 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:47,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:41:47,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 22:41:47,833 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:41:47,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 22:41:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 22:41:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:41:47,836 INFO L87 Difference]: Start difference. First operand 1023 states and 1733 transitions. Second operand 3 states. [2018-10-24 22:41:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:41:50,581 INFO L93 Difference]: Finished difference Result 2887 states and 5063 transitions. [2018-10-24 22:41:50,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 22:41:50,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2018-10-24 22:41:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:41:50,599 INFO L225 Difference]: With dead ends: 2887 [2018-10-24 22:41:50,599 INFO L226 Difference]: Without dead ends: 1870 [2018-10-24 22:41:50,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:41:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2018-10-24 22:41:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1865. [2018-10-24 22:41:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2018-10-24 22:41:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 3055 transitions. [2018-10-24 22:41:50,681 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 3055 transitions. Word has length 172 [2018-10-24 22:41:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:41:50,682 INFO L481 AbstractCegarLoop]: Abstraction has 1865 states and 3055 transitions. [2018-10-24 22:41:50,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 22:41:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 3055 transitions. [2018-10-24 22:41:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-24 22:41:50,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:50,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:41:50,691 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:50,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1612799655, now seen corresponding path program 1 times [2018-10-24 22:41:50,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:50,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:50,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:50,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:50,694 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:51,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:41:51,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 22:41:51,064 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:41:51,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 22:41:51,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 22:41:51,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:41:51,066 INFO L87 Difference]: Start difference. First operand 1865 states and 3055 transitions. Second operand 3 states. [2018-10-24 22:41:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:41:52,900 INFO L93 Difference]: Finished difference Result 5412 states and 9175 transitions. [2018-10-24 22:41:52,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 22:41:52,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2018-10-24 22:41:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:41:52,930 INFO L225 Difference]: With dead ends: 5412 [2018-10-24 22:41:52,931 INFO L226 Difference]: Without dead ends: 3553 [2018-10-24 22:41:52,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 22:41:52,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2018-10-24 22:41:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3551. [2018-10-24 22:41:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3551 states. [2018-10-24 22:41:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5637 transitions. [2018-10-24 22:41:53,152 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5637 transitions. Word has length 192 [2018-10-24 22:41:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:41:53,152 INFO L481 AbstractCegarLoop]: Abstraction has 3551 states and 5637 transitions. [2018-10-24 22:41:53,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 22:41:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5637 transitions. [2018-10-24 22:41:53,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-24 22:41:53,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:53,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:41:53,167 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:53,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash -35084211, now seen corresponding path program 1 times [2018-10-24 22:41:53,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:53,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:53,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:53,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:53,169 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:53,454 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:41:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:53,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:41:53,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 22:41:53,826 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:41:53,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 22:41:53,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 22:41:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 22:41:53,828 INFO L87 Difference]: Start difference. First operand 3551 states and 5637 transitions. Second operand 6 states. [2018-10-24 22:41:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:41:56,000 INFO L93 Difference]: Finished difference Result 8962 states and 15042 transitions. [2018-10-24 22:41:56,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 22:41:56,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 197 [2018-10-24 22:41:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:41:56,050 INFO L225 Difference]: With dead ends: 8962 [2018-10-24 22:41:56,051 INFO L226 Difference]: Without dead ends: 5417 [2018-10-24 22:41:56,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 22:41:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2018-10-24 22:41:56,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5329. [2018-10-24 22:41:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5329 states. [2018-10-24 22:41:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5329 states to 5329 states and 7602 transitions. [2018-10-24 22:41:56,272 INFO L78 Accepts]: Start accepts. Automaton has 5329 states and 7602 transitions. Word has length 197 [2018-10-24 22:41:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:41:56,272 INFO L481 AbstractCegarLoop]: Abstraction has 5329 states and 7602 transitions. [2018-10-24 22:41:56,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 22:41:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5329 states and 7602 transitions. [2018-10-24 22:41:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-24 22:41:56,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:56,294 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 22:41:56,295 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:56,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1506539486, now seen corresponding path program 1 times [2018-10-24 22:41:56,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:56,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:56,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:56,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:56,297 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:56,600 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 22:41:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:56,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 22:41:56,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 22:41:56,654 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:41:56,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 22:41:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 22:41:56,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 22:41:56,656 INFO L87 Difference]: Start difference. First operand 5329 states and 7602 transitions. Second operand 6 states. [2018-10-24 22:41:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:41:58,836 INFO L93 Difference]: Finished difference Result 11197 states and 16329 transitions. [2018-10-24 22:41:58,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 22:41:58,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 218 [2018-10-24 22:41:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:41:58,873 INFO L225 Difference]: With dead ends: 11197 [2018-10-24 22:41:58,873 INFO L226 Difference]: Without dead ends: 5874 [2018-10-24 22:41:58,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 22:41:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2018-10-24 22:41:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 5601. [2018-10-24 22:41:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5601 states. [2018-10-24 22:41:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 7541 transitions. [2018-10-24 22:41:59,080 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 7541 transitions. Word has length 218 [2018-10-24 22:41:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:41:59,080 INFO L481 AbstractCegarLoop]: Abstraction has 5601 states and 7541 transitions. [2018-10-24 22:41:59,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 22:41:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 7541 transitions. [2018-10-24 22:41:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-24 22:41:59,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:41:59,102 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:41:59,102 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:41:59,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:41:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -693136218, now seen corresponding path program 1 times [2018-10-24 22:41:59,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:41:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:59,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:41:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:41:59,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:41:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:41:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:41:59,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:41:59,776 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:41:59,777 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 232 with the following transitions: [2018-10-24 22:41:59,780 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:41:59,851 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:41:59,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:42:00,979 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 22:42:00,981 INFO L272 AbstractInterpreter]: Visited 160 different actions 160 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-24 22:42:01,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:42:01,026 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 22:42:02,235 INFO L232 lantSequenceWeakener]: Weakened 222 states. On average, predicates are now at 70.41% of their original sizes. [2018-10-24 22:42:02,236 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 22:42:02,767 INFO L413 sIntCurrentIteration]: We have 230 unified AI predicates [2018-10-24 22:42:02,767 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 22:42:02,768 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 22:42:02,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-10-24 22:42:02,769 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:42:02,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 22:42:02,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 22:42:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-24 22:42:02,773 INFO L87 Difference]: Start difference. First operand 5601 states and 7541 transitions. Second operand 13 states. [2018-10-24 22:42:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:42:15,474 INFO L93 Difference]: Finished difference Result 11406 states and 15355 transitions. [2018-10-24 22:42:15,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 22:42:15,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 231 [2018-10-24 22:42:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:42:15,500 INFO L225 Difference]: With dead ends: 11406 [2018-10-24 22:42:15,501 INFO L226 Difference]: Without dead ends: 5811 [2018-10-24 22:42:15,517 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 231 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-10-24 22:42:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2018-10-24 22:42:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 5809. [2018-10-24 22:42:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5809 states. [2018-10-24 22:42:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 7758 transitions. [2018-10-24 22:42:15,664 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 7758 transitions. Word has length 231 [2018-10-24 22:42:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:42:15,665 INFO L481 AbstractCegarLoop]: Abstraction has 5809 states and 7758 transitions. [2018-10-24 22:42:15,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 22:42:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 7758 transitions. [2018-10-24 22:42:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-10-24 22:42:15,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:42:15,684 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:42:15,685 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:42:15,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:42:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1743759759, now seen corresponding path program 1 times [2018-10-24 22:42:15,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:42:15,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:42:15,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:42:15,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:42:15,687 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:42:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:42:16,301 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 22:42:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 22:42:16,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:42:16,503 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:42:16,503 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2018-10-24 22:42:16,504 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:42:16,517 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:42:16,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:42:19,479 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:42:19,480 INFO L272 AbstractInterpreter]: Visited 164 different actions 326 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-24 22:42:19,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:42:19,492 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:42:19,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:42:19,492 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:42:19,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:42:19,501 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:42:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:42:19,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:42:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 22:42:20,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:42:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 22:42:20,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:42:20,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2018-10-24 22:42:20,433 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:42:20,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 22:42:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 22:42:20,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-24 22:42:20,435 INFO L87 Difference]: Start difference. First operand 5809 states and 7758 transitions. Second operand 8 states. [2018-10-24 22:42:21,235 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 22:42:22,711 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 22:42:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:42:30,101 INFO L93 Difference]: Finished difference Result 28348 states and 42887 transitions. [2018-10-24 22:42:30,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 22:42:30,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 240 [2018-10-24 22:42:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:42:30,218 INFO L225 Difference]: With dead ends: 28348 [2018-10-24 22:42:30,218 INFO L226 Difference]: Without dead ends: 22753 [2018-10-24 22:42:30,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 22:42:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22753 states. [2018-10-24 22:42:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22753 to 22213. [2018-10-24 22:42:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22213 states. [2018-10-24 22:42:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22213 states to 22213 states and 27770 transitions. [2018-10-24 22:42:31,076 INFO L78 Accepts]: Start accepts. Automaton has 22213 states and 27770 transitions. Word has length 240 [2018-10-24 22:42:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:42:31,076 INFO L481 AbstractCegarLoop]: Abstraction has 22213 states and 27770 transitions. [2018-10-24 22:42:31,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 22:42:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22213 states and 27770 transitions. [2018-10-24 22:42:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-24 22:42:31,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:42:31,133 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:42:31,134 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:42:31,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:42:31,134 INFO L82 PathProgramCache]: Analyzing trace with hash -556279620, now seen corresponding path program 1 times [2018-10-24 22:42:31,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:42:31,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:42:31,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:42:31,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:42:31,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:42:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:42:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 95 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-24 22:42:31,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:42:31,665 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:42:31,665 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 249 with the following transitions: [2018-10-24 22:42:31,666 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:42:31,677 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:42:31,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:42:33,136 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 22:42:33,136 INFO L272 AbstractInterpreter]: Visited 164 different actions 322 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-24 22:42:33,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:42:33,174 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 22:42:35,403 INFO L232 lantSequenceWeakener]: Weakened 245 states. On average, predicates are now at 70.48% of their original sizes. [2018-10-24 22:42:35,404 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 22:42:36,221 INFO L413 sIntCurrentIteration]: We have 247 unified AI predicates [2018-10-24 22:42:36,222 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 22:42:36,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 22:42:36,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [6] total 25 [2018-10-24 22:42:36,223 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 22:42:36,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 22:42:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 22:42:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-10-24 22:42:36,225 INFO L87 Difference]: Start difference. First operand 22213 states and 27770 transitions. Second operand 21 states. [2018-10-24 22:43:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:43:04,224 INFO L93 Difference]: Finished difference Result 43993 states and 55116 transitions. [2018-10-24 22:43:04,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 22:43:04,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 248 [2018-10-24 22:43:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:43:04,300 INFO L225 Difference]: With dead ends: 43993 [2018-10-24 22:43:04,300 INFO L226 Difference]: Without dead ends: 22427 [2018-10-24 22:43:04,339 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 256 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2018-10-24 22:43:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22427 states. [2018-10-24 22:43:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22427 to 22424. [2018-10-24 22:43:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22424 states. [2018-10-24 22:43:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22424 states to 22424 states and 28000 transitions. [2018-10-24 22:43:04,863 INFO L78 Accepts]: Start accepts. Automaton has 22424 states and 28000 transitions. Word has length 248 [2018-10-24 22:43:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:43:04,863 INFO L481 AbstractCegarLoop]: Abstraction has 22424 states and 28000 transitions. [2018-10-24 22:43:04,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 22:43:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22424 states and 28000 transitions. [2018-10-24 22:43:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-24 22:43:04,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:43:04,935 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:43:04,935 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:43:04,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1198983913, now seen corresponding path program 1 times [2018-10-24 22:43:04,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:43:04,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:04,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:04,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:04,939 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:43:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:05,536 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 22:43:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 142 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-24 22:43:05,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:05,664 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:43:05,665 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 295 with the following transitions: [2018-10-24 22:43:05,665 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [409], [412], [416], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:43:05,673 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:43:05,673 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:43:08,438 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:43:08,439 INFO L272 AbstractInterpreter]: Visited 165 different actions 322 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-24 22:43:08,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:08,447 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:43:08,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:08,447 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:43:08,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:08,456 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:43:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:08,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:43:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-24 22:43:08,913 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:43:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-24 22:43:09,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:43:09,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-24 22:43:09,273 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:43:09,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 22:43:09,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 22:43:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-24 22:43:09,276 INFO L87 Difference]: Start difference. First operand 22424 states and 28000 transitions. Second operand 9 states. [2018-10-24 22:43:11,693 WARN L179 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-10-24 22:43:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:43:17,220 INFO L93 Difference]: Finished difference Result 62328 states and 80009 transitions. [2018-10-24 22:43:17,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-24 22:43:17,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 294 [2018-10-24 22:43:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:43:17,370 INFO L225 Difference]: With dead ends: 62328 [2018-10-24 22:43:17,371 INFO L226 Difference]: Without dead ends: 40548 [2018-10-24 22:43:17,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 626 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=605, Invalid=2365, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 22:43:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40548 states. [2018-10-24 22:43:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40548 to 40152. [2018-10-24 22:43:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40152 states. [2018-10-24 22:43:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40152 states to 40152 states and 46751 transitions. [2018-10-24 22:43:18,273 INFO L78 Accepts]: Start accepts. Automaton has 40152 states and 46751 transitions. Word has length 294 [2018-10-24 22:43:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:43:18,273 INFO L481 AbstractCegarLoop]: Abstraction has 40152 states and 46751 transitions. [2018-10-24 22:43:18,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 22:43:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 40152 states and 46751 transitions. [2018-10-24 22:43:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-24 22:43:18,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:43:18,321 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, 4, 4, 4, 4, 3, 3, 3, 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] [2018-10-24 22:43:18,321 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:43:18,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1448489725, now seen corresponding path program 1 times [2018-10-24 22:43:18,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:43:18,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:18,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:18,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:18,323 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:43:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 201 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-24 22:43:18,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:18,919 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:43:18,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2018-10-24 22:43:18,919 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [127], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:43:18,924 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:43:18,925 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:43:23,100 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:43:23,101 INFO L272 AbstractInterpreter]: Visited 166 different actions 510 times. Merged at 9 different actions 35 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-24 22:43:23,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:23,103 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:43:23,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:23,104 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:43:23,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:23,112 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:43:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:23,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:43:23,642 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 22:43:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-10-24 22:43:23,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:43:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 201 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-24 22:43:24,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:43:24,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-10-24 22:43:24,118 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:43:24,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 22:43:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 22:43:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-24 22:43:24,120 INFO L87 Difference]: Start difference. First operand 40152 states and 46751 transitions. Second operand 7 states. [2018-10-24 22:43:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:43:27,655 INFO L93 Difference]: Finished difference Result 91840 states and 108717 transitions. [2018-10-24 22:43:27,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 22:43:27,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 328 [2018-10-24 22:43:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:43:28,202 INFO L225 Difference]: With dead ends: 91840 [2018-10-24 22:43:28,202 INFO L226 Difference]: Without dead ends: 56286 [2018-10-24 22:43:28,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 656 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-24 22:43:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56286 states. [2018-10-24 22:43:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56286 to 55301. [2018-10-24 22:43:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55301 states. [2018-10-24 22:43:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55301 states to 55301 states and 63705 transitions. [2018-10-24 22:43:29,459 INFO L78 Accepts]: Start accepts. Automaton has 55301 states and 63705 transitions. Word has length 328 [2018-10-24 22:43:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:43:29,459 INFO L481 AbstractCegarLoop]: Abstraction has 55301 states and 63705 transitions. [2018-10-24 22:43:29,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 22:43:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 55301 states and 63705 transitions. [2018-10-24 22:43:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-24 22:43:29,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:43:29,524 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:43:29,525 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:43:29,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1949708440, now seen corresponding path program 1 times [2018-10-24 22:43:29,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:43:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:29,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:29,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:29,526 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:43:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:30,154 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-24 22:43:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 217 proven. 90 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-24 22:43:30,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:30,491 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:43:30,491 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 359 with the following transitions: [2018-10-24 22:43:30,491 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [350], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:43:30,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:43:30,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:43:39,103 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:43:39,103 INFO L272 AbstractInterpreter]: Visited 166 different actions 681 times. Merged at 9 different actions 51 times. Widened at 1 different actions 5 times. Found 10 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-24 22:43:39,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:39,110 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:43:39,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:39,110 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 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 [2018-10-24 22:43:39,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:39,120 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:43:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:39,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:43:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 22:43:39,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:43:40,117 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-24 22:43:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 255 proven. 34 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-24 22:43:40,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:43:40,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-24 22:43:40,362 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:43:40,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 22:43:40,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 22:43:40,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-24 22:43:40,363 INFO L87 Difference]: Start difference. First operand 55301 states and 63705 transitions. Second operand 9 states. [2018-10-24 22:43:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:43:47,146 INFO L93 Difference]: Finished difference Result 115316 states and 141821 transitions. [2018-10-24 22:43:47,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 22:43:47,147 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 358 [2018-10-24 22:43:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:43:47,376 INFO L225 Difference]: With dead ends: 115316 [2018-10-24 22:43:47,376 INFO L226 Difference]: Without dead ends: 55137 [2018-10-24 22:43:47,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 751 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=518, Invalid=1932, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 22:43:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55137 states. [2018-10-24 22:43:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55137 to 51725. [2018-10-24 22:43:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51725 states. [2018-10-24 22:43:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51725 states to 51725 states and 56687 transitions. [2018-10-24 22:43:49,108 INFO L78 Accepts]: Start accepts. Automaton has 51725 states and 56687 transitions. Word has length 358 [2018-10-24 22:43:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:43:49,109 INFO L481 AbstractCegarLoop]: Abstraction has 51725 states and 56687 transitions. [2018-10-24 22:43:49,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 22:43:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 51725 states and 56687 transitions. [2018-10-24 22:43:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-10-24 22:43:49,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:43:49,156 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:43:49,156 INFO L424 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:43:49,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1002685930, now seen corresponding path program 1 times [2018-10-24 22:43:49,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:43:49,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:49,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:49,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:43:49,158 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:43:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 227 proven. 32 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-24 22:43:49,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:49,534 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:43:49,534 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 373 with the following transitions: [2018-10-24 22:43:49,534 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:43:49,539 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:43:49,541 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:43:52,847 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:43:52,848 INFO L272 AbstractInterpreter]: Visited 166 different actions 654 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-24 22:43:52,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:43:52,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:43:52,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:43:52,855 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:43:52,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:43:52,866 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:43:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:43:53,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:43:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 332 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 22:43:53,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:43:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 332 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-24 22:43:53,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:43:53,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-24 22:43:53,591 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:43:53,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 22:43:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 22:43:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-24 22:43:53,592 INFO L87 Difference]: Start difference. First operand 51725 states and 56687 transitions. Second operand 9 states. [2018-10-24 22:43:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:43:58,400 INFO L93 Difference]: Finished difference Result 177770 states and 197807 transitions. [2018-10-24 22:43:58,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 22:43:58,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 372 [2018-10-24 22:43:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:43:58,846 INFO L225 Difference]: With dead ends: 177770 [2018-10-24 22:43:58,847 INFO L226 Difference]: Without dead ends: 127326 [2018-10-24 22:43:58,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 742 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-10-24 22:43:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127326 states. [2018-10-24 22:44:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127326 to 125936. [2018-10-24 22:44:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125936 states. [2018-10-24 22:44:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125936 states to 125936 states and 137692 transitions. [2018-10-24 22:44:02,229 INFO L78 Accepts]: Start accepts. Automaton has 125936 states and 137692 transitions. Word has length 372 [2018-10-24 22:44:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:44:02,229 INFO L481 AbstractCegarLoop]: Abstraction has 125936 states and 137692 transitions. [2018-10-24 22:44:02,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 22:44:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 125936 states and 137692 transitions. [2018-10-24 22:44:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-10-24 22:44:02,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:44:02,306 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, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:44:02,306 INFO L424 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:44:02,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:44:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -230384311, now seen corresponding path program 1 times [2018-10-24 22:44:02,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:44:02,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:44:02,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:44:02,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:44:02,308 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:44:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:44:03,009 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 22:44:03,217 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-24 22:44:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 255 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-24 22:44:03,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:44:03,366 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:44:03,366 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 383 with the following transitions: [2018-10-24 22:44:03,366 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [127], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [491], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:44:03,371 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:44:03,371 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:44:07,528 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:44:07,528 INFO L272 AbstractInterpreter]: Visited 166 different actions 503 times. Merged at 8 different actions 28 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-24 22:44:07,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:44:07,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:44:07,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:44:07,536 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:44:07,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:44:07,544 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:44:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:44:07,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:44:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-24 22:44:07,929 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:44:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 224 proven. 125 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-10-24 22:44:08,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:44:08,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-10-24 22:44:08,166 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:44:08,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 22:44:08,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 22:44:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-24 22:44:08,167 INFO L87 Difference]: Start difference. First operand 125936 states and 137692 transitions. Second operand 10 states. [2018-10-24 22:44:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:44:13,760 INFO L93 Difference]: Finished difference Result 274790 states and 308233 transitions. [2018-10-24 22:44:13,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 22:44:13,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 382 [2018-10-24 22:44:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:44:14,355 INFO L225 Difference]: With dead ends: 274790 [2018-10-24 22:44:14,355 INFO L226 Difference]: Without dead ends: 150137 [2018-10-24 22:44:14,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2018-10-24 22:44:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150137 states. [2018-10-24 22:44:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150137 to 145912. [2018-10-24 22:44:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145912 states. [2018-10-24 22:44:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145912 states to 145912 states and 160215 transitions. [2018-10-24 22:44:18,328 INFO L78 Accepts]: Start accepts. Automaton has 145912 states and 160215 transitions. Word has length 382 [2018-10-24 22:44:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:44:18,328 INFO L481 AbstractCegarLoop]: Abstraction has 145912 states and 160215 transitions. [2018-10-24 22:44:18,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 22:44:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 145912 states and 160215 transitions. [2018-10-24 22:44:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-10-24 22:44:18,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:44:18,390 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 22:44:18,390 INFO L424 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:44:18,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:44:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash -932464016, now seen corresponding path program 1 times [2018-10-24 22:44:18,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:44:18,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:44:18,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:44:18,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:44:18,392 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:44:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:44:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 330 proven. 97 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-10-24 22:44:18,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:44:18,922 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:44:18,923 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 394 with the following transitions: [2018-10-24 22:44:18,923 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [240], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:44:18,927 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:44:18,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 22:44:21,318 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 22:44:21,318 INFO L272 AbstractInterpreter]: Visited 166 different actions 503 times. Merged at 8 different actions 29 times. Widened at 1 different actions 2 times. Found 5 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-24 22:44:21,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:44:21,326 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 22:44:21,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:44:21,326 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:44:21,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:44:21,335 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:44:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:44:21,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:44:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 357 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-10-24 22:44:25,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 22:44:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 237 proven. 182 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-24 22:44:26,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 22:44:26,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2018-10-24 22:44:26,168 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 22:44:26,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 22:44:26,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 22:44:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-10-24 22:44:26,170 INFO L87 Difference]: Start difference. First operand 145912 states and 160215 transitions. Second operand 16 states. [2018-10-24 22:44:45,316 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 22:44:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 22:44:54,947 INFO L93 Difference]: Finished difference Result 494270 states and 582339 transitions. [2018-10-24 22:44:54,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-10-24 22:44:54,947 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 393 [2018-10-24 22:44:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 22:44:56,128 INFO L225 Difference]: With dead ends: 494270 [2018-10-24 22:44:56,128 INFO L226 Difference]: Without dead ends: 347362 [2018-10-24 22:44:56,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10493 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3820, Invalid=20986, Unknown=0, NotChecked=0, Total=24806 [2018-10-24 22:44:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347362 states. [2018-10-24 22:45:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347362 to 321235. [2018-10-24 22:45:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321235 states. [2018-10-24 22:45:04,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321235 states to 321235 states and 351462 transitions. [2018-10-24 22:45:04,548 INFO L78 Accepts]: Start accepts. Automaton has 321235 states and 351462 transitions. Word has length 393 [2018-10-24 22:45:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 22:45:04,549 INFO L481 AbstractCegarLoop]: Abstraction has 321235 states and 351462 transitions. [2018-10-24 22:45:04,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 22:45:04,549 INFO L276 IsEmpty]: Start isEmpty. Operand 321235 states and 351462 transitions. [2018-10-24 22:45:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-10-24 22:45:04,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 22:45:04,642 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 22:45:04,643 INFO L424 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 22:45:04,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 22:45:04,643 INFO L82 PathProgramCache]: Analyzing trace with hash -544882633, now seen corresponding path program 1 times [2018-10-24 22:45:04,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 22:45:04,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:45:04,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:45:04,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 22:45:04,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 22:45:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:45:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 264 proven. 167 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-10-24 22:45:05,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:45:05,085 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 22:45:05,085 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-10-24 22:45:05,086 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [124], [128], [132], [136], [139], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [315], [318], [322], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [733], [735], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-24 22:45:05,089 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 22:45:05,089 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-10-24 22:45:05,229 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-24 22:45:05,230 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-24 22:45:05,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 22:45:05,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 22:45:05,230 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:45:05,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 22:45:05,239 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 22:45:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 22:45:05,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 22:45:05,559 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 22:45:05,760 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 22:45:05,760 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 22:45:05,767 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 22:45:05,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:45:05 BoogieIcfgContainer [2018-10-24 22:45:05,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 22:45:05,768 INFO L168 Benchmark]: Toolchain (without parser) took 212507.46 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-10-24 22:45:05,769 INFO L168 Benchmark]: CDTParser took 0.18 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. [2018-10-24 22:45:05,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1268.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-24 22:45:05,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 320.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -884.0 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-24 22:45:05,771 INFO L168 Benchmark]: Boogie Preprocessor took 126.60 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-10-24 22:45:05,772 INFO L168 Benchmark]: RCFGBuilder took 5068.60 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 257.4 MB). Peak memory consumption was 257.4 MB. Max. memory is 7.1 GB. [2018-10-24 22:45:05,773 INFO L168 Benchmark]: TraceAbstraction took 205716.32 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 1.9 GB in the beginning and 2.6 GB in the end (delta: -606.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-24 22:45:05,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 1268.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 320.77 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -884.0 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.60 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5068.60 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 257.4 MB). Peak memory consumption was 257.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205716.32 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 1.9 GB in the beginning and 2.6 GB in the end (delta: -606.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1491]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1491). Cancelled while BasicCegarLoop was analyzing trace of length 425 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 9 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 205.6s OverallTime, 16 OverallIterations, 6 TraceHistogramMax, 127.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3599 SDtfs, 31703 SDslu, 4428 SDs, 0 SdLazy, 39082 SolverSat, 8567 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.1s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 5829 GetRequests, 5414 SyntacticMatches, 16 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12822 ImplicationChecksByTransitivity, 15.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321235occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 31.3s AbstIntTime, 10 AbstIntIterations, 2 AbstIntStrong, 0.9990214187652308 AbsIntWeakeningRatio, 0.26834381551362685 AbsIntAvgWeakeningVarsNumRemoved, 28.32285115303983 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 20.6s AutomataMinimizationTime, 15 MinimizatonAttempts, 37492 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 6320 NumberOfCodeBlocks, 6320 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 8658 ConstructedInterpolants, 0 QuantifiedInterpolants, 7654341 SizeOfPredicates, 29 NumberOfNonLiveVariables, 9738 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 29 InterpolantComputations, 6 PerfectInterpolantSequences, 6367/7248 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown